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GCN Circular 31535

Subject
Fermi GRB 220131A: Global MASTER-Net observations report
Date
2022-01-31T15:30:11Z (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, T.Pogrosheva, E.Minkina,
A.Chasovnikov, V.Topolev, V.Grinshpun, D.Kuvshinov,  D. Cheryasov
(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),

B.L.Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez,
M.L.H.Rodriguez (INAOE, OAGH)

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

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


MASTER-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 220131A ( Fermi GBM team, GCN 31532) errorbox  34431 sec after notice time and 34458 sec after trigger time at 2022-01-31 15:14:46 UT, with upper limit up to  16.1 mag. Observations started at twilight.  The observations began at zenith distance = 72 deg. The sun  altitude  is -10.1 deg. 

The galactic latitude b = -34 deg., longitude l = 226 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1865459

We obtain a following upper limits.  

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

     177 | 2022-01-31 05:43:10 |             MASTER- | (04h 59m 52.03s , -25d 04m 35.3s) |   C |    30 | 19.1 |        
     177 | 2022-01-31 05:43:10 |             MASTER- | (04h 59m 15.60s , -24d 36m 30.4s) |   C |    30 | 19.1 |        
     233 | 2022-01-31 05:44:01 |             MASTER- | (04h 59m 50.06s , -25d 03m 13.6s) |   C |    40 | 19.3 |        
     233 | 2022-01-31 05:44:01 |             MASTER- | (04h 59m 13.57s , -24d 35m 08.5s) |   C |    40 | 19.4 |        
     299 | 2022-01-31 05:45:02 |             MASTER- | (04h 59m 50.19s , -25d 04m 45.2s) |   C |    50 | 19.4 |        
     299 | 2022-01-31 05:45:02 |             MASTER- | (04h 59m 13.63s , -24d 36m 39.9s) |   C |    50 | 19.4 |        
     380 | 2022-01-31 05:46:13 |             MASTER- | (04h 59m 52.27s , -25d 03m 33.1s) |   C |    70 | 19.4 |        
     380 | 2022-01-31 05:46:13 |             MASTER- | (04h 59m 15.65s , -24d 35m 27.6s) |   C |    70 | 19.5 |        
     647 | 2022-01-31 05:50:15 |             MASTER- | (05h 02m 37.43s , -25d 08m 44.0s) |   C |   120 | 19.2 |        
     647 | 2022-01-31 05:50:15 |             MASTER- | (05h 02m 01.32s , -24d 40m 32.8s) |   C |   120 | 19.4 |        
     798 | 2022-01-31 05:52:36 |             MASTER- | (05h 02m 42.69s , -25d 09m 58.3s) |   C |   140 | 19.4 |        
     798 | 2022-01-31 05:52:36 |             MASTER- | (05h 02m 06.36s , -24d 41m 47.7s) |   C |   140 | 19.4 |        
     979 | 2022-01-31 05:55:17 |             MASTER- | (05h 02m 36.99s , -25d 11m 14.6s) |   C |   180 | 19.4 |        
     979 | 2022-01-31 05:55:17 |             MASTER- | (05h 02m 00.46s , -24d 43m 04.1s) |   C |   180 | 19.4 |        
    1181 | 2022-01-31 05:58:39 |             MASTER- | (05h 02m 44.33s , -25d 11m 28.1s) |   C |   180 | 19.4 |        
    1181 | 2022-01-31 05:58:39 |             MASTER- | (05h 02m 07.65s , -24d 43m 17.4s) |   C |   180 | 19.6 |        
   34488 | 2022-01-31 15:14:46 |   MASTER-Kislovodsk | (04h 57m 14.66s , -21d 49m 09.4s) |   C |    60 | 15.8 |        
   34568 | 2022-01-31 15:16:06 |   MASTER-Kislovodsk | (04h 48m 58.53s , -25d 37m 44.3s) |   C |    60 | 15.3 |        
   34889 | 2022-01-31 15:21:27 |   MASTER-Kislovodsk | (05h 05m 52.82s , -25d 38m 51.8s) |   C |    60 | 15.9 |        
   34969 | 2022-01-31 15:22:47 |   MASTER-Kislovodsk | (05h 05m 15.31s , -19d 30m 52.5s) |   C |    60 | 12.3 |        
   34969 | 2022-01-31 15:22:47 |   MASTER-Kislovodsk | (05h 09m 40.56s , -19d 55m 18.4s) |   C |    60 | 15.8 |        
   35050 | 2022-01-31 15:24:08 |   MASTER-Kislovodsk | (05h 01m 17.79s , -23d 44m 50.2s) |   C |    60 | 16.1 |        
Filter C is a clear (unfiltred) band. 


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