MASTER Net MASTER Database: GRB250521.93 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 GRB250521.93
Trignum 769558921
Trigger time 2025-05-21 22:21:56.01
Notice time 2025-05-21 22:31:42.296541
Coord, eb (18h 46m 24.00s , +21d 19m 12.0s) , 2.57
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
2877804 2025-05-21 22:31:42.296541 18h 46m 24.00s +21d 19m 12.0s FERMI 2.57 alert 769558921 5 115 alert
2877796 2025-05-21 22:24:40.156656 18h 49m 28.80s +20d 56m 24.0s FERMI 2.79 alert 769558921 10 112 alert
2877766 2025-05-21 22:23:19.100424 19h 08m 48.00s +21d 16m 59.9s FERMI 7.6667 alert 769558921 27 111 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory camera links
79.2 2025-05-21 22:20:25.171 00h 00m 00.00s +00d 00m 00.0s OAFA 29008 Database OAFA
79.2 2025-05-21 22:18:58.283 00h 00m 00.00s +00d 00m 00.0s OAFA 111342 Database OAFA
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2025-05-21 22:21:56 (JD 2460817.431898)

Siderial time 16.860699 h

Ra 18:46:24.00 Dec 21:19:12.00
(281.600000d, 21.320000d)

Rise 2025-05-22 15:48:36

Transit 2025-05-22 00:16:23

Set 2025-05-22 08:40:13

Amur

Object: Altitude: 34.51 Azimuth: 82.08

Sun: Altitude: 24.45 Azimuth: 267.17

Moon: Altitude: 34.50 Azimuth: 351.15

Tunka

Object: Altitude: 48.35 Azimuth: 57.02

Sun: Altitude: 9.77 Azimuth: 249.46

Moon: Altitude: 27.26 Azimuth: 323.88

Kislovodsk

Object: Altitude: 60.14 Azimuth: 311.02

Sun: Altitude: -23.56 Azimuth: 199.68

Moon: Altitude: -4.97 Azimuth: 271.92

Tavrida

Object: Altitude: 54.62 Azimuth: 300.74

Sun: Altitude: -24.22 Azimuth: 191.02

Moon: Altitude: -11.04 Azimuth: 265.82

SAAO

Object: Altitude: 20.90 Azimuth: 225.33

Sun: Altitude: -77.73 Azimuth: 11.08

Moon: Altitude: -17.28 Azimuth: 287.55

IAC

Object: Altitude: 15.96 Azimuth: 254.01

Sun: Altitude: -28.01 Azimuth: 137.14

Moon: Altitude: -54.04 Azimuth: 234.56

Argentina

Object: Altitude: -49.25 Azimuth: 273.69

Sun: Altitude: -8.41 Azimuth: 108.74

Moon: Altitude: -46.77 Azimuth: 36.49

Mexico

Object: Altitude: -37.53 Azimuth: 183.89

Sun: Altitude: 47.23 Azimuth: 86.90

Moon: Altitude: -23.68 Azimuth: 99.03

Ural

Object: Altitude: 53.94 Azimuth: 349.25

Sun: Altitude: -6.91 Azimuth: 213.94

Moon: Altitude: 3.87 Azimuth: 285.02

Vostryakovo

Object: Altitude: 49.85 Azimuth: 316.43

Sun: Altitude: -13.30 Azimuth: 193.96

Moon: Altitude: -7.93 Azimuth: 266.99

Gal. latitude: 10.177618 Gal. longitude: 51.844932

Dist. to Sun: 120.843776

Dist. to Moon: 71.949868

Moon coord.: (350.088571 d, -4.817888 d)

Sun coord.: (58.599729 d, 20.314602 d)

Lunar disk: 0.344782

Lunar phase: 108.085534

Lunar bright limb: 66.752850

No SN in this field

2025-05-21 22:31:42 (JD 2460817.438681)

Siderial time 17.023922 h

Ra 18:46:24.00 Dec 21:19:12.00
(281.600000d, 21.320000d)

Rise 2025-05-22 15:48:36

Transit 2025-05-22 00:16:23

Set 2025-05-22 08:40:13

Amur

Object: Altitude: 32.96 Azimuth: 84.09

Sun: Altitude: 26.00 Azimuth: 269.03

Moon: Altitude: 34.74 Azimuth: 353.99

Tunka

Object: Altitude: 47.06 Azimuth: 59.81

Sun: Altitude: 11.20 Azimuth: 251.29

Moon: Altitude: 28.14 Azimuth: 326.35

Kislovodsk

Object: Altitude: 61.43 Azimuth: 314.87

Sun: Altitude: -22.93 Azimuth: 202.07

Moon: Altitude: -3.23 Azimuth: 273.51

Tavrida

Object: Altitude: 56.09 Azimuth: 303.80

Sun: Altitude: -23.85 Azimuth: 193.49

Moon: Altitude: -9.33 Azimuth: 267.47

SAAO

Object: Altitude: 22.35 Azimuth: 223.44

Sun: Altitude: -77.94 Azimuth: 0.25

Moon: Altitude: -15.40 Azimuth: 286.07

IAC

Object: Altitude: 18.03 Azimuth: 254.99

Sun: Altitude: -29.44 Azimuth: 139.18

Moon: Altitude: -52.29 Azimuth: 237.19

Argentina

Object: Altitude: -47.17 Azimuth: 272.27

Sun: Altitude: -10.39 Azimuth: 107.56

Moon: Altitude: -47.96 Azimuth: 33.48

Mexico

Object: Altitude: -37.34 Azimuth: 186.75

Sun: Altitude: 45.14 Azimuth: 88.25

Moon: Altitude: -25.65 Azimuth: 100.45

Ural

Object: Altitude: 54.14 Azimuth: 353.12

Sun: Altitude: -6.15 Azimuth: 216.12

Moon: Altitude: 5.15 Azimuth: 287.00

Vostryakovo

Object: Altitude: 50.78 Azimuth: 319.69

Sun: Altitude: -12.94 Azimuth: 196.29

Moon: Altitude: -6.55 Azimuth: 268.91

Gal. latitude: 10.177618 Gal. longitude: 51.844932

Dist. to Sun: 120.847588

Dist. to Moon: 72.007967

Moon coord.: (350.172829 d, -4.773004 d)

