MASTER Net MASTER Database: GRB250430.73 page

Please use the reference to MASTER DataBase as Lipunov et al., 2010, MASTER Robotic Net, Advances in Astronomy, vol. 2010, p.30L

MASTER WFC:
Raw | Processing | Search
Single sets | Single images
SN | Asteroid | Transient | Comet

MASTER II:
Raw | Processing | Search by orbit elements | Search
SN | Asteroid | Transient | Two tube | Short transient | Tr. difference | Comet | Nova M31 | GRB | GRB_HPX | LIGO
Manual control | Planner | Planner Results | Planner NET

General:
SN list | Sky map | Add asteroid
Meteo | Focus | MASTER page
Users list | Users statistic | Logout

Search:

show search form
GRB coord: ErrorBox (deg): Sys Error (deg):
Sattel : Trigger: Notice:
GRB_Name: trignum: Nights after: FullSky


Name SWIFT GRB250430.73
Trignum 1308754
Trigger time 2025-04-30 17:31:00.28
Notice time 2025-04-30 17:31:46.779981
Coord, eb (15h 33m 42.72s , -18d 04m 58.8s) , 0.05
Max dist: 1 sigma 3 sigma
AGN candidates: Milliquas
r90wise
wiseXgaia
BL Lac candidates: 1 Sigma
3 Sigma

MASTER observatories and transients from them in error-field
Kislovodsk Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Amur Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Tunka Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
OAFA Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
IAC Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
SAAO Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Tavrida Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
OAGH Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)

You are viewing outdated information, relevant error box is here

All alerts for this trigger
id noticetime coord2000 satel errorbox type trigger seq trig_type links
2858301 2025-04-30 18:08:31.218347 15h 33m 32.67s -18d 07m 04.2s ANTARES 0.001 1308754
2858292 2025-04-30 17:34:14.416233 15h 33m 41.35s -18d 04m 52.0s SWIFT 0 alert 1308754 4 68 alert
2858300 2025-04-30 17:59:23.272447 15h 33m 32.64s -18d 07m 04.8s SWIFT 0.001 alert 1308754 3 67 alert
2858290 2025-04-30 17:31:46.779981 15h 33m 42.72s -18d 04m 58.8s SWIFT 0.05 alert 1308754 2 61 alert

DAYS:

MASTER optical transients in this field
Will be published in GCN, ATEL

Synchronous WFC images
Distance datetime coord2000 observatory camera links
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2025-04-30 17:31:00 (JD 2460796.229861)

Siderial time 10.618628 h

Ra 15:33:42.72 Dec -18:04:58.80
(233.428000d, -18.083000d)

Rise 2025-05-01 21:13:21

Transit 2025-05-02 01:22:51

Set 2025-05-01 05:36:16

Amur

Object: Altitude: 20.21 Azimuth: 15.93

Sun: Altitude: -19.23 Azimuth: 212.11

Moon: Altitude: -10.81 Azimuth: 170.17

Tunka

Object: Altitude: 19.70 Azimuth: 351.21

Sun: Altitude: -23.02 Azimuth: 187.22

Moon: Altitude: -4.10 Azimuth: 149.24

Kislovodsk

Object: Altitude: 1.65 Azimuth: 297.22

Sun: Altitude: -13.64 Azimuth: 126.77

Moon: Altitude: 23.17 Azimuth: 107.68

Tavrida

Object: Altitude: -4.31 Azimuth: 291.31

Sun: Altitude: -8.02 Azimuth: 120.34

Moon: Altitude: 29.31 Azimuth: 102.04

SAAO

Object: Altitude: 8.79 Azimuth: 285.89

Sun: Altitude: -20.10 Azimuth: 95.29

Moon: Altitude: 5.25 Azimuth: 128.43

IAC

Object: Altitude: -41.73 Azimuth: 269.55

Sun: Altitude: 26.76 Azimuth: 93.19

Moon: Altitude: 68.00 Azimuth: 95.94

Argentina

Object: Altitude: -40.10 Azimuth: 1.36

Sun: Altitude: 41.27 Azimuth: 161.24

Moon: Altitude: 24.36 Azimuth: 206.79

Mexico

Object: Altitude: -49.81 Azimuth: 98.70

Sun: Altitude: 60.82 Azimuth: 297.54

Moon: Altitude: 31.10 Azimuth: 253.59

Ural

Object: Altitude: 3.23 Azimuth: 311.19

Sun: Altitude: -11.89 Azimuth: 143.88

Moon: Altitude: 17.78 Azimuth: 114.82

Vostryakovo

Object: Altitude: -6.10 Azimuth: 293.25

Sun: Altitude: -4.37 Azimuth: 124.38

Moon: Altitude: 28.84 Azimuth: 98.87

Gal. latitude: 29.497217 Gal. longitude: 348.979346

Dist. to Sun: 164.737277

Dist. to Moon: 153.503825

Moon coord.: (80.126660 d, 28.273698 d)

Sun coord.: (37.853121 d, 14.903462 d)

Lunar disk: 0.124696

Lunar phase: 138.643086

Lunar bright limb: 260.256237

No SN in this field

2025-04-30 17:31:46 (JD 2460796.230394)

Siderial time 10.631440 h

Ra 15:33:42.72 Dec -18:04:58.80
(233.428000d, -18.083000d)

Rise 2025-05-01 21:13:21

Transit 2025-05-02 01:22:51

Set 2025-05-01 05:36:16

Amur

Object: Altitude: 20.17 Azimuth: 16.12

Sun: Altitude: -19.16 Azimuth: 212.30

Moon: Altitude: -10.83 Azimuth: 170.33

Tunka

Object: Altitude: 19.71 Azimuth: 351.41

Sun: Altitude: -23.00 Azimuth: 187.42

Moon: Altitude: -4.16 Azimuth: 149.39

Kislovodsk

Object: Altitude: 1.77 Azimuth: 297.35

Sun: Altitude: -13.75 Azimuth: 126.92

Moon: Altitude: 23.04 Azimuth: 107.79

Tavrida

Object: Altitude: -4.18 Azimuth: 291.45

Sun: Altitude: -8.13 Azimuth: 120.48

Moon: Altitude: 29.18 Azimuth: 102.15

SAAO

Object: Altitude: 8.95 Azimuth: 285.80

Sun: Altitude: -20.26 Azimuth: 95.19

Moon: Altitude: 5.13 Azimuth: 128.32

IAC

Object: Altitude: -41.56 Azimuth: 269.64

Sun: Altitude: 26.60 Azimuth: 93.27

Moon: Altitude: 67.84 Azimuth: 95.98

Argentina

Object: Altitude: -40.11 Azimuth: 1.12

Sun: Altitude: 41.22 Azimuth: 161.01

Moon: Altitude: 24.43 Azimuth: 206.63

Mexico

Object: Altitude: -49.97 Azimuth: 98.83

Sun: Altitude: 60.96 Azimuth: 297.78

Moon: Altitude: 31.25 Azimuth: 253.66

Ural

Object: Altitude: 3.31 Azimuth: 311.35

Sun: Altitude: -11.95 Azimuth: 144.06

Moon: Altitude: 17.69 Azimuth: 114.96

Vostryakovo

Object: Altitude: -6.00 Azimuth: 293.40

Sun: Altitude: -4.46 Azimuth: 124.54

Moon: Altitude: 28.74 Azimuth: 99.01

Gal. latitude: 29.497217 Gal. longitude: 348.979346

Dist. to Sun: 164.737793

Dist. to Moon: 153.496267

Moon coord.: (80.135423 d, 28.274287 d)

Sun coord.: (37.853629 d, 14.903624 d)

Lunar disk: 0.124737

Lunar phase: 138.635879

Lunar bright limb: 260.261113

No SN in this field

2025-04-30 18:31:46 (JD 2460796.272060)

Siderial time 11.634178 h

Ra 15:33:42.72 Dec -18:04:58.80
(233.428000d, -18.083000d)

Rise 2025-05-01 21:13:21

Transit 2025-05-02 01:22:51

Set 2025-05-01 05:36:16

Amur

Object: Altitude: 16.36 Azimuth: 30.63

Sun: Altitude: -13.10 Azimuth: 226.01

Moon: Altitude: -11.30 Azimuth: 183.19

Tunka

Object: Altitude: 19.87 Azimuth: 6.60

Sun: Altitude: -20.57 Azimuth: 202.82

Moon: Altitude: -7.80 Azimuth: 161.55

Kislovodsk

Object: Altitude: 10.89 Azimuth: 308.44

Sun: Altitude: -21.62 Azimuth: 139.70

Moon: Altitude: 13.47 Azimuth: 116.48

Tavrida

Object: Altitude: 5.35 Azimuth: 302.11

Sun: Altitude: -16.69 Azimuth: 132.47

Moon: Altitude: 19.44 Azimuth: 111.00

SAAO

Object: Altitude: 21.36 Azimuth: 278.43

Sun: Altitude: -32.93 Azimuth: 87.28

Moon: Altitude: -4.90 Azimuth: 120.63

IAC

Object: Altitude: -28.34 Azimuth: 276.32

Sun: Altitude: 13.49 Azimuth: 99.88

Moon: Altitude: 55.33 Azimuth: 99.71

Argentina

Object: Altitude: -38.30 Azimuth: 342.79

Sun: Altitude: 35.30 Azimuth: 144.11

Moon: Altitude: 28.57 Azimuth: 193.29

Mexico

Object: Altitude: -62.41 Azimuth: 111.71

Sun: Altitude: 70.79 Azimuth: 324.57

Moon: Altitude: 43.21 Azimuth: 258.81

Ural

Object: Altitude: 8.78 Azimuth: 324.64

Sun: Altitude: -15.86 Azimuth: 158.44

Moon: Altitude: 11.01 Azimuth: 126.03

Vostryakovo

Object: Altitude: 1.43 Azimuth: 305.64

Sun: Altitude: -10.86 Azimuth: 137.67

Moon: Altitude: 20.89 Azimuth: 109.94

Gal. latitude: 29.497217 Gal. longitude: 348.979346

Dist. to Sun: 164.778170

Dist. to Moon: 152.904839

Moon coord.: (80.821052 d, 28.318587 d)

