[vsnet-grb-info 25518] Fermi GRB 200421A: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27618
SUBJECT: Fermi GRB 200421A: Global MASTER-Net observations report 
DATE:    20/04/21 23:30:16 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-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 200421A ( Fermi GBM team, GCN 27616) errorbox  48 sec after notice time and 75 sec after trigger time at 2020-04-21 20:47:15 UT, with upper limit up to  20.4 mag. The observations began at zenith distance = 30 deg. The sun  altitude  is -32.5 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 200421A errorbox  548 sec after notice time and 575 sec after trigger time at 2020-04-21 20:55:35 UT, with upper limit up to  19.5 mag. The observations began at zenith distance = 37 deg. The sun  altitude  is -18.3 deg. 

The galactic latitude b = 49 deg., longitude l = 142 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1342104

We obtain a following upper limits.  

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

      86 | 2020-04-21 20:47:15 |      MASTER-Tavrida | (10h 27m 01.45s , +63d 21m 13.8s) |   C |    20 | 18.5 |        
     111 | 2020-04-21 20:47:15 |      MASTER-Tavrida | (10h 27m 01.45s , +63d 21m 13.8s) |   C |    70 | 19.4 |  Coadd 
     126 | 2020-04-21 20:47:55 |      MASTER-Tavrida | (10h 27m 05.58s , +63d 22m 60.0s) |   C |    20 | 18.5 |        
     172 | 2020-04-21 20:48:36 |      MASTER-Tavrida | (10h 26m 57.61s , +63d 22m 04.3s) |   C |    30 | 18.9 |        
     227 | 2020-04-21 20:49:26 |      MASTER-Tavrida | (10h 26m 58.60s , +63d 23m 04.7s) |   C |    40 | 19.1 |        
     287 | 2020-04-21 20:49:26 |      MASTER-Tavrida | (10h 26m 58.61s , +63d 23m 04.8s) |   C |   160 | 20.1 |  Coadd 
     292 | 2020-04-21 20:50:27 |      MASTER-Tavrida | (10h 27m 03.30s , +63d 22m 04.8s) |   C |    50 | 19.3 |        
     372 | 2020-04-21 20:51:37 |      MASTER-Tavrida | (10h 26m 57.52s , +63d 21m 04.7s) |   C |    70 | 19.4 |        
     458 | 2020-04-21 20:53:07 |      MASTER-Tavrida | (10h 20m 09.48s , +64d 11m 08.1s) |   C |    60 | 19.4 |        
     538 | 2020-04-21 20:54:28 |      MASTER-Tavrida | (10h 29m 11.17s , +66d 11m 39.8s) |   C |    60 | 19.4 |        
     636 | 2020-04-21 20:55:35 |          MASTER-IAC | (10h 55m 15.49s , +63d 58m 18.2s) |  P| |   120 | 18.7 |        
     796 | 2020-04-21 20:55:35 |          MASTER-IAC | (10h 55m 15.49s , +63d 58m 18.2s) |  P| |   440 | 19.5 |  Coadd 
     636 | 2020-04-21 20:55:35 |          MASTER-IAC | (10h 53m 42.39s , +64d 02m 08.5s) |  P- |   120 | 18.6 |        
     796 | 2020-04-21 20:55:35 |          MASTER-IAC | (10h 53m 42.40s , +64d 02m 08.5s) |  P- |   440 | 19.3 |  Coadd 
     649 | 2020-04-21 20:55:48 |      MASTER-Tavrida | (11h 04m 51.95s , +64d 00m 51.3s) |   C |   120 | 19.9 |        
     809 | 2020-04-21 20:55:48 |      MASTER-Tavrida | (11h 04m 51.95s , +64d 00m 51.3s) |   C |   440 | 20.4 |  Coadd 
