MASTER Net MASTER Database: GRB250512.47 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 EP GRB250512.47
Trignum 1747048928
Trigger time 2025-05-12 11:22:08
Notice time 2025-05-12 12:15:50.527175
Coord, eb (14h 20m 51.84s , -10d 05m 31.2s) , 0.01
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
2869208 2025-05-13 07:07:11.919242 14h 20m 49.03s -10d 06m 03.2s EP 0.01 alert 1747048928 0 1115 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

2025-05-12 11:22:08 (JD 2460807.973704)

Siderial time 5.242536 h

Ra 14:20:51.84 Dec -10:05:31.20
(215.216000d, -10.092000d)

Rise 2025-05-12 15:24:10

Transit 2025-05-12 20:26:57

Set 2025-05-12 01:33:40

Amur

Object: Altitude: 17.23 Azimuth: 311.38

Sun: Altitude: -3.25 Azimuth: 123.91

Moon: Altitude: 2.48 Azimuth: 308.66

Tunka

Object: Altitude: 3.39 Azimuth: 291.05

Sun: Altitude: 11.26 Azimuth: 105.15

Moon: Altitude: -11.56 Azimuth: 290.05

Kislovodsk

Object: Altitude: -36.44 Azimuth: 246.09

Sun: Altitude: 51.49 Azimuth: 59.38

Moon: Altitude: -51.42 Azimuth: 247.10

Tavrida

Object: Altitude: -41.34 Azimuth: 237.11

Sun: Altitude: 55.81 Azimuth: 47.43

Moon: Altitude: -56.31 Azimuth: 236.00

SAAO

Object: Altitude: -40.50 Azimuth: 324.54

Sun: Altitude: 38.02 Azimuth: 164.73

Moon: Altitude: -33.96 Azimuth: 341.53

IAC

Object: Altitude: -69.20 Azimuth: 149.00

Sun: Altitude: 65.21 Azimuth: 288.71

Moon: Altitude: -69.84 Azimuth: 105.25

Argentina

Object: Altitude: -16.30 Azimuth: 66.66

Sun: Altitude: 0.58 Azimuth: 248.08

Moon: Altitude: -1.66 Azimuth: 63.39

Mexico

Object: Altitude: 7.00 Azimuth: 73.74

Sun: Altitude: -13.20 Azimuth: 238.98

Moon: Altitude: 8.40 Azimuth: 58.68

Ural

Object: Altitude: -21.75 Azimuth: 254.44

Sun: Altitude: 35.78 Azimuth: 66.14

Moon: Altitude: -36.59 Azimuth: 252.02

Vostryakovo

Object: Altitude: -33.31 Azimuth: 234.35

Sun: Altitude: 46.55 Azimuth: 43.06

Moon: Altitude: -47.91 Azimuth: 229.86

Gal. latitude: 46.398669 Gal. longitude: 336.850610

Dist. to Sun: 164.212548

Dist. to Moon: 14.988462

Moon coord.: (225.434225 d, -21.421223 d)

Sun coord.: (49.213698 d, 18.179924 d)

Lunar disk: 0.998238

Lunar phase: 4.812015

Lunar bright limb: 228.641533

No SN in this field

2025-05-12 12:15:50 (JD 2460808.010995)

Siderial time 6.139986 h

Ra 14:20:51.84 Dec -10:05:31.20
(215.216000d, -10.092000d)