Sun coord.: (58.606533 d, 20.315954 d)

Lunar disk: 0.344049

Lunar phase: 108.173948

Lunar bright limb: 66.748598

No SN in this field

2025-05-21 23:31:42 (JD 2460817.480347)

Siderial time 18.026660 h

Ra 18:46:24.00 Dec 21:19:12.00
(281.600000d, 21.320000d)

Rise 2025-05-22 15:48:36

Transit 2025-05-22 00:16:23

Set 2025-05-22 08:40:13

Amur

Object: Altitude: 23.37 Azimuth: 95.70

Sun: Altitude: 35.54 Azimuth: 281.09

Moon: Altitude: 34.57 Azimuth: 11.62

Tunka

Object: Altitude: 38.48 Azimuth: 74.97

Sun: Altitude: 20.22 Azimuth: 262.51

Moon: Altitude: 32.29 Azimuth: 342.42

Kislovodsk

Object: Altitude: 66.97 Azimuth: 344.86

Sun: Altitude: -17.66 Azimuth: 215.98

Moon: Altitude: 7.33 Azimuth: 283.44

Tavrida

Object: Altitude: 63.60 Azimuth: 327.64

Sun: Altitude: -20.06 Azimuth: 208.10

Moon: Altitude: 1.16 Azimuth: 277.49

SAAO

Object: Altitude: 29.99 Azimuth: 210.34

Sun: Altitude: -72.02 Azimuth: 308.43

Moon: Altitude: -3.56 Azimuth: 277.61

IAC

Object: Altitude: 30.98 Azimuth: 260.89

Sun: Altitude: -36.79 Azimuth: 153.53

Moon: Altitude: -40.66 Azimuth: 249.82

Argentina

Object: Altitude: -34.41 Azimuth: 264.62

Sun: Altitude: -22.75 Azimuth: 100.55

Moon: Altitude: -53.05 Azimuth: 12.06

Mexico

Object: Altitude: -33.95 Azimuth: 203.50

Sun: Altitude: 32.31 Azimuth: 95.68

Moon: Altitude: -37.49 Azimuth: 110.28

Ural

Object: Altitude: 53.42 Azimuth: 16.91

Sun: Altitude: -0.62 Azimuth: 229.07

Moon: Altitude: 12.63 Azimuth: 299.56

Vostryakovo

Object: Altitude: 54.95 Azimuth: 341.95

Sun: Altitude: -9.57 Azimuth: 210.21

Moon: Altitude: 1.88 Azimuth: 280.70

Gal. latitude: 10.177618 Gal. longitude: 51.844932

Dist. to Sun: 120.871000

Dist. to Moon: 72.365836

Moon coord.: (350.690568 d, -4.496862 d)

Sun coord.: (58.648336 d, 20.324255 d)

Lunar disk: 0.339549

Lunar phase: 108.717509

Lunar bright limb: 66.724233

No SN in this field

2025-05-30 12:42:26 (JD 2460826.029468)

Siderial time 7.767310 h

Ra 18:46:24.00 Dec 21:19:12.00
(281.600000d, 21.320000d)

Rise 2025-05-31 15:13:13

Transit 2025-05-31 23:37:03

Set 2025-05-31 08:04:50

Amur

Object: Altitude: 25.56 Azimuth: 266.87

Sun: Altitude: -9.32 Azimuth: 141.94

Moon: Altitude: 20.27 Azimuth: 105.57

Tunka

Object: Altitude: 10.91 Azimuth: 249.28

Sun: Altitude: 3.01 Azimuth: 122.33

Moon: Altitude: 35.61 Azimuth: 86.55

Kislovodsk

Object: Altitude: -22.44 Azimuth: 199.98

Sun: Altitude: 40.55 Azimuth: 81.83

Moon: Altitude: 71.36 Azimuth: 9.37

Tavrida

Object: Altitude: -23.15 Azimuth: 191.46

Sun: Altitude: 46.30 Azimuth: 73.76

Moon: Altitude: 70.12 Azimuth: 346.04

SAAO

Object: Altitude: -78.81 Azimuth: 9.15

Sun: Altitude: 27.59 Azimuth: 145.86

Moon: Altitude: 29.70 Azimuth: 199.19

IAC

Object: Altitude: -27.59 Azimuth: 138.35

Sun: Altitude: 82.12 Azimuth: 324.42

Moon: Altitude: 40.60 Azimuth: 259.76

Argentina

Object: Altitude: -9.41 Azimuth: 109.32

Sun: Altitude: 13.02 Azimuth: 233.69

Moon: Altitude: -28.01 Azimuth: 256.13

Mexico

Object: Altitude: 47.12 Azimuth: 88.58

Sun: Altitude: 4.01 Azimuth: 246.89

Moon: Altitude: -26.59 Azimuth: 210.76

Ural

Object: Altitude: -5.78 Azimuth: 214.15

Sun: Altitude: 28.37 Azimuth: 86.75

Moon: Altitude: 55.07 Azimuth: 33.25

Vostryakovo

Object: Altitude: -12.22 Azimuth: 194.38

Sun: Altitude: 40.47 Azimuth: 67.90

Moon: Altitude: 59.90 Azimuth: 357.45

Gal. latitude: 10.177618 Gal. longitude: 51.844932

Dist. to Sun: 125.414180

Dist. to Moon: 130.696846

Moon coord.: (118.114297 d, 25.302822 d)

Sun coord.: (67.307462 d, 21.808181 d)

Lunar disk: 0.155972

Lunar phase: 133.476398

Lunar bright limb: 276.862319

No SN in this field
Recent coverage and limits telegrams

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

  ID = 12610
TYPE = 35
DAYS = 2


MASTER-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the FERMI GRB 250521D ( Fermi GBM team, GCN 40516) errorbox  69766 sec after notice time and 69806 sec after trigger time at 2025-05-22 17:45:22 UT, with upper limit up to  19.4 mag. The observations began at zenith distance = 38 deg. The sun  altitude  is -17.9 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the FERMI GRB 250521D errorbox  74439 sec after notice time and 74480 sec after trigger time at 2025-05-22 19:03:16 UT, with upper limit up to  18.3 mag. The observations began at zenith distance = 63 deg. The sun  altitude  is -20.4 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 250521D errorbox  1 days 82768 sec after notice time and 1 days 82809 sec after trigger time at 2025-05-23 21:22:05 UT, with upper limit up to  18.4 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -70.1 deg. 

