GCN Circular 14758
Subject
GRB 130604A: further ISON-NM optical observation
Date
2013-06-04T11:11:35Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
L. Elenin (KIAM), V. Savanevych (KNURE), A. Bryukhovetskiy (NSFCTC), I.
Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
After further inspection of images after observation of the Swift GRB
130604A (Melandri et al., GCN 14752) with 0.45-m telescope of ISON-NM
(Elenin, et al., GCN 14756) we identified faint object (S/N ~ 3) in
coordinates (J2000) 16 40 45.34 +68 13 34.5 with uncertainty of 0.2" (in
both coordinates). Within errors this position coincides with the afterglow
candidate (Perley, GCB 14753) and the error circle of XRT reported by
Melandri et al. (GCN 14752). This object is not detected in our later
combined images and can be the afterglow of GRB 130604A. Preliminary
photometry of our images obtained in clear filter is based on USNO-B1.0
(R2) nearby stars:
UT start, T0+ Exposure, OT, UL (3 sigma)
mid,days s
06:56:11 0.0019 3x30 n/d 19.7
06:56:11 0.0035 9x30 20.3 +/- 0.3 20.0
06:56:11 0.0091 30x30 n/d 20.5
06:56:11 0.0171 60x30 n/d 20.8
Finding chart can be found at
http://grb.rssi.ru/GRB130604A/GRB130604A_ISON_NM_9x30.png