Sun coord.: (37.893402 d, 14.916337 d)

Lunar disk: 0.128006

Lunar phase: 138.072216

Lunar bright limb: 260.641917

No SN in this field

2025-05-02 18:54:41 (JD 2460798.287975)

Siderial time 12.148588 h

Ra 15:33:42.72 Dec -18:04:58.80
(233.428000d, -18.083000d)

Rise 2025-05-03 21:05:29

Transit 2025-05-04 01:14:59

Set 2025-05-03 05:28:24

Amur

Object: Altitude: 13.59 Azimuth: 37.66

Sun: Altitude: -9.82 Azimuth: 230.66

Moon: Altitude: -10.98 Azimuth: 161.22

Tunka

Object: Altitude: 19.01 Azimuth: 14.33

Sun: Altitude: -18.44 Azimuth: 208.33

Moon: Altitude: -2.25 Azimuth: 140.64

Kislovodsk

Object: Altitude: 15.06 Azimuth: 314.63

Sun: Altitude: -23.63 Azimuth: 145.39

Moon: Altitude: 28.90 Azimuth: 100.26

Tavrida

Object: Altitude: 9.84 Azimuth: 307.97

Sun: Altitude: -19.07 Azimuth: 137.82

Moon: Altitude: 35.07 Azimuth: 94.19

SAAO

Object: Altitude: 27.83 Azimuth: 274.64

Sun: Altitude: -38.10 Azimuth: 84.58

Moon: Altitude: 12.66 Azimuth: 133.22

IAC

Object: Altitude: -21.62 Azimuth: 279.55

Sun: Altitude: 8.76 Azimuth: 102.98

Moon: Altitude: 76.30 Azimuth: 86.22

Argentina

Object: Altitude: -35.89 Azimuth: 334.10

Sun: Altitude: 31.73 Azimuth: 138.91

Moon: Altitude: 21.57 Azimuth: 215.85

Mexico

Object: Altitude: -68.31 Azimuth: 122.23

Sun: Altitude: 73.65 Azimuth: 340.50

Moon: Altitude: 22.49 Azimuth: 251.62

Ural

Object: Altitude: 11.00 Azimuth: 331.73

Sun: Altitude: -16.27 Azimuth: 164.27

Moon: Altitude: 21.30 Azimuth: 106.27

Vostryakovo

Object: Altitude: 4.84 Azimuth: 312.14

Sun: Altitude: -12.39 Azimuth: 143.19

Moon: Altitude: 33.00 Azimuth: 89.84

Gal. latitude: 29.497217 Gal. longitude: 348.979346

Dist. to Sun: 166.729607

Dist. to Moon: 124.903381

Moon coord.: (112.781501 d, 26.542201 d)

Sun coord.: (39.822073 d, 15.522715 d)

Lunar disk: 0.314979

Lunar phase: 111.718189

Lunar bright limb: 277.043894

No SN in this field
Recent coverage and limits telegrams

 #######################################################################################
#######################################################################################

  ID = 12482
TYPE = 35
DAYS = 1


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB 250430A ( T. M. Parsotan et al., GCN 40292) errorbox  1266 sec after notice time and 1293 sec after trigger time at 2025-04-30 17:52:33 UT, with upper limit up to  19.8 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -23.9 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 250430A errorbox  22453 sec after notice time and 22480 sec after trigger time at 2025-04-30 23:45:40 UT, with upper limit up to  20.6 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -23.3 deg. 

MASTER-Tunka robotic telescope  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the SWIFT GRB 250430A errorbox  74901 sec after notice time and 74929 sec after trigger time at 2025-05-01 14:19:49 UT, with upper limit up to  18.2 mag. Observations started at twilight.  The observations began at zenith distance = 85 deg. The sun  altitude  is -14.8 deg. 

The galactic latitude b = 29 deg., longitude l = 349 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858282

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

    1384 |         MASTER-SAAO |   C |   180 | 17.5 |        
    1504 |         MASTER-SAAO |   C |   420 | 18.5 |  Coadd 
    1583 |         MASTER-SAAO |   C |   180 | 18.2 |        
    1731 |         MASTER-SAAO |   C |    60 | 17.8 |        
    1810 |         MASTER-SAAO |   C |    60 | 17.9 |        
    1870 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    1889 |         MASTER-SAAO |   C |    60 | 17.9 |        
    1968 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2048 |         MASTER-SAAO |   C |    60 | 18.1 |        
    2108 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    2127 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2206 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2285 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2345 |         MASTER-SAAO |   C |   180 | 18.5 |  Coadd 
    2364 |         MASTER-SAAO |   C |    60 | 17.8 |        
    2443 |         MASTER-SAAO |   C |    60 | 17.8 |        
    2522 |         MASTER-SAAO |   C |    60 | 17.7 |        
    2582 |         MASTER-SAAO |   C |   180 | 18.4 |  Coadd 
    2601 |         MASTER-SAAO |   C |    60 | 17.7 |        
    2680 |         MASTER-SAAO |   C |    60 | 17.7 |        
    2760 |         MASTER-SAAO |   C |    60 | 17.4 |        
    2820 |         MASTER-SAAO |   C |   180 | 18.3 |  Coadd 
    2839 |         MASTER-SAAO |   C |    60 | 17.5 |        
    2918 |         MASTER-SAAO |   C |    60 | 17.3 |        
    2997 |         MASTER-SAAO |   C |    60 | 17.5 |        
    3076 |         MASTER-SAAO |   C |    60 | 17.7 |        
    3155 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3234 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3294 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    3313 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3392 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3471 |         MASTER-SAAO |   C |    60 | 17.8 |        
    3531 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    3550 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4120 |         MASTER-SAAO |   C |  1200 | 19.6 |  Coadd 
    3630 |         MASTER-SAAO |   C |    60 | 18.0 |        
    3709 |         MASTER-SAAO |   C |    60 | 18.1 |        
    3769 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    3788 |         MASTER-SAAO |   C |    60 | 18.1 |        
    3867 |         MASTER-SAAO |   C |    60 | 18.1 |        
    3946 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4006 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    4025 |         MASTER-SAAO |   C |    60 | 18.1 |        
    4183 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4262 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4322 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    4341 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4420 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4499 |         MASTER-SAAO |   C |    60 | 17.8 |        
    4559 |         MASTER-SAAO |   C |   180 | 18.4 |  Coadd 
    4578 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4657 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4736 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4796 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    4815 |         MASTER-SAAO |   C |    60 | 18.1 |        
    4894 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4973 |         MASTER-SAAO |   C |    60 | 18.0 |        
    5033 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    5051 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5130 |         MASTER-SAAO |   C |    60 | 18.1 |        
    5209 |         MASTER-SAAO |   C |    60 | 18.1 |        
    5269 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    5359 |         MASTER-SAAO |   C |   360 | 19.0 |  Coadd 
    5289 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5367 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5447 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5507 |         MASTER-SAAO |   C |   180 | 18.3 |  Coadd 
    5525 |         MASTER-SAAO |   C |    60 | 18.0 |        
    5606 |         MASTER-SAAO |   C |    60 | 14.5 |        
    9546 |         MASTER-SAAO |   C |   180 | 19.4 |        
    9726 |         MASTER-SAAO |   C |   540 | 19.4 |  Coadd 
    9746 |         MASTER-SAAO |   C |   180 | 18.6 |        
    9945 |         MASTER-SAAO |   C |   180 | 17.5 |        
   12421 |         MASTER-SAAO |   C |   180 | 18.8 |        
   12620 |         MASTER-SAAO |   C |   180 | 18.3 |        
   15023 |         MASTER-SAAO |   C |   180 | 19.0 |        
   15203 |         MASTER-SAAO |   C |   540 | 19.8 |  Coadd 
   15222 |         MASTER-SAAO |   C |   180 | 18.7 |        
   15421 |         MASTER-SAAO |   C |   180 | 19.6 |        
   15621 |         MASTER-SAAO |   C |   180 | 19.5 |        
   17307 |         MASTER-SAAO |   C |   180 | 19.6 |        
   18567 |         MASTER-SAAO |   C |   180 | 18.2 |        
   19870 |         MASTER-SAAO |   C |   180 | 18.3 |        
   22571 |         MASTER-OAFA |   C |   180 | 17.1 |        
   22704 |         MASTER-SAAO |   C |   180 | 18.7 |        
   22766 |         MASTER-OAFA |   C |   180 | 17.5 |        
   22959 |         MASTER-OAFA |   C |   180 | 17.7 |        
   23155 |         MASTER-OAFA |   C |   180 | 18.0 |        
   23354 |         MASTER-OAFA |   C |   180 | 18.3 |        
   23916 |         MASTER-OAFA |   C |   180 | 18.1 |        
   24110 |         MASTER-OAFA |   C |   180 | 18.2 |        
   25377 |         MASTER-OAFA |   C |   180 | 18.1 |        
   27845 |         MASTER-OAFA |   C |   180 | 16.5 |        
   29081 |         MASTER-OAFA |   C |   180 | 19.5 |        
   30334 |         MASTER-OAFA |   C |   180 | 19.9 |        
   31276 |         MASTER-SAAO |   C |   180 | 18.7 |        
   31579 |         MASTER-OAFA |   C |   180 | 19.9 |        
   32860 |         MASTER-OAFA |   C |   180 | 19.0 |        
   34427 |         MASTER-OAFA |   C |   180 | 19.8 |        
   34964 |         MASTER-SAAO |   C |   180 | 16.7 |        
   35672 |         MASTER-OAFA |   C |   180 | 19.9 |        
   36892 |         MASTER-OAFA |   C |   180 | 19.7 |        
   36981 |         MASTER-SAAO |   C |   180 | 15.6 |        
   38186 |         MASTER-OAFA |   C |   180 | 19.9 |        
   39414 |         MASTER-OAFA |   C |   180 | 19.8 |        
   40658 |         MASTER-OAFA |   C |   180 | 20.4 |        
   41897 |         MASTER-OAFA |   C |   180 | 19.9 |        
   43374 |         MASTER-OAFA |   C |   180 | 19.7 |        
   44625 |         MASTER-OAFA |   C |   180 | 20.2 |        
   45898 |         MASTER-OAFA |   C |   180 | 20.6 |        
   47133 |         MASTER-OAFA |   C |   180 | 20.3 |        
   48360 |         MASTER-OAFA |   C |   180 | 19.7 |        
   49667 |         MASTER-OAFA |   C |   180 | 19.8 |        
   50895 |         MASTER-OAFA |   C |   180 | 19.8 |        
   52133 |         MASTER-OAFA |   C |   180 | 20.1 |        
   53372 |         MASTER-OAFA |   C |   180 | 19.9 |        
   54683 |         MASTER-OAFA |   C |   180 | 20.2 |        
   74974 |        MASTER-Tunka |   C |    90 | 17.2 |        
   76273 |        MASTER-Tunka |   C |   180 | 17.7 |        
   77542 |        MASTER-Tunka |   C |   180 | 17.9 |        
   77542 |             MASTER- |   C |   180 | 17.8 |        
   78801 |        MASTER-Tunka |   C |   180 | 17.8 |        
   78801 |             MASTER- |   C |   180 | 17.9 |        
   80059 |        MASTER-Tunka |   C |   180 | 18.2 |        
   80059 |             MASTER- |   C |   180 | 18.1 |        
   81270 |        MASTER-Tunka |   C |   180 | 17.3 |        
   81270 |             MASTER- |   C |   180 | 17.0 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 12481
TYPE = 35
DAYS = 1


