[vsnet-grb-info 16659] V404 Cyg outburst (Swift trigger 643949 ): TSHAO optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Jun 17 23:52:25 JST 2015
TITLE: GCN CIRCULAR
NUMBER: 17940
SUBJECT: V404 Cyg outburst (Swift trigger 643949 ): TSHAO optical observations
DATE: 15/06/17 14:52:17 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at iki.rssi.ru>
E. Mazaeva (IKI), I. Reva (Fesenkov Astrophysical Institute), A. Volnova
(IKI), A. Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
We observed the V404 Cyg outburst detected by BAT/Swift (Barthelmy et
al., GCN 17929), GBM/Fermi (Younes, GCN 17932; Jenke GCN 17935), and
Konus-Wind (Golenetskiiet al., GCN 17938) with Zeiss-1000 (East) 1-m
telescope of Tien Shan Astronomical Observatory. Observations started on
June, 15 (UT) 18:50:44 and continued on June 16. We obtained several
images in R-filter. The V404 Cyg optical outburst reported early (Gazeas
et al, GCN 17931; Oates GCN 17933) is clearly visible. The V404 Cyg
is overexposed in our initial images but can be recovered with more
detailed analysis.
Preliminary light curve of the V404 Cyg can be found in
http://grb.rssi.ru/V404_Cyg/v404_20150615_lc.png
Photometry is based on following USNO-B1.0 stars
ID R2
1238-0434779 13.52
1238-0434864 14.12
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