Rise 2025-05-13 15:20:14

Transit 2025-05-13 20:23:01

Set 2025-05-13 01:29:44

Amur

Object: Altitude: 23.01 Azimuth: 324.09

Sun: Altitude: -9.86 Azimuth: 134.89

Moon: Altitude: 8.33 Azimuth: 319.31

Tunka

Object: Altitude: 10.83 Azimuth: 302.12

Sun: Altitude: 3.49 Azimuth: 115.35

Moon: Altitude: -4.40 Azimuth: 299.91

Kislovodsk

Object: Altitude: -27.22 Azimuth: 257.32

Sun: Altitude: 42.63 Azimuth: 72.92

Moon: Altitude: -42.52 Azimuth: 259.20

Tavrida

Object: Altitude: -32.79 Azimuth: 249.84

Sun: Altitude: 47.93 Azimuth: 63.78

Moon: Altitude: -48.15 Azimuth: 250.70

SAAO

Object: Altitude: -32.85 Azimuth: 311.02

Sun: Altitude: 33.62 Azimuth: 149.94

Moon: Altitude: -29.17 Azimuth: 328.47

IAC

Object: Altitude: -71.61 Azimuth: 188.63

Sun: Altitude: 75.54 Azimuth: 311.92

Moon: Altitude: -80.17 Azimuth: 131.44

Argentina

Object: Altitude: -26.41 Azimuth: 57.44

Sun: Altitude: 10.85 Azimuth: 240.47

Moon: Altitude: -11.11 Azimuth: 55.77

Mexico

Object: Altitude: -4.24 Azimuth: 80.77

Sun: Altitude: -2.97 Azimuth: 246.67

Moon: Altitude: -1.54 Azimuth: 65.60

Ural

Object: Altitude: -14.54 Azimuth: 266.15

Sun: Altitude: 28.83 Azimuth: 78.82

Moon: Altitude: -29.79 Azimuth: 264.01

Vostryakovo

Object: Altitude: -26.63 Azimuth: 247.59

Sun: Altitude: 40.64 Azimuth: 58.71

Moon: Altitude: -41.82 Azimuth: 244.66

Gal. latitude: 46.398669 Gal. longitude: 336.850610

Dist. to Sun: 164.177588

Dist. to Moon: 15.380368

Moon coord.: (225.884169 d, -21.566958 d)

Sun coord.: (49.250294 d, 18.189277 d)

Lunar disk: 0.998368

Lunar phase: 4.630573

Lunar bright limb: 224.056025

No SN in this field

2025-05-12 13:15:50 (JD 2460808.052662)

Siderial time 7.142724 h

Ra 14:20:51.84 Dec -10:05:31.20
(215.216000d, -10.092000d)

Rise 2025-05-13 15:20:14

Transit 2025-05-13 20:23:01

Set 2025-05-13 01:29:44

Amur

Object: Altitude: 27.54 Azimuth: 339.70

Sun: Altitude: -15.81 Azimuth: 148.17

Moon: Altitude: 13.41 Azimuth: 332.06

Tunka

Object: Altitude: 18.07 Azimuth: 315.47

Sun: Altitude: -4.41 Azimuth: 127.21

Moon: Altitude: 2.77 Azimuth: 311.37

Kislovodsk

Object: Altitude: -16.45 Azimuth: 268.30

Sun: Altitude: 32.01 Azimuth: 84.92

Moon: Altitude: -32.18 Azimuth: 270.18

Tavrida

Object: Altitude: -22.44 Azimuth: 261.82

Sun: Altitude: 37.89 Azimuth: 77.65

Moon: Altitude: -38.21 Azimuth: 263.30

SAAO

Object: Altitude: -22.44 Azimuth: 299.10

Sun: Altitude: 25.97 Azimuth: 136.07

Moon: Altitude: -21.51 Azimuth: 316.14

IAC

Object: Altitude: -65.29 Azimuth: 226.04

Sun: Altitude: 79.34 Azimuth: 19.47

Moon: Altitude: -81.10 Azimuth: 223.86

Argentina

Object: Altitude: -36.36 Azimuth: 44.56

Sun: Altitude: 21.35 Azimuth: 230.43

Moon: Altitude: -20.57 Azimuth: 45.73

Mexico

Object: Altitude: -17.06 Azimuth: 88.33

Sun: Altitude: 9.14 Azimuth: 254.20

Moon: Altitude: -13.25 Azimuth: 72.41

Ural

Object: Altitude: -6.38 Azimuth: 278.73

Sun: Altitude: 20.72 Azimuth: 91.74

Moon: Altitude: -22.03 Azimuth: 276.32

Vostryakovo

Object: Altitude: -18.42 Azimuth: 260.95

Sun: Altitude: 32.87 Azimuth: 73.66

Moon: Altitude: -34.12 Azimuth: 258.79

Gal. latitude: 46.398669 Gal. longitude: 336.850610

Dist. to Sun: 164.138523

Dist. to Moon: 15.821472

Moon coord.: (226.388070 d, -21.728385 d)

Sun coord.: (49.291188 d, 18.199720 d)

Lunar disk: 0.998484

Lunar phase: 4.462791

Lunar bright limb: 218.529663

No SN in this field

2025-05-14 04:24:41 (JD 2460809.683808)