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the EP250430a ( EP Team et al., GCN 40299) errorbox 1288 sec after trigger time at 2025-04-30 17:52:33 UT, with upper limit up to  19.8 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -23.9 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the EP250430a errorbox 22475 sec after trigger time at 2025-04-30 23:45:40 UT, with upper limit up to  20.6 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -23.3 deg. 

MASTER-Tunka robotic telescope  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the EP250430a errorbox  22048 sec after notice time and 74924 sec after trigger time at 2025-05-01 14:19:49 UT, with upper limit up to  18.2 mag. Observations started at twilight.  The observations began at zenith distance = 85 deg. The sun  altitude  is -14.8 deg. 

The galactic latitude b = 29 deg., longitude l = 349 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858517

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    1379 | 2025-04-30 17:52:33 |         MASTER-SAAO | (15h 29m 47.13s , -17d 57m 49.8s) |   C |   180 | 17.5 |        
    1499 | 2025-04-30 17:52:33 |         MASTER-SAAO | (15h 29m 47.14s , -17d 57m 49.7s) |   C |   420 | 18.5 |  Coadd 
    1578 | 2025-04-30 17:55:53 |         MASTER-SAAO | (15h 29m 54.09s , -17d 58m 47.9s) |   C |   180 | 18.2 |        
    1726 | 2025-04-30 17:59:20 |         MASTER-SAAO | (15h 29m 42.85s , -18d 01m 47.2s) |   C |    60 | 17.8 |        
    1805 | 2025-04-30 18:00:40 |         MASTER-SAAO | (15h 29m 42.79s , -18d 01m 47.5s) |   C |    60 | 17.9 |        
    1865 | 2025-04-30 18:00:40 |         MASTER-SAAO | (15h 29m 42.78s , -18d 01m 47.5s) |   C |   180 | 18.6 |  Coadd 
    1884 | 2025-04-30 18:01:59 |         MASTER-SAAO | (15h 29m 42.74s , -18d 01m 47.9s) |   C |    60 | 17.9 |        
    1964 | 2025-04-30 18:03:18 |         MASTER-SAAO | (15h 29m 42.67s , -18d 01m 47.9s) |   C |    60 | 18.0 |        
    2043 | 2025-04-30 18:04:37 |         MASTER-SAAO | (15h 29m 42.57s , -18d 01m 48.6s) |   C |    60 | 18.1 |        
    2103 | 2025-04-30 18:04:37 |         MASTER-SAAO | (15h 29m 42.57s , -18d 01m 48.6s) |   C |   180 | 18.7 |  Coadd 
    2122 | 2025-04-30 18:05:56 |         MASTER-SAAO | (15h 29m 42.48s , -18d 01m 49.5s) |   C |    60 | 18.0 |        
    2201 | 2025-04-30 18:07:16 |         MASTER-SAAO | (15h 29m 42.40s , -18d 01m 50.0s) |   C |    60 | 18.0 |        
    2280 | 2025-04-30 18:08:35 |         MASTER-SAAO | (15h 29m 42.38s , -18d 01m 50.2s) |   C |    60 | 18.0 |        
    2340 | 2025-04-30 18:08:35 |         MASTER-SAAO | (15h 29m 42.37s , -18d 01m 50.2s) |   C |   180 | 18.5 |  Coadd 
    2360 | 2025-04-30 18:09:54 |         MASTER-SAAO | (15h 29m 42.27s , -18d 01m 50.9s) |   C |    60 | 17.8 |        
    2438 | 2025-04-30 18:11:13 |         MASTER-SAAO | (15h 29m 42.19s , -18d 01m 51.5s) |   C |    60 | 17.8 |        
    2517 | 2025-04-30 18:12:32 |         MASTER-SAAO | (15h 29m 42.15s , -18d 01m 51.7s) |   C |    60 | 17.7 |        
    2577 | 2025-04-30 18:12:32 |         MASTER-SAAO | (15h 29m 42.15s , -18d 01m 51.7s) |   C |   180 | 18.4 |  Coadd 
    2597 | 2025-04-30 18:13:51 |         MASTER-SAAO | (15h 29m 42.04s , -18d 01m 52.7s) |   C |    60 | 17.7 |        
    2676 | 2025-04-30 18:15:10 |         MASTER-SAAO | (15h 29m 41.95s , -18d 01m 52.8s) |   C |    60 | 17.7 |        
    2755 | 2025-04-30 18:16:29 |         MASTER-SAAO | (15h 29m 41.94s , -18d 01m 53.3s) |   C |    60 | 17.4 |        
    2815 | 2025-04-30 18:16:29 |         MASTER-SAAO | (15h 29m 41.94s , -18d 01m 53.3s) |   C |   180 | 18.3 |  Coadd 
    2834 | 2025-04-30 18:17:49 |         MASTER-SAAO | (15h 29m 41.89s , -18d 01m 53.5s) |   C |    60 | 17.5 |        
    2913 | 2025-04-30 18:19:08 |         MASTER-SAAO | (15h 29m 41.92s , -18d 01m 53.5s) |   C |    60 | 17.3 |        
    2992 | 2025-04-30 18:20:27 |         MASTER-SAAO | (15h 29m 41.80s , -18d 01m 54.7s) |   C |    60 | 17.5 |        
    3071 | 2025-04-30 18:21:46 |         MASTER-SAAO | (15h 29m 41.70s , -18d 01m 54.8s) |   C |    60 | 17.7 |        
    3150 | 2025-04-30 18:23:05 |         MASTER-SAAO | (15h 29m 41.50s , -18d 01m 56.5s) |   C |    60 | 17.9 |        
    3229 | 2025-04-30 18:24:24 |         MASTER-SAAO | (15h 29m 41.50s , -18d 01m 56.9s) |   C |    60 | 17.9 |        
    3289 | 2025-04-30 18:24:24 |         MASTER-SAAO | (15h 29m 41.50s , -18d 01m 56.9s) |   C |   180 | 18.6 |  Coadd 
    3308 | 2025-04-30 18:25:43 |         MASTER-SAAO | (15h 29m 41.38s , -18d 01m 57.7s) |   C |    60 | 17.9 |        
    3387 | 2025-04-30 18:27:02 |         MASTER-SAAO | (15h 29m 41.20s , -18d 01m 59.5s) |   C |    60 | 17.9 |        
    3466 | 2025-04-30 18:28:21 |         MASTER-SAAO | (15h 29m 41.12s , -18d 02m 00.7s) |   C |    60 | 17.8 |        
    3526 | 2025-04-30 18:28:21 |         MASTER-SAAO | (15h 29m 41.11s , -18d 02m 00.8s) |   C |   180 | 18.6 |  Coadd 
    3546 | 2025-04-30 18:29:40 |         MASTER-SAAO | (15h 29m 40.96s , -18d 02m 01.0s) |   C |    60 | 17.9 |        
    4116 | 2025-04-30 18:29:40 |         MASTER-SAAO | (15h 29m 40.97s , -18d 02m 01.0s) |   C |  1200 | 19.6 |  Coadd 
    3625 | 2025-04-30 18:30:59 |         MASTER-SAAO | (15h 29m 40.88s , -18d 02m 02.3s) |   C |    60 | 18.0 |        
    3704 | 2025-04-30 18:32:19 |         MASTER-SAAO | (15h 29m 40.80s , -18d 02m 03.3s) |   C |    60 | 18.1 |        
    3764 | 2025-04-30 18:32:19 |         MASTER-SAAO | (15h 29m 40.81s , -18d 02m 03.3s) |   C |   180 | 18.7 |  Coadd 