The galactic latitude b = 10 deg., longitude l = 52 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2877798

We obtain a following upper limits.  

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

   69810 | 2025-05-22 17:45:22 |        MASTER-Tunka | (18h 54m 35.08s , +23d 23m 49.9s) |   C |     6 | 16.9 |        
   74510 | 2025-05-22 19:03:16 |   MASTER-Kislovodsk | (18h 46m 09.15s , +22d 14m 31.3s) |   C |    60 | 17.9 |        
   74594 | 2025-05-22 19:04:40 |   MASTER-Kislovodsk | (18h 54m 44.61s , +22d 15m 50.5s) |   C |    60 | 17.4 |        
   74879 | 2025-05-22 19:09:25 |   MASTER-Kislovodsk | (18h 31m 37.29s , +20d 22m 21.4s) |   C |    60 | 18.2 |        
   74962 | 2025-05-22 19:10:48 |   MASTER-Kislovodsk | (18h 40m 08.81s , +20d 23m 00.2s) |   C |    60 | 17.8 |        
   75252 | 2025-05-22 19:15:37 |   MASTER-Kislovodsk | (18h 46m 02.01s , +22d 15m 17.9s) |   C |    60 | 16.9 |        
   75343 | 2025-05-22 19:17:08 |   MASTER-Kislovodsk | (18h 54m 46.14s , +22d 14m 48.8s) |   C |    60 | 17.8 |        
   75628 | 2025-05-22 19:21:54 |   MASTER-Kislovodsk | (18h 31m 39.68s , +20d 22m 13.8s) |   C |    60 | 18.1 |        
   75711 | 2025-05-22 19:23:16 |   MASTER-Kislovodsk | (18h 40m 14.15s , +20d 23m 35.2s) |   C |    60 | 17.8 |        
   76001 | 2025-05-22 19:28:07 |   MASTER-Kislovodsk | (18h 46m 02.06s , +22d 17m 32.5s) |   C |    60 | 17.7 |        
   76084 | 2025-05-22 19:29:29 |   MASTER-Kislovodsk | (18h 54m 45.46s , +22d 16m 10.7s) |   C |    60 | 17.7 |        
   76372 | 2025-05-22 19:34:17 |   MASTER-Kislovodsk | (18h 31m 43.25s , +20d 22m 53.4s) |   C |    60 | 18.1 |        
   76455 | 2025-05-22 19:35:41 |   MASTER-Kislovodsk | (18h 40m 11.56s , +20d 24m 08.0s) |   C |    60 | 17.8 |        
   76739 | 2025-05-22 19:40:24 |   MASTER-Kislovodsk | (18h 46m 07.36s , +22d 17m 42.9s) |   C |    60 | 17.8 |        
   76822 | 2025-05-22 19:41:47 |   MASTER-Kislovodsk | (18h 54m 40.60s , +22d 16m 47.2s) |   C |    60 | 17.8 |        
   76903 | 2025-05-22 19:43:08 |   MASTER-Kislovodsk | (18h 29m 41.52s , +22d 18m 03.0s) |   C |    60 | 17.9 |        
   76986 | 2025-05-22 19:44:31 |   MASTER-Kislovodsk | (18h 38m 14.77s , +22d 16m 41.7s) |   C |    60 | 17.8 |        
   77068 | 2025-05-22 19:45:54 |   MASTER-Kislovodsk | (18h 31m 40.38s , +20d 23m 17.2s) |   C |    60 | 17.9 |        
   77152 | 2025-05-22 19:47:17 |   MASTER-Kislovodsk | (18h 40m 10.81s , +20d 24m 27.4s) |   C |    60 | 17.9 |        
   77234 | 2025-05-22 19:48:39 |   MASTER-Kislovodsk | (18h 47m 52.94s , +20d 24m 02.5s) |   C |    60 | 17.7 |        
   77317 | 2025-05-22 19:50:03 |   MASTER-Kislovodsk | (18h 56m 20.02s , +20d 23m 08.0s) |   C |    60 | 17.5 |        
   77399 | 2025-05-22 19:51:25 |   MASTER-Kislovodsk | (18h 45m 59.84s , +22d 18m 39.9s) |   C |    60 | 17.3 |        
   77482 | 2025-05-22 19:52:48 |   MASTER-Kislovodsk | (18h 54m 44.96s , +22d 17m 19.2s) |   C |    60 | 17.7 |        
   77565 | 2025-05-22 19:54:10 |   MASTER-Kislovodsk | (18h 29m 34.62s , +22d 17m 33.1s) |   C |    60 | 17.7 |        
   77649 | 2025-05-22 19:55:35 |   MASTER-Kislovodsk | (18h 38m 19.02s , +22d 17m 33.2s) |   C |    60 | 17.8 |        
   77731 | 2025-05-22 19:56:57 |   MASTER-Kislovodsk | (18h 31m 37.42s , +20d 25m 11.9s) |   C |    60 | 18.0 |        
   77813 | 2025-05-22 19:58:19 |   MASTER-Kislovodsk | (18h 40m 10.02s , +20d 23m 31.4s) |   C |    60 | 17.6 |        
   77896 | 2025-05-22 19:59:41 |   MASTER-Kislovodsk | (18h 47m 51.21s , +20d 24m 47.4s) |   C |    60 | 17.9 |        
   77977 | 2025-05-22 20:01:02 |   MASTER-Kislovodsk | (18h 56m 17.56s , +20d 23m 39.8s) |   C |    60 | 17.8 |        
   78061 | 2025-05-22 20:02:27 |   MASTER-Kislovodsk | (18h 45m 59.81s , +22d 19m 12.4s) |   C |    60 | 17.8 |        
   78145 | 2025-05-22 20:03:50 |   MASTER-Kislovodsk | (18h 54m 42.17s , +22d 17m 52.4s) |   C |    60 | 17.8 |        
   78229 | 2025-05-22 20:05:14 |   MASTER-Kislovodsk | (18h 29m 32.68s , +22d 18m 03.6s) |   C |    60 | 18.0 |        
   78406 | 2025-05-22 20:08:12 |   MASTER-Kislovodsk | (18h 38m 14.34s , +22d 18m 42.2s) |   C |    60 | 17.8 |        
   78669 | 2025-05-22 20:12:34 |   MASTER-Kislovodsk | (18h 31m 38.03s , +20d 25m 46.9s) |   C |    60 | 18.0 |        
   78752 | 2025-05-22 20:13:58 |   MASTER-Kislovodsk | (18h 40m 05.15s , +20d 24m 24.8s) |   C |    60 | 17.8 |        
   78834 | 2025-05-22 20:15:20 |   MASTER-Kislovodsk | (18h 47m 51.60s , +20d 24m 27.8s) |   C |    60 | 17.9 |        
   78916 | 2025-05-22 20:16:42 |   MASTER-Kislovodsk | (18h 56m 19.85s , +20d 25m 26.9s) |   C |    60 | 17.7 |        
   79000 | 2025-05-22 20:18:06 |   MASTER-Kislovodsk | (18h 29m 37.27s , +22d 20m 41.3s) |   C |    60 | 17.8 |        