Siderial time 22.397406 h

Ra 14:20:51.84 Dec -10:05:31.20
(215.216000d, -10.092000d)

Rise 2025-05-14 15:16:18

Transit 2025-05-14 20:19:05

Set 2025-05-14 01:25:48

Amur

Object: Altitude: -42.52 Azimuth: 222.86

Sun: Altitude: 56.12 Azimuth: 25.98

Moon: Altitude: -66.37 Azimuth: 177.19

Tunka

Object: Altitude: -47.98 Azimuth: 189.13

Sun: Altitude: 55.96 Azimuth: 343.80

Moon: Altitude: -58.32 Azimuth: 132.51

Kislovodsk

Object: Altitude: -32.39 Azimuth: 108.66

Sun: Altitude: 27.03 Azimuth: 269.57

Moon: Altitude: -20.69 Azimuth: 72.33

Tavrida

Object: Altitude: -26.26 Azimuth: 102.34

Sun: Altitude: 21.00 Azimuth: 264.22

Moon: Altitude: -15.31 Azimuth: 67.37

SAAO

Object: Altitude: -6.11 Azimuth: 73.95

Sun: Altitude: -11.25 Azimuth: 254.99

Moon: Altitude: 28.23 Azimuth: 74.72

IAC

Object: Altitude: 15.13 Azimuth: 69.41

Sun: Altitude: -22.00 Azimuth: 232.53

Moon: Altitude: 25.67 Azimuth: 34.39

Argentina

Object: Altitude: 64.81 Azimuth: 146.51

Sun: Altitude: -76.69 Azimuth: 7.76

Moon: Altitude: 73.46 Azimuth: 256.69

Mexico

Object: Altitude: 41.25 Azimuth: 323.15

Sun: Altitude: -25.46 Azimuth: 134.35

Moon: Altitude: 9.26 Azimuth: 309.03

Ural

Object: Altitude: -34.96 Azimuth: 133.24

Sun: Altitude: 35.30 Azimuth: 291.94

Moon: Altitude: -33.34 Azimuth: 91.48

Vostryakovo

Object: Altitude: -25.58 Azimuth: 110.57

Sun: Altitude: 23.84 Azimuth: 271.51

Moon: Altitude: -21.20 Azimuth: 73.34

Gal. latitude: 46.398669 Gal. longitude: 336.850610

Dist. to Sun: 162.605637

Dist. to Moon: 34.346463

Moon coord.: (247.087746 d, -26.708878 d)

Sun coord.: (50.895432 d, 18.601500 d)

Lunar disk: 0.978343

Lunar phase: 16.925239

Lunar bright limb: 114.976597

No SN in this field
Recent coverage and limits telegrams

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

  ID = 12548
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 EP250512a ( EP Team et al., GCN 40437) errorbox  28318 sec after notice time and 31666 sec after trigger time at 2025-05-12 20:07:49 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 30 deg. The sun  altitude  is -54.2 deg. 

The galactic latitude b = 46 deg., longitude l = 337 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2869208

We obtain a following upper limits.  

