MASTER Net MASTER Database: GRB250502.43 page

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

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


Name FERMI GRB250502.43
Trignum 767873638
Trigger time 2025-05-02 10:13:53.17
Notice time 2025-05-02 10:23:48.948637
Coord, eb (20h 49m 02.40s , +14d 31m 48.0s) , 2.28
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)

All alerts for this trigger
id noticetime coord2000 satel errorbox type trigger seq trig_type links
2858681 2025-05-02 10:23:48.948637 20h 49m 02.40s +14d 31m 48.0s FERMI 2.28 alert 767873638 1 115 alert
2858672 2025-05-02 10:16:50.985808 20h 53m 48.00s +13d 46m 48.0s FERMI 1.49 alert 767873638 4 112 alert
2858642 2025-05-02 10:14:57.689609 20h 49m 24.00s +08d 00m 00.0s FERMI 9.7833 alert 767873638 10 111 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory camera links
49.4 2025-05-02 10:13:51.007 00h 00m 00.00s +00d 00m 00.0s OAFA 111342 Database OAFA
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2025-05-02 10:13:53 (JD 2460797.926308)

Siderial time 3.444823 h

Ra 20:49:02.40 Dec 14:31:48.00
(312.260000d, 14.530000d)

Rise 2025-05-02 23:00:37

Transit 2025-05-02 06:37:19

Set 2025-05-02 14:10:05

Amur

Object: Altitude: -24.64 Azimuth: 189.89

Sun: Altitude: 4.36 Azimuth: 109.01

Moon: Altitude: 55.36 Azimuth: 61.48

Tunka

Object: Altitude: -22.37 Azimuth: 164.13

Sun: Altitude: 19.66 Azimuth: 90.14

Moon: Altitude: 64.48 Azimuth: 20.55

Kislovodsk

Object: Altitude: 0.03 Azimuth: 110.29

Sun: Altitude: 58.15 Azimuth: 32.49

Moon: Altitude: 46.39 Azimuth: 274.68

Tavrida

Object: Altitude: 6.14 Azimuth: 104.40

Sun: Altitude: 59.80 Azimuth: 16.64

Moon: Altitude: 40.26 Azimuth: 269.46

SAAO

Object: Altitude: -1.67 Azimuth: 106.18

Sun: Altitude: 42.00 Azimuth: 185.99

Moon: Altitude: -1.16 Azimuth: 237.86

IAC

Object: Altitude: 45.94 Azimuth: 81.57

Sun: Altitude: 49.24 Azimuth: 279.34

Moon: Altitude: -2.66 Azimuth: 236.77

Argentina

Object: Altitude: 43.11 Azimuth: 190.01

Sun: Altitude: -12.00 Azimuth: 259.17

Moon: Altitude: -74.25 Azimuth: 281.82

Mexico

Object: Altitude: 42.68 Azimuth: 279.03

Sun: Altitude: -27.07 Azimuth: 229.00

Moon: Altitude: -27.36 Azimuth: 156.36

Ural

Object: Altitude: -3.64 Azimuth: 124.06

Sun: Altitude: 41.09 Azimuth: 45.85

Moon: Altitude: 51.98 Azimuth: 306.85

Vostryakovo

Object: Altitude: 6.59 Azimuth: 106.10

Sun: Altitude: 48.91 Azimuth: 18.34

Moon: Altitude: 41.65 Azimuth: 281.83

Gal. latitude: -18.323494 Gal. longitude: 60.991884

Dist. to Sun: 83.568007

Dist. to Moon: 131.603883

Moon coord.: (107.313798 d, 27.382134 d)

Sun coord.: (39.475434 d, 15.415192 d)

Lunar disk: 0.278404

Lunar phase: 116.307769

Lunar bright limb: 274.443817

No SN in this field

2025-05-02 10:23:48 (JD 2460797.933194)

Siderial time 3.610553 h

Ra 20:49:02.40 Dec 14:31:48.00
(312.260000d, 14.530000d)

Rise 2025-05-02 23:00:37

Transit 2025-05-02 06:37:19

Set 2025-05-02 14:10:05

Amur

Object: Altitude: -24.33 Azimuth: 192.51

Sun: Altitude: 2.87 Azimuth: 110.88

Moon: Altitude: 54.00 Azimuth: 64.27

Tunka

Object: Altitude: -22.75 Azimuth: 166.71

Sun: Altitude: 18.13 Azimuth: 92.08

Moon: Altitude: 63.90 Azimuth: 25.22

Kislovodsk

Object: Altitude: -1.64 Azimuth: 112.02

Sun: Altitude: 57.14 Azimuth: 36.54

Moon: Altitude: 48.09 Azimuth: 276.53

Tavrida

Object: Altitude: 4.44 Azimuth: 106.10

Sun: Altitude: 59.23 Azimuth: 21.22

Moon: Altitude: 41.94 Azimuth: 271.16

SAAO

Object: Altitude: -3.69 Azimuth: 104.88

Sun: Altitude: 42.16 Azimuth: 182.77

Moon: Altitude: 0.54 Azimuth: 236.61

IAC

Object: Altitude: 43.77 Azimuth: 83.04

Sun: Altitude: 51.39 Azimuth: 280.98

Moon: Altitude: -0.90 Azimuth: 237.95

Argentina

Object: Altitude: 43.42 Azimuth: 186.73

Sun: Altitude: -9.93 Azimuth: 257.94

Moon: Altitude: -72.25 Azimuth: 279.38

Mexico

Object: Altitude: 44.78 Azimuth: 280.66

Sun: Altitude: -25.44 Azimuth: 230.95

Moon: Altitude: -28.16 Azimuth: 158.57

Ural

Object: Altitude: -4.74 Azimuth: 126.20

Sun: Altitude: 40.10 Azimuth: 48.71

Moon: Altitude: 52.98 Azimuth: 309.91

Vostryakovo

Object: Altitude: 5.24 Azimuth: 108.10

Sun: Altitude: 48.43 Azimuth: 21.89

Moon: Altitude: 42.96 Azimuth: 284.07

Gal. latitude: -18.323494 Gal. longitude: 60.991884

Dist. to Sun: 83.573722

Dist. to Moon: 131.666764

Moon coord.: (107.419282 d, 27.368043 d)

Sun coord.: (39.482032 d, 15.417245 d)

Lunar disk: 0.279092

Lunar phase: 116.219804

Lunar bright limb: 274.494947

No SN in this field

2025-05-02 11:23:48 (JD 2460797.974861)