   79178 | 2025-05-22 20:21:04 |   MASTER-Kislovodsk | (18h 38m 11.62s , +22d 18m 45.4s) |   C |    60 | 17.9 |        
   79607 | 2025-05-22 20:28:12 |   MASTER-Kislovodsk | (18h 47m 48.78s , +20d 24m 52.5s) |   C |    60 | 17.9 |        
   79690 | 2025-05-22 20:29:36 |   MASTER-Kislovodsk | (18h 56m 19.10s , +20d 26m 25.2s) |   C |    60 | 17.9 |        
   79872 | 2025-05-22 20:32:37 |   MASTER-Kislovodsk | (18h 29m 31.64s , +22d 20m 40.2s) |   C |    60 | 17.9 |        
   79962 | 2025-05-22 20:34:08 |   MASTER-Kislovodsk | (18h 38m 09.84s , +22d 19m 17.9s) |   C |    60 | 17.8 |        
   80394 | 2025-05-22 20:41:19 |   MASTER-Kislovodsk | (18h 47m 49.36s , +20d 25m 48.9s) |   C |    60 | 17.5 |        
   80477 | 2025-05-22 20:42:42 |   MASTER-Kislovodsk | (18h 56m 17.51s , +20d 26m 53.5s) |   C |    60 | 17.8 |        
   80739 | 2025-05-22 20:47:05 |   MASTER-Kislovodsk | (18h 29m 30.95s , +22d 22m 18.1s) |   C |    60 | 17.9 |        
   80829 | 2025-05-22 20:48:35 |   MASTER-Kislovodsk | (18h 38m 16.47s , +22d 20m 24.5s) |   C |    60 | 17.9 |        
   81109 | 2025-05-22 20:53:14 |   MASTER-Kislovodsk | (18h 47m 46.76s , +20d 26m 20.8s) |   C |    60 | 18.0 |        
   81286 | 2025-05-22 20:56:11 |   MASTER-Kislovodsk | (18h 56m 15.11s , +20d 26m 36.8s) |   C |    60 | 17.9 |        
   81473 | 2025-05-22 20:59:18 |   MASTER-Kislovodsk | (18h 45m 25.79s , +24d 15m 57.0s) |   C |    60 | 18.0 |        
   81557 | 2025-05-22 21:00:43 |   MASTER-Kislovodsk | (18h 54m 06.25s , +24d 14m 44.2s) |   C |    60 | 17.9 |        
   81668 | 2025-05-22 21:02:33 |   MASTER-Kislovodsk | (18h 34m 45.97s , +18d 33m 38.2s) |   C |    60 | 18.0 |        
   81751 | 2025-05-22 21:03:56 |   MASTER-Kislovodsk | (18h 43m 05.28s , +18d 32m 22.4s) |   C |    60 | 18.1 |        
   81921 | 2025-05-22 21:06:47 |   MASTER-Kislovodsk | (18h 37m 32.39s , +24d 16m 12.0s) |   C |    60 | 18.1 |        
   82188 | 2025-05-22 21:11:13 |   MASTER-Kislovodsk | (18h 45m 18.82s , +24d 15m 19.0s) |   C |    60 | 18.1 |        
   82270 | 2025-05-22 21:12:35 |   MASTER-Kislovodsk | (18h 54m 05.37s , +24d 16m 01.0s) |   C |    60 | 17.9 |        
   82375 | 2025-05-22 21:14:21 |   MASTER-Kislovodsk | (18h 34m 43.84s , +18d 33m 54.3s) |   C |    60 | 18.0 |        
   82457 | 2025-05-22 21:15:43 |   MASTER-Kislovodsk | (18h 43m 05.33s , +18d 32m 37.5s) |   C |    60 | 18.1 |        
   90925 | 2025-05-22 23:36:51 |   MASTER-Kislovodsk | (18h 37m 16.45s , +24d 20m 01.0s) |   C |    60 | 18.2 |        
   91186 | 2025-05-22 23:41:11 |   MASTER-Kislovodsk | (18h 45m 14.20s , +24d 18m 13.9s) |   C |    60 | 18.3 |        
   91957 | 2025-05-22 23:54:02 |   MASTER-Kislovodsk | (18h 53m 53.46s , +24d 17m 08.9s) |   C |    60 | 18.1 |        
   92049 | 2025-05-22 23:55:34 |   MASTER-Kislovodsk | (18h 35m 38.19s , +18d 27m 39.1s) |   C |    60 | 18.1 |        
   92131 | 2025-05-22 23:56:56 |   MASTER-Kislovodsk | (18h 44m 06.43s , +18d 28m 57.7s) |   C |    60 | 18.2 |        
   92298 | 2025-05-22 23:59:43 |   MASTER-Kislovodsk | (18h 38m 22.52s , +24d 10m 02.3s) |   C |    60 | 18.2 |        
   92549 | 2025-05-23 00:03:55 |   MASTER-Kislovodsk | (18h 46m 13.53s , +24d 10m 45.7s) |   C |    60 | 18.1 |        
   92632 | 2025-05-23 00:05:18 |   MASTER-Kislovodsk | (18h 54m 57.95s , +24d 09m 15.2s) |   C |    60 | 18.0 |        
   92718 | 2025-05-23 00:06:43 |   MASTER-Kislovodsk | (18h 35m 36.00s , +18d 28m 03.7s) |   C |    60 | 17.7 |        
   92810 | 2025-05-23 00:08:16 |   MASTER-Kislovodsk | (18h 44m 01.38s , +18d 29m 04.4s) |   C |    60 | 18.1 |        
   92980 | 2025-05-23 00:11:05 |   MASTER-Kislovodsk | (18h 38m 22.17s , +24d 08m 57.6s) |   C |    60 | 18.1 |        
   93225 | 2025-05-23 00:15:11 |   MASTER-Kislovodsk | (18h 46m 15.96s , +24d 10m 32.0s) |   C |    60 | 17.9 |        
   93309 | 2025-05-23 00:16:34 |   MASTER-Kislovodsk | (18h 54m 56.67s , +24d 09m 50.1s) |   C |    60 | 17.6 |        
   93393 | 2025-05-23 00:17:58 |   MASTER-Kislovodsk | (18h 35m 36.00s , +18d 28m 55.9s) |   C |    60 | 17.9 |        
   93474 | 2025-05-23 00:19:20 |   MASTER-Kislovodsk | (18h 44m 06.06s , +18d 27m 58.9s) |   C |    60 | 17.8 |        
   93639 | 2025-05-23 00:22:05 |   MASTER-Kislovodsk | (18h 38m 20.53s , +24d 09m 07.0s) |   C |    60 | 17.6 |        
   93888 | 2025-05-23 00:26:14 |   MASTER-Kislovodsk | (18h 51m 36.15s , +18d 27m 56.5s) |   C |    60 | 17.5 |        
   93971 | 2025-05-23 00:27:37 |   MASTER-Kislovodsk | (19h 00m 02.59s , +18d 28m 57.2s) |   C |    60 | 17.3 |        
   94562 | 2025-05-23 00:37:27 |   MASTER-Kislovodsk | (18h 51m 36.67s , +18d 26m 53.1s) |   C |    60 | 16.8 |        
   94646 | 2025-05-23 00:38:52 |   MASTER-Kislovodsk | (19h 00m 08.02s , +18d 26m 58.0s) |   C |    60 | 16.7 |        
