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GCN Circular 27801

Subject
Fermi GRB 200524A: Global MASTER-Net observations report
Date
2020-05-24T20:45:10Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, 
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
D.Kuvshinov,  D. Cheryasov
(Lomonosov Moscow State University, SAI, Physics Department),

R. Podesta, C.Lopez, F. Podesta, C.Francile 
(Observatorio Astronomico Felix Aguilar OAFA),

H.Levato 
(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),

R. Rebolo, M. Serra 
(The Instituto de Astrofisica de Canarias),

D. Buckley 
(South African Astronomical Observatory),

O.A. Gres, N.M. Budnev, O.Ershova 
(Irkutsk State University, API),

A. Tlatov, D. Dormidontov 
(Kislovodsk Solar Station of the Pulkovo Observatory),

V. Yurkov, A. Gabovich, Yu. Sergienko 
(Blagoveschensk Educational State University)




MASTER-IAC robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 200524A ( F. Fana Dirirsa et al., GCN 27797) errorbox  74 sec after notice time and 111 sec after trigger time at 2020-05-24 05:05:51 UT, with upper limit up to  17.9 mag. Observations started at twilight.  The observations began at zenith distance = 67 deg. The sun  altitude  is -13.1 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 200524A errorbox  47446 sec after notice time and 47483 sec after trigger time at 2020-05-24 18:15:23 UT, with upper limit up to  18.9 mag. Observations started at twilight.  The observations began at zenith distance = 22 deg. The sun  altitude  is -10.0 deg. 

The galactic latitude b = 53 deg., longitude l = 110 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1364553

We obtain a following upper limits.  