Siderial time 4.613291 h

Ra 20:49:02.40 Dec 14:31:48.00
(312.260000d, 14.530000d)

Rise 2025-05-02 23:00:37

Transit 2025-05-02 06:37:19

Set 2025-05-02 14:10:05

Amur

Object: Altitude: -21.01 Azimuth: 207.88

Sun: Altitude: -5.67 Azimuth: 122.57

Moon: Altitude: 45.22 Azimuth: 78.73

Tunka

Object: Altitude: -23.63 Azimuth: 182.52

Sun: Altitude: 8.97 Azimuth: 103.59

Moon: Altitude: 58.39 Azimuth: 49.38

Kislovodsk

Object: Altitude: -11.27 Azimuth: 123.02

Sun: Altitude: 49.23 Azimuth: 56.91

Moon: Altitude: 58.16 Azimuth: 289.79

Tavrida

Object: Altitude: -5.50 Azimuth: 116.76

Sun: Altitude: 53.36 Azimuth: 45.23

Moon: Altitude: 52.04 Azimuth: 282.76

SAAO

Object: Altitude: -16.15 Azimuth: 97.22

Sun: Altitude: 40.63 Azimuth: 163.57

Moon: Altitude: 10.25 Azimuth: 228.23

IAC

Object: Altitude: 30.56 Azimuth: 90.75

Sun: Altitude: 64.00 Azimuth: 294.49

Moon: Altitude: 10.17 Azimuth: 244.39

Argentina

Object: Altitude: 42.69 Azimuth: 166.79

Sun: Altitude: 2.31 Azimuth: 250.22

Moon: Altitude: -60.03 Azimuth: 269.75

Mexico

Object: Altitude: 57.12 Azimuth: 293.07

Sun: Altitude: -14.75 Azimuth: 241.34

Moon: Altitude: -31.30 Azimuth: 172.86

Ural

Object: Altitude: -10.73 Azimuth: 139.60

Sun: Altitude: 33.30 Azimuth: 64.67

Moon: Altitude: 57.91 Azimuth: 330.84

Vostryakovo

Object: Altitude: -2.54 Azimuth: 120.42

Sun: Altitude: 43.94 Azimuth: 41.81

Moon: Altitude: 50.48 Azimuth: 299.23

Gal. latitude: -18.323494 Gal. longitude: 60.991884

Dist. to Sun: 83.608300

Dist. to Moon: 132.045232

Moon coord.: (108.056398 d, 27.281174 d)

Sun coord.: (39.521954 d, 15.429660 d)

Lunar disk: 0.283264

Lunar phase: 115.688056

Lunar bright limb: 274.802990

No SN in this field

2025-05-05 14:09:00 (JD 2460801.089583)

Siderial time 7.571292 h

Ra 20:49:02.40 Dec 14:31:48.00
(312.260000d, 14.530000d)

Rise 2025-05-06 22:44:53

Transit 2025-05-06 06:21:35

Set 2025-05-06 13:54:22

Amur

Object: Altitude: -0.36 Azimuth: 246.38

Sun: Altitude: -21.26 Azimuth: 160.33

Moon: Altitude: 34.41 Azimuth: 70.38

Tunka

Object: Altitude: -12.29 Azimuth: 226.19

Sun: Altitude: -12.08 Azimuth: 137.51

Moon: Altitude: 46.44 Azimuth: 43.03

Kislovodsk

Object: Altitude: -30.38 Azimuth: 164.49

Sun: Altitude: 21.27 Azimuth: 92.60

Moon: Altitude: 50.72 Azimuth: 307.31

Tavrida

Object: Altitude: -27.37 Azimuth: 155.58

Sun: Altitude: 27.35 Azimuth: 86.18

Moon: Altitude: 45.07 Azimuth: 298.61

SAAO

Object: Altitude: -53.12 Azimuth: 69.50

Sun: Altitude: 18.84 Azimuth: 124.63

Moon: Altitude: 20.57 Azimuth: 235.64

IAC

Object: Altitude: -7.63 Azimuth: 111.08

Sun: Altitude: 70.34 Azimuth: 56.12

Moon: Altitude: 6.64 Azimuth: 256.57

Argentina

Object: Altitude: 20.31 Azimuth: 122.98

Sun: Altitude: 30.83 Azimuth: 220.93

Moon: Altitude: -52.56 Azimuth: 288.09

Mexico

Object: Altitude: 69.46 Azimuth: 39.43

Sun: Altitude: 19.31 Azimuth: 262.13

Moon: Altitude: -43.81 Azimuth: 174.21

Ural

Object: Altitude: -18.38 Azimuth: 183.30

Sun: Altitude: 12.06 Azimuth: 101.49

Moon: Altitude: 46.52 Azimuth: 339.57

Vostryakovo

Object: Altitude: -18.36 Azimuth: 161.12

Sun: Altitude: 24.00 Azimuth: 84.09

Moon: Altitude: 40.97 Azimuth: 311.02

Gal. latitude: -18.323494 Gal. longitude: 60.991884

Dist. to Sun: 86.192279

Dist. to Moon: 145.748971

Moon coord.: (149.889867 d, 14.952614 d)

Sun coord.: (42.516555 d, 16.336233 d)

Lunar disk: 0.603355

Lunar phase: 78.070437

Lunar bright limb: 290.692282

No SN in this field
Recent coverage and limits telegrams

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

  ID = 12492
TYPE = 35
DAYS = 2


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB 250502B ( Fermi GBM team, GCN 40314) errorbox  74 sec after notice time and 110 sec after trigger time at 2025-05-02 10:15:44 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 44 deg. The sun  altitude  is -11.2 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 250502B errorbox  56876 sec after notice time and 56912 sec after trigger time at 2025-05-03 02:02:25 UT, with upper limit up to  18.7 mag. The observations began at zenith distance = 60 deg. The sun  altitude  is -40.4 deg. 

The galactic latitude b = -20 deg., longitude l = 61 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858672

We obtain a following upper limits.  