  161076 | 2025-05-23 19:06:02 |        MASTER-Tunka | (18h 31m 21.58s , +22d 33m 48.0s) |   C |    60 | 19.4 |        
  161076 | 2025-05-23 19:06:02 |             MASTER- | (18h 42m 58.04s , +22d 30m 26.7s) |   C |    60 | 19.4 |        
  161148 | 2025-05-23 19:07:14 |        MASTER-Tunka | (18h 29m 20.91s , +22d 33m 53.3s) |   C |    60 | 19.4 |        
  161148 | 2025-05-23 19:07:14 |             MASTER- | (18h 40m 57.37s , +22d 30m 32.6s) |   C |    60 | 19.4 |        
  161222 | 2025-05-23 19:08:27 |        MASTER-Tunka | (18h 34m 27.68s , +22d 33m 38.7s) |   C |    60 | 19.3 |        
  161222 | 2025-05-23 19:08:27 |             MASTER- | (18h 46m 04.09s , +22d 30m 17.6s) |   C |    60 | 19.4 |        
  161297 | 2025-05-23 19:09:43 |             MASTER- | (18h 40m 14.68s , +23d 25m 09.9s) |   C |    60 | 19.5 |        
  161573 | 2025-05-23 19:14:18 |             MASTER- | (18h 40m 47.26s , +25d 18m 21.9s) |   C |    60 | 19.5 |        
  161823 | 2025-05-23 19:18:28 |        MASTER-Tunka | (18h 31m 20.77s , +23d 08m 09.1s) |   C |    60 | 17.1 |        
  161823 | 2025-05-23 19:18:28 |             MASTER- | (18h 43m 00.21s , +23d 04m 48.2s) |   C |    60 | 17.1 |        
  161897 | 2025-05-23 19:19:42 |        MASTER-Tunka | (18h 29m 19.03s , +23d 07m 45.2s) |   C |    60 | 18.9 |        
  161897 | 2025-05-23 19:19:42 |             MASTER- | (18h 40m 58.38s , +23d 04m 25.3s) |   C |    60 | 18.8 |        
  161971 | 2025-05-23 19:20:57 |        MASTER-Tunka | (18h 34m 25.86s , +23d 07m 06.5s) |   C |    60 | 18.1 |        
  161971 | 2025-05-23 19:20:57 |             MASTER- | (18h 46m 05.10s , +23d 03m 46.3s) |   C |    60 | 18.0 |        
  162045 | 2025-05-23 19:22:11 |             MASTER- | (18h 40m 15.22s , +23d 24m 40.3s) |   C |    60 | 19.0 |        
  169239 | 2025-05-23 21:22:05 |         MASTER-SAAO | (18h 44m 02.56s , +22d 04m 42.5s) |   C |    60 | 17.8 |        
  169319 | 2025-05-23 21:23:24 |         MASTER-SAAO | (18h 52m 35.29s , +22d 03m 48.0s) |   C |    60 | 17.8 |        
  169398 | 2025-05-23 21:24:43 |         MASTER-SAAO | (18h 29m 41.00s , +20d 10m 53.2s) |   C |    60 | 18.3 |        
  169477 | 2025-05-23 21:26:03 |         MASTER-SAAO | (18h 38m 06.64s , +20d 09m 34.7s) |   C |    60 | 18.1 |        
  169556 | 2025-05-23 21:27:22 |         MASTER-SAAO | (18h 27m 36.97s , +22d 05m 36.6s) |   C |    60 | 18.1 |        
  169635 | 2025-05-23 21:28:41 |         MASTER-SAAO | (18h 36m 14.77s , +22d 03m 47.6s) |   C |    60 | 18.0 |        
  169883 | 2025-05-23 21:32:48 |         MASTER-SAAO | (18h 44m 03.01s , +22d 04m 19.5s) |   C |    60 | 17.9 |        
  169962 | 2025-05-23 21:34:07 |         MASTER-SAAO | (18h 52m 35.62s , +22d 02m 59.8s) |   C |    60 | 17.9 |        
  170041 | 2025-05-23 21:35:27 |         MASTER-SAAO | (18h 29m 41.45s , +20d 10m 24.7s) |   C |    60 | 18.4 |        
  170120 | 2025-05-23 21:36:46 |         MASTER-SAAO | (18h 38m 09.89s , +20d 11m 10.4s) |   C |    60 | 18.1 |        
  170200 | 2025-05-23 21:38:05 |         MASTER-SAAO | (18h 27m 37.11s , +22d 04m 11.2s) |   C |    60 | 18.3 |        
  170279 | 2025-05-23 21:39:25 |         MASTER-SAAO | (18h 36m 17.13s , +22d 05m 39.3s) |   C |    60 | 18.1 |        
  170524 | 2025-05-23 21:43:29 |         MASTER-SAAO | (18h 44m 04.99s , +22d 04m 22.9s) |   C |    60 | 18.0 |        
  170603 | 2025-05-23 21:44:49 |         MASTER-SAAO | (18h 52m 36.66s , +22d 03m 04.4s) |   C |    60 | 18.1 |        
  170683 | 2025-05-23 21:46:08 |         MASTER-SAAO | (18h 29m 40.72s , +20d 10m 23.7s) |   C |    60 | 18.4 |        
  170762 | 2025-05-23 21:47:28 |         MASTER-SAAO | (18h 38m 09.97s , +20d 11m 15.5s) |   C |    60 | 18.2 |        
  170842 | 2025-05-23 21:48:47 |         MASTER-SAAO | (18h 27m 37.28s , +22d 04m 21.8s) |   C |    60 | 18.3 |        
  170921 | 2025-05-23 21:50:07 |         MASTER-SAAO | (18h 36m 18.70s , +22d 05m 39.6s) |   C |    60 | 18.2 |        
  171165 | 2025-05-23 21:54:11 |         MASTER-SAAO | (18h 44m 04.02s , +22d 04m 24.6s) |   C |    60 | 18.1 |        
  171245 | 2025-05-23 21:55:30 |         MASTER-SAAO | (18h 52m 36.48s , +22d 03m 06.9s) |   C |    60 | 18.1 |        
  171956 | 2025-05-23 22:07:22 |   MASTER-Kislovodsk | (18h 47m 38.40s , +20d 28m 18.0s) |   C |    60 | 18.3 |        
  172039 | 2025-05-23 22:08:44 |   MASTER-Kislovodsk | (18h 56m 11.72s , +20d 29m 08.9s) |   C |    60 | 18.2 |        
  172627 | 2025-05-23 22:18:33 |   MASTER-Kislovodsk | (18h 47m 36.87s , +20d 29m 36.9s) |   C |    60 | 18.1 |        
  172712 | 2025-05-23 22:19:58 |   MASTER-Kislovodsk | (18h 56m 17.38s , +20d 28m 26.3s) |   C |    60 | 18.1 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12595
TYPE = 35
DAYS = 1


