[vsnet-grb-info 28533] Fermi GRB 210812A: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  30636
SUBJECT: Fermi GRB 210812A: Global MASTER-Net observations report 
DATE:    21/08/12 19:15:10 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),

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-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 210812A ( Fermi GBM team, GCN 30633) errorbox  3906 sec after notice time and 3934 sec after trigger time at 2021-08-12 17:52:35 UT, with upper limit up to  18.0 mag. Observations started at twilight.  The observations began at zenith distance = 63 deg. The sun  altitude  is -15.8 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 210812A errorbox  3968 sec after notice time and 3996 sec after trigger time at 2021-08-12 17:53:37 UT, with upper limit up to  16.9 mag. Observations started at twilight.  The observations began at zenith distance = 63 deg. The sun  altitude  is -10.7 deg. 

The galactic latitude b =  9 deg., longitude l = 132 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1688546

We obtain a following upper limits.  

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

    3965 | 2021-08-12 17:52:35 |   MASTER-Kislovodsk | (02h 39m 39.55s , +67d 43m 23.0s) |   C |    60 | 17.1 |        
    3965 | 2021-08-12 17:52:35 |   MASTER-Kislovodsk | (02h 49m 52.81s , +67d 17m 41.9s) |   C |    60 | 18.0 |        
    4027 | 2021-08-12 17:53:37 |      MASTER-Tavrida | (03h 00m 15.85s , +69d 33m 20.0s) |   C |    60 | 14.1 |        
    4045 | 2021-08-12 17:53:56 |   MASTER-Kislovodsk | (02h 23m 17.82s , +71d 30m 31.7s) |   C |    60 | 16.6 |        
    4045 | 2021-08-12 17:53:56 |   MASTER-Kislovodsk | (02h 35m 30.22s , +71d 04m 38.3s) |   C |    60 | 17.6 |        
    4250 | 2021-08-12 17:57:21 |      MASTER-Tavrida | (02h 16m 36.54s , +69d 38m 13.4s) |   C |    60 | 14.2 |        
    4866 | 2021-08-12 18:07:37 |      MASTER-Tavrida | (02h 37m 13.34s , +69d 37m 48.2s) |   C |    60 | 16.1 |        
    4927 | 2021-08-12 18:08:37 |   MASTER-Kislovodsk | (02h 39m 44.39s , +67d 43m 18.2s) |   C |    60 | 17.1 |        
    4927 | 2021-08-12 18:08:37 |   MASTER-Kislovodsk | (02h 50m 00.20s , +67d 17m 36.6s) |   C |    60 | 18.0 |        
    5175 | 2021-08-12 18:12:46 |      MASTER-Tavrida | (02h 16m 39.00s , +69d 38m 21.4s) |   C |    60 | 13.4 |        
    6543 | 2021-08-12 18:35:34 |      MASTER-Tavrida | (02h 37m 17.68s , +69d 39m 33.3s) |   C |    60 | 13.5 |        
    6623 | 2021-08-12 18:36:53 |      MASTER-Tavrida | (03h 00m 13.68s , +69d 36m 38.3s) |   C |    60 | 16.2 |        
    6781 | 2021-08-12 18:39:31 |      MASTER-Tavrida | (02h 16m 35.36s , +69d 40m 00.6s) |   C |    60 | 16.9 |        
Filter C is a clear (unfiltred) band. 


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