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

     121 | 2025-05-02 10:15:44 |         MASTER-OAFA | (20h 40m 38.20s , +13d 02m 12.4s) |   C |    20 | 17.2 |        
     121 | 2025-05-02 10:15:44 |         MASTER-OAFA | (20h 49m 58.93s , +13d 25m 00.9s) |   C |    20 | 18.3 |        
     155 | 2025-05-02 10:16:23 |         MASTER-OAFA | (20h 40m 37.90s , +13d 02m 09.6s) |   C |    10 | 16.9 |        
     166 | 2025-05-02 10:16:23 |         MASTER-OAFA | (20h 49m 58.55s , +13d 24m 57.5s) |   C |    30 | 18.4 |        
     205 | 2025-05-02 10:17:07 |         MASTER-OAFA | (20h 43m 52.56s , +13d 09m 28.3s) |   C |    20 | 17.2 |        
     215 | 2025-05-02 10:17:08 |         MASTER-OAFA | (20h 53m 13.53s , +13d 32m 15.9s) |   C |    40 | 18.4 |        
     256 | 2025-05-02 10:17:54 |         MASTER-OAFA | (20h 43m 52.15s , +13d 09m 25.1s) |   C |    30 | 17.2 |        
     266 | 2025-05-02 10:17:54 |         MASTER-OAFA | (20h 53m 13.16s , +13d 32m 11.9s) |   C |    50 | 18.3 |        
     317 | 2025-05-02 10:18:50 |         MASTER-OAFA | (20h 43m 51.68s , +13d 09m 20.3s) |   C |    40 | 17.2 |        
     328 | 2025-05-02 10:18:50 |         MASTER-OAFA | (20h 53m 12.71s , +13d 32m 06.8s) |   C |    60 | 18.2 |        
     388 | 2025-05-02 10:19:56 |         MASTER-OAFA | (20h 43m 51.16s , +13d 09m 15.6s) |   C |    50 | 17.1 |        
     399 | 2025-05-02 10:19:56 |         MASTER-OAFA | (20h 53m 12.22s , +13d 32m 01.2s) |   C |    70 | 18.0 |        
     474 | 2025-05-02 10:21:12 |         MASTER-OAFA | (20h 43m 50.52s , +13d 09m 08.5s) |   C |    70 | 17.0 |        
     581 | 2025-05-02 10:22:48 |         MASTER-OAFA | (20h 43m 49.65s , +13d 08m 59.4s) |   C |    90 | 16.8 |        
   56942 | 2025-05-03 02:02:25 |         MASTER-SAAO | (20h 48m 15.90s , +14d 24m 26.6s) |   C |    60 | 17.8 |        
   57022 | 2025-05-03 02:03:44 |         MASTER-SAAO | (20h 56m 24.62s , +14d 23m 14.6s) |   C |    60 | 17.5 |        
   57199 | 2025-05-03 02:06:41 |         MASTER-SAAO | (20h 48m 58.45s , +12d 13m 47.9s) |   C |    60 | 17.8 |        
   57278 | 2025-05-03 02:08:01 |         MASTER-SAAO | (20h 46m 23.10s , +16d 02m 30.0s) |   C |    60 | 17.7 |        
   57358 | 2025-05-03 02:09:20 |         MASTER-SAAO | (20h 54m 50.76s , +16d 03m 14.6s) |   C |    60 | 17.3 |        
   57516 | 2025-05-03 02:11:59 |         MASTER-SAAO | (20h 43m 13.78s , +14d 08m 03.9s) |   C |    60 | 17.9 |        
   57596 | 2025-05-03 02:13:18 |         MASTER-SAAO | (20h 50m 42.22s , +14d 09m 04.8s) |   C |    60 | 17.8 |        
   57675 | 2025-05-03 02:14:38 |         MASTER-SAAO | (20h 59m 04.91s , +14d 07m 18.9s) |   C |    60 | 17.7 |        
   57834 | 2025-05-03 02:17:17 |         MASTER-SAAO | (20h 48m 46.15s , +12d 14m 39.9s) |   C |    60 | 17.5 |        
   57913 | 2025-05-03 02:18:36 |         MASTER-SAAO | (20h 46m 14.93s , +16d 03m 45.7s) |   C |    60 | 17.7 |        
   57993 | 2025-05-03 02:19:56 |         MASTER-SAAO | (20h 54m 45.41s , +16d 02m 28.1s) |   C |    60 | 17.3 |        
   58152 | 2025-05-03 02:22:34 |         MASTER-SAAO | (20h 43m 07.20s , +14d 07m 60.0s) |   C |    60 | 18.2 |        
   58231 | 2025-05-03 02:23:53 |         MASTER-SAAO | (20h 50m 34.19s , +14d 09m 39.0s) |   C |    60 | 17.9 |        
   58310 | 2025-05-03 02:25:13 |         MASTER-SAAO | (20h 58m 55.30s , +14d 07m 52.6s) |   C |    60 | 17.8 |        
   58469 | 2025-05-03 02:27:51 |         MASTER-SAAO | (20h 48m 39.10s , +12d 14m 48.2s) |   C |    60 | 18.1 |        
   58548 | 2025-05-03 02:29:11 |         MASTER-SAAO | (20h 46m 10.55s , +16d 03m 52.6s) |   C |    60 | 18.4 |        
   58627 | 2025-05-03 02:30:30 |         MASTER-SAAO | (20h 54m 39.72s , +16d 02m 34.8s) |   C |    60 | 17.9 |        
   58786 | 2025-05-03 02:33:09 |         MASTER-SAAO | (20h 43m 08.44s , +14d 08m 13.7s) |   C |    60 | 18.4 |        
   58865 | 2025-05-03 02:34:28 |         MASTER-SAAO | (20h 50m 30.45s , +14d 09m 30.0s) |   C |    60 | 18.2 |        
   58945 | 2025-05-03 02:35:47 |         MASTER-SAAO | (20h 58m 47.94s , +14d 07m 47.3s) |   C |    60 | 17.8 |        
   59103 | 2025-05-03 02:38:26 |         MASTER-SAAO | (20h 48m 40.71s , +12d 14m 53.1s) |   C |    60 | 18.3 |        
   59182 | 2025-05-03 02:39:45 |         MASTER-SAAO | (20h 46m 10.92s , +16d 03m 59.9s) |   C |    60 | 18.1 |        
   59262 | 2025-05-03 02:41:05 |         MASTER-SAAO | (20h 54m 37.13s , +16d 02m 41.9s) |   C |    60 | 17.6 |        
   59421 | 2025-05-03 02:43:44 |         MASTER-SAAO | (20h 43m 07.98s , +14d 08m 37.2s) |   C |    60 | 18.2 |        
   59500 | 2025-05-03 02:45:03 |         MASTER-SAAO | (20h 50m 31.08s , +14d 09m 28.6s) |   C |    60 | 18.2 |        
   59579 | 2025-05-03 02:46:22 |         MASTER-SAAO | (20h 58m 46.59s , +14d 07m 43.1s) |   C |    60 | 18.2 |        
   59738 | 2025-05-03 02:49:01 |         MASTER-SAAO | (20h 48m 40.18s , +12d 14m 59.3s) |   C |    60 | 18.3 |        
   59817 | 2025-05-03 02:50:20 |         MASTER-SAAO | (20h 46m 12.28s , +16d 04m 06.6s) |   C |    60 | 18.1 |        
   59896 | 2025-05-03 02:51:39 |         MASTER-SAAO | (20h 54m 37.42s , +16d 02m 47.9s) |   C |    60 | 18.1 |        
   60055 | 2025-05-03 02:54:18 |         MASTER-SAAO | (20h 43m 09.67s , +14d 08m 36.9s) |   C |    60 | 18.4 |        
   60134 | 2025-05-03 02:55:37 |         MASTER-SAAO | (20h 50m 31.68s , +14d 09m 34.3s) |   C |    60 | 18.3 |        
   60214 | 2025-05-03 02:56:57 |         MASTER-SAAO | (20h 58m 47.20s , +14d 07m 57.2s) |   C |    60 | 18.2 |        
   60373 | 2025-05-03 02:59:36 |         MASTER-SAAO | (20h 48m 40.75s , +12d 15m 05.9s) |   C |    60 | 18.3 |        
   60452 | 2025-05-03 03:00:55 |         MASTER-SAAO | (20h 46m 12.93s , +16d 04m 13.7s) |   C |    60 | 18.2 |        
   60532 | 2025-05-03 03:02:15 |         MASTER-SAAO | (20h 54m 38.09s , +16d 02m 55.2s) |   C |    60 | 17.9 |        