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

   31696 | 2025-05-12 20:07:49 |         MASTER-SAAO | (14h 19m 12.13s , -10d 13m 30.1s) |   C |    60 | 17.2 |        
   31756 | 2025-05-12 20:07:49 |         MASTER-SAAO | (14h 19m 12.13s , -10d 13m 30.1s) |   C |   180 | 17.7 |  Coadd 
   31775 | 2025-05-12 20:09:08 |         MASTER-SAAO | (14h 19m 06.91s , -10d 14m 28.5s) |   C |    60 | 17.1 |        
   31855 | 2025-05-12 20:10:27 |         MASTER-SAAO | (14h 19m 12.41s , -10d 13m 58.2s) |   C |    60 | 17.2 |        
   31934 | 2025-05-12 20:11:47 |         MASTER-SAAO | (14h 19m 09.57s , -10d 12m 28.8s) |   C |    60 | 17.2 |        
   31994 | 2025-05-12 20:11:47 |         MASTER-SAAO | (14h 19m 09.57s , -10d 12m 28.8s) |   C |   180 | 17.6 |  Coadd 
   32014 | 2025-05-12 20:13:06 |         MASTER-SAAO | (14h 19m 09.61s , -10d 13m 58.7s) |   C |    60 | 17.0 |        
   32093 | 2025-05-12 20:14:25 |         MASTER-SAAO | (14h 19m 12.16s , -10d 12m 34.3s) |   C |    60 | 17.0 |        
   32172 | 2025-05-12 20:15:44 |         MASTER-SAAO | (14h 19m 07.13s , -10d 13m 22.0s) |   C |    60 | 17.0 |        
   32232 | 2025-05-12 20:15:44 |         MASTER-SAAO | (14h 19m 07.14s , -10d 13m 22.0s) |   C |   180 | 17.6 |  Coadd 
   32251 | 2025-05-12 20:17:04 |         MASTER-SAAO | (14h 19m 05.72s , -10d 12m 20.9s) |   C |    60 | 17.1 |        
   32331 | 2025-05-12 20:18:24 |         MASTER-SAAO | (14h 19m 12.92s , -10d 13m 20.0s) |   C |    60 | 17.2 |        
   32411 | 2025-05-12 20:19:43 |         MASTER-SAAO | (14h 19m 06.56s , -10d 14m 18.8s) |   C |    60 | 17.0 |        
   32471 | 2025-05-12 20:19:43 |         MASTER-SAAO | (14h 19m 06.56s , -10d 14m 18.8s) |   C |   180 | 17.5 |  Coadd 
   32491 | 2025-05-12 20:21:04 |         MASTER-SAAO | (14h 19m 13.61s , -10d 14m 04.5s) |   C |    60 | 16.9 |        
   32571 | 2025-05-12 20:22:23 |         MASTER-SAAO | (14h 19m 11.06s , -10d 12m 36.7s) |   C |    60 | 17.0 |        
   33068 | 2025-05-12 20:30:40 |         MASTER-SAAO | (14h 19m 12.88s , -10d 12m 10.3s) |   C |    60 | 16.9 |        
   33128 | 2025-05-12 20:30:40 |         MASTER-SAAO | (14h 19m 12.88s , -10d 12m 10.3s) |   C |   180 | 17.4 |  Coadd 
   33147 | 2025-05-12 20:32:00 |         MASTER-SAAO | (14h 19m 18.93s , -10d 13m 09.3s) |   C |    60 | 16.8 |        
   33227 | 2025-05-12 20:33:19 |         MASTER-SAAO | (14h 19m 14.64s , -10d 14m 08.2s) |   C |    60 | 16.8 |        
   33306 | 2025-05-12 20:34:39 |         MASTER-SAAO | (14h 19m 21.08s , -10d 14m 06.4s) |   C |    60 | 16.9 |        
   33366 | 2025-05-12 20:34:39 |         MASTER-SAAO | (14h 19m 21.08s , -10d 14m 06.4s) |   C |   180 | 17.5 |  Coadd 
   33385 | 2025-05-12 20:35:58 |         MASTER-SAAO | (14h 19m 18.22s , -10d 12m 20.5s) |   C |    60 | 16.9 |        
   33465 | 2025-05-12 20:37:17 |         MASTER-SAAO | (14h 19m 18.96s , -10d 14m 01.5s) |   C |    60 | 16.8 |        
   33544 | 2025-05-12 20:38:37 |         MASTER-SAAO | (14h 19m 22.19s , -10d 12m 23.8s) |   C |    60 | 16.9 |        
   33604 | 2025-05-12 20:38:37 |         MASTER-SAAO | (14h 19m 22.19s , -10d 12m 23.8s) |   C |   180 | 17.3 |  Coadd 
   33624 | 2025-05-12 20:39:56 |         MASTER-SAAO | (14h 19m 16.86s , -10d 13m 02.6s) |   C |    60 | 16.8 |        
   33703 | 2025-05-12 20:41:16 |         MASTER-SAAO | (14h 19m 18.30s , -10d 12m 01.7s) |   C |    60 | 16.8 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12546
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 EP250512a ( EP Team et al., GCN 40437) errorbox  28318 sec after notice time and 31541 sec after trigger time at 2025-05-12 20:07:49 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 30 deg. The sun  altitude  is -54.2 deg. 

The galactic latitude b = 46 deg., longitude l = 337 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2868623

We obtain a following upper limits.  

