[vsnet-grb-info 25508] Fermi GRB 200420A: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27608
SUBJECT: Fermi GRB 200420A: Global MASTER-Net observations report 
DATE:    20/04/20 03:15:07 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at 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 200420A ( Fermi GBM team, GCN 27607) errorbox  46 sec after notice time and 74 sec after trigger time at 2020-04-20 02:34:13 UT, with upper limit up to  17.5 mag. The observations began at zenith distance = 67 deg. The sun  altitude  is -44.6 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 200420A errorbox  49 sec after notice time and 77 sec after trigger time at 2020-04-20 02:34:16 UT, with upper limit up to  18.1 mag. The observations began at zenith distance = 43 deg. The sun  altitude  is -32.2 deg. 

The galactic latitude b = -12 deg., longitude l = 40 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1340649

We obtain a following upper limits.  

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

      80 | 2020-04-20 02:34:13 |          MASTER-IAC | (19h 42m 48.61s , +00d 48m 51.8s) |  P- |    10 | 15.7 |        
     110 | 2020-04-20 02:34:13 |          MASTER-IAC | (19h 42m 48.61s , +00d 48m 51.7s) |  P- |    70 | 17.0 |  Coadd 
      80 | 2020-04-20 02:34:13 |          MASTER-IAC | (19h 43m 29.91s , +00d 45m 12.3s) |  P| |    10 | 15.2 |        
     120 | 2020-04-20 02:34:13 |          MASTER-IAC | (19h 43m 29.90s , +00d 45m 12.3s) |  P| |    90 | 16.7 |  Coadd 
      88 | 2020-04-20 02:34:16 |         MASTER-SAAO | (19h 46m 31.66s , +00d 48m 44.4s) |   C |    20 | 17.4 |        
      93 | 2020-04-20 02:34:21 |         MASTER-SAAO | (19h 39m 30.51s , +00d 47m 31.7s) |   C |    20 | 17.8 |        
     127 | 2020-04-20 02:34:55 |         MASTER-SAAO | (19h 46m 33.59s , +00d 49m 44.6s) |   C |    20 | 17.4 |        
     133 | 2020-04-20 02:35:01 |         MASTER-SAAO | (19h 39m 32.42s , +00d 48m 31.9s) |   C |    20 | 17.6 |        
     150 | 2020-04-20 02:35:18 |          MASTER-IAC | (19h 43m 37.22s , +00d 45m 15.2s) |  P| |    20 | 15.8 |        
     150 | 2020-04-20 02:35:18 |          MASTER-IAC | (19h 42m 56.01s , +00d 48m 54.9s) |  P- |    20 | 16.3 |        
     181 | 2020-04-20 02:35:44 |         MASTER-SAAO | (19h 46m 39.17s , +00d 48m 44.4s) |   C |    30 | 17.6 |        
     186 | 2020-04-20 02:35:49 |         MASTER-SAAO | (19h 39m 37.98s , +00d 47m 31.8s) |   C |    30 | 17.8 |        
     238 | 2020-04-20 02:36:37 |          MASTER-IAC | (19h 42m 52.91s , +00d 50m 24.8s) |  P- |    40 | 16.7 |        
     268 | 2020-04-20 02:37:01 |         MASTER-SAAO | (19h 46m 32.95s , +00d 47m 42.0s) |   C |    50 | 17.6 |        
     273 | 2020-04-20 02:37:06 |         MASTER-SAAO | (19h 39m 31.73s , +00d 46m 29.2s) |   C |    50 | 17.9 |        
     342 | 2020-04-20 02:38:10 |         MASTER-SAAO | (19h 46m 40.30s , +00d 47m 44.0s) |   C |    60 | 17.8 |        
     347 | 2020-04-20 02:38:16 |         MASTER-SAAO | (19h 39m 39.07s , +00d 46m 31.2s) |   C |    60 | 18.0 |        
     350 | 2020-04-20 02:38:19 |          MASTER-IAC | (19h 43m 34.18s , +00d 45m 39.9s) |  P| |    60 | 16.7 |        
     350 | 2020-04-20 02:38:19 |          MASTER-IAC | (19h 42m 53.02s , +00d 49m 19.9s) |  P- |    60 | 17.0 |        
     444 | 2020-04-20 02:39:52 |         MASTER-SAAO | (19h 46m 08.52s , +00d 01m 02.6s) |   C |    60 | 17.8 |        
     450 | 2020-04-20 02:39:58 |         MASTER-SAAO | (19h 39m 07.28s , -00d 00m 10.0s) |   C |    60 | 18.0 |        
     469 | 2020-04-20 02:40:18 |          MASTER-IAC | (19h 47m 28.32s , +01d 58m 26.6s) |   C |    60 | 17.2 |        
     469 | 2020-04-20 02:40:18 |          MASTER-IAC | (19h 39m 25.03s , +02d 02m 56.4s) |   C |    60 | 17.4 |        
     539 | 2020-04-20 02:41:27 |         MASTER-SAAO | (19h 46m 51.96s , -02d 00m 27.7s) |   C |    60 | 17.5 |        
     544 | 2020-04-20 02:41:32 |         MASTER-SAAO | (19h 39m 50.40s , -02d 01m 40.2s) |   C |    60 | 17.6 |        
     587 | 2020-04-20 02:42:16 |          MASTER-IAC | (19h 49m 33.53s , +03d 57m 42.2s) |   C |    60 | 17.3 |        
     587 | 2020-04-20 02:42:16 |          MASTER-IAC | (19h 41m 29.36s , +04d 02m 12.3s) |   C |    60 | 17.4 |        
     641 | 2020-04-20 02:43:09 |         MASTER-SAAO | (20h 02m 10.02s , +00d 01m 19.3s) |   C |    60 | 17.9 |        
     647 | 2020-04-20 02:43:15 |         MASTER-SAAO | (19h 55m 08.85s , +00d 00m 06.4s) |   C |    60 | 18.1 |        
     706 | 2020-04-20 02:44:14 |          MASTER-IAC | (19h 55m 19.28s , +02d 02m 49.7s) |   C |    60 | 17.5 |        
     706 | 2020-04-20 02:44:14 |          MASTER-IAC | (20h 03m 22.51s , +01d 58m 18.6s) |   C |    60 | 17.0 |        
Filter C is a clear (unfiltred) band. 


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