    3783 | 2025-04-30 18:33:37 |         MASTER-SAAO | (15h 29m 40.68s , -18d 02m 04.5s) |   C |    60 | 18.1 |        
    3862 | 2025-04-30 18:34:57 |         MASTER-SAAO | (15h 29m 40.57s , -18d 02m 06.1s) |   C |    60 | 18.1 |        
    3941 | 2025-04-30 18:36:16 |         MASTER-SAAO | (15h 29m 40.43s , -18d 02m 07.2s) |   C |    60 | 17.9 |        
    4001 | 2025-04-30 18:36:16 |         MASTER-SAAO | (15h 29m 40.43s , -18d 02m 07.2s) |   C |   180 | 18.7 |  Coadd 
    4020 | 2025-04-30 18:37:35 |         MASTER-SAAO | (15h 29m 40.27s , -18d 02m 08.1s) |   C |    60 | 18.1 |        
    4179 | 2025-04-30 18:40:13 |         MASTER-SAAO | (15h 29m 40.09s , -18d 02m 09.6s) |   C |    60 | 18.0 |        
    4257 | 2025-04-30 18:41:32 |         MASTER-SAAO | (15h 29m 40.01s , -18d 02m 10.7s) |   C |    60 | 17.9 |        
    4317 | 2025-04-30 18:41:32 |         MASTER-SAAO | (15h 29m 40.00s , -18d 02m 10.7s) |   C |   180 | 18.6 |  Coadd 
    4336 | 2025-04-30 18:42:51 |         MASTER-SAAO | (15h 29m 39.93s , -18d 02m 11.1s) |   C |    60 | 17.9 |        
    4415 | 2025-04-30 18:44:10 |         MASTER-SAAO | (15h 29m 39.80s , -18d 02m 11.6s) |   C |    60 | 18.0 |        
    4494 | 2025-04-30 18:45:29 |         MASTER-SAAO | (15h 29m 39.75s , -18d 02m 12.2s) |   C |    60 | 17.8 |        
    4554 | 2025-04-30 18:45:29 |         MASTER-SAAO | (15h 29m 39.75s , -18d 02m 12.2s) |   C |   180 | 18.4 |  Coadd 
    4573 | 2025-04-30 18:46:48 |         MASTER-SAAO | (15h 29m 39.62s , -18d 02m 12.9s) |   C |    60 | 18.0 |        
    4652 | 2025-04-30 18:48:07 |         MASTER-SAAO | (15h 29m 39.47s , -18d 02m 13.3s) |   C |    60 | 17.9 |        
    4731 | 2025-04-30 18:49:26 |         MASTER-SAAO | (15h 29m 39.42s , -18d 02m 14.5s) |   C |    60 | 18.0 |        
    4791 | 2025-04-30 18:49:26 |         MASTER-SAAO | (15h 29m 39.42s , -18d 02m 14.5s) |   C |   180 | 18.7 |  Coadd 
    4810 | 2025-04-30 18:50:45 |         MASTER-SAAO | (15h 29m 39.33s , -18d 02m 15.2s) |   C |    60 | 18.1 |        
    4889 | 2025-04-30 18:52:04 |         MASTER-SAAO | (15h 29m 39.28s , -18d 02m 15.9s) |   C |    60 | 17.9 |        
    4968 | 2025-04-30 18:53:22 |         MASTER-SAAO | (15h 29m 39.14s , -18d 02m 16.9s) |   C |    60 | 18.0 |        
    5028 | 2025-04-30 18:53:22 |         MASTER-SAAO | (15h 29m 39.15s , -18d 02m 16.9s) |   C |   180 | 18.7 |  Coadd 
    5047 | 2025-04-30 18:54:41 |         MASTER-SAAO | (15h 29m 39.05s , -18d 02m 17.4s) |   C |    60 | 17.9 |        
    5126 | 2025-04-30 18:56:00 |         MASTER-SAAO | (15h 29m 38.90s , -18d 02m 19.2s) |   C |    60 | 18.1 |        
    5205 | 2025-04-30 18:57:19 |         MASTER-SAAO | (15h 29m 38.76s , -18d 02m 20.1s) |   C |    60 | 18.1 |        
    5265 | 2025-04-30 18:57:19 |         MASTER-SAAO | (15h 29m 38.76s , -18d 02m 20.2s) |   C |   180 | 18.6 |  Coadd 
    5355 | 2025-04-30 18:57:19 |         MASTER-SAAO | (15h 29m 38.78s , -18d 02m 20.2s) |   C |   360 | 19.0 |  Coadd 
    5284 | 2025-04-30 18:58:38 |         MASTER-SAAO | (15h 29m 38.65s , -18d 02m 21.5s) |   C |    60 | 17.9 |        
    5363 | 2025-04-30 18:59:57 |         MASTER-SAAO | (15h 29m 38.52s , -18d 02m 21.9s) |   C |    60 | 17.9 |        
    5442 | 2025-04-30 19:01:16 |         MASTER-SAAO | (15h 29m 38.37s , -18d 02m 22.9s) |   C |    60 | 17.9 |        
    5502 | 2025-04-30 19:01:16 |         MASTER-SAAO | (15h 29m 38.38s , -18d 02m 22.9s) |   C |   180 | 18.3 |  Coadd 
    5521 | 2025-04-30 19:02:35 |         MASTER-SAAO | (15h 29m 38.20s , -18d 02m 23.9s) |   C |    60 | 18.0 |        
    5601 | 2025-04-30 19:03:55 |         MASTER-SAAO | (15h 29m 38.12s , -18d 02m 24.6s) |   C |    60 | 14.5 |        
    9541 | 2025-04-30 20:08:36 |         MASTER-SAAO | (15h 29m 38.05s , -17d 58m 45.0s) |   C |   180 | 19.4 |        
    9721 | 2025-04-30 20:08:36 |         MASTER-SAAO | (15h 29m 38.05s , -17d 58m 45.0s) |   C |   540 | 19.4 |  Coadd 
    9741 | 2025-04-30 20:11:56 |         MASTER-SAAO | (15h 29m 43.77s , -17d 59m 43.6s) |   C |   180 | 18.6 |        
    9941 | 2025-04-30 20:15:15 |         MASTER-SAAO | (15h 29m 37.33s , -18d 00m 43.5s) |   C |   180 | 17.5 |        
   12416 | 2025-04-30 20:56:31 |         MASTER-SAAO | (15h 32m 05.29s , -18d 14m 46.4s) |   C |   180 | 18.8 |        
   12616 | 2025-04-30 20:59:50 |         MASTER-SAAO | (15h 32m 10.04s , -18d 15m 42.1s) |   C |   180 | 18.3 |        
   15018 | 2025-04-30 21:39:53 |         MASTER-SAAO | (15h 32m 02.57s , -18d 14m 19.3s) |   C |   180 | 19.0 |        
   15198 | 2025-04-30 21:39:53 |         MASTER-SAAO | (15h 32m 02.57s , -18d 14m 19.3s) |   C |   540 | 19.8 |  Coadd 
   15217 | 2025-04-30 21:43:12 |         MASTER-SAAO | (15h 32m 08.65s , -18d 15m 14.4s) |   C |   180 | 18.7 |        
   15417 | 2025-04-30 21:46:31 |         MASTER-SAAO | (15h 32m 01.07s , -18d 16m 10.2s) |   C |   180 | 19.6 |        
   15616 | 2025-04-30 21:49:50 |         MASTER-SAAO | (15h 32m 07.90s , -18d 16m 06.4s) |   C |   180 | 19.5 |        
   17303 | 2025-04-30 22:17:57 |         MASTER-SAAO | (15h 31m 56.79s , -18d 13m 51.8s) |   C |   180 | 19.6 |        
   18562 | 2025-04-30 22:38:57 |         MASTER-SAAO | (15h 32m 09.12s , -18d 15m 24.1s) |   C |   180 | 18.2 |        
   19866 | 2025-04-30 23:00:40 |         MASTER-SAAO | (15h 32m 17.87s , -18d 13m 14.7s) |   C |   180 | 18.3 |        
   22566 | 2025-04-30 23:45:40 |         MASTER-OAFA | (15h 34m 14.55s , -18d 12m 11.5s) |   C |   180 | 17.1 |        
   22699 | 2025-04-30 23:47:54 |         MASTER-SAAO | (15h 32m 38.08s , -18d 12m 13.5s) |   C |   180 | 18.7 |        