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

   31571 | 2025-05-12 20:07:49 |         MASTER-SAAO | (14h 19m 12.13s , -10d 13m 30.1s) |   C |    60 | 17.2 |        
   31631 | 2025-05-12 20:07:49 |         MASTER-SAAO | (14h 19m 12.13s , -10d 13m 30.1s) |   C |   180 | 17.7 |  Coadd 
   31650 | 2025-05-12 20:09:08 |         MASTER-SAAO | (14h 19m 06.91s , -10d 14m 28.5s) |   C |    60 | 17.1 |        
   31730 | 2025-05-12 20:10:27 |         MASTER-SAAO | (14h 19m 12.41s , -10d 13m 58.2s) |   C |    60 | 17.2 |        
   31809 | 2025-05-12 20:11:47 |         MASTER-SAAO | (14h 19m 09.57s , -10d 12m 28.8s) |   C |    60 | 17.2 |        
   31869 | 2025-05-12 20:11:47 |         MASTER-SAAO | (14h 19m 09.57s , -10d 12m 28.8s) |   C |   180 | 17.6 |  Coadd 
   31889 | 2025-05-12 20:13:06 |         MASTER-SAAO | (14h 19m 09.61s , -10d 13m 58.7s) |   C |    60 | 17.0 |        
   31968 | 2025-05-12 20:14:25 |         MASTER-SAAO | (14h 19m 12.16s , -10d 12m 34.3s) |   C |    60 | 17.0 |        
   32047 | 2025-05-12 20:15:44 |         MASTER-SAAO | (14h 19m 07.13s , -10d 13m 22.0s) |   C |    60 | 17.0 |        
   32107 | 2025-05-12 20:15:44 |         MASTER-SAAO | (14h 19m 07.14s , -10d 13m 22.0s) |   C |   180 | 17.6 |  Coadd 
   32126 | 2025-05-12 20:17:04 |         MASTER-SAAO | (14h 19m 05.72s , -10d 12m 20.9s) |   C |    60 | 17.1 |        
   32206 | 2025-05-12 20:18:24 |         MASTER-SAAO | (14h 19m 12.92s , -10d 13m 20.0s) |   C |    60 | 17.2 |        
   32286 | 2025-05-12 20:19:43 |         MASTER-SAAO | (14h 19m 06.56s , -10d 14m 18.8s) |   C |    60 | 17.0 |        
   32346 | 2025-05-12 20:19:43 |         MASTER-SAAO | (14h 19m 06.56s , -10d 14m 18.8s) |   C |   180 | 17.5 |  Coadd 
   32366 | 2025-05-12 20:21:04 |         MASTER-SAAO | (14h 19m 13.61s , -10d 14m 04.5s) |   C |    60 | 16.9 |        
   32446 | 2025-05-12 20:22:23 |         MASTER-SAAO | (14h 19m 11.06s , -10d 12m 36.7s) |   C |    60 | 17.0 |        
   32943 | 2025-05-12 20:30:40 |         MASTER-SAAO | (14h 19m 12.88s , -10d 12m 10.3s) |   C |    60 | 16.9 |        
   33003 | 2025-05-12 20:30:40 |         MASTER-SAAO | (14h 19m 12.88s , -10d 12m 10.3s) |   C |   180 | 17.4 |  Coadd 
   33022 | 2025-05-12 20:32:00 |         MASTER-SAAO | (14h 19m 18.93s , -10d 13m 09.3s) |   C |    60 | 16.8 |        
   33102 | 2025-05-12 20:33:19 |         MASTER-SAAO | (14h 19m 14.64s , -10d 14m 08.2s) |   C |    60 | 16.8 |        
   33181 | 2025-05-12 20:34:39 |         MASTER-SAAO | (14h 19m 21.08s , -10d 14m 06.4s) |   C |    60 | 16.9 |        
   33241 | 2025-05-12 20:34:39 |         MASTER-SAAO | (14h 19m 21.08s , -10d 14m 06.4s) |   C |   180 | 17.5 |  Coadd 
   33260 | 2025-05-12 20:35:58 |         MASTER-SAAO | (14h 19m 18.22s , -10d 12m 20.5s) |   C |    60 | 16.9 |        
   33340 | 2025-05-12 20:37:17 |         MASTER-SAAO | (14h 19m 18.96s , -10d 14m 01.5s) |   C |    60 | 16.8 |        
   33419 | 2025-05-12 20:38:37 |         MASTER-SAAO | (14h 19m 22.19s , -10d 12m 23.8s) |   C |    60 | 16.9 |        
   33499 | 2025-05-12 20:39:56 |         MASTER-SAAO | (14h 19m 16.86s , -10d 13m 02.6s) |   C |    60 | 16.8 |        
   33578 | 2025-05-12 20:41:16 |         MASTER-SAAO | (14h 19m 18.30s , -10d 12m 01.7s) |   C |    60 | 16.8 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12545
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 EP250512a ( EP Team et al., GCN 40437) errorbox  28318 sec after notice time and 31541 sec after trigger time at 2025-05-12 20:07:49 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 30 deg. The sun  altitude  is -54.2 deg. 

