MASTER Net MASTER Database: GRB250526.81 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 GRB250526.81
Trignum 1748287703
Trigger time 2025-05-26 19:28:23
Notice time 2025-05-27 03:04:19.531073
Coord, eb (14h 28m 11.76s , -34d 21m 18.0s) , 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
2883070 2025-05-27 03:04:19.531073 14h 28m 11.76s -34d 21m 18.0s EP 0.01 alert 1748287703 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

2025-05-26 19:28:23 (JD 2460822.311377)

Siderial time 14.288828 h

Ra 14:28:11.76 Dec -34:21:18.00
(217.049000d, -34.355000d)

Rise 2025-05-27 18:52:35

Transit 2025-05-27 19:35:17

Set 2025-05-27 20:17:58

Amur

Object: Altitude: -24.08 Azimuth: 64.58

Sun: Altitude: -0.74 Azimuth: 234.37

Moon: Altitude: 5.28 Azimuth: 236.62

Tunka

Object: Altitude: -12.10 Azimuth: 48.63

Sun: Altitude: -10.39 Azimuth: 214.09

Moon: Altitude: -4.95 Azimuth: 217.54

Kislovodsk

Object: Altitude: 11.87 Azimuth: 1.85

Sun: Altitude: -21.32 Azimuth: 155.70

Moon: Altitude: -19.30 Azimuth: 162.20

Tavrida

Object: Altitude: 10.71 Azimuth: 354.69

Sun: Altitude: -17.58 Azimuth: 148.02

Moon: Altitude: -16.14 Azimuth: 154.57

SAAO

Object: Altitude: 73.60 Azimuth: 282.25

Sun: Altitude: -47.79 Azimuth: 86.49

Moon: Altitude: -54.10 Azimuth: 88.48

IAC

Object: Altitude: 7.47 Azimuth: 315.81

Sun: Altitude: 4.36 Azimuth: 111.79

Moon: Altitude: 1.58 Azimuth: 117.59

Argentina

Object: Altitude: 3.52 Azimuth: 308.84

Sun: Altitude: 22.36 Azimuth: 135.69

Moon: Altitude: 16.14 Azimuth: 134.00

Mexico

Object: Altitude: -65.23 Azimuth: 285.51

Sun: Altitude: 79.85 Azimuth: 15.01

Moon: Altitude: 80.25 Azimuth: 52.80

Ural

Object: Altitude: -2.82 Azimuth: 15.78

Sun: Altitude: -11.51 Azimuth: 173.09

Moon: Altitude: -8.08 Azimuth: 178.61

Vostryakovo

Object: Altitude: 0.24 Azimuth: 357.92

Sun: Altitude: -9.52 Azimuth: 152.73

Moon: Altitude: -7.32 Azimuth: 158.83

Gal. latitude: 23.932141 Gal. longitude: 325.261760

Dist. to Sun: 153.268765

Dist. to Moon: 159.694892

Moon coord.: (57.777488 d, 24.874060 d)

Sun coord.: (63.522684 d, 21.217336 d)

Lunar disk: 0.003171

Lunar phase: 173.543587

Lunar bright limb: 122.941788

No SN in this field

2025-05-27 03:04:19 (JD 2460822.627998)

Siderial time 21.908522 h

Ra 14:28:11.76 Dec -34:21:18.00
(217.049000d, -34.355000d)