   22761 | 2025-04-30 23:48:55 |         MASTER-OAFA | (15h 34m 20.34s , -18d 12m 59.8s) |   C |   180 | 17.5 |        
   22954 | 2025-04-30 23:52:09 |         MASTER-OAFA | (15h 34m 14.62s , -18d 13m 48.0s) |   C |   180 | 17.7 |        
   23150 | 2025-04-30 23:55:25 |         MASTER-OAFA | (15h 34m 20.73s , -18d 13m 22.5s) |   C |   180 | 18.0 |        
   23350 | 2025-04-30 23:58:44 |         MASTER-OAFA | (15h 34m 17.16s , -18d 11m 41.0s) |   C |   180 | 18.3 |        
   23911 | 2025-05-01 00:08:05 |         MASTER-OAFA | (15h 34m 17.13s , -18d 12m 41.7s) |   C |   180 | 18.1 |        
   24105 | 2025-05-01 00:11:19 |         MASTER-OAFA | (15h 34m 19.00s , -18d 10m 50.1s) |   C |   180 | 18.2 |        
   25372 | 2025-05-01 00:32:27 |         MASTER-OAFA | (15h 34m 20.63s , -18d 11m 51.4s) |   C |   180 | 18.1 |        
   27840 | 2025-05-01 01:13:35 |         MASTER-OAFA | (15h 34m 20.29s , -18d 10m 08.4s) |   C |   180 | 16.5 |        
   29077 | 2025-05-01 01:34:11 |         MASTER-OAFA | (15h 34m 20.66s , -18d 08m 34.8s) |   C |   180 | 19.5 |        
   30330 | 2025-05-01 01:55:04 |         MASTER-OAFA | (15h 34m 14.37s , -18d 06m 06.1s) |   C |   180 | 19.9 |        
   31271 | 2025-05-01 02:10:46 |         MASTER-SAAO | (15h 32m 54.28s , -18d 08m 04.6s) |   C |   180 | 18.7 |        
   31574 | 2025-05-01 02:15:49 |         MASTER-OAFA | (15h 34m 16.54s , -18d 07m 03.4s) |   C |   180 | 19.9 |        
   32855 | 2025-05-01 02:37:10 |         MASTER-OAFA | (15h 34m 12.25s , -18d 07m 12.6s) |   C |   180 | 19.0 |        
   34422 | 2025-05-01 03:03:17 |         MASTER-OAFA | (15h 34m 11.99s , -18d 04m 14.6s) |   C |   180 | 19.8 |        
   34960 | 2025-05-01 03:12:14 |         MASTER-SAAO | (15h 32m 36.46s , -18d 05m 30.8s) |   C |   180 | 16.7 |        
   35668 | 2025-05-01 03:24:02 |         MASTER-OAFA | (15h 34m 14.24s , -18d 04m 14.8s) |   C |   180 | 19.9 |        
   36887 | 2025-05-01 03:44:22 |         MASTER-OAFA | (15h 34m 09.64s , -18d 05m 37.0s) |   C |   180 | 19.7 |        
   36976 | 2025-05-01 03:45:50 |         MASTER-SAAO | (15h 32m 34.07s , -18d 04m 13.3s) |   C |   180 | 15.6 |        
   38181 | 2025-05-01 04:05:56 |         MASTER-OAFA | (15h 32m 14.05s , -17d 47m 40.1s) |   C |   180 | 19.9 |        
   39409 | 2025-05-01 04:26:23 |         MASTER-OAFA | (15h 32m 21.41s , -17d 47m 09.0s) |   C |   180 | 19.8 |        
   40653 | 2025-05-01 04:47:08 |         MASTER-OAFA | (15h 32m 19.99s , -17d 46m 48.3s) |   C |   180 | 20.4 |        
   41892 | 2025-05-01 05:07:47 |         MASTER-OAFA | (15h 32m 17.36s , -17d 47m 48.8s) |   C |   180 | 19.9 |        
   43370 | 2025-05-01 05:32:24 |         MASTER-OAFA | (15h 32m 25.07s , -17d 47m 22.9s) |   C |   180 | 19.7 |        
   44620 | 2025-05-01 05:53:15 |         MASTER-OAFA | (15h 32m 25.34s , -17d 45m 34.7s) |   C |   180 | 20.2 |        
   45893 | 2025-05-01 06:14:27 |         MASTER-OAFA | (15h 32m 21.25s , -17d 45m 05.7s) |   C |   180 | 20.6 |        
   47128 | 2025-05-01 06:35:03 |         MASTER-OAFA | (15h 32m 24.27s , -17d 45m 19.3s) |   C |   180 | 20.3 |        
   48355 | 2025-05-01 06:55:29 |         MASTER-OAFA | (15h 32m 28.06s , -17d 45m 10.4s) |   C |   180 | 19.7 |        
   49663 | 2025-05-01 07:17:17 |         MASTER-OAFA | (15h 32m 22.99s , -17d 45m 11.4s) |   C |   180 | 19.8 |        
   50890 | 2025-05-01 07:37:45 |         MASTER-OAFA | (15h 32m 21.89s , -17d 42m 58.8s) |   C |   180 | 19.8 |        
   52128 | 2025-05-01 07:58:23 |         MASTER-OAFA | (15h 32m 28.26s , -17d 43m 14.2s) |   C |   180 | 20.1 |        
   53368 | 2025-05-01 08:19:02 |         MASTER-OAFA | (15h 32m 22.96s , -17d 44m 53.1s) |   C |   180 | 19.9 |        
   54679 | 2025-05-01 08:40:53 |         MASTER-OAFA | (15h 32m 25.05s , -17d 42m 48.8s) |   C |   180 | 20.2 |        
   74970 | 2025-05-01 14:19:49 |        MASTER-Tunka | (15h 33m 39.06s , -18d 15m 25.1s) |   C |    90 | 17.2 |        
   76268 | 2025-05-01 14:40:43 |        MASTER-Tunka | (15h 33m 44.79s , -18d 13m 13.8s) |   C |   180 | 17.7 |        
   77537 | 2025-05-01 15:01:52 |        MASTER-Tunka | (15h 33m 41.68s , -18d 12m 04.7s) |   C |   180 | 17.9 |        
   77537 | 2025-05-01 15:01:52 |             MASTER- | (15h 33m 45.00s , -18d 23m 28.6s) |   C |   180 | 17.8 |        
   78796 | 2025-05-01 15:22:50 |        MASTER-Tunka | (15h 33m 37.37s , -18d 12m 26.4s) |   C |   180 | 17.8 |        
   78796 | 2025-05-01 15:22:50 |             MASTER- | (15h 33m 41.37s , -18d 23m 54.3s) |   C |   180 | 17.9 |        
   80055 | 2025-05-01 15:43:49 |        MASTER-Tunka | (15h 33m 38.06s , -18d 09m 18.0s) |   C |   180 | 18.2 |        
   80055 | 2025-05-01 15:43:49 |             MASTER- | (15h 33m 42.77s , -18d 20m 48.0s) |   C |   180 | 18.1 |        
   81265 | 2025-05-01 16:03:59 |        MASTER-Tunka | (15h 33m 41.22s , -18d 09m 51.5s) |   C |   180 | 17.3 |        
   81265 | 2025-05-01 16:03:59 |             MASTER- | (15h 33m 46.48s , -18d 21m 24.4s) |   C |   180 | 17.0 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 12479
TYPE = 35
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the EP250430a ( EP Team et al., GCN 40299) errorbox 1288 sec after trigger time at 2025-04-30 17:52:33 UT, with upper limit up to  19.8 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -23.9 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the EP250430a errorbox 22475 sec after trigger time at 2025-04-30 23:45:40 UT, with upper limit up to  20.6 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -23.3 deg. 

