GCN Circular 6407
Subject
GRB070419A: optical observations
Event
Date
2007-05-13T20:24:58Z (19 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Pozanenko (IKI), A. Shulga, A. Volnova (SAI MSU), B. Hafizov, I.
Asfandiyarov, M. Ibrahimov (MAO) on behalf of larger GRB follow up
collaboration report:
We observed optical afterglow of GRB070419A (Stamatikos et al, GCN 6302;
Chornock et al. GCN 6304) with 1.5m telescope of Maidanak observatory
(MAO). Several exposures in R-band in seeing ~1 arcsec were obtained on
Apr. 17 between (UT) 15:20 - 16:25. In a combined image the source at
(J2000) RA= 12 10 58.83 DEC= +39 55 34.06 with an error in both coordinates
of 0.15" is compatible with the coordinates of Chornock et al. (GCN 6304)
and Garnavich et al. (GCN 6406).
A photometry of the afterglow using USNO-A2.0 stars is following:
T0+ , Exposure, R_mag
0.245 d 11x300 s 22.4 +/- 0.3
Our observation is compatible with global power law decay index 0.9
(Garnavich et al. GCN 6406) suggesting no host galaxy contribution in epoch
of our observation.
The combined image can be found at
http://grb.rssi.ru/GRB070419A/GRB070419A_AZT22_R.jpg
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