   60691 | 2025-05-03 03:04:54 |         MASTER-SAAO | (20h 43m 10.21s , +14d 08m 51.3s) |   C |    60 | 18.1 |        
   60770 | 2025-05-03 03:06:13 |         MASTER-SAAO | (20h 56m 06.94s , +12d 14m 17.2s) |   C |    60 | 18.0 |        
   60850 | 2025-05-03 03:07:33 |         MASTER-SAAO | (21h 04m 21.84s , +12d 15m 29.1s) |   C |    60 | 18.1 |        
   61009 | 2025-05-03 03:10:11 |         MASTER-SAAO | (20h 55m 42.06s , +10d 20m 56.3s) |   C |    60 | 18.2 |        
   61414 | 2025-05-03 03:16:57 |         MASTER-SAAO | (20h 56m 03.39s , +12d 15m 56.2s) |   C |    60 | 18.3 |        
   61493 | 2025-05-03 03:18:16 |         MASTER-SAAO | (21h 04m 20.89s , +12d 14m 40.2s) |   C |    60 | 18.4 |        
   61653 | 2025-05-03 03:20:56 |         MASTER-SAAO | (20h 55m 42.90s , +10d 20m 26.1s) |   C |    60 | 18.5 |        
   62056 | 2025-05-03 03:27:39 |         MASTER-SAAO | (20h 56m 02.92s , +12d 16m 06.8s) |   C |    60 | 18.4 |        
   62136 | 2025-05-03 03:28:58 |         MASTER-SAAO | (21h 04m 21.11s , +12d 14m 50.7s) |   C |    60 | 18.4 |        
   62294 | 2025-05-03 03:31:37 |         MASTER-SAAO | (20h 55m 42.80s , +10d 20m 44.6s) |   C |    60 | 18.7 |        
   62698 | 2025-05-03 03:38:21 |         MASTER-SAAO | (20h 56m 03.79s , +12d 16m 18.7s) |   C |    60 | 18.5 |        
   62778 | 2025-05-03 03:39:41 |         MASTER-SAAO | (21h 04m 21.66s , +12d 15m 01.4s) |   C |    60 | 18.5 |        
   62937 | 2025-05-03 03:42:20 |         MASTER-SAAO | (20h 55m 42.96s , +10d 20m 29.2s) |   C |    60 | 18.6 |        
   63340 | 2025-05-03 03:49:03 |         MASTER-SAAO | (20h 56m 05.97s , +12d 16m 27.8s) |   C |    60 | 18.2 |        
   63419 | 2025-05-03 03:50:22 |         MASTER-SAAO | (21h 04m 20.76s , +12d 15m 10.3s) |   C |    60 | 18.5 |        
   63578 | 2025-05-03 03:53:01 |         MASTER-SAAO | (20h 55m 46.76s , +10d 21m 01.0s) |   C |    60 | 18.3 |        
   63989 | 2025-05-03 03:59:52 |         MASTER-SAAO | (20h 56m 11.78s , +12d 16m 38.2s) |   C |    60 | 18.2 |        
   64074 | 2025-05-03 04:01:17 |         MASTER-SAAO | (21h 04m 26.12s , +12d 15m 20.6s) |   C |    60 | 18.3 |        
   64233 | 2025-05-03 04:03:56 |         MASTER-SAAO | (20h 55m 51.87s , +10d 20m 51.5s) |   C |    60 | 18.2 |        
  148259 | 2025-05-04 03:24:22 |         MASTER-SAAO | (20h 50m 25.35s , +14d 08m 33.3s) |   C |    60 | 18.5 |        
  148339 | 2025-05-04 03:25:41 |         MASTER-SAAO | (20h 58m 43.57s , +14d 09m 40.2s) |   C |    60 | 18.6 |        
  148663 | 2025-05-04 03:31:06 |         MASTER-SAAO | (20h 48m 38.24s , +12d 14m 56.4s) |   C |    60 | 18.7 |        
  148761 | 2025-05-04 03:32:43 |         MASTER-SAAO | (20h 46m 09.73s , +16d 04m 38.1s) |   C |    60 | 18.6 |        
  148930 | 2025-05-04 03:35:33 |         MASTER-SAAO | (20h 54m 26.82s , +16d 03m 27.2s) |   C |    60 | 18.5 |        
  149102 | 2025-05-04 03:38:25 |         MASTER-SAAO | (20h 50m 24.97s , +14d 08m 39.0s) |   C |    60 | 18.4 |        
  149181 | 2025-05-04 03:39:44 |         MASTER-SAAO | (20h 58m 45.00s , +14d 08m 29.9s) |   C |    60 | 18.6 |        
  149427 | 2025-05-04 03:43:50 |         MASTER-SAAO | (20h 48m 47.63s , +12d 15m 49.2s) |   C |    60 | 18.4 |        
  149507 | 2025-05-04 03:45:09 |         MASTER-SAAO | (20h 46m 14.04s , +16d 04m 00.9s) |   C |    60 | 18.5 |        
  149677 | 2025-05-04 03:48:00 |         MASTER-SAAO | (20h 54m 36.11s , +16d 03m 39.8s) |   C |    60 | 18.3 |        
  149849 | 2025-05-04 03:50:51 |         MASTER-SAAO | (20h 50m 33.67s , +14d 10m 30.6s) |   C |    60 | 18.3 |        
  149928 | 2025-05-04 03:52:11 |         MASTER-SAAO | (20h 58m 46.15s , +14d 09m 00.1s) |   C |    60 | 18.4 |        
  150087 | 2025-05-04 03:54:49 |         MASTER-SAAO | (20h 48m 51.80s , +12d 16m 00.7s) |   C |    60 | 18.5 |        
  150166 | 2025-05-04 03:56:09 |         MASTER-SAAO | (20h 46m 22.16s , +16d 03m 20.4s) |   C |    60 | 18.4 |        
  150337 | 2025-05-04 03:58:59 |         MASTER-SAAO | (20h 54m 35.40s , +16d 03m 52.0s) |   C |    60 | 18.2 |        
  150512 | 2025-05-04 04:01:55 |         MASTER-SAAO | (20h 50m 37.17s , +14d 09m 04.2s) |   C |    60 | 18.3 |        
  150591 | 2025-05-04 04:03:14 |         MASTER-SAAO | (20h 58m 54.70s , +14d 09m 00.1s) |   C |    60 | 18.3 |        
  150670 | 2025-05-04 04:04:33 |         MASTER-SAAO | (20h 40m 51.02s , +12d 17m 22.7s) |   C |    60 | 18.3 |        
  150750 | 2025-05-04 04:05:52 |         MASTER-SAAO | (20h 48m 53.74s , +12d 16m 13.6s) |   C |    60 | 18.3 |        
  150829 | 2025-05-04 04:07:12 |         MASTER-SAAO | (20h 46m 31.19s , +16d 04m 26.4s) |   C |    60 | 18.1 |        
  150999 | 2025-05-04 04:10:02 |         MASTER-SAAO | (20h 54m 48.87s , +16d 03m 12.6s) |   C |    60 | 17.8 |        
  151170 | 2025-05-04 04:12:53 |         MASTER-SAAO | (20h 50m 49.04s , +14d 10m 57.3s) |   C |    60 | 17.8 |        
  151249 | 2025-05-04 04:14:12 |         MASTER-SAAO | (20h 58m 55.40s , +14d 09m 56.7s) |   C |    60 | 17.7 |        
  151408 | 2025-05-04 04:16:50 |         MASTER-SAAO | (20h 49m 04.98s , +12d 15m 33.3s) |   C |    60 | 17.6 |        
  151487 | 2025-05-04 04:18:10 |         MASTER-SAAO | (20h 46m 34.46s , +16d 05m 39.8s) |   C |    60 | 17.4 |        
  151659 | 2025-05-04 04:21:01 |         MASTER-SAAO | (20h 54m 54.23s , +16d 05m 12.6s) |   C |    60 | 16.9 |        
  151829 | 2025-05-04 04:23:51 |         MASTER-SAAO | (20h 50m 48.40s , +14d 11m 33.6s) |   C |    60 | 16.9 |        
  151909 | 2025-05-04 04:25:12 |         MASTER-SAAO | (20h 59m 07.22s , +14d 10m 11.5s) |   C |    60 | 16.6 |        
  151988 | 2025-05-04 04:26:31 |         MASTER-SAAO | (20h 40m 56.47s , +12d 16m 06.4s) |   C |    60 | 16.9 |        
  152067 | 2025-05-04 04:27:50 |         MASTER-SAAO | (20h 49m 12.19s , +12d 16m 06.8s) |   C |    60 | 16.5 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12488
TYPE = 35
DAYS = 1