The galactic latitude b = 29 deg., longitude l = 349 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858517

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    1379 | 2025-04-30 17:52:33 |         MASTER-SAAO | (15h 29m 47.13s , -17d 57m 49.8s) |   C |   180 | 17.5 |        
    1499 | 2025-04-30 17:52:33 |         MASTER-SAAO | (15h 29m 47.14s , -17d 57m 49.7s) |   C |   420 | 18.5 |  Coadd 
    1578 | 2025-04-30 17:55:53 |         MASTER-SAAO | (15h 29m 54.09s , -17d 58m 47.9s) |   C |   180 | 18.2 |        
    1726 | 2025-04-30 17:59:20 |         MASTER-SAAO | (15h 29m 42.85s , -18d 01m 47.2s) |   C |    60 | 17.8 |        
    1805 | 2025-04-30 18:00:40 |         MASTER-SAAO | (15h 29m 42.79s , -18d 01m 47.5s) |   C |    60 | 17.9 |        
    1865 | 2025-04-30 18:00:40 |         MASTER-SAAO | (15h 29m 42.78s , -18d 01m 47.5s) |   C |   180 | 18.6 |  Coadd 
    1884 | 2025-04-30 18:01:59 |         MASTER-SAAO | (15h 29m 42.74s , -18d 01m 47.9s) |   C |    60 | 17.9 |        
    1964 | 2025-04-30 18:03:18 |         MASTER-SAAO | (15h 29m 42.67s , -18d 01m 47.9s) |   C |    60 | 18.0 |        
    2043 | 2025-04-30 18:04:37 |         MASTER-SAAO | (15h 29m 42.57s , -18d 01m 48.6s) |   C |    60 | 18.1 |        
    2103 | 2025-04-30 18:04:37 |         MASTER-SAAO | (15h 29m 42.57s , -18d 01m 48.6s) |   C |   180 | 18.7 |  Coadd 
    2122 | 2025-04-30 18:05:56 |         MASTER-SAAO | (15h 29m 42.48s , -18d 01m 49.5s) |   C |    60 | 18.0 |        
    2201 | 2025-04-30 18:07:16 |         MASTER-SAAO | (15h 29m 42.40s , -18d 01m 50.0s) |   C |    60 | 18.0 |        
    2280 | 2025-04-30 18:08:35 |         MASTER-SAAO | (15h 29m 42.38s , -18d 01m 50.2s) |   C |    60 | 18.0 |        
    2340 | 2025-04-30 18:08:35 |         MASTER-SAAO | (15h 29m 42.37s , -18d 01m 50.2s) |   C |   180 | 18.5 |  Coadd 
    2360 | 2025-04-30 18:09:54 |         MASTER-SAAO | (15h 29m 42.27s , -18d 01m 50.9s) |   C |    60 | 17.8 |        
    2438 | 2025-04-30 18:11:13 |         MASTER-SAAO | (15h 29m 42.19s , -18d 01m 51.5s) |   C |    60 | 17.8 |        
    2517 | 2025-04-30 18:12:32 |         MASTER-SAAO | (15h 29m 42.15s , -18d 01m 51.7s) |   C |    60 | 17.7 |        
    2577 | 2025-04-30 18:12:32 |         MASTER-SAAO | (15h 29m 42.15s , -18d 01m 51.7s) |   C |   180 | 18.4 |  Coadd 
    2597 | 2025-04-30 18:13:51 |         MASTER-SAAO | (15h 29m 42.04s , -18d 01m 52.7s) |   C |    60 | 17.7 |        
    2676 | 2025-04-30 18:15:10 |         MASTER-SAAO | (15h 29m 41.95s , -18d 01m 52.8s) |   C |    60 | 17.7 |        
    2755 | 2025-04-30 18:16:29 |         MASTER-SAAO | (15h 29m 41.94s , -18d 01m 53.3s) |   C |    60 | 17.4 |        
    2815 | 2025-04-30 18:16:29 |         MASTER-SAAO | (15h 29m 41.94s , -18d 01m 53.3s) |   C |   180 | 18.3 |  Coadd 
    2834 | 2025-04-30 18:17:49 |         MASTER-SAAO | (15h 29m 41.89s , -18d 01m 53.5s) |   C |    60 | 17.5 |        
    2913 | 2025-04-30 18:19:08 |         MASTER-SAAO | (15h 29m 41.92s , -18d 01m 53.5s) |   C |    60 | 17.3 |        
    2992 | 2025-04-30 18:20:27 |         MASTER-SAAO | (15h 29m 41.80s , -18d 01m 54.7s) |   C |    60 | 17.5 |        
    3071 | 2025-04-30 18:21:46 |         MASTER-SAAO | (15h 29m 41.70s , -18d 01m 54.8s) |   C |    60 | 17.7 |        
    3150 | 2025-04-30 18:23:05 |         MASTER-SAAO | (15h 29m 41.50s , -18d 01m 56.5s) |   C |    60 | 17.9 |        
    3229 | 2025-04-30 18:24:24 |         MASTER-SAAO | (15h 29m 41.50s , -18d 01m 56.9s) |   C |    60 | 17.9 |        
    3289 | 2025-04-30 18:24:24 |         MASTER-SAAO | (15h 29m 41.50s , -18d 01m 56.9s) |   C |   180 | 18.6 |  Coadd 
    3308 | 2025-04-30 18:25:43 |         MASTER-SAAO | (15h 29m 41.38s , -18d 01m 57.7s) |   C |    60 | 17.9 |        
    3387 | 2025-04-30 18:27:02 |         MASTER-SAAO | (15h 29m 41.20s , -18d 01m 59.5s) |   C |    60 | 17.9 |        
    3466 | 2025-04-30 18:28:21 |         MASTER-SAAO | (15h 29m 41.12s , -18d 02m 00.7s) |   C |    60 | 17.8 |        
    3526 | 2025-04-30 18:28:21 |         MASTER-SAAO | (15h 29m 41.11s , -18d 02m 00.8s) |   C |   180 | 18.6 |  Coadd 
    3546 | 2025-04-30 18:29:40 |         MASTER-SAAO | (15h 29m 40.96s , -18d 02m 01.0s) |   C |    60 | 17.9 |        
    4116 | 2025-04-30 18:29:40 |         MASTER-SAAO | (15h 29m 40.97s , -18d 02m 01.0s) |   C |  1200 | 19.6 |  Coadd 
    3625 | 2025-04-30 18:30:59 |         MASTER-SAAO | (15h 29m 40.88s , -18d 02m 02.3s) |   C |    60 | 18.0 |        
    3704 | 2025-04-30 18:32:19 |         MASTER-SAAO | (15h 29m 40.80s , -18d 02m 03.3s) |   C |    60 | 18.1 |        
    3764 | 2025-04-30 18:32:19 |         MASTER-SAAO | (15h 29m 40.81s , -18d 02m 03.3s) |   C |   180 | 18.7 |  Coadd 
    3783 | 2025-04-30 18:33:37 |         MASTER-SAAO | (15h 29m 40.68s , -18d 02m 04.5s) |   C |    60 | 18.1 |        
    3862 | 2025-04-30 18:34:57 |         MASTER-SAAO | (15h 29m 40.57s , -18d 02m 06.1s) |   C |    60 | 18.1 |        
    3941 | 2025-04-30 18:36:16 |         MASTER-SAAO | (15h 29m 40.43s , -18d 02m 07.2s) |   C |    60 | 17.9 |        
    4001 | 2025-04-30 18:36:16 |         MASTER-SAAO | (15h 29m 40.43s , -18d 02m 07.2s) |   C |   180 | 18.7 |  Coadd 
    4020 | 2025-04-30 18:37:35 |         MASTER-SAAO | (15h 29m 40.27s , -18d 02m 08.1s) |   C |    60 | 18.1 |        
    4179 | 2025-04-30 18:40:13 |         MASTER-SAAO | (15h 29m 40.09s , -18d 02m 09.6s) |   C |    60 | 18.0 |        
    4257 | 2025-04-30 18:41:32 |         MASTER-SAAO | (15h 29m 40.01s , -18d 02m 10.7s) |   C |    60 | 17.9 |        
    4317 | 2025-04-30 18:41:32 |         MASTER-SAAO | (15h 29m 40.00s , -18d 02m 10.7s) |   C |   180 | 18.6 |  Coadd 
    4336 | 2025-04-30 18:42:51 |         MASTER-SAAO | (15h 29m 39.93s , -18d 02m 11.1s) |   C |    60 | 17.9 |        
    4415 | 2025-04-30 18:44:10 |         MASTER-SAAO | (15h 29m 39.80s , -18d 02m 11.6s) |   C |    60 | 18.0 |        
    4494 | 2025-04-30 18:45:29 |         MASTER-SAAO | (15h 29m 39.75s , -18d 02m 12.2s) |   C |    60 | 17.8 |        
    4554 | 2025-04-30 18:45:29 |         MASTER-SAAO | (15h 29m 39.75s , -18d 02m 12.2s) |   C |   180 | 18.4 |  Coadd 
    4573 | 2025-04-30 18:46:48 |         MASTER-SAAO | (15h 29m 39.62s , -18d 02m 12.9s) |   C |    60 | 18.0 |        
    4652 | 2025-04-30 18:48:07 |         MASTER-SAAO | (15h 29m 39.47s , -18d 02m 13.3s) |   C |    60 | 17.9 |        
    4731 | 2025-04-30 18:49:26 |         MASTER-SAAO | (15h 29m 39.42s , -18d 02m 14.5s) |   C |    60 | 18.0 |        
    4791 | 2025-04-30 18:49:26 |         MASTER-SAAO | (15h 29m 39.42s , -18d 02m 14.5s) |   C |   180 | 18.7 |  Coadd 
    4810 | 2025-04-30 18:50:45 |         MASTER-SAAO | (15h 29m 39.33s , -18d 02m 15.2s) |   C |    60 | 18.1 |        
    4889 | 2025-04-30 18:52:04 |         MASTER-SAAO | (15h 29m 39.28s , -18d 02m 15.9s) |   C |    60 | 17.9 |        
    4968 | 2025-04-30 18:53:22 |         MASTER-SAAO | (15h 29m 39.14s , -18d 02m 16.9s) |   C |    60 | 18.0 |        