     799 | 2020-04-21 20:58:08 |      MASTER-Tavrida | (11h 04m 53.31s , +64d 01m 51.7s) |   C |   140 | 19.9 |        
     822 | 2020-04-21 20:58:31 |          MASTER-IAC | (10h 53m 34.48s , +64d 01m 32.8s) |  P- |   140 | 18.6 |        
     822 | 2020-04-21 20:58:31 |          MASTER-IAC | (10h 55m 07.45s , +63d 57m 41.8s) |  P| |   140 | 18.8 |        
     980 | 2020-04-21 21:00:49 |      MASTER-Tavrida | (11h 04m 58.03s , +64d 00m 51.9s) |   C |   180 | 19.9 |        
    1041 | 2020-04-21 21:01:51 |          MASTER-IAC | (10h 55m 08.43s , +63d 58m 41.6s) |  P| |   180 | 19.0 |        
    1180 | 2020-04-21 21:04:10 |      MASTER-Tavrida | (11h 04m 51.51s , +63d 59m 51.9s) |   C |   180 | 20.0 |        
    1249 | 2020-04-21 21:05:18 |          MASTER-IAC | (10h 55m 14.12s , +63d 57m 41.0s) |  P| |   180 | 19.0 |        
    1249 | 2020-04-21 21:05:18 |          MASTER-IAC | (10h 53m 40.98s , +64d 01m 31.9s) |  P- |   180 | 18.7 |        
    2125 | 2020-04-21 21:20:54 |      MASTER-Tavrida | (10h 20m 07.10s , +64d 10m 36.5s) |   C |    60 | 19.4 |        
    2206 | 2020-04-21 21:22:15 |      MASTER-Tavrida | (10h 38m 25.64s , +64d 11m 49.7s) |   C |    60 | 19.3 |        
    2286 | 2020-04-21 21:23:36 |      MASTER-Tavrida | (10h 29m 12.61s , +66d 10m 45.5s) |   C |    60 | 19.4 |        
    2367 | 2020-04-21 21:24:56 |      MASTER-Tavrida | (10h 48m 50.67s , +66d 09m 58.5s) |   C |    60 | 19.4 |        
    2447 | 2020-04-21 21:26:16 |      MASTER-Tavrida | (10h 56m 47.88s , +64d 11m 45.0s) |   C |    60 | 19.4 |        
    2930 | 2020-04-21 21:34:19 |      MASTER-Tavrida | (10h 38m 24.85s , +64d 10m 50.0s) |   C |    60 | 19.3 |        
    3010 | 2020-04-21 21:35:39 |      MASTER-Tavrida | (10h 48m 50.84s , +66d 11m 59.2s) |   C |    60 | 19.3 |        
    3090 | 2020-04-21 21:36:59 |      MASTER-Tavrida | (10h 56m 50.75s , +64d 10m 60.0s) |   C |    60 | 19.4 |        
    3121 | 2020-04-21 21:37:30 |          MASTER-IAC | (10h 37m 09.03s , +62d 09m 29.6s) |   C |    60 | 18.5 |        
    3121 | 2020-04-21 21:37:30 |          MASTER-IAC | (10h 54m 32.50s , +62d 04m 53.2s) |   C |    60 | 18.6 |        
    3171 | 2020-04-21 21:38:20 |      MASTER-Tavrida | (11h 15m 03.11s , +64d 10m 07.5s) |   C |    60 | 19.2 |        
    3246 | 2020-04-21 21:39:35 |          MASTER-IAC | (10h 57m 10.05s , +66d 09m 45.2s) |   C |    60 | 18.6 |        
    3246 | 2020-04-21 21:39:35 |          MASTER-IAC | (11h 17m 14.87s , +66d 05m 01.4s) |   C |    60 | 18.6 |        
    3251 | 2020-04-21 21:39:40 |      MASTER-Tavrida | (11h 21m 28.36s , +62d 11m 55.1s) |   C |    60 | 19.0 |        
    3331 | 2020-04-21 21:41:01 |      MASTER-Tavrida | (11h 33m 28.87s , +64d 12m 03.1s) |   C |    60 | 19.2 |        
    3366 | 2020-04-21 21:41:35 |          MASTER-IAC | (11h 02m 17.17s , +60d 11m 59.9s) |   C |    60 | 18.3 |        