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB 250502B ( Fermi GBM team, GCN 40314) errorbox  74 sec after notice time and 110 sec after trigger time at 2025-05-02 10:15:44 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 44 deg. The sun  altitude  is -11.2 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 250502B errorbox  56876 sec after notice time and 56912 sec after trigger time at 2025-05-03 02:02:25 UT, with upper limit up to  18.7 mag. The observations began at zenith distance = 60 deg. The sun  altitude  is -40.4 deg. 

The galactic latitude b = -20 deg., longitude l = 61 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858665

We obtain a following upper limits.  

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

     121 | 2025-05-02 10:15:44 |         MASTER-OAFA | (20h 40m 38.20s , +13d 02m 12.4s) |   C |    20 | 17.2 |        
     121 | 2025-05-02 10:15:44 |         MASTER-OAFA | (20h 49m 58.93s , +13d 25m 00.9s) |   C |    20 | 18.3 |        
     155 | 2025-05-02 10:16:23 |         MASTER-OAFA | (20h 40m 37.90s , +13d 02m 09.6s) |   C |    10 | 16.9 |        
     166 | 2025-05-02 10:16:23 |         MASTER-OAFA | (20h 49m 58.55s , +13d 24m 57.5s) |   C |    30 | 18.4 |        
     205 | 2025-05-02 10:17:07 |         MASTER-OAFA | (20h 43m 52.56s , +13d 09m 28.3s) |   C |    20 | 17.2 |        
     215 | 2025-05-02 10:17:08 |         MASTER-OAFA | (20h 53m 13.53s , +13d 32m 15.9s) |   C |    40 | 18.4 |        
     256 | 2025-05-02 10:17:54 |         MASTER-OAFA | (20h 43m 52.15s , +13d 09m 25.1s) |   C |    30 | 17.2 |        
     266 | 2025-05-02 10:17:54 |         MASTER-OAFA | (20h 53m 13.16s , +13d 32m 11.9s) |   C |    50 | 18.3 |        
     317 | 2025-05-02 10:18:50 |         MASTER-OAFA | (20h 43m 51.68s , +13d 09m 20.3s) |   C |    40 | 17.2 |        
     328 | 2025-05-02 10:18:50 |         MASTER-OAFA | (20h 53m 12.71s , +13d 32m 06.8s) |   C |    60 | 18.2 |        
     388 | 2025-05-02 10:19:56 |         MASTER-OAFA | (20h 43m 51.16s , +13d 09m 15.6s) |   C |    50 | 17.1 |        
     399 | 2025-05-02 10:19:56 |         MASTER-OAFA | (20h 53m 12.22s , +13d 32m 01.2s) |   C |    70 | 18.0 |        
     474 | 2025-05-02 10:21:12 |         MASTER-OAFA | (20h 43m 50.52s , +13d 09m 08.5s) |   C |    70 | 17.0 |        
     581 | 2025-05-02 10:22:48 |         MASTER-OAFA | (20h 43m 49.65s , +13d 08m 59.4s) |   C |    90 | 16.8 |        
   56942 | 2025-05-03 02:02:25 |         MASTER-SAAO | (20h 48m 15.90s , +14d 24m 26.6s) |   C |    60 | 17.8 |        
   57022 | 2025-05-03 02:03:44 |         MASTER-SAAO | (20h 56m 24.62s , +14d 23m 14.6s) |   C |    60 | 17.5 |        
   57199 | 2025-05-03 02:06:41 |         MASTER-SAAO | (20h 48m 58.45s , +12d 13m 47.9s) |   C |    60 | 17.8 |        
   57278 | 2025-05-03 02:08:01 |         MASTER-SAAO | (20h 46m 23.10s , +16d 02m 30.0s) |   C |    60 | 17.7 |        
   57358 | 2025-05-03 02:09:20 |         MASTER-SAAO | (20h 54m 50.76s , +16d 03m 14.6s) |   C |    60 | 17.3 |        
   57516 | 2025-05-03 02:11:59 |         MASTER-SAAO | (20h 43m 13.78s , +14d 08m 03.9s) |   C |    60 | 17.9 |        
   57596 | 2025-05-03 02:13:18 |         MASTER-SAAO | (20h 50m 42.22s , +14d 09m 04.8s) |   C |    60 | 17.8 |        
   57675 | 2025-05-03 02:14:38 |         MASTER-SAAO | (20h 59m 04.91s , +14d 07m 18.9s) |   C |    60 | 17.7 |        
   57834 | 2025-05-03 02:17:17 |         MASTER-SAAO | (20h 48m 46.15s , +12d 14m 39.9s) |   C |    60 | 17.5 |        
   57913 | 2025-05-03 02:18:36 |         MASTER-SAAO | (20h 46m 14.93s , +16d 03m 45.7s) |   C |    60 | 17.7 |        
   57993 | 2025-05-03 02:19:56 |         MASTER-SAAO | (20h 54m 45.41s , +16d 02m 28.1s) |   C |    60 | 17.3 |        
   58152 | 2025-05-03 02:22:34 |         MASTER-SAAO | (20h 43m 07.20s , +14d 07m 60.0s) |   C |    60 | 18.2 |        
   58231 | 2025-05-03 02:23:53 |         MASTER-SAAO | (20h 50m 34.19s , +14d 09m 39.0s) |   C |    60 | 17.9 |        
   58310 | 2025-05-03 02:25:13 |         MASTER-SAAO | (20h 58m 55.30s , +14d 07m 52.6s) |   C |    60 | 17.8 |        
   58469 | 2025-05-03 02:27:51 |         MASTER-SAAO | (20h 48m 39.10s , +12d 14m 48.2s) |   C |    60 | 18.1 |        
   58548 | 2025-05-03 02:29:11 |         MASTER-SAAO | (20h 46m 10.55s , +16d 03m 52.6s) |   C |    60 | 18.4 |        
   58627 | 2025-05-03 02:30:30 |         MASTER-SAAO | (20h 54m 39.72s , +16d 02m 34.8s) |   C |    60 | 17.9 |        
   58786 | 2025-05-03 02:33:09 |         MASTER-SAAO | (20h 43m 08.44s , +14d 08m 13.7s) |   C |    60 | 18.4 |        