The galactic latitude b = 46 deg., longitude l = 337 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2868623

We obtain a following upper limits.  

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

   31571 | 2025-05-12 20:07:49 |         MASTER-SAAO | (14h 19m 12.13s , -10d 13m 30.1s) |   C |    60 | 17.2 |        
   31631 | 2025-05-12 20:07:49 |         MASTER-SAAO | (14h 19m 12.13s , -10d 13m 30.1s) |   C |   180 | 17.7 |  Coadd 
   31650 | 2025-05-12 20:09:08 |         MASTER-SAAO | (14h 19m 06.91s , -10d 14m 28.5s) |   C |    60 | 17.1 |        
   31730 | 2025-05-12 20:10:27 |         MASTER-SAAO | (14h 19m 12.41s , -10d 13m 58.2s) |   C |    60 | 17.2 |        
   31809 | 2025-05-12 20:11:47 |         MASTER-SAAO | (14h 19m 09.57s , -10d 12m 28.8s) |   C |    60 | 17.2 |        
   31869 | 2025-05-12 20:11:47 |         MASTER-SAAO | (14h 19m 09.57s , -10d 12m 28.8s) |   C |   180 | 17.6 |  Coadd 
   31889 | 2025-05-12 20:13:06 |         MASTER-SAAO | (14h 19m 09.61s , -10d 13m 58.7s) |   C |    60 | 17.0 |        
   31968 | 2025-05-12 20:14:25 |         MASTER-SAAO | (14h 19m 12.16s , -10d 12m 34.3s) |   C |    60 | 17.0 |        
   32047 | 2025-05-12 20:15:44 |         MASTER-SAAO | (14h 19m 07.13s , -10d 13m 22.0s) |   C |    60 | 17.0 |        
   32107 | 2025-05-12 20:15:44 |         MASTER-SAAO | (14h 19m 07.14s , -10d 13m 22.0s) |   C |   180 | 17.6 |  Coadd 
   32126 | 2025-05-12 20:17:04 |         MASTER-SAAO | (14h 19m 05.72s , -10d 12m 20.9s) |   C |    60 | 17.1 |        
   32206 | 2025-05-12 20:18:24 |         MASTER-SAAO | (14h 19m 12.92s , -10d 13m 20.0s) |   C |    60 | 17.2 |        
   32286 | 2025-05-12 20:19:43 |         MASTER-SAAO | (14h 19m 06.56s , -10d 14m 18.8s) |   C |    60 | 17.0 |        
   32346 | 2025-05-12 20:19:43 |         MASTER-SAAO | (14h 19m 06.56s , -10d 14m 18.8s) |   C |   180 | 17.5 |  Coadd 
   32366 | 2025-05-12 20:21:04 |         MASTER-SAAO | (14h 19m 13.61s , -10d 14m 04.5s) |   C |    60 | 16.9 |        
   32446 | 2025-05-12 20:22:23 |         MASTER-SAAO | (14h 19m 11.06s , -10d 12m 36.7s) |   C |    60 | 17.0 |        
   32943 | 2025-05-12 20:30:40 |         MASTER-SAAO | (14h 19m 12.88s , -10d 12m 10.3s) |   C |    60 | 16.9 |        
   33003 | 2025-05-12 20:30:40 |         MASTER-SAAO | (14h 19m 12.88s , -10d 12m 10.3s) |   C |   180 | 17.4 |  Coadd 
   33022 | 2025-05-12 20:32:00 |         MASTER-SAAO | (14h 19m 18.93s , -10d 13m 09.3s) |   C |    60 | 16.8 |        
   33102 | 2025-05-12 20:33:19 |         MASTER-SAAO | (14h 19m 14.64s , -10d 14m 08.2s) |   C |    60 | 16.8 |        
   33181 | 2025-05-12 20:34:39 |         MASTER-SAAO | (14h 19m 21.08s , -10d 14m 06.4s) |   C |    60 | 16.9 |        
   33241 | 2025-05-12 20:34:39 |         MASTER-SAAO | (14h 19m 21.08s , -10d 14m 06.4s) |   C |   180 | 17.5 |  Coadd 
   33260 | 2025-05-12 20:35:58 |         MASTER-SAAO | (14h 19m 18.22s , -10d 12m 20.5s) |   C |    60 | 16.9 |        
   33340 | 2025-05-12 20:37:17 |         MASTER-SAAO | (14h 19m 18.96s , -10d 14m 01.5s) |   C |    60 | 16.8 |        
   33419 | 2025-05-12 20:38:37 |         MASTER-SAAO | (14h 19m 22.19s , -10d 12m 23.8s) |   C |    60 | 16.9 |        
   33499 | 2025-05-12 20:39:56 |         MASTER-SAAO | (14h 19m 16.86s , -10d 13m 02.6s) |   C |    60 | 16.8 |        
   33578 | 2025-05-12 20:41:16 |         MASTER-SAAO | (14h 19m 18.30s , -10d 12m 01.7s) |   C |    60 | 16.8 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12544
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 EP250512a ( EP Team et al., GCN 40437) errorbox  28318 sec after notice time and 31541 sec after trigger time at 2025-05-12 20:07:49 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 30 deg. The sun  altitude  is -54.2 deg. 

