[vsnet-grb-info 25533] Fermi GRB 200423A: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27633
SUBJECT: Fermi GRB 200423A: Global MASTER-Net observations report 
DATE:    20/04/23 19:15:16 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 200423A ( Fermi GBM team, GCN 27632) errorbox  14126 sec after notice time and 14153 sec after trigger time at 2020-04-23 17:50:04 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 77 deg. The sun  altitude  is -12.8 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 200423A errorbox  14486 sec after notice time and 14513 sec after trigger time at 2020-04-23 17:56:04 UT, with upper limit up to  18.8 mag. The observations began at zenith distance = 73 deg. The sun  altitude  is -18.9 deg. 

The galactic latitude b = 11 deg., longitude l = 106 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1343227

We obtain a following upper limits.  

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

   14183 | 2020-04-23 17:50:04 |      MASTER-Tavrida | (21h 00m 33.51s , +57d 54m 08.0s) |   C |    60 | 16.5 |        
   14279 | 2020-04-23 17:51:40 |      MASTER-Tavrida | (20h 39m 31.20s , +59d 48m 34.3s) |   C |    60 | 17.7 |        
   14375 | 2020-04-23 17:53:16 |      MASTER-Tavrida | (21h 12m 15.78s , +59d 53m 28.8s) |   C |    60 | 17.1 |        
   14471 | 2020-04-23 17:54:51 |      MASTER-Tavrida | (20h 51m 13.97s , +55d 48m 23.9s) |   C |    60 | 16.8 |        
   14543 | 2020-04-23 17:56:04 |   MASTER-Kislovodsk | (21h 08m 47.02s , +61d 29m 40.4s) |   C |    60 | 18.7 |        
   14543 | 2020-04-23 17:56:04 |   MASTER-Kislovodsk | (20h 51m 50.82s , +61d 57m 51.7s) |   C |    60 | 18.4 |        
   14566 | 2020-04-23 17:56:27 |      MASTER-Tavrida | (21h 00m 43.09s , +57d 55m 11.7s) |   C |    60 | 16.0 |        
   14624 | 2020-04-23 17:57:25 |   MASTER-Kislovodsk | (20h 44m 47.52s , +57d 31m 09.8s) |   C |    60 | 18.6 |        
   14624 | 2020-04-23 17:57:25 |   MASTER-Kislovodsk | (20h 29m 47.74s , +57d 59m 33.6s) |   C |    60 | 18.4 |        
   14660 | 2020-04-23 17:58:00 |      MASTER-Tavrida | (21h 15m 03.18s , +57d 45m 51.8s) |   C |    60 | 16.4 |        
   14704 | 2020-04-23 17:58:45 |   MASTER-Kislovodsk | (20h 34m 54.08s , +61d 30m 08.9s) |   C |    60 | 18.7 |        
   14704 | 2020-04-23 17:58:45 |   MASTER-Kislovodsk | (20h 17m 57.28s , +61d 58m 36.6s) |   C |    60 | 18.4 |        
   14754 | 2020-04-23 17:59:35 |      MASTER-Tavrida | (20h 40m 24.67s , +59d 52m 12.7s) |   C |    60 | 17.4 |        
   14847 | 2020-04-23 18:01:08 |      MASTER-Tavrida | (20h 55m 27.31s , +59d 48m 12.3s) |   C |    60 | 18.1 |        
   14865 | 2020-04-23 18:01:26 |   MASTER-Kislovodsk | (21h 08m 53.60s , +61d 29m 01.2s) |   C |    60 | 18.8 |        
   14865 | 2020-04-23 18:01:26 |   MASTER-Kislovodsk | (20h 51m 57.73s , +61d 57m 15.2s) |   C |    60 | 18.5 |        
   14943 | 2020-04-23 18:02:44 |      MASTER-Tavrida | (21h 12m 15.51s , +59d 51m 56.1s) |   C |    60 | 17.4 |        
   14946 | 2020-04-23 18:02:46 |   MASTER-Kislovodsk | (20h 44m 51.25s , +57d 30m 44.6s) |   C |    60 | 18.6 |        
   14946 | 2020-04-23 18:02:46 |   MASTER-Kislovodsk | (20h 29m 51.48s , +57d 59m 09.5s) |   C |    60 | 18.4 |        
   15026 | 2020-04-23 18:04:07 |   MASTER-Kislovodsk | (20h 34m 51.73s , +61d 29m 34.6s) |   C |    60 | 18.7 |        
   15026 | 2020-04-23 18:04:07 |   MASTER-Kislovodsk | (20h 17m 55.17s , +61d 58m 03.1s) |   C |    60 | 18.5 |        
   15038 | 2020-04-23 18:04:18 |      MASTER-Tavrida | (21h 27m 26.20s , +59d 47m 24.2s) |   C |    60 | 17.3 |        
   15131 | 2020-04-23 18:05:52 |      MASTER-Tavrida | (20h 51m 44.20s , +55d 56m 42.9s) |   C |    60 | 16.2 |        
   15225 | 2020-04-23 18:07:26 |      MASTER-Tavrida | (21h 05m 30.10s , +55d 48m 02.3s) |   C |    60 | 17.0 |        
   15268 | 2020-04-23 18:08:09 |   MASTER-Kislovodsk | (21h 33m 57.09s , +55d 30m 40.5s) |   C |    60 | 18.0 |        