   58865 | 2025-05-03 02:34:28 |         MASTER-SAAO | (20h 50m 30.45s , +14d 09m 30.0s) |   C |    60 | 18.2 |        
   58945 | 2025-05-03 02:35:47 |         MASTER-SAAO | (20h 58m 47.94s , +14d 07m 47.3s) |   C |    60 | 17.8 |        
   59103 | 2025-05-03 02:38:26 |         MASTER-SAAO | (20h 48m 40.71s , +12d 14m 53.1s) |   C |    60 | 18.3 |        
   59182 | 2025-05-03 02:39:45 |         MASTER-SAAO | (20h 46m 10.92s , +16d 03m 59.9s) |   C |    60 | 18.1 |        
   59262 | 2025-05-03 02:41:05 |         MASTER-SAAO | (20h 54m 37.13s , +16d 02m 41.9s) |   C |    60 | 17.6 |        
   59421 | 2025-05-03 02:43:44 |         MASTER-SAAO | (20h 43m 07.98s , +14d 08m 37.2s) |   C |    60 | 18.2 |        
   59500 | 2025-05-03 02:45:03 |         MASTER-SAAO | (20h 50m 31.08s , +14d 09m 28.6s) |   C |    60 | 18.2 |        
   59579 | 2025-05-03 02:46:22 |         MASTER-SAAO | (20h 58m 46.59s , +14d 07m 43.1s) |   C |    60 | 18.2 |        
   59738 | 2025-05-03 02:49:01 |         MASTER-SAAO | (20h 48m 40.18s , +12d 14m 59.3s) |   C |    60 | 18.3 |        
   59817 | 2025-05-03 02:50:20 |         MASTER-SAAO | (20h 46m 12.28s , +16d 04m 06.6s) |   C |    60 | 18.1 |        
   59896 | 2025-05-03 02:51:39 |         MASTER-SAAO | (20h 54m 37.42s , +16d 02m 47.9s) |   C |    60 | 18.1 |        
   60055 | 2025-05-03 02:54:18 |         MASTER-SAAO | (20h 43m 09.67s , +14d 08m 36.9s) |   C |    60 | 18.4 |        
   60134 | 2025-05-03 02:55:37 |         MASTER-SAAO | (20h 50m 31.68s , +14d 09m 34.3s) |   C |    60 | 18.3 |        
   60214 | 2025-05-03 02:56:57 |         MASTER-SAAO | (20h 58m 47.20s , +14d 07m 57.2s) |   C |    60 | 18.2 |        
   60373 | 2025-05-03 02:59:36 |         MASTER-SAAO | (20h 48m 40.75s , +12d 15m 05.9s) |   C |    60 | 18.3 |        
   60452 | 2025-05-03 03:00:55 |         MASTER-SAAO | (20h 46m 12.93s , +16d 04m 13.7s) |   C |    60 | 18.2 |        
   60532 | 2025-05-03 03:02:15 |         MASTER-SAAO | (20h 54m 38.09s , +16d 02m 55.2s) |   C |    60 | 17.9 |        
   60691 | 2025-05-03 03:04:54 |         MASTER-SAAO | (20h 43m 10.21s , +14d 08m 51.3s) |   C |    60 | 18.1 |        
   60770 | 2025-05-03 03:06:13 |         MASTER-SAAO | (20h 56m 06.94s , +12d 14m 17.2s) |   C |    60 | 18.0 |        
   60850 | 2025-05-03 03:07:33 |         MASTER-SAAO | (21h 04m 21.84s , +12d 15m 29.1s) |   C |    60 | 18.1 |        
   61009 | 2025-05-03 03:10:11 |         MASTER-SAAO | (20h 55m 42.06s , +10d 20m 56.3s) |   C |    60 | 18.2 |        
   61414 | 2025-05-03 03:16:57 |         MASTER-SAAO | (20h 56m 03.39s , +12d 15m 56.2s) |   C |    60 | 18.3 |        
   61493 | 2025-05-03 03:18:16 |         MASTER-SAAO | (21h 04m 20.89s , +12d 14m 40.2s) |   C |    60 | 18.4 |        
   61653 | 2025-05-03 03:20:56 |         MASTER-SAAO | (20h 55m 42.90s , +10d 20m 26.1s) |   C |    60 | 18.5 |        
   62056 | 2025-05-03 03:27:39 |         MASTER-SAAO | (20h 56m 02.92s , +12d 16m 06.8s) |   C |    60 | 18.4 |        
   62136 | 2025-05-03 03:28:58 |         MASTER-SAAO | (21h 04m 21.11s , +12d 14m 50.7s) |   C |    60 | 18.4 |        
   62294 | 2025-05-03 03:31:37 |         MASTER-SAAO | (20h 55m 42.80s , +10d 20m 44.6s) |   C |    60 | 18.7 |        
   62698 | 2025-05-03 03:38:21 |         MASTER-SAAO | (20h 56m 03.79s , +12d 16m 18.7s) |   C |    60 | 18.5 |        
   62778 | 2025-05-03 03:39:41 |         MASTER-SAAO | (21h 04m 21.66s , +12d 15m 01.4s) |   C |    60 | 18.5 |        
   62937 | 2025-05-03 03:42:20 |         MASTER-SAAO | (20h 55m 42.96s , +10d 20m 29.2s) |   C |    60 | 18.6 |        
   63340 | 2025-05-03 03:49:03 |         MASTER-SAAO | (20h 56m 05.97s , +12d 16m 27.8s) |   C |    60 | 18.2 |        
   63419 | 2025-05-03 03:50:22 |         MASTER-SAAO | (21h 04m 20.76s , +12d 15m 10.3s) |   C |    60 | 18.5 |        
   63578 | 2025-05-03 03:53:01 |         MASTER-SAAO | (20h 55m 46.76s , +10d 21m 01.0s) |   C |    60 | 18.3 |        
   63989 | 2025-05-03 03:59:52 |         MASTER-SAAO | (20h 56m 11.78s , +12d 16m 38.2s) |   C |    60 | 18.2 |        
   64074 | 2025-05-03 04:01:17 |         MASTER-SAAO | (21h 04m 26.12s , +12d 15m 20.6s) |   C |    60 | 18.3 |        
   64233 | 2025-05-03 04:03:56 |         MASTER-SAAO | (20h 55m 51.87s , +10d 20m 51.5s) |   C |    60 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12486
TYPE = 35
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB 250502B ( Fermi GBM team, GCN 40314) errorbox  74 sec after notice time and 110 sec after trigger time at 2025-05-02 10:15:44 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 44 deg. The sun  altitude  is -11.2 deg. 