The galactic latitude b = 46 deg., longitude l = 337 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2868623

We obtain a following upper limits.  

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

   31571 | 2025-05-12 20:07:49 |         MASTER-SAAO | (14h 19m 12.13s , -10d 13m 30.1s) |   C |    60 | 17.2 |        
   31631 | 2025-05-12 20:07:49 |         MASTER-SAAO | (14h 19m 12.13s , -10d 13m 30.1s) |   C |   180 | 17.7 |  Coadd 
   31650 | 2025-05-12 20:09:08 |         MASTER-SAAO | (14h 19m 06.91s , -10d 14m 28.5s) |   C |    60 | 17.1 |        
   31730 | 2025-05-12 20:10:27 |         MASTER-SAAO | (14h 19m 12.41s , -10d 13m 58.2s) |   C |    60 | 17.2 |        
   31809 | 2025-05-12 20:11:47 |         MASTER-SAAO | (14h 19m 09.57s , -10d 12m 28.8s) |   C |    60 | 17.2 |        
   31869 | 2025-05-12 20:11:47 |         MASTER-SAAO | (14h 19m 09.57s , -10d 12m 28.8s) |   C |   180 | 17.6 |  Coadd 
   31889 | 2025-05-12 20:13:06 |         MASTER-SAAO | (14h 19m 09.61s , -10d 13m 58.7s) |   C |    60 | 17.0 |        
   31968 | 2025-05-12 20:14:25 |         MASTER-SAAO | (14h 19m 12.16s , -10d 12m 34.3s) |   C |    60 | 17.0 |        
   32047 | 2025-05-12 20:15:44 |         MASTER-SAAO | (14h 19m 07.13s , -10d 13m 22.0s) |   C |    60 | 17.0 |        
   32107 | 2025-05-12 20:15:44 |         MASTER-SAAO | (14h 19m 07.14s , -10d 13m 22.0s) |   C |   180 | 17.6 |  Coadd 
   32126 | 2025-05-12 20:17:04 |         MASTER-SAAO | (14h 19m 05.72s , -10d 12m 20.9s) |   C |    60 | 17.1 |        
   32206 | 2025-05-12 20:18:24 |         MASTER-SAAO | (14h 19m 12.92s , -10d 13m 20.0s) |   C |    60 | 17.2 |        
   32286 | 2025-05-12 20:19:43 |         MASTER-SAAO | (14h 19m 06.56s , -10d 14m 18.8s) |   C |    60 | 17.0 |        
   32346 | 2025-05-12 20:19:43 |         MASTER-SAAO | (14h 19m 06.56s , -10d 14m 18.8s) |   C |   180 | 17.5 |  Coadd 
   32366 | 2025-05-12 20:21:04 |         MASTER-SAAO | (14h 19m 13.61s , -10d 14m 04.5s) |   C |    60 | 16.9 |        
   32446 | 2025-05-12 20:22:23 |         MASTER-SAAO | (14h 19m 11.06s , -10d 12m 36.7s) |   C |    60 | 17.0 |        
   32943 | 2025-05-12 20:30:40 |         MASTER-SAAO | (14h 19m 12.88s , -10d 12m 10.3s) |   C |    60 | 16.9 |        
   33003 | 2025-05-12 20:30:40 |         MASTER-SAAO | (14h 19m 12.88s , -10d 12m 10.3s) |   C |   180 | 17.4 |  Coadd 
   33022 | 2025-05-12 20:32:00 |         MASTER-SAAO | (14h 19m 18.93s , -10d 13m 09.3s) |   C |    60 | 16.8 |        
   33102 | 2025-05-12 20:33:19 |         MASTER-SAAO | (14h 19m 14.64s , -10d 14m 08.2s) |   C |    60 | 16.8 |        
   33181 | 2025-05-12 20:34:39 |         MASTER-SAAO | (14h 19m 21.08s , -10d 14m 06.4s) |   C |    60 | 16.9 |        
   33241 | 2025-05-12 20:34:39 |         MASTER-SAAO | (14h 19m 21.08s , -10d 14m 06.4s) |   C |   180 | 17.5 |  Coadd 
   33260 | 2025-05-12 20:35:58 |         MASTER-SAAO | (14h 19m 18.22s , -10d 12m 20.5s) |   C |    60 | 16.9 |        
   33340 | 2025-05-12 20:37:17 |         MASTER-SAAO | (14h 19m 18.96s , -10d 14m 01.5s) |   C |    60 | 16.8 |        
   33419 | 2025-05-12 20:38:37 |         MASTER-SAAO | (14h 19m 22.19s , -10d 12m 23.8s) |   C |    60 | 16.9 |        
   33499 | 2025-05-12 20:39:56 |         MASTER-SAAO | (14h 19m 16.86s , -10d 13m 02.6s) |   C |    60 | 16.8 |        
   33578 | 2025-05-12 20:41:16 |         MASTER-SAAO | (14h 19m 18.30s , -10d 12m 01.7s) |   C |    60 | 16.8 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12543
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 EP250512a ( EP Team et al., GCN 40437) errorbox  28318 sec after notice time and 31541 sec after trigger time at 2025-05-12 20:07:49 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 30 deg. The sun  altitude  is -54.2 deg. 