Rise 2025-05-27 18:52:35

Transit 2025-05-27 19:35:17

Set 2025-05-27 20:17:58

Amur

Object: Altitude: -67.66 Azimuth: 232.57

Sun: Altitude: 60.65 Azimuth: 349.79

Moon: Altitude: 65.41 Azimuth: 350.41

Tunka

Object: Altitude: -72.41 Azimuth: 171.85

Sun: Altitude: 51.74 Azimuth: 311.65

Moon: Altitude: 56.20 Azimuth: 308.77

Kislovodsk

Object: Altitude: -41.01 Azimuth: 78.29

Sun: Altitude: 14.31 Azimuth: 254.09

Moon: Altitude: 18.04 Azimuth: 251.00

Tavrida

Object: Altitude: -35.32 Azimuth: 74.24

Sun: Altitude: 8.85 Azimuth: 248.74

Moon: Altitude: 12.73 Azimuth: 245.93

SAAO

Object: Altitude: 14.14 Azimuth: 58.04

Sun: Altitude: -29.30 Azimuth: 262.14

Moon: Altitude: -30.51 Azimuth: 256.82

IAC

Object: Altitude: 7.10 Azimuth: 44.53

Sun: Altitude: -32.27 Azimuth: 214.19

Moon: Altitude: -27.83 Azimuth: 212.17

Argentina

Object: Altitude: 85.35 Azimuth: 55.43

Sun: Altitude: -67.62 Azimuth: 67.38

Moon: Altitude: -70.55 Azimuth: 77.94

Mexico

Object: Altitude: 16.14 Azimuth: 329.32

Sun: Altitude: -9.94 Azimuth: 122.37

Moon: Altitude: -7.60 Azimuth: 126.58

Ural

Object: Altitude: -51.51 Azimuth: 105.83

Sun: Altitude: 26.75 Azimuth: 271.76

Moon: Altitude: 31.03 Azimuth: 269.35

Vostryakovo

Object: Altitude: -39.67 Azimuth: 84.89

Sun: Altitude: 14.61 Azimuth: 253.60

Moon: Altitude: 18.89 Azimuth: 251.41

Gal. latitude: 23.932141 Gal. longitude: 325.261760

Dist. to Sun: 153.054019

Dist. to Moon: 156.193366

Moon coord.: (62.917826 d, 25.961765 d)

Sun coord.: (63.843968 d, 21.270978 d)

Lunar disk: 0.001746

Lunar phase: 175.210476

Lunar bright limb: 169.372723

No SN in this field

2025-05-27 04:04:19 (JD 2460822.669664)

Siderial time 22.911260 h

Ra 14:28:11.76 Dec -34:21:18.00
(217.049000d, -34.355000d)

Rise 2025-05-27 18:52:35

Transit 2025-05-27 19:35:17

Set 2025-05-27 20:17:58

Amur

Object: Altitude: -59.11 Azimuth: 252.95

Sun: Altitude: 59.98 Azimuth: 18.19

Moon: Altitude: 64.60 Azimuth: 21.17

Tunka

Object: Altitude: -70.51 Azimuth: 211.15

Sun: Altitude: 57.39 Azimuth: 333.85

Moon: Altitude: 62.04 Azimuth: 331.37

Kislovodsk

Object: Altitude: -51.77 Azimuth: 87.29

Sun: Altitude: 24.94 Azimuth: 263.75

Moon: Altitude: 28.15 Azimuth: 259.73

Tavrida

Object: Altitude: -45.79 Azimuth: 83.06

Sun: Altitude: 19.07 Azimuth: 258.58

Moon: Altitude: 22.42 Azimuth: 254.87

SAAO

Object: Altitude: 3.78 Azimuth: 51.11

Sun: Altitude: -16.89 Azimuth: 255.14

Moon: Altitude: -18.94 Azimuth: 250.55

IAC

Object: Altitude: -2.80 Azimuth: 52.02

Sun: Altitude: -23.67 Azimuth: 226.68

Moon: Altitude: -19.96 Azimuth: 223.36

Argentina

Object: Altitude: 73.34 Azimuth: 75.88

Sun: Altitude: -77.69 Azimuth: 33.01

Moon: Altitude: -81.71 Azimuth: 48.21

Mexico

Object: Altitude: 21.56 Azimuth: 341.12

Sun: Altitude: -20.16 Azimuth: 132.25

Moon: Altitude: -16.78 Azimuth: 135.86

Ural

Object: Altitude: -58.94 Azimuth: 123.38

Sun: Altitude: 34.82 Azimuth: 285.07

Moon: Altitude: 38.89 Azimuth: 281.86

Vostryakovo

Object: Altitude: -48.20 Azimuth: 97.45

Sun: Altitude: 22.98 Azimuth: 265.43

Moon: Altitude: 26.92 Azimuth: 262.38

Gal. latitude: 23.932141 Gal. longitude: 325.261760

Dist. to Sun: 153.025641

Dist. to Moon: 155.702884

Moon coord.: (63.599866 d, 26.091148 d)

Sun coord.: (63.886263 d, 21.277992 d)

Lunar disk: 0.001784

Lunar phase: 175.158375

Lunar bright limb: 176.766151

No SN in this field

2025-05-30 13:44:44 (JD 2460826.072731)

Siderial time 8.808486 h

Ra 14:28:11.76 Dec -34:21:18.00
(217.049000d, -34.355000d)