The galactic latitude b = -18 deg., longitude l = 61 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858681

We obtain a following upper limits.  

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

     121 | 2025-05-02 10:15:44 |         MASTER-OAFA | (20h 40m 38.20s , +13d 02m 12.4s) |   C |    20 | 17.2 |        
     121 | 2025-05-02 10:15:44 |         MASTER-OAFA | (20h 49m 58.93s , +13d 25m 00.9s) |   C |    20 | 18.3 |        
     155 | 2025-05-02 10:16:23 |         MASTER-OAFA | (20h 40m 37.90s , +13d 02m 09.6s) |   C |    10 | 16.9 |        
     166 | 2025-05-02 10:16:23 |         MASTER-OAFA | (20h 49m 58.55s , +13d 24m 57.5s) |   C |    30 | 18.4 |        
     205 | 2025-05-02 10:17:07 |         MASTER-OAFA | (20h 43m 52.56s , +13d 09m 28.3s) |   C |    20 | 17.2 |        
     215 | 2025-05-02 10:17:08 |         MASTER-OAFA | (20h 53m 13.53s , +13d 32m 15.9s) |   C |    40 | 18.4 |        
     256 | 2025-05-02 10:17:54 |         MASTER-OAFA | (20h 43m 52.15s , +13d 09m 25.1s) |   C |    30 | 17.2 |        
     266 | 2025-05-02 10:17:54 |         MASTER-OAFA | (20h 53m 13.16s , +13d 32m 11.9s) |   C |    50 | 18.3 |        
     317 | 2025-05-02 10:18:50 |         MASTER-OAFA | (20h 43m 51.68s , +13d 09m 20.3s) |   C |    40 | 17.2 |        
     328 | 2025-05-02 10:18:50 |         MASTER-OAFA | (20h 53m 12.71s , +13d 32m 06.8s) |   C |    60 | 18.2 |        
     388 | 2025-05-02 10:19:56 |         MASTER-OAFA | (20h 43m 51.16s , +13d 09m 15.6s) |   C |    50 | 17.1 |        
     399 | 2025-05-02 10:19:56 |         MASTER-OAFA | (20h 53m 12.22s , +13d 32m 01.2s) |   C |    70 | 18.0 |        
     474 | 2025-05-02 10:21:12 |         MASTER-OAFA | (20h 43m 50.52s , +13d 09m 08.5s) |   C |    70 | 17.0 |        
     581 | 2025-05-02 10:22:48 |         MASTER-OAFA | (20h 43m 49.65s , +13d 08m 59.4s) |   C |    90 | 16.8 |        
     715 | 2025-05-02 10:24:52 |         MASTER-OAFA | (20h 39m 05.67s , +13d 52m 50.6s) |   C |   110 | 16.6 |        
     828 | 2025-05-02 10:27:21 |         MASTER-OAFA | (20h 36m 00.38s , +11d 56m 35.1s) |   C |    40 | 16.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12485
TYPE = 35
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB 250502B ( Fermi GBM team, GCN 40314) errorbox  74 sec after notice time and 110 sec after trigger time at 2025-05-02 10:15:44 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 44 deg. The sun  altitude  is -11.2 deg. 