MASTER-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the FERMI GRB 250521D ( Fermi GBM team, GCN 40516) errorbox  69766 sec after notice time and 69806 sec after trigger time at 2025-05-22 17:45:22 UT, with upper limit up to  16.9 mag. The observations began at zenith distance = 38 deg. The sun  altitude  is -17.9 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the FERMI GRB 250521D errorbox  74439 sec after notice time and 74480 sec after trigger time at 2025-05-22 19:03:16 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 63 deg. The sun  altitude  is -20.4 deg. 

The galactic latitude b = 10 deg., longitude l = 52 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2877798

We obtain a following upper limits.  

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

   69810 | 2025-05-22 17:45:22 |        MASTER-Tunka | (18h 54m 35.08s , +23d 23m 49.9s) |   C |     6 | 16.9 |        
   74510 | 2025-05-22 19:03:16 |   MASTER-Kislovodsk | (18h 46m 09.15s , +22d 14m 31.3s) |   C |    60 | 17.9 |        
   74594 | 2025-05-22 19:04:40 |   MASTER-Kislovodsk | (18h 54m 44.61s , +22d 15m 50.5s) |   C |    60 | 17.4 |        
   74879 | 2025-05-22 19:09:25 |   MASTER-Kislovodsk | (18h 31m 37.29s , +20d 22m 21.4s) |   C |    60 | 18.2 |        
   74962 | 2025-05-22 19:10:48 |   MASTER-Kislovodsk | (18h 40m 08.81s , +20d 23m 00.2s) |   C |    60 | 17.8 |        
   75252 | 2025-05-22 19:15:37 |   MASTER-Kislovodsk | (18h 46m 02.01s , +22d 15m 17.9s) |   C |    60 | 16.9 |        
   75343 | 2025-05-22 19:17:08 |   MASTER-Kislovodsk | (18h 54m 46.14s , +22d 14m 48.8s) |   C |    60 | 17.8 |        
   75628 | 2025-05-22 19:21:54 |   MASTER-Kislovodsk | (18h 31m 39.68s , +20d 22m 13.8s) |   C |    60 | 18.1 |        
   75711 | 2025-05-22 19:23:16 |   MASTER-Kislovodsk | (18h 40m 14.15s , +20d 23m 35.2s) |   C |    60 | 17.8 |        
   76001 | 2025-05-22 19:28:07 |   MASTER-Kislovodsk | (18h 46m 02.06s , +22d 17m 32.5s) |   C |    60 | 17.7 |        
   76084 | 2025-05-22 19:29:29 |   MASTER-Kislovodsk | (18h 54m 45.46s , +22d 16m 10.7s) |   C |    60 | 17.7 |        
   76372 | 2025-05-22 19:34:17 |   MASTER-Kislovodsk | (18h 31m 43.25s , +20d 22m 53.4s) |   C |    60 | 18.1 |        
   76455 | 2025-05-22 19:35:41 |   MASTER-Kislovodsk | (18h 40m 11.56s , +20d 24m 08.0s) |   C |    60 | 17.8 |        
   76739 | 2025-05-22 19:40:24 |   MASTER-Kislovodsk | (18h 46m 07.36s , +22d 17m 42.9s) |   C |    60 | 17.8 |        
   76822 | 2025-05-22 19:41:47 |   MASTER-Kislovodsk | (18h 54m 40.60s , +22d 16m 47.2s) |   C |    60 | 17.8 |        
   76903 | 2025-05-22 19:43:08 |   MASTER-Kislovodsk | (18h 29m 41.52s , +22d 18m 03.0s) |   C |    60 | 17.9 |        
   76986 | 2025-05-22 19:44:31 |   MASTER-Kislovodsk | (18h 38m 14.77s , +22d 16m 41.7s) |   C |    60 | 17.8 |        
   77068 | 2025-05-22 19:45:54 |   MASTER-Kislovodsk | (18h 31m 40.38s , +20d 23m 17.2s) |   C |    60 | 17.9 |        
   77152 | 2025-05-22 19:47:17 |   MASTER-Kislovodsk | (18h 40m 10.81s , +20d 24m 27.4s) |   C |    60 | 17.9 |        
   77234 | 2025-05-22 19:48:39 |   MASTER-Kislovodsk | (18h 47m 52.94s , +20d 24m 02.5s) |   C |    60 | 17.7 |        
   77317 | 2025-05-22 19:50:03 |   MASTER-Kislovodsk | (18h 56m 20.02s , +20d 23m 08.0s) |   C |    60 | 17.5 |        
   77399 | 2025-05-22 19:51:25 |   MASTER-Kislovodsk | (18h 45m 59.84s , +22d 18m 39.9s) |   C |    60 | 17.3 |        
   77482 | 2025-05-22 19:52:48 |   MASTER-Kislovodsk | (18h 54m 44.96s , +22d 17m 19.2s) |   C |    60 | 17.7 |        
   77565 | 2025-05-22 19:54:10 |   MASTER-Kislovodsk | (18h 29m 34.62s , +22d 17m 33.1s) |   C |    60 | 17.7 |        
   77649 | 2025-05-22 19:55:35 |   MASTER-Kislovodsk | (18h 38m 19.02s , +22d 17m 33.2s) |   C |    60 | 17.8 |        
   77731 | 2025-05-22 19:56:57 |   MASTER-Kislovodsk | (18h 31m 37.42s , +20d 25m 11.9s) |   C |    60 | 18.0 |        
