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GCN Circular 31911

Subject
Fermi trigger No 671729344: Global MASTER-Net observations report
Date
2022-04-16T20:31:00Z (2 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, 
G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov,  D.Cheryasov, Ya.Kechin
(Lomonosov Moscow State University, SAI, Physics Department),

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

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

D. Buckley 
(South African Astronomical Observatory),

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

L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez 
(INAOE, Guillermo Haro Astrophysics Observatory),

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

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


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB220415.65 (trigger No 671729344,19h 53m 31.20s , -79d 49m 12.0s, R=3.87) errorbox  77981 sec after notice time and 1 days 13922 sec after trigger time at 2022-04-16 19:21:02 UT, with upper limit up to  17.4 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -39.6 deg. 

The galactic latitude b = -30 deg., longitude l = 314 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1944411

We obtain a following upper limits.  

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

  100352 | 2022-04-16 19:21:02 |         MASTER-SAAO | (19h 33m 08.13s , -80d 40m 10.2s) |   C |    60 | 17.3 |        
  100444 | 2022-04-16 19:22:33 |         MASTER-SAAO | (20h 21m 44.51s , -80d 33m 20.1s) |   C |    60 | 17.1 |        
  100524 | 2022-04-16 19:23:53 |         MASTER-SAAO | (20h 10m 26.98s , -78d 39m 20.4s) |   C |    60 | 17.1 |        
  100615 | 2022-04-16 19:25:24 |         MASTER-SAAO | (20h 51m 01.47s , -78d 40m 19.6s) |   C |    60 | 17.0 |        
  100710 | 2022-04-16 19:26:59 |         MASTER-SAAO | (18h 53m 05.48s , -78d 38m 11.6s) |   C |    60 | 17.2 |        
  100789 | 2022-04-16 19:28:19 |         MASTER-SAAO | (19h 33m 46.96s , -78d 40m 05.9s) |   C |    60 | 17.4 |        
  100880 | 2022-04-16 19:29:49 |         MASTER-SAAO | (18h 38m 35.97s , -82d 26m 52.7s) |   C |    60 | 17.3 |        
  100960 | 2022-04-16 19:31:09 |         MASTER-SAAO | (19h 39m 34.45s , -82d 26m 20.2s) |   C |    60 | 17.4 |        
  101051 | 2022-04-16 19:32:41 |         MASTER-SAAO | (19h 31m 53.65s , -76d 46m 26.4s) |   C |    60 | 16.9 |        
  101349 | 2022-04-16 19:37:39 |         MASTER-SAAO | (20h 06m 52.56s , -76d 44m 49.6s) |   C |    60 | 16.9 |        
  101429 | 2022-04-16 19:38:58 |         MASTER-SAAO | (19h 33m 00.95s , -80d 34m 09.7s) |   C |    60 | 17.4 |        
  101521 | 2022-04-16 19:40:30 |         MASTER-SAAO | (20h 21m 54.05s , -80d 32m 46.8s) |   C |    60 | 17.0 |        
  101601 | 2022-04-16 19:41:50 |         MASTER-SAAO | (20h 10m 22.03s , -78d 39m 45.8s) |   C |    60 | 16.9 |        
  101692 | 2022-04-16 19:43:22 |         MASTER-SAAO | (20h 51m 05.88s , -78d 38m 45.3s) |   C |    60 | 17.0 |        
  101783 | 2022-04-16 19:44:52 |         MASTER-SAAO | (18h 53m 08.10s , -78d 39m 26.3s) |   C |    60 | 17.0 |        
  101862 | 2022-04-16 19:46:12 |         MASTER-SAAO | (19h 33m 44.43s , -78d 40m 46.1s) |   C |    60 | 17.2 |        
  101954 | 2022-04-16 19:47:43 |         MASTER-SAAO | (18h 38m 39.53s , -82d 28m 08.2s) |   C |    60 | 17.2 |        
  102034 | 2022-04-16 19:49:03 |         MASTER-SAAO | (19h 39m 39.07s , -82d 26m 47.0s) |   C |    60 | 15.5 |        
Filter C is a clear (unfiltred) band. 


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