GCN Circular 17980
Subject
V404 Cyg activity (Swift, Fermi, INTGRAL, KONUS, MAXI detection): optical observations in TSHAO, Khureltogot, and AAO
Date
2015-06-28T11:27:33Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), S. Schmalz (AIP), I. Reva (Fesenkov Astrophysical
Institute), R. Inasaridze (AAO), N. Tungalag (Research Center of
Astronomy and Geophysics MAS), I. Molotov (KIAM), A. Volnova (IKI), A.
Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
We are observing (Mazaeva et al, GCN 17940) the V404 Cyg activity
detected by BAT/Swift (Barthelmy et al., GCN 17929), GBM/Fermi (Younes,
GCN 17932; Jenke GCN 17935), Konus-Wind (Golenetskiiet al., GCN
17938), MAXI (Negoro et al., ATel #7646), and INTEGRAL (Roque et al.,
ATel #7693) with Zeiss-1000 (East) 1-m telescope of Tien Shan
Astronomical Observatory, ORI-40 0.4m telescope of ISON-Khureltogot and
AS-32 0.7m telescope of Abastumani observatory. The V404 Cyg optical
activity reported by many observatories is clearly visible in our
observations on time scale of at least 60 s (time exposures of our
observations in R and Clear filters are 60 and 30 s).
Preliminary light curves of the V404 Cyg activity in R-band are following:
overall light curve obtained till now (no all data still reduced)
http://grb.rssi.ru/V404_Cyg/v404_v12.png
and zoom of each day since initial Swift trigger (Barthelmy et al., GCN
17929)
http://grb.rssi.ru/V404_Cyg/v404_v11a_0d.png
http://grb.rssi.ru/V404_Cyg/v404_v11b_1d.png
http://grb.rssi.ru/V404_Cyg/v404_v11c_2d.png
http://grb.rssi.ru/V404_Cyg/v404_v11d_3d.png
http://grb.rssi.ru/V404_Cyg/v404_v11e_6d.png
http://grb.rssi.ru/V404_Cyg/v404_v11f_9d.png
Photometry is based on following USNO-B1.0 stars
ID R2
1238-0434779 13.52
1238-0434864 14.12