   77813 | 2025-05-22 19:58:19 |   MASTER-Kislovodsk | (18h 40m 10.02s , +20d 23m 31.4s) |   C |    60 | 17.6 |        
   77896 | 2025-05-22 19:59:41 |   MASTER-Kislovodsk | (18h 47m 51.21s , +20d 24m 47.4s) |   C |    60 | 17.9 |        
   77977 | 2025-05-22 20:01:02 |   MASTER-Kislovodsk | (18h 56m 17.56s , +20d 23m 39.8s) |   C |    60 | 17.8 |        
   78061 | 2025-05-22 20:02:27 |   MASTER-Kislovodsk | (18h 45m 59.81s , +22d 19m 12.4s) |   C |    60 | 17.8 |        
   78145 | 2025-05-22 20:03:50 |   MASTER-Kislovodsk | (18h 54m 42.17s , +22d 17m 52.4s) |   C |    60 | 17.8 |        
   78229 | 2025-05-22 20:05:14 |   MASTER-Kislovodsk | (18h 29m 32.68s , +22d 18m 03.6s) |   C |    60 | 18.0 |        
   78406 | 2025-05-22 20:08:12 |   MASTER-Kislovodsk | (18h 38m 14.34s , +22d 18m 42.2s) |   C |    60 | 17.8 |        
   78669 | 2025-05-22 20:12:34 |   MASTER-Kislovodsk | (18h 31m 38.03s , +20d 25m 46.9s) |   C |    60 | 18.0 |        
   78752 | 2025-05-22 20:13:58 |   MASTER-Kislovodsk | (18h 40m 05.15s , +20d 24m 24.8s) |   C |    60 | 17.8 |        
   78834 | 2025-05-22 20:15:20 |   MASTER-Kislovodsk | (18h 47m 51.60s , +20d 24m 27.8s) |   C |    60 | 17.9 |        
   78916 | 2025-05-22 20:16:42 |   MASTER-Kislovodsk | (18h 56m 19.85s , +20d 25m 26.9s) |   C |    60 | 17.7 |        
   79000 | 2025-05-22 20:18:06 |   MASTER-Kislovodsk | (18h 29m 37.27s , +22d 20m 41.3s) |   C |    60 | 17.8 |        
   79178 | 2025-05-22 20:21:04 |   MASTER-Kislovodsk | (18h 38m 11.62s , +22d 18m 45.4s) |   C |    60 | 17.9 |        
   79607 | 2025-05-22 20:28:12 |   MASTER-Kislovodsk | (18h 47m 48.78s , +20d 24m 52.5s) |   C |    60 | 17.9 |        
   79690 | 2025-05-22 20:29:36 |   MASTER-Kislovodsk | (18h 56m 19.10s , +20d 26m 25.2s) |   C |    60 | 17.9 |        
   79872 | 2025-05-22 20:32:37 |   MASTER-Kislovodsk | (18h 29m 31.64s , +22d 20m 40.2s) |   C |    60 | 17.9 |        
   79962 | 2025-05-22 20:34:08 |   MASTER-Kislovodsk | (18h 38m 09.84s , +22d 19m 17.9s) |   C |    60 | 17.8 |        
   80394 | 2025-05-22 20:41:19 |   MASTER-Kislovodsk | (18h 47m 49.36s , +20d 25m 48.9s) |   C |    60 | 17.5 |        
   80477 | 2025-05-22 20:42:42 |   MASTER-Kislovodsk | (18h 56m 17.51s , +20d 26m 53.5s) |   C |    60 | 17.8 |        
   80739 | 2025-05-22 20:47:05 |   MASTER-Kislovodsk | (18h 29m 30.95s , +22d 22m 18.1s) |   C |    60 | 17.9 |        
   80829 | 2025-05-22 20:48:35 |   MASTER-Kislovodsk | (18h 38m 16.47s , +22d 20m 24.5s) |   C |    60 | 17.9 |        
   81109 | 2025-05-22 20:53:14 |   MASTER-Kislovodsk | (18h 47m 46.76s , +20d 26m 20.8s) |   C |    60 | 18.0 |        
   81286 | 2025-05-22 20:56:11 |   MASTER-Kislovodsk | (18h 56m 15.11s , +20d 26m 36.8s) |   C |    60 | 17.9 |        
   81473 | 2025-05-22 20:59:18 |   MASTER-Kislovodsk | (18h 45m 25.79s , +24d 15m 57.0s) |   C |    60 | 18.0 |        
   81557 | 2025-05-22 21:00:43 |   MASTER-Kislovodsk | (18h 54m 06.25s , +24d 14m 44.2s) |   C |    60 | 17.9 |        
   81668 | 2025-05-22 21:02:33 |   MASTER-Kislovodsk | (18h 34m 45.97s , +18d 33m 38.2s) |   C |    60 | 18.0 |        
   81751 | 2025-05-22 21:03:56 |   MASTER-Kislovodsk | (18h 43m 05.28s , +18d 32m 22.4s) |   C |    60 | 18.1 |        
   81921 | 2025-05-22 21:06:47 |   MASTER-Kislovodsk | (18h 37m 32.39s , +24d 16m 12.0s) |   C |    60 | 18.1 |        
   82188 | 2025-05-22 21:11:13 |   MASTER-Kislovodsk | (18h 45m 18.82s , +24d 15m 19.0s) |   C |    60 | 18.1 |        
   82270 | 2025-05-22 21:12:35 |   MASTER-Kislovodsk | (18h 54m 05.37s , +24d 16m 01.0s) |   C |    60 | 17.9 |        
   82375 | 2025-05-22 21:14:21 |   MASTER-Kislovodsk | (18h 34m 43.84s , +18d 33m 54.3s) |   C |    60 | 18.0 |        
   82457 | 2025-05-22 21:15:43 |   MASTER-Kislovodsk | (18h 43m 05.33s , +18d 32m 37.5s) |   C |    60 | 18.1 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12593
TYPE = 35
DAYS = 0