The galactic latitude b = -18 deg., longitude l = 61 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858681

We obtain a following upper limits.  

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

     121 | 2025-05-02 10:15:44 |         MASTER-OAFA | (20h 40m 38.20s , +13d 02m 12.4s) |   C |    20 | 17.2 |        
     121 | 2025-05-02 10:15:44 |         MASTER-OAFA | (20h 49m 58.93s , +13d 25m 00.9s) |   C |    20 | 18.3 |        
     155 | 2025-05-02 10:16:23 |         MASTER-OAFA | (20h 40m 37.90s , +13d 02m 09.6s) |   C |    10 | 16.9 |        
     166 | 2025-05-02 10:16:23 |         MASTER-OAFA | (20h 49m 58.55s , +13d 24m 57.5s) |   C |    30 | 18.4 |        
     205 | 2025-05-02 10:17:07 |         MASTER-OAFA | (20h 43m 52.56s , +13d 09m 28.3s) |   C |    20 | 17.2 |        
     215 | 2025-05-02 10:17:08 |         MASTER-OAFA | (20h 53m 13.53s , +13d 32m 15.9s) |   C |    40 | 18.4 |        
     256 | 2025-05-02 10:17:54 |         MASTER-OAFA | (20h 43m 52.15s , +13d 09m 25.1s) |   C |    30 | 17.2 |        
     266 | 2025-05-02 10:17:54 |         MASTER-OAFA | (20h 53m 13.16s , +13d 32m 11.9s) |   C |    50 | 18.3 |        
     317 | 2025-05-02 10:18:50 |         MASTER-OAFA | (20h 43m 51.68s , +13d 09m 20.3s) |   C |    40 | 17.2 |        
     328 | 2025-05-02 10:18:50 |         MASTER-OAFA | (20h 53m 12.71s , +13d 32m 06.8s) |   C |    60 | 18.2 |        
     388 | 2025-05-02 10:19:56 |         MASTER-OAFA | (20h 43m 51.16s , +13d 09m 15.6s) |   C |    50 | 17.1 |        
     399 | 2025-05-02 10:19:56 |         MASTER-OAFA | (20h 53m 12.22s , +13d 32m 01.2s) |   C |    70 | 18.0 |        
     474 | 2025-05-02 10:21:12 |         MASTER-OAFA | (20h 43m 50.52s , +13d 09m 08.5s) |   C |    70 | 17.0 |        
     581 | 2025-05-02 10:22:48 |         MASTER-OAFA | (20h 43m 49.65s , +13d 08m 59.4s) |   C |    90 | 16.8 |        
     715 | 2025-05-02 10:24:52 |         MASTER-OAFA | (20h 39m 05.67s , +13d 52m 50.6s) |   C |   110 | 16.6 |        
     828 | 2025-05-02 10:27:21 |         MASTER-OAFA | (20h 36m 00.38s , +11d 56m 35.1s) |   C |    40 | 16.4 |        
Filter C is a clear (unfiltred) band. 


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



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  ID = 12484
TYPE = 34
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB 250502B ( Fermi GBM team, GCN 40314) errorbox  74 sec after notice time and 110 sec after trigger time at 2025-05-02 10:15:44 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 44 deg. The sun  altitude  is -11.2 deg. 

The galactic latitude b = -18 deg., longitude l = 61 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2858681

We obtain a following upper limits.  

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

     121 | 2025-05-02 10:15:44 |         MASTER-OAFA | (20h 40m 38.20s , +13d 02m 12.4s) |   C |    20 | 17.2 |        
     121 | 2025-05-02 10:15:44 |         MASTER-OAFA | (20h 49m 58.93s , +13d 25m 00.9s) |   C |    20 | 18.3 |        
     155 | 2025-05-02 10:16:23 |         MASTER-OAFA | (20h 40m 37.90s , +13d 02m 09.6s) |   C |    10 | 16.9 |        
     166 | 2025-05-02 10:16:23 |         MASTER-OAFA | (20h 49m 58.55s , +13d 24m 57.5s) |   C |    30 | 18.4 |        
     205 | 2025-05-02 10:17:07 |         MASTER-OAFA | (20h 43m 52.56s , +13d 09m 28.3s) |   C |    20 | 17.2 |        
     215 | 2025-05-02 10:17:08 |         MASTER-OAFA | (20h 53m 13.53s , +13d 32m 15.9s) |   C |    40 | 18.4 |        
     256 | 2025-05-02 10:17:54 |         MASTER-OAFA | (20h 43m 52.15s , +13d 09m 25.1s) |   C |    30 | 17.2 |        
     266 | 2025-05-02 10:17:54 |         MASTER-OAFA | (20h 53m 13.16s , +13d 32m 11.9s) |   C |    50 | 18.3 |        
     317 | 2025-05-02 10:18:50 |         MASTER-OAFA | (20h 43m 51.68s , +13d 09m 20.3s) |   C |    40 | 17.2 |        
     328 | 2025-05-02 10:18:50 |         MASTER-OAFA | (20h 53m 12.71s , +13d 32m 06.8s) |   C |    60 | 18.2 |        
     388 | 2025-05-02 10:19:56 |         MASTER-OAFA | (20h 43m 51.16s , +13d 09m 15.6s) |   C |    50 | 17.1 |        
     399 | 2025-05-02 10:19:56 |         MASTER-OAFA | (20h 53m 12.22s , +13d 32m 01.2s) |   C |    70 | 18.0 |        
     474 | 2025-05-02 10:21:12 |         MASTER-OAFA | (20h 43m 50.52s , +13d 09m 08.5s) |   C |    70 | 17.0 |        
     581 | 2025-05-02 10:22:48 |         MASTER-OAFA | (20h 43m 49.65s , +13d 08m 59.4s) |   C |    90 | 16.8 |        
     715 | 2025-05-02 10:24:52 |         MASTER-OAFA | (20h 39m 05.67s , +13d 52m 50.6s) |   C |   110 | 16.6 |        
     828 | 2025-05-02 10:27:21 |         MASTER-OAFA | (20h 36m 00.38s , +11d 56m 35.1s) |   C |    40 | 16.4 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025