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GCN Circular 18767

Subject

V404Cyg Swift Trigger 668097: AbAO optical observations

Date

2015-12-30T10:31:22Z (9 years ago)

From

Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>

E. Mazaeva (IKI),  R. Inasaridze (AbAO), A. Volnova (IKI), V. Ayvazian 
(AbAO), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB 
follow-up collaboration:

We observed V404 Cyg after Swift BAT trigger 668097 (Barthelmy et al., GCN 
18716Not found
 
 
) with AS-32 (0.7m) telescope of Abastumani Observatory. Observations 
started on Dec., 28 (UT) 16:19:10. We obtained several unfiltered images of 
60 s exposure. The source has a flare during our observations, the maximal 
brightness of the source during our observations is 15.5m at (UT) 16:22:39. 
It is also apparent that we observed only a small episode of new flaring 
activity of V404 Cyg.

Preliminary light curve of the V404 Cyg can be found in 
http://grb.rssi.ru/V404_Cyg/v404Cyg_AAO_20151228_lc.png

Photometry is based on following USNO-B1.0 stars

USNO-B.1_id  R2

1238-0434779 13.52
1238-0434864 14.12