[vsnet-grb-info 28267] Fermi trigger No 647120009: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  30370
SUBJECT: Fermi  trigger No 647120009: Global MASTER-Net observations report 
DATE:    21/07/04 22:33:41 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-IAC robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB210704.81 (trigger No 647120009,10h 54m 55.20s , +58d 51m 36.0s, R=1) errorbox  4506 sec after notice time and 4562 sec after trigger time at 2021-07-04 20:49:27 UT, with upper limit up to  19.4 mag. Observations started at twilight.  The observations began at zenith distance = 47 deg. The sun  altitude  is -9.7 deg. 

The galactic latitude b = 53 deg., longitude l = 147 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1652513

We obtain a following upper limits.  

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

    4593 | 2021-07-04 20:49:27 |          MASTER-IAC | (11h 09m 28.26s , +58d 15m 22.5s) |   C |    60 | 15.8 |        
    4593 | 2021-07-04 20:49:27 |          MASTER-IAC | (10h 54m 00.43s , +58d 20m 53.5s) |   C |    60 | 15.5 |        
    5034 | 2021-07-04 20:56:48 |          MASTER-IAC | (11h 09m 21.51s , +58d 16m 01.1s) |   C |    60 | 16.7 |        
    5034 | 2021-07-04 20:56:48 |          MASTER-IAC | (10h 53m 52.96s , +58d 21m 33.2s) |   C |    60 | 16.3 |        
    5274 | 2021-07-04 21:00:48 |          MASTER-IAC | (10h 40m 26.07s , +58d 14m 31.1s) |   C |    60 | 16.9 |        
    5434 | 2021-07-04 21:03:28 |          MASTER-IAC | (10h 46m 41.09s , +60d 10m 20.6s) |   C |    60 | 17.2 |        
    5715 | 2021-07-04 21:08:09 |          MASTER-IAC | (11h 09m 29.05s , +58d 16m 28.9s) |   C |    60 | 17.5 |        
    5715 | 2021-07-04 21:08:09 |          MASTER-IAC | (10h 53m 59.34s , +58d 22m 01.4s) |   C |    60 | 17.3 |        
    6420 | 2021-07-04 21:18:54 |          MASTER-IAC | (10h 53m 46.80s , +58d 57m 10.4s) |  P| |   180 | 18.5 |        
    6600 | 2021-07-04 21:18:54 |          MASTER-IAC | (10h 53m 46.80s , +58d 57m 10.4s) |  P| |   540 | 19.4 |  Coadd 
    6420 | 2021-07-04 21:18:54 |          MASTER-IAC | (10h 52m 04.99s , +59d 03m 53.7s) |  P- |   180 | 18.1 |        
    6600 | 2021-07-04 21:18:54 |          MASTER-IAC | (10h 52m 04.99s , +59d 03m 53.7s) |  P- |   540 | 19.0 |  Coadd 
    6620 | 2021-07-04 21:22:14 |          MASTER-IAC | (10h 53m 46.76s , +58d 55m 40.7s) |  P| |   180 | 18.5 |        
    6620 | 2021-07-04 21:22:14 |          MASTER-IAC | (10h 52m 04.99s , +59d 02m 24.3s) |  P- |   180 | 18.2 |        
    6819 | 2021-07-04 21:25:34 |          MASTER-IAC | (10h 53m 49.98s , +58d 57m 22.0s) |  P| |   180 | 18.6 |        
    6819 | 2021-07-04 21:25:34 |          MASTER-IAC | (10h 52m 08.16s , +59d 04m 05.5s) |  P- |   180 | 18.3 |        
    6961 | 2021-07-04 21:28:55 |          MASTER-IAC | (10h 40m 23.69s , +58d 15m 18.6s) |   C |    60 | 18.5 |        
    7121 | 2021-07-04 21:31:35 |          MASTER-IAC | (10h 46m 40.60s , +60d 09m 18.4s) |   C |    60 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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