    5028 | 2025-04-30 18:53:22 |         MASTER-SAAO | (15h 29m 39.15s , -18d 02m 16.9s) |   C |   180 | 18.7 |  Coadd 
    5047 | 2025-04-30 18:54:41 |         MASTER-SAAO | (15h 29m 39.05s , -18d 02m 17.4s) |   C |    60 | 17.9 |        
    5126 | 2025-04-30 18:56:00 |         MASTER-SAAO | (15h 29m 38.90s , -18d 02m 19.2s) |   C |    60 | 18.1 |        
    5205 | 2025-04-30 18:57:19 |         MASTER-SAAO | (15h 29m 38.76s , -18d 02m 20.1s) |   C |    60 | 18.1 |        
    5265 | 2025-04-30 18:57:19 |         MASTER-SAAO | (15h 29m 38.76s , -18d 02m 20.2s) |   C |   180 | 18.6 |  Coadd 
    5355 | 2025-04-30 18:57:19 |         MASTER-SAAO | (15h 29m 38.78s , -18d 02m 20.2s) |   C |   360 | 19.0 |  Coadd 
    5284 | 2025-04-30 18:58:38 |         MASTER-SAAO | (15h 29m 38.65s , -18d 02m 21.5s) |   C |    60 | 17.9 |        
    5363 | 2025-04-30 18:59:57 |         MASTER-SAAO | (15h 29m 38.52s , -18d 02m 21.9s) |   C |    60 | 17.9 |        
    5442 | 2025-04-30 19:01:16 |         MASTER-SAAO | (15h 29m 38.37s , -18d 02m 22.9s) |   C |    60 | 17.9 |        
    5502 | 2025-04-30 19:01:16 |         MASTER-SAAO | (15h 29m 38.38s , -18d 02m 22.9s) |   C |   180 | 18.3 |  Coadd 
    5521 | 2025-04-30 19:02:35 |         MASTER-SAAO | (15h 29m 38.20s , -18d 02m 23.9s) |   C |    60 | 18.0 |        
    5601 | 2025-04-30 19:03:55 |         MASTER-SAAO | (15h 29m 38.12s , -18d 02m 24.6s) |   C |    60 | 14.5 |        
    9541 | 2025-04-30 20:08:36 |         MASTER-SAAO | (15h 29m 38.05s , -17d 58m 45.0s) |   C |   180 | 19.4 |        
    9721 | 2025-04-30 20:08:36 |         MASTER-SAAO | (15h 29m 38.05s , -17d 58m 45.0s) |   C |   540 | 19.4 |  Coadd 
    9741 | 2025-04-30 20:11:56 |         MASTER-SAAO | (15h 29m 43.77s , -17d 59m 43.6s) |   C |   180 | 18.6 |        
    9941 | 2025-04-30 20:15:15 |         MASTER-SAAO | (15h 29m 37.33s , -18d 00m 43.5s) |   C |   180 | 17.5 |        
   12416 | 2025-04-30 20:56:31 |         MASTER-SAAO | (15h 32m 05.29s , -18d 14m 46.4s) |   C |   180 | 18.8 |        
   12616 | 2025-04-30 20:59:50 |         MASTER-SAAO | (15h 32m 10.04s , -18d 15m 42.1s) |   C |   180 | 18.3 |        
   15018 | 2025-04-30 21:39:53 |         MASTER-SAAO | (15h 32m 02.57s , -18d 14m 19.3s) |   C |   180 | 19.0 |        
   15198 | 2025-04-30 21:39:53 |         MASTER-SAAO | (15h 32m 02.57s , -18d 14m 19.3s) |   C |   540 | 19.8 |  Coadd 
   15217 | 2025-04-30 21:43:12 |         MASTER-SAAO | (15h 32m 08.65s , -18d 15m 14.4s) |   C |   180 | 18.7 |        
   15417 | 2025-04-30 21:46:31 |         MASTER-SAAO | (15h 32m 01.07s , -18d 16m 10.2s) |   C |   180 | 19.6 |        
   15616 | 2025-04-30 21:49:50 |         MASTER-SAAO | (15h 32m 07.90s , -18d 16m 06.4s) |   C |   180 | 19.5 |        
   17303 | 2025-04-30 22:17:57 |         MASTER-SAAO | (15h 31m 56.79s , -18d 13m 51.8s) |   C |   180 | 19.6 |        
   18562 | 2025-04-30 22:38:57 |         MASTER-SAAO | (15h 32m 09.12s , -18d 15m 24.1s) |   C |   180 | 18.2 |        
   19866 | 2025-04-30 23:00:40 |         MASTER-SAAO | (15h 32m 17.87s , -18d 13m 14.7s) |   C |   180 | 18.3 |        
   22566 | 2025-04-30 23:45:40 |         MASTER-OAFA | (15h 34m 14.55s , -18d 12m 11.5s) |   C |   180 | 17.1 |        
   22699 | 2025-04-30 23:47:54 |         MASTER-SAAO | (15h 32m 38.08s , -18d 12m 13.5s) |   C |   180 | 18.7 |        
   22761 | 2025-04-30 23:48:55 |         MASTER-OAFA | (15h 34m 20.34s , -18d 12m 59.8s) |   C |   180 | 17.5 |        
   22954 | 2025-04-30 23:52:09 |         MASTER-OAFA | (15h 34m 14.62s , -18d 13m 48.0s) |   C |   180 | 17.7 |        
   23150 | 2025-04-30 23:55:25 |         MASTER-OAFA | (15h 34m 20.73s , -18d 13m 22.5s) |   C |   180 | 18.0 |        
   23350 | 2025-04-30 23:58:44 |         MASTER-OAFA | (15h 34m 17.16s , -18d 11m 41.0s) |   C |   180 | 18.3 |        
   23911 | 2025-05-01 00:08:05 |         MASTER-OAFA | (15h 34m 17.13s , -18d 12m 41.7s) |   C |   180 | 18.1 |        
   24105 | 2025-05-01 00:11:19 |         MASTER-OAFA | (15h 34m 19.00s , -18d 10m 50.1s) |   C |   180 | 18.2 |        
   25372 | 2025-05-01 00:32:27 |         MASTER-OAFA | (15h 34m 20.63s , -18d 11m 51.4s) |   C |   180 | 18.1 |        
   27840 | 2025-05-01 01:13:35 |         MASTER-OAFA | (15h 34m 20.29s , -18d 10m 08.4s) |   C |   180 | 16.5 |        
   29077 | 2025-05-01 01:34:11 |         MASTER-OAFA | (15h 34m 20.66s , -18d 08m 34.8s) |   C |   180 | 19.5 |        
   30330 | 2025-05-01 01:55:04 |         MASTER-OAFA | (15h 34m 14.37s , -18d 06m 06.1s) |   C |   180 | 19.9 |        
   31271 | 2025-05-01 02:10:46 |         MASTER-SAAO | (15h 32m 54.28s , -18d 08m 04.6s) |   C |   180 | 18.7 |        
   31574 | 2025-05-01 02:15:49 |         MASTER-OAFA | (15h 34m 16.54s , -18d 07m 03.4s) |   C |   180 | 19.9 |        
   32855 | 2025-05-01 02:37:10 |         MASTER-OAFA | (15h 34m 12.25s , -18d 07m 12.6s) |   C |   180 | 19.0 |        
   34422 | 2025-05-01 03:03:17 |         MASTER-OAFA | (15h 34m 11.99s , -18d 04m 14.6s) |   C |   180 | 19.8 |        
   34960 | 2025-05-01 03:12:14 |         MASTER-SAAO | (15h 32m 36.46s , -18d 05m 30.8s) |   C |   180 | 16.7 |        
   35668 | 2025-05-01 03:24:02 |         MASTER-OAFA | (15h 34m 14.24s , -18d 04m 14.8s) |   C |   180 | 19.9 |        
   36887 | 2025-05-01 03:44:22 |         MASTER-OAFA | (15h 34m 09.64s , -18d 05m 37.0s) |   C |   180 | 19.7 |        
   36976 | 2025-05-01 03:45:50 |         MASTER-SAAO | (15h 32m 34.07s , -18d 04m 13.3s) |   C |   180 | 15.6 |        
   38181 | 2025-05-01 04:05:56 |         MASTER-OAFA | (15h 32m 14.05s , -17d 47m 40.1s) |   C |   180 | 19.9 |        
   39409 | 2025-05-01 04:26:23 |         MASTER-OAFA | (15h 32m 21.41s , -17d 47m 09.0s) |   C |   180 | 19.8 |        
   40653 | 2025-05-01 04:47:08 |         MASTER-OAFA | (15h 32m 19.99s , -17d 46m 48.3s) |   C |   180 | 20.4 |        
   41892 | 2025-05-01 05:07:47 |         MASTER-OAFA | (15h 32m 17.36s , -17d 47m 48.8s) |   C |   180 | 19.9 |        
   43370 | 2025-05-01 05:32:24 |         MASTER-OAFA | (15h 32m 25.07s , -17d 47m 22.9s) |   C |   180 | 19.7 |        
   44620 | 2025-05-01 05:53:15 |         MASTER-OAFA | (15h 32m 25.34s , -17d 45m 34.7s) |   C |   180 | 20.2 |        
   45893 | 2025-05-01 06:14:27 |         MASTER-OAFA | (15h 32m 21.25s , -17d 45m 05.7s) |   C |   180 | 20.6 |        
   47128 | 2025-05-01 06:35:03 |         MASTER-OAFA | (15h 32m 24.27s , -17d 45m 19.3s) |   C |   180 | 20.3 |        
   48355 | 2025-05-01 06:55:29 |         MASTER-OAFA | (15h 32m 28.06s , -17d 45m 10.4s) |   C |   180 | 19.7 |        
   49663 | 2025-05-01 07:17:17 |         MASTER-OAFA | (15h 32m 22.99s , -17d 45m 11.4s) |   C |   180 | 19.8 |        
   50890 | 2025-05-01 07:37:45 |         MASTER-OAFA | (15h 32m 21.89s , -17d 42m 58.8s) |   C |   180 | 19.8 |        
   52128 | 2025-05-01 07:58:23 |         MASTER-OAFA | (15h 32m 28.26s , -17d 43m 14.2s) |   C |   180 | 20.1 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 12478
TYPE = 35
DAYS = 0.5