Rise 2025-05-31 18:36:52

Transit 2025-05-31 19:19:33

Set 2025-05-31 20:02:14

Amur

Object: Altitude: 5.21 Azimuth: 4.10

Sun: Altitude: -14.46 Azimuth: 155.76

Moon: Altitude: 11.24 Azimuth: 116.07

Tunka

Object: Altitude: 2.16 Azimuth: 344.01

Sun: Altitude: -4.51 Azimuth: 134.68

Moon: Altitude: 26.28 Azimuth: 98.01

Kislovodsk

Object: Altitude: -16.67 Azimuth: 301.93

Sun: Altitude: 29.33 Azimuth: 92.99

Moon: Altitude: 66.19 Azimuth: 44.67

Tavrida

Object: Altitude: -22.46 Azimuth: 296.74

Sun: Altitude: 35.42 Azimuth: 86.41

Moon: Altitude: 68.89 Azimuth: 25.25

SAAO

Object: Altitude: 9.24 Azimuth: 305.02

Sun: Altitude: 19.02 Azimuth: 133.16

Moon: Altitude: 32.36 Azimuth: 183.68

IAC

Object: Altitude: -54.74 Azimuth: 290.40

Sun: Altitude: 78.39 Azimuth: 58.44

Moon: Altitude: 53.63 Azimuth: 265.23

Argentina

Object: Altitude: -22.91 Azimuth: 10.62

Sun: Altitude: 22.89 Azimuth: 222.57

Moon: Altitude: -15.78 Azimuth: 249.84

Mexico

Object: Altitude: -45.85 Azimuth: 71.01

Sun: Altitude: 16.59 Azimuth: 254.14

Moon: Altitude: -18.99 Azimuth: 222.94

Ural

Object: Altitude: -15.64 Azimuth: 310.20

Sun: Altitude: 19.93 Azimuth: 99.63

Moon: Altitude: 49.35 Azimuth: 53.39

Vostryakovo

Object: Altitude: -24.92 Azimuth: 294.98

Sun: Altitude: 31.94 Azimuth: 82.40

Moon: Altitude: 58.19 Azimuth: 23.74

Gal. latitude: 23.932141 Gal. longitude: 325.261760

Dist. to Sun: 150.624774

Dist. to Moon: 110.347276

Moon coord.: (118.756362 d, 25.162265 d)

Sun coord.: (67.351642 d, 21.814547 d)

Lunar disk: 0.159493

Lunar phase: 132.923004

Lunar bright limb: 277.193674

No SN in this field
Recent coverage and limits telegrams

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

  ID = 12619
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) was pointed to the EP250526a ( EP Team et al., GCN 40550) errorbox  15422 sec after notice time and 42778 sec after trigger time at 2025-05-27 07:21:21 UT, with upper limit up to  18.8 mag. The observations began at zenith distance = 57 deg. The sun  altitude  is -51.0 deg. 

The galactic latitude b = 24 deg., longitude l = 325 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2883070

We obtain a following upper limits.  

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

   42809 | 2025-05-27 07:21:21 |         MASTER-OAFA | (14h 28m 05.95s , -34d 00m 45.3s) |   C |    60 | 18.6 |        
   43753 | 2025-05-27 07:37:05 |         MASTER-OAFA | (14h 28m 00.39s , -34d 00m 01.3s) |   C |    60 | 18.4 |        
   43913 | 2025-05-27 07:39:45 |         MASTER-OAFA | (14h 28m 00.57s , -34d 02m 03.5s) |   C |    60 | 18.6 |        
   44071 | 2025-05-27 07:42:24 |         MASTER-OAFA | (14h 28m 03.16s , -34d 00m 23.3s) |   C |    60 | 18.6 |        
   44461 | 2025-05-27 07:48:54 |         MASTER-OAFA | (14h 28m 05.99s , -34d 01m 18.4s) |   C |    60 | 18.8 |        
   44616 | 2025-05-27 07:51:29 |         MASTER-OAFA | (14h 28m 06.14s , -34d 02m 09.2s) |   C |    60 | 18.3 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12617
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) was pointed to the EP250526a ( EP Team et al., GCN 40550) errorbox  15422 sec after notice time and 42778 sec after trigger time at 2025-05-27 07:21:21 UT, with upper limit up to  18.6 mag. The observations began at zenith distance = 57 deg. The sun  altitude  is -51.0 deg. 

The galactic latitude b = 24 deg., longitude l = 325 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2883070

We obtain a following upper limits.  

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

   42809 | 2025-05-27 07:21:21 |         MASTER-OAFA | (14h 28m 05.95s , -34d 00m 45.3s) |   C |    60 | 18.6 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12616
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) was pointed to the EP250526a ( EP Team et al., GCN 40550) errorbox  15422 sec after notice time and 42778 sec after trigger time at 2025-05-27 07:21:21 UT, with upper limit up to  18.6 mag. The observations began at zenith distance = 57 deg. The sun  altitude  is -51.0 deg. 

The galactic latitude b = 24 deg., longitude l = 325 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2883070

We obtain a following upper limits.  

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

   42809 | 2025-05-27 07:21:21 |         MASTER-OAFA | (14h 28m 05.95s , -34d 00m 45.3s) |   C |    60 | 18.6 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12615
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) was pointed to the EP250526a ( EP Team et al., GCN 40550) errorbox  15422 sec after notice time and 42778 sec after trigger time at 2025-05-27 07:21:21 UT, with upper limit up to  18.6 mag. The observations began at zenith distance = 57 deg. The sun  altitude  is -51.0 deg. 

The galactic latitude b = 24 deg., longitude l = 325 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2883070

We obtain a following upper limits.  

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

   42809 | 2025-05-27 07:21:21 |         MASTER-OAFA | (14h 28m 05.95s , -34d 00m 45.3s) |   C |    60 | 18.6 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025