The galactic latitude b = 46 deg., longitude l = 337 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2868623

We obtain a following upper limits.  

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

   31571 | 2025-05-12 20:07:49 |         MASTER-SAAO | (14h 19m 12.13s , -10d 13m 30.1s) |   C |    60 | 17.2 |        
   31631 | 2025-05-12 20:07:49 |         MASTER-SAAO | (14h 19m 12.13s , -10d 13m 30.1s) |   C |   180 | 17.7 |  Coadd 
   31650 | 2025-05-12 20:09:08 |         MASTER-SAAO | (14h 19m 06.91s , -10d 14m 28.5s) |   C |    60 | 17.1 |        
   31730 | 2025-05-12 20:10:27 |         MASTER-SAAO | (14h 19m 12.41s , -10d 13m 58.2s) |   C |    60 | 17.2 |        
   31809 | 2025-05-12 20:11:47 |         MASTER-SAAO | (14h 19m 09.57s , -10d 12m 28.8s) |   C |    60 | 17.2 |        
   31869 | 2025-05-12 20:11:47 |         MASTER-SAAO | (14h 19m 09.57s , -10d 12m 28.8s) |   C |   180 | 17.6 |  Coadd 
   31889 | 2025-05-12 20:13:06 |         MASTER-SAAO | (14h 19m 09.61s , -10d 13m 58.7s) |   C |    60 | 17.0 |        
   31968 | 2025-05-12 20:14:25 |         MASTER-SAAO | (14h 19m 12.16s , -10d 12m 34.3s) |   C |    60 | 17.0 |        
   32047 | 2025-05-12 20:15:44 |         MASTER-SAAO | (14h 19m 07.13s , -10d 13m 22.0s) |   C |    60 | 17.0 |        
   32126 | 2025-05-12 20:17:04 |         MASTER-SAAO | (14h 19m 05.72s , -10d 12m 20.9s) |   C |    60 | 17.1 |        
   32206 | 2025-05-12 20:18:24 |         MASTER-SAAO | (14h 19m 12.92s , -10d 13m 20.0s) |   C |    60 | 17.2 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025