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB 250430A ( T. M. Parsotan et al., GCN 40292) errorbox  1266 sec after notice time and 1293 sec after trigger time at 2025-04-30 17:52:33 UT, with upper limit up to  19.8 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -23.9 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 250430A errorbox  22453 sec after notice time and 22480 sec after trigger time at 2025-04-30 23:45:40 UT, with upper limit up to  20.4 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -23.3 deg. 

The galactic latitude b = 29 deg., longitude l = 349 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858282

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

    1384 |         MASTER-SAAO |   C |   180 | 17.5 |        
    1504 |         MASTER-SAAO |   C |   420 | 18.5 |  Coadd 
    1583 |         MASTER-SAAO |   C |   180 | 18.2 |        
    1731 |         MASTER-SAAO |   C |    60 | 17.8 |        
    1810 |         MASTER-SAAO |   C |    60 | 17.9 |        
    1870 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    1889 |         MASTER-SAAO |   C |    60 | 17.9 |        
    1968 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2048 |         MASTER-SAAO |   C |    60 | 18.1 |        
    2108 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    2127 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2206 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2285 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2345 |         MASTER-SAAO |   C |   180 | 18.5 |  Coadd 
    2364 |         MASTER-SAAO |   C |    60 | 17.8 |        
    2443 |         MASTER-SAAO |   C |    60 | 17.8 |        
    2522 |         MASTER-SAAO |   C |    60 | 17.7 |        
    2582 |         MASTER-SAAO |   C |   180 | 18.4 |  Coadd 
    2601 |         MASTER-SAAO |   C |    60 | 17.7 |        
    2680 |         MASTER-SAAO |   C |    60 | 17.7 |        
    2760 |         MASTER-SAAO |   C |    60 | 17.4 |        
    2820 |         MASTER-SAAO |   C |   180 | 18.3 |  Coadd 
    2839 |         MASTER-SAAO |   C |    60 | 17.5 |        
    2918 |         MASTER-SAAO |   C |    60 | 17.3 |        
    2997 |         MASTER-SAAO |   C |    60 | 17.5 |        
    3076 |         MASTER-SAAO |   C |    60 | 17.7 |        
    3155 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3234 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3294 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    3313 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3392 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3471 |         MASTER-SAAO |   C |    60 | 17.8 |        
    3531 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    3550 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4120 |         MASTER-SAAO |   C |  1200 | 19.6 |  Coadd 
    3630 |         MASTER-SAAO |   C |    60 | 18.0 |        
    3709 |         MASTER-SAAO |   C |    60 | 18.1 |        
    3769 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    3788 |         MASTER-SAAO |   C |    60 | 18.1 |        
    3867 |         MASTER-SAAO |   C |    60 | 18.1 |        
    3946 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4006 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    4025 |         MASTER-SAAO |   C |    60 | 18.1 |        
    4183 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4262 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4322 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    4341 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4420 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4499 |         MASTER-SAAO |   C |    60 | 17.8 |        
    4559 |         MASTER-SAAO |   C |   180 | 18.4 |  Coadd 
    4578 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4657 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4736 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4796 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    4815 |         MASTER-SAAO |   C |    60 | 18.1 |        
    4894 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4973 |         MASTER-SAAO |   C |    60 | 18.0 |        
    5033 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    5051 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5130 |         MASTER-SAAO |   C |    60 | 18.1 |        
    5209 |         MASTER-SAAO |   C |    60 | 18.1 |        
    5269 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    5359 |         MASTER-SAAO |   C |   360 | 19.0 |  Coadd 
    5289 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5367 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5447 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5507 |         MASTER-SAAO |   C |   180 | 18.3 |  Coadd 
    5525 |         MASTER-SAAO |   C |    60 | 18.0 |        
    5606 |         MASTER-SAAO |   C |    60 | 14.5 |        
    9546 |         MASTER-SAAO |   C |   180 | 19.4 |        
    9726 |         MASTER-SAAO |   C |   540 | 19.4 |  Coadd 
    9746 |         MASTER-SAAO |   C |   180 | 18.6 |        
    9945 |         MASTER-SAAO |   C |   180 | 17.5 |        
   12421 |         MASTER-SAAO |   C |   180 | 18.8 |        
   12620 |         MASTER-SAAO |   C |   180 | 18.3 |        
   15023 |         MASTER-SAAO |   C |   180 | 19.0 |        
   15203 |         MASTER-SAAO |   C |   540 | 19.8 |  Coadd 
   15222 |         MASTER-SAAO |   C |   180 | 18.7 |        
   15421 |         MASTER-SAAO |   C |   180 | 19.6 |        
   15621 |         MASTER-SAAO |   C |   180 | 19.5 |        
   17307 |         MASTER-SAAO |   C |   180 | 19.6 |        
   18567 |         MASTER-SAAO |   C |   180 | 18.2 |        
   19870 |         MASTER-SAAO |   C |   180 | 18.3 |        
   22571 |         MASTER-OAFA |   C |   180 | 17.1 |        
   22704 |         MASTER-SAAO |   C |   180 | 18.7 |        
   22766 |         MASTER-OAFA |   C |   180 | 17.5 |        
   22959 |         MASTER-OAFA |   C |   180 | 17.7 |        
   23155 |         MASTER-OAFA |   C |   180 | 18.0 |        
   23354 |         MASTER-OAFA |   C |   180 | 18.3 |        
   23916 |         MASTER-OAFA |   C |   180 | 18.1 |        
   24110 |         MASTER-OAFA |   C |   180 | 18.2 |        
   25377 |         MASTER-OAFA |   C |   180 | 18.1 |        
   27845 |         MASTER-OAFA |   C |   180 | 16.5 |        
   29081 |         MASTER-OAFA |   C |   180 | 19.5 |        
   30334 |         MASTER-OAFA |   C |   180 | 19.9 |        
   31276 |         MASTER-SAAO |   C |   180 | 18.7 |        
   31579 |         MASTER-OAFA |   C |   180 | 19.9 |        
   32860 |         MASTER-OAFA |   C |   180 | 19.0 |        
   34427 |         MASTER-OAFA |   C |   180 | 19.8 |        
   34964 |         MASTER-SAAO |   C |   180 | 16.7 |        
   35672 |         MASTER-OAFA |   C |   180 | 19.9 |        
   36892 |         MASTER-OAFA |   C |   180 | 19.7 |        
   36981 |         MASTER-SAAO |   C |   180 | 15.6 |        
   38186 |         MASTER-OAFA |   C |   180 | 19.9 |        
   39414 |         MASTER-OAFA |   C |   180 | 19.8 |        
   40658 |         MASTER-OAFA |   C |   180 | 20.4 |        
   41897 |         MASTER-OAFA |   C |   180 | 19.9 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 12477
TYPE = 35
DAYS = 0.1


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB 250430A ( T. M. Parsotan et al., GCN 40292) errorbox  1266 sec after notice time and 1293 sec after trigger time at 2025-04-30 17:52:33 UT, with upper limit up to  19.6 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -23.9 deg. 

The galactic latitude b = 29 deg., longitude l = 349 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858282

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

    1384 |         MASTER-SAAO |   C |   180 | 17.5 |        
    1504 |         MASTER-SAAO |   C |   420 | 18.5 |  Coadd 
    1583 |         MASTER-SAAO |   C |   180 | 18.2 |        
    1731 |         MASTER-SAAO |   C |    60 | 17.8 |        
    1810 |         MASTER-SAAO |   C |    60 | 17.9 |        
    1870 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    1889 |         MASTER-SAAO |   C |    60 | 17.9 |        
    1968 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2048 |         MASTER-SAAO |   C |    60 | 18.1 |        
    2108 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    2127 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2206 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2285 |         MASTER-SAAO |   C |    60 | 18.0 |        
    2345 |         MASTER-SAAO |   C |   180 | 18.5 |  Coadd 
    2364 |         MASTER-SAAO |   C |    60 | 17.8 |        
    2443 |         MASTER-SAAO |   C |    60 | 17.8 |        
    2522 |         MASTER-SAAO |   C |    60 | 17.7 |        
    2582 |         MASTER-SAAO |   C |   180 | 18.4 |  Coadd 
    2601 |         MASTER-SAAO |   C |    60 | 17.7 |        
    2680 |         MASTER-SAAO |   C |    60 | 17.7 |        
    2760 |         MASTER-SAAO |   C |    60 | 17.4 |        
    2820 |         MASTER-SAAO |   C |   180 | 18.3 |  Coadd 
    2839 |         MASTER-SAAO |   C |    60 | 17.5 |        
    2918 |         MASTER-SAAO |   C |    60 | 17.3 |        
    2997 |         MASTER-SAAO |   C |    60 | 17.5 |        
    3076 |         MASTER-SAAO |   C |    60 | 17.7 |        
    3155 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3234 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3294 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    3313 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3392 |         MASTER-SAAO |   C |    60 | 17.9 |        
    3471 |         MASTER-SAAO |   C |    60 | 17.8 |        
    3531 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    3550 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4120 |         MASTER-SAAO |   C |  1200 | 19.6 |  Coadd 
    3630 |         MASTER-SAAO |   C |    60 | 18.0 |        
    3709 |         MASTER-SAAO |   C |    60 | 18.1 |        
    3769 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    3788 |         MASTER-SAAO |   C |    60 | 18.1 |        
    3867 |         MASTER-SAAO |   C |    60 | 18.1 |        
    3946 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4006 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    4025 |         MASTER-SAAO |   C |    60 | 18.1 |        
    4183 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4262 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4322 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    4341 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4420 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4499 |         MASTER-SAAO |   C |    60 | 17.8 |        
    4559 |         MASTER-SAAO |   C |   180 | 18.4 |  Coadd 
    4578 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4657 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4736 |         MASTER-SAAO |   C |    60 | 18.0 |        
    4796 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    4815 |         MASTER-SAAO |   C |    60 | 18.1 |        
    4894 |         MASTER-SAAO |   C |    60 | 17.9 |        
    4973 |         MASTER-SAAO |   C |    60 | 18.0 |        
    5033 |         MASTER-SAAO |   C |   180 | 18.7 |  Coadd 
    5051 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5130 |         MASTER-SAAO |   C |    60 | 18.1 |        
    5209 |         MASTER-SAAO |   C |    60 | 18.1 |        
    5269 |         MASTER-SAAO |   C |   180 | 18.6 |  Coadd 
    5359 |         MASTER-SAAO |   C |   360 | 19.0 |  Coadd 
    5289 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5367 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5447 |         MASTER-SAAO |   C |    60 | 17.9 |        
    5507 |         MASTER-SAAO |   C |   180 | 18.3 |  Coadd 
    5525 |         MASTER-SAAO |   C |    60 | 18.0 |        
    5606 |         MASTER-SAAO |   C |    60 | 14.5 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 12476
TYPE = 35
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB250430.73 (trigger No 1308754,15h 33m 42.72s , -18d 04m 58.8s, R=0.05) errorbox  1266 sec after notice time and 1293 sec after trigger time at 2025-04-30 17:52:33 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -23.9 deg. 

The galactic latitude b = 29 deg., longitude l = 349 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858290

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

    1384 |         MASTER-SAAO |   C |   180 | 17.5 |        
    1583 |         MASTER-SAAO |   C |   180 | 18.2 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 12475
TYPE = 35
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB250430.73 (trigger No 1308754,15h 33m 42.72s , -18d 04m 58.8s, R=0.05) errorbox  1266 sec after notice time and 1293 sec after trigger time at 2025-04-30 17:52:33 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -23.9 deg. 

The galactic latitude b = 29 deg., longitude l = 349 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858290

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

    1384 |         MASTER-SAAO |   C |   180 | 17.5 |        
    1583 |         MASTER-SAAO |   C |   180 | 18.2 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 12474
TYPE = 34
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB250430.73 (trigger No 1308754,15h 33m 42.72s , -18d 04m 58.8s, R=0.05) errorbox  1266 sec after notice time and 1293 sec after trigger time at 2025-04-30 17:52:33 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -23.9 deg. 

The galactic latitude b = 29 deg., longitude l = 349 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858290

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

    1384 |         MASTER-SAAO |   C |   180 | 17.5 |        
    1583 |         MASTER-SAAO |   C |   180 | 18.2 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.

MASTER, 2002-2025