MASTER-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the FERMI GRB 250521D ( Fermi GBM team, GCN 40516) errorbox  74439 sec after notice time and 74480 sec after trigger time at 2025-05-22 19:03:16 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 63 deg. The sun  altitude  is -20.4 deg. 

The galactic latitude b = 10 deg., longitude l = 52 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2877804

We obtain a following upper limits.  

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

   74510 | 2025-05-22 19:03:16 |   MASTER-Kislovodsk | (18h 46m 09.15s , +22d 14m 31.3s) |   C |    60 | 17.9 |        
   74594 | 2025-05-22 19:04:40 |   MASTER-Kislovodsk | (18h 54m 44.61s , +22d 15m 50.5s) |   C |    60 | 17.4 |        
   74879 | 2025-05-22 19:09:25 |   MASTER-Kislovodsk | (18h 31m 37.29s , +20d 22m 21.4s) |   C |    60 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12592
TYPE = 35
DAYS = 0


MASTER-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the FERMI GRB 250521D ( Fermi GBM team, GCN 40516) errorbox  74439 sec after notice time and 74480 sec after trigger time at 2025-05-22 19:03:16 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 63 deg. The sun  altitude  is -20.4 deg. 

The galactic latitude b = 10 deg., longitude l = 52 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2877804

We obtain a following upper limits.  

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

   74510 | 2025-05-22 19:03:16 |   MASTER-Kislovodsk | (18h 46m 09.15s , +22d 14m 31.3s) |   C |    60 | 17.9 |        
   74594 | 2025-05-22 19:04:40 |   MASTER-Kislovodsk | (18h 54m 44.61s , +22d 15m 50.5s) |   C |    60 | 17.4 |        
   74879 | 2025-05-22 19:09:25 |   MASTER-Kislovodsk | (18h 31m 37.29s , +20d 22m 21.4s) |   C |    60 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12591
TYPE = 34
DAYS = 0


MASTER-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the FERMI GRB 250521D ( Fermi GBM team, GCN 40516) errorbox  74439 sec after notice time and 74480 sec after trigger time at 2025-05-22 19:03:16 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 63 deg. The sun  altitude  is -20.4 deg. 

The galactic latitude b = 10 deg., longitude l = 52 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2877804

We obtain a following upper limits.  

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

   74510 | 2025-05-22 19:03:16 |   MASTER-Kislovodsk | (18h 46m 09.15s , +22d 14m 31.3s) |   C |    60 | 17.9 |        
   74594 | 2025-05-22 19:04:40 |   MASTER-Kislovodsk | (18h 54m 44.61s , +22d 15m 50.5s) |   C |    60 | 17.4 |        
   74879 | 2025-05-22 19:09:25 |   MASTER-Kislovodsk | (18h 31m 37.29s , +20d 22m 21.4s) |   C |    60 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025