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GCN Circular 30463

Subject
Fermi trigger No 648033323: Global MASTER-Net observations report
Date
2021-07-15T09:30:18Z (3 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),

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-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB210715.39 (trigger No 648033323,19h 30m 31.20s , +15d 07m 12.0s, R=5.22) errorbox  96 sec after notice time and 123 sec after trigger time at 2021-07-15 09:17:22 UT, with upper limit up to  17.1 mag. The observations began at zenith distance = 84 deg. The sun  altitude  is -28.2 deg. 

The galactic latitude b = -2 deg., longitude l = 51 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1660782

We obtain a following upper limits.  

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

     129 | 2021-07-15 09:17:22 |         MASTER-OAFA | (19h 26m 24.13s , +15d 46m 04.3s) |   C |    10 | 16.4 |        
     167 | 2021-07-15 09:17:55 |         MASTER-OAFA | (19h 26m 24.66s , +15d 47m 09.4s) |   C |    20 | 16.5 |        
     211 | 2021-07-15 09:18:35 |         MASTER-OAFA | (19h 26m 30.68s , +15d 46m 10.2s) |   C |    30 | 16.8 |        
     266 | 2021-07-15 09:19:24 |         MASTER-OAFA | (19h 26m 23.73s , +15d 45m 12.1s) |   C |    40 | 17.0 |        
     330 | 2021-07-15 09:20:24 |         MASTER-OAFA | (19h 26m 31.03s , +15d 45m 15.0s) |   C |    50 | 17.1 |        
     405 | 2021-07-15 09:21:33 |         MASTER-OAFA | (19h 26m 26.61s , +15d 46m 59.4s) |   C |    60 | 17.1 |        
Filter C is a clear (unfiltred) band. 


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