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

     121 | 2020-05-24 05:05:51 |          MASTER-IAC | (13h 54m 44.48s , +64d 23m 18.5s) |  P| |    20 | 16.4 |        
     121 | 2020-05-24 05:05:51 |          MASTER-IAC | (13h 52m 51.72s , +64d 28m 46.4s) |  P- |    20 | 16.2 |        
     202 | 2020-05-24 05:07:06 |          MASTER-IAC | (14h 05m 35.11s , +64d 25m 10.2s) |  P| |    30 | 16.5 |        
     262 | 2020-05-24 05:07:06 |          MASTER-IAC | (14h 05m 35.11s , +64d 25m 10.3s) |  P| |   150 | 17.4 |  Coadd 
     447 | 2020-05-24 05:07:06 |          MASTER-IAC | (14h 05m 35.11s , +64d 25m 10.2s) |  P| |   520 | 17.5 |  Coadd 
     202 | 2020-05-24 05:07:06 |          MASTER-IAC | (14h 03m 42.26s , +64d 30m 39.9s) |  P- |    30 | 16.6 |        
     262 | 2020-05-24 05:07:06 |          MASTER-IAC | (14h 03m 42.26s , +64d 30m 39.9s) |  P- |   150 | 17.7 |  Coadd 
     447 | 2020-05-24 05:07:06 |          MASTER-IAC | (14h 03m 42.26s , +64d 30m 39.9s) |  P- |   520 | 17.9 |  Coadd 
     298 | 2020-05-24 05:08:33 |          MASTER-IAC | (14h 05m 41.22s , +64d 25m 34.8s) |  P| |    50 | 16.8 |        
     298 | 2020-05-24 05:08:33 |          MASTER-IAC | (14h 03m 48.47s , +64d 31m 05.3s) |  P- |    50 | 17.0 |        
     417 | 2020-05-24 05:10:22 |          MASTER-IAC | (14h 05m 37.30s , +64d 26m 44.3s) |  P| |    70 | 16.7 |        
     417 | 2020-05-24 05:10:22 |          MASTER-IAC | (14h 03m 44.58s , +64d 32m 15.1s) |  P- |    70 | 17.0 |        
     555 | 2020-05-24 05:12:30 |          MASTER-IAC | (14h 05m 37.10s , +64d 25m 14.7s) |  P| |    90 | 16.7 |        
     695 | 2020-05-24 05:12:30 |          MASTER-IAC | (14h 05m 37.10s , +64d 25m 14.7s) |  P| |   370 | 17.2 |  Coadd 
     555 | 2020-05-24 05:12:30 |          MASTER-IAC | (14h 03m 44.50s , +64d 30m 45.6s) |  P- |    90 | 17.0 |        
     695 | 2020-05-24 05:12:30 |          MASTER-IAC | (14h 03m 44.49s , +64d 30m 45.6s) |  P- |   370 | 17.7 |  Coadd 
     720 | 2020-05-24 05:15:00 |          MASTER-IAC | (14h 05m 40.33s , +64d 26m 43.7s) |  P| |   120 | 16.6 |        
     720 | 2020-05-24 05:15:00 |          MASTER-IAC | (14h 03m 47.66s , +64d 32m 14.6s) |  P- |   120 | 17.0 |        
     922 | 2020-05-24 05:18:02 |          MASTER-IAC | (14h 05m 33.40s , +64d 26m 06.3s) |  P| |   160 | 16.4 |        
     922 | 2020-05-24 05:18:02 |          MASTER-IAC | (14h 03m 40.77s , +64d 31m 37.6s) |  P- |   160 | 16.6 |        
    1151 | 2020-05-24 05:21:41 |          MASTER-IAC | (14h 05m 33.93s , +64d 27m 05.4s) |  P| |   180 | 15.8 |        
    1151 | 2020-05-24 05:21:41 |          MASTER-IAC | (14h 03m 41.21s , +64d 32m 36.9s) |  P- |   180 | 16.4 |        
    1331 | 2020-05-24 05:21:41 |          MASTER-IAC | (14h 03m 41.17s , +64d 32m 36.9s) |  P- |   540 | 16.5 |  Coadd 
    1391 | 2020-05-24 05:25:41 |          MASTER-IAC | (14h 05m 40.44s , +64d 26m 04.0s) |  P| |   180 | 15.3 |        
    1391 | 2020-05-24 05:25:41 |          MASTER-IAC | (14h 03m 47.80s , +64d 31m 35.5s) |  P- |   180 | 15.8 |        
    1629 | 2020-05-24 05:29:39 |          MASTER-IAC | (14h 03m 42.61s , +64d 30m 34.8s) |  P- |   180 | 15.5 |        
   47513 | 2020-05-24 18:15:23 |      MASTER-Tavrida | (14h 04m 04.92s , +62d 01m 07.4s) |   C |    60 | 17.4 |        
   47594 | 2020-05-24 18:16:44 |      MASTER-Tavrida | (13h 50m 59.78s , +64d 00m 37.7s) |   C |    60 | 17.6 |        
   47675 | 2020-05-24 18:18:05 |      MASTER-Tavrida | (13h 29m 49.44s , +62d 00m 37.3s) |   C |    60 | 17.6 |        
   47756 | 2020-05-24 18:19:25 |      MASTER-Tavrida | (13h 44m 19.15s , +60d 01m 24.6s) |   C |    60 | 17.8 |        
   47836 | 2020-05-24 18:20:46 |      MASTER-Tavrida | (14h 03m 58.14s , +62d 02m 08.5s) |   C |    60 | 17.8 |        
   48129 | 2020-05-24 18:25:38 |      MASTER-Tavrida | (14h 18m 44.20s , +62d 08m 50.8s) |   C |    60 | 18.1 |        
   48209 | 2020-05-24 18:26:59 |      MASTER-Tavrida | (13h 48m 27.80s , +64d 10m 01.2s) |   C |    60 | 18.3 |        
   48290 | 2020-05-24 18:28:19 |      MASTER-Tavrida | (14h 06m 45.51s , +64d 11m 10.3s) |   C |    60 | 18.2 |        
   48451 | 2020-05-24 18:31:01 |      MASTER-Tavrida | (13h 44m 38.52s , +62d 11m 16.6s) |   C |    60 | 18.4 |        
   48531 | 2020-05-24 18:32:21 |      MASTER-Tavrida | (13h 42m 06.69s , +60d 10m 42.5s) |   C |    60 | 18.5 |        
   48612 | 2020-05-24 18:33:41 |      MASTER-Tavrida | (13h 58m 09.72s , +60d 11m 28.6s) |   C |    60 | 18.8 |        
   48693 | 2020-05-24 18:35:03 |      MASTER-Tavrida | (14h 18m 50.75s , +62d 10m 04.4s) |   C |    60 | 18.6 |        
   48773 | 2020-05-24 18:36:23 |      MASTER-Tavrida | (14h 06m 42.74s , +64d 09m 24.8s) |   C |    60 | 18.7 |        
   48854 | 2020-05-24 18:37:44 |      MASTER-Tavrida | (13h 44m 37.74s , +62d 10m 11.8s) |   C |    60 | 18.9 |        
   48935 | 2020-05-24 18:39:04 |      MASTER-Tavrida | (13h 58m 12.40s , +60d 11m 28.7s) |   C |    60 | 18.8 |        
Filter C is a clear (unfiltred) band. 


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