    3412 | 2020-04-21 21:42:21 |      MASTER-Tavrida | (10h 39m 35.72s , +60d 11m 41.9s) |   C |    60 | 18.8 |        
    3490 | 2020-04-21 21:43:39 |          MASTER-IAC | (10h 37m 11.63s , +62d 09m 50.5s) |   C |    60 | 18.6 |        
    3490 | 2020-04-21 21:43:39 |          MASTER-IAC | (10h 54m 35.39s , +62d 05m 11.9s) |   C |    60 | 18.8 |        
    3492 | 2020-04-21 21:43:41 |      MASTER-Tavrida | (11h 15m 10.34s , +64d 11m 06.1s) |   C |    60 | 19.2 |        
    3572 | 2020-04-21 21:45:02 |      MASTER-Tavrida | (11h 21m 24.55s , +62d 10m 05.1s) |   C |    60 | 19.1 |        
    3611 | 2020-04-21 21:45:40 |          MASTER-IAC | (11h 17m 14.08s , +66d 06m 38.0s) |   C |    60 | 18.5 |        
    3611 | 2020-04-21 21:45:40 |          MASTER-IAC | (10h 57m 07.85s , +66d 11m 22.5s) |   C |    60 | 18.5 |        
    3733 | 2020-04-21 21:47:42 |      MASTER-Tavrida | (11h 33m 26.04s , +64d 11m 52.1s) |   C |    60 | 19.3 |        
    3893 | 2020-04-21 21:50:23 |      MASTER-Tavrida | (10h 39m 41.31s , +60d 11m 11.5s) |   C |    60 | 19.1 |        
    3974 | 2020-04-21 21:51:43 |      MASTER-Tavrida | (10h 55m 38.78s , +60d 10m 49.8s) |   C |    60 | 19.2 |        
    4296 | 2020-04-21 21:57:05 |      MASTER-Tavrida | (10h 55m 41.75s , +60d 11m 32.5s) |   C |    60 | 19.2 |        
    4617 | 2020-04-21 22:02:26 |      MASTER-Tavrida | (10h 30m 05.72s , +62d 09m 26.1s) |   C |    60 | 19.1 |        
    5019 | 2020-04-21 22:09:08 |      MASTER-Tavrida | (10h 30m 05.66s , +62d 10m 23.8s) |   C |    60 | 19.1 |        
    7164 | 2020-04-21 22:44:53 |      MASTER-Tavrida | (10h 47m 09.38s , +62d 11m 33.3s) |   C |    60 | 18.9 |        
    7341 | 2020-04-21 22:47:50 |      MASTER-Tavrida | (11h 08m 38.99s , +66d 10m 25.9s) |   C |    60 | 19.0 |        
    7422 | 2020-04-21 22:49:11 |      MASTER-Tavrida | (11h 11m 43.05s , +60d 10m 03.3s) |   C |    60 | 18.9 |        
    7502 | 2020-04-21 22:50:31 |      MASTER-Tavrida | (10h 47m 16.18s , +62d 10m 58.4s) |   C |    60 | 19.1 |        
    7583 | 2020-04-21 22:51:52 |      MASTER-Tavrida | (11h 04m 16.48s , +62d 10m 38.2s) |   C |    60 | 19.1 |        
    7663 | 2020-04-21 22:53:12 |      MASTER-Tavrida | (11h 08m 33.22s , +66d 11m 44.3s) |   C |    60 | 19.1 |        
    7744 | 2020-04-21 22:54:33 |      MASTER-Tavrida | (11h 28m 25.22s , +66d 11m 00.6s) |   C |    60 | 19.0 |        
    7824 | 2020-04-21 22:55:54 |      MASTER-Tavrida | (11h 11m 39.42s , +60d 09m 39.3s) |   C |    60 | 19.0 |        
    7985 | 2020-04-21 22:58:34 |      MASTER-Tavrida | (11h 04m 19.01s , +62d 11m 03.3s) |   C |    60 | 19.0 |        
    8066 | 2020-04-21 22:59:55 |      MASTER-Tavrida | (11h 28m 21.20s , +66d 10m 09.3s) |   C |    60 | 19.1 |        
Filter C is a clear (unfiltred) band. 


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