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GCN Circular 27491

Subject
Fermi GRB 200403B: Global MASTER-Net observations report
Date
2020-04-04T08:00:12Z (4 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-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 200403B ( Fermi GBM team, GCN 27484) errorbox  6502 sec after notice time and 6530 sec after trigger time at 2020-04-03 23:52:54 UT, with upper limit up to  19.7 mag. The observations began at zenith distance = 33 deg. The sun  altitude  is -32.7 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 200403B errorbox  9291 sec after notice time and 9319 sec after trigger time at 2020-04-04 00:39:23 UT, with upper limit up to  19.6 mag. The observations began at zenith distance = 27 deg. The sun  altitude  is -22.8 deg. 

The galactic latitude b = 34 deg., longitude l = 107 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1329159

We obtain a following upper limits.  

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

    6561 | 2020-04-03 23:52:54 |      MASTER-Tavrida | (17h 19m 29.12s , +72d 29m 19.2s) |   C |    60 | 19.0 |        
    6642 | 2020-04-03 23:54:15 |      MASTER-Tavrida | (16h 27m 37.28s , +72d 30m 45.6s) |   C |    60 | 19.0 |        
    8258 | 2020-04-04 00:21:11 |      MASTER-Tavrida | (17h 19m 26.57s , +72d 27m 30.6s) |   C |    60 | 19.2 |        
    8338 | 2020-04-04 00:22:31 |      MASTER-Tavrida | (17h 45m 28.63s , +72d 27m 18.3s) |   C |    60 | 19.0 |        
    8419 | 2020-04-04 00:23:52 |      MASTER-Tavrida | (16h 27m 34.56s , +72d 30m 31.0s) |   C |    60 | 18.8 |        
    9350 | 2020-04-04 00:39:23 |   MASTER-Kislovodsk | (16h 57m 40.90s , +69d 44m 20.8s) |   C |    60 | 19.6 |        
    9510 | 2020-04-04 00:42:03 |   MASTER-Kislovodsk | (17h 54m 44.01s , +71d 44m 38.4s) |   C |    60 | 19.1 |        
    9671 | 2020-04-04 00:44:44 |   MASTER-Kislovodsk | (16h 57m 38.95s , +69d 45m 06.5s) |   C |    60 | 19.5 |        
    9804 | 2020-04-04 00:46:56 |      MASTER-Tavrida | (16h 53m 18.54s , +72d 30m 00.4s) |   C |    60 | 18.6 |        
    9832 | 2020-04-04 00:47:25 |   MASTER-Kislovodsk | (17h 54m 52.89s , +71d 44m 37.3s) |   C |    60 | 19.1 |        
    9978 | 2020-04-04 00:49:51 |      MASTER-Tavrida | (17h 42m 09.04s , +71d 31m 53.0s) |   C |    60 | 19.1 |        
   10073 | 2020-04-04 00:51:26 |   MASTER-Kislovodsk | (15h 43m 47.62s , +72d 31m 22.9s) |   C |    60 | 17.3 |        
   10139 | 2020-04-04 00:52:32 |      MASTER-Tavrida | (16h 50m 13.13s , +71d 34m 54.6s) |   C |    60 | 19.4 |        
   10219 | 2020-04-04 00:53:52 |      MASTER-Tavrida | (15h 26m 54.60s , +75d 37m 30.7s) |   C |    60 | 19.3 |        
   10299 | 2020-04-04 00:55:12 |      MASTER-Tavrida | (16h 33m 27.54s , +75d 36m 07.9s) |   C |    60 | 19.3 |        
   10315 | 2020-04-04 00:55:27 |   MASTER-Kislovodsk | (17h 02m 46.31s , +71d 46m 04.3s) |   C |    60 | 16.7 |        
   11782 | 2020-04-04 01:19:55 |      MASTER-Tavrida | (16h 08m 31.96s , +78d 30m 31.9s) |   C |    60 | 19.5 |        
   11863 | 2020-04-04 01:21:16 |      MASTER-Tavrida | (15h 30m 54.56s , +76d 30m 34.7s) |   C |    60 | 19.4 |        
   11944 | 2020-04-04 01:22:37 |      MASTER-Tavrida | (16h 04m 16.55s , +76d 30m 04.3s) |   C |    60 | 19.5 |        
   12024 | 2020-04-04 01:23:57 |      MASTER-Tavrida | (16h 37m 28.83s , +76d 30m 32.4s) |   C |    60 | 19.5 |        
   12105 | 2020-04-04 01:25:18 |      MASTER-Tavrida | (17h 10m 38.63s , +76d 28m 08.5s) |   C |    60 | 19.3 |        
   12186 | 2020-04-04 01:26:39 |      MASTER-Tavrida | (16h 08m 35.80s , +78d 31m 20.0s) |   C |    60 | 19.7 |        
   12266 | 2020-04-04 01:27:59 |      MASTER-Tavrida | (16h 04m 12.66s , +76d 30m 44.5s) |   C |    60 | 19.5 |        
   13592 | 2020-04-04 01:50:05 |      MASTER-Tavrida | (17h 10m 34.15s , +76d 29m 37.1s) |   C |    60 | 19.3 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
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