[vsnet-grb-info 6231] GRB 080603A: optical observations
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sun Jun 8 07:52:34 JST 2008
TITLE: GCN CIRCULAR
NUMBER: 7860
SUBJECT: GRB 080603A: optical observations
DATE: 08/06/07 22:52:28 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at iki.rssi.ru>
V. Rumyantsev (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB
follow-up collaboration:
We observed a field of INTEGRAL GRB 080603A (Paizis et al., GCN 7790) in
R-band on June 06 between (UT) 22:32 - 23:55 with Zeiss-1000 (Simeiz)
telescope of CrAO observatory. Extended object is found ~1" south from the
position of optical afterglow (Gomboc et al., GCN 7788; Chornock et al.,
GCN 7789), and the position of the extended object is consistent with
coordinates reported by Kuin et al. (GCN 7804). Therefore, we suggest it as
a host galaxy of 080603A.
Based on USNOB1.0 star with ID 1527-0313986 at RA = 18:37:55.186, Dec.
+62:45:32.28 (R1 = 16.74) we estimated brightness of the extended object:
UT, Exposure, R_mag, UL
(mid time)
3.496 41x120 21.90 +/- 0.17 22.85
If the extended source is the host galaxy then contamination by the host can
explain slow decay of light curve noted by Kann et al. (GCN 7822).
A combined image can be found at
http://grb.rssi.ru/GRB080603A/GRB080603A_2080606.gif
The message may be cited.
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