   15268 | 2020-04-23 18:08:09 |   MASTER-Kislovodsk | (21h 19m 46.46s , +55d 58m 53.5s) |   C |    60 | 17.8 |        
   15320 | 2020-04-23 18:09:01 |      MASTER-Tavrida | (21h 15m 47.49s , +57d 54m 58.1s) |   C |    60 | 15.9 |        
   15348 | 2020-04-23 18:09:29 |   MASTER-Kislovodsk | (20h 49m 33.47s , +63d 29m 56.2s) |   C |    60 | 18.7 |        
   15349 | 2020-04-23 18:09:29 |   MASTER-Kislovodsk | (20h 31m 24.69s , +63d 58m 23.1s) |   C |    60 | 18.7 |        
   15416 | 2020-04-23 18:10:37 |      MASTER-Tavrida | (20h 55m 24.65s , +59d 46m 16.7s) |   C |    60 | 18.2 |        
   15432 | 2020-04-23 18:10:53 |   MASTER-Kislovodsk | (21h 45m 03.93s , +57d 28m 33.3s) |   C |    60 | 17.1 |        
   15432 | 2020-04-23 18:10:53 |   MASTER-Kislovodsk | (21h 30m 06.44s , +57d 56m 37.2s) |   C |    60 | 16.9 |        
   15511 | 2020-04-23 18:12:12 |      MASTER-Tavrida | (21h 28m 16.02s , +59d 51m 39.5s) |   C |    60 | 17.5 |        
   15593 | 2020-04-23 18:13:34 |   MASTER-Kislovodsk | (21h 34m 00.76s , +55d 30m 36.1s) |   C |    60 | 18.0 |        
   15593 | 2020-04-23 18:13:34 |   MASTER-Kislovodsk | (21h 19m 50.10s , +55d 58m 50.7s) |   C |    60 | 17.9 |        
   15608 | 2020-04-23 18:13:49 |      MASTER-Tavrida | (21h 05m 33.37s , +55d 47m 46.8s) |   C |    60 | 17.1 |        
   15674 | 2020-04-23 18:14:54 |   MASTER-Kislovodsk | (20h 49m 31.49s , +63d 29m 15.1s) |   C |    60 | 18.8 |        
   15674 | 2020-04-23 18:14:54 |   MASTER-Kislovodsk | (20h 31m 23.11s , +63d 57m 42.5s) |   C |    60 | 18.6 |        
   15703 | 2020-04-23 18:15:24 |      MASTER-Tavrida | (21h 09m 09.89s , +63d 47m 22.9s) |   C |    60 | 18.2 |        
   15769 | 2020-04-23 18:16:29 |   MASTER-Kislovodsk | (21h 45m 12.04s , +57d 30m 08.3s) |   C |    60 | 18.1 |        
   15769 | 2020-04-23 18:16:29 |   MASTER-Kislovodsk | (21h 30m 13.62s , +57d 58m 13.2s) |   C |    60 | 18.0 |        
   15797 | 2020-04-23 18:16:57 |      MASTER-Tavrida | (21h 25m 51.75s , +61d 47m 37.1s) |   C |    60 | 17.8 |        
   15888 | 2020-04-23 18:18:29 |      MASTER-Tavrida | (20h 08m 25.02s , +59d 52m 16.1s) |   C |    60 | 18.3 |        
   16076 | 2020-04-23 18:21:37 |      MASTER-Tavrida | (21h 09m 06.49s , +63d 46m 26.7s) |   C |    60 | 18.3 |        
   16169 | 2020-04-23 18:23:10 |      MASTER-Tavrida | (21h 25m 57.06s , +63d 47m 26.0s) |   C |    60 | 18.2 |        
   16243 | 2020-04-23 18:24:24 |   MASTER-Kislovodsk | (21h 08m 02.49s , +65d 29m 21.2s) |   C |    60 | 18.3 |        
   16243 | 2020-04-23 18:24:24 |   MASTER-Kislovodsk | (20h 48m 22.91s , +65d 57m 24.7s) |   C |    60 | 17.9 |        
   16264 | 2020-04-23 18:24:45 |      MASTER-Tavrida | (21h 26m 58.40s , +61d 49m 39.4s) |   C |    60 | 17.7 |        
   16358 | 2020-04-23 18:26:19 |      MASTER-Tavrida | (21h 42m 50.38s , +61d 47m 18.6s) |   C |    60 | 17.7 |        
   16452 | 2020-04-23 18:27:53 |      MASTER-Tavrida | (20h 08m 31.66s , +59d 53m 07.6s) |   C |    60 | 18.4 |        
   16533 | 2020-04-23 18:29:14 |      MASTER-Tavrida | (20h 24m 24.58s , +59d 51m 52.2s) |   C |    60 | 18.4 |        
   16721 | 2020-04-23 18:32:21 |      MASTER-Tavrida | (21h 25m 57.65s , +53d 58m 06.1s) |   C |    60 | 13.3 |        
   16815 | 2020-04-23 18:33:55 |      MASTER-Tavrida | (21h 25m 54.35s , +63d 46m 03.5s) |   C |    60 | 18.1 |        
   16910 | 2020-04-23 18:35:31 |      MASTER-Tavrida | (21h 44m 03.20s , +61d 50m 05.5s) |   C |    60 | 17.5 |        
   16991 | 2020-04-23 18:36:52 |      MASTER-Tavrida | (20h 24m 23.55s , +59d 52m 49.3s) |   C |    60 | 18.4 |        
   17085 | 2020-04-23 18:38:26 |      MASTER-Tavrida | (21h 25m 32.42s , +53d 47m 42.3s) |   C |    60 | 16.1 |        
   17350 | 2020-04-23 18:42:51 |      MASTER-Tavrida | (21h 43m 20.72s , +59d 46m 57.6s) |   C |    60 | 17.7 |        
   17445 | 2020-04-23 18:44:26 |      MASTER-Tavrida | (21h 45m 28.36s , +63d 47m 01.1s) |   C |    60 | 17.9 |        
Filter C is a clear (unfiltred) band. 


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