GCN Circular 15846
Subject
GRB 140215A: ISON-NM optical observations
Event
Date
2014-02-15T20:32:45Z (12 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
L. Elenin (KIAM), A. Volnova (IKI), I. Molotov (KIAM), A. Pozanenko (IKI)
report on behalf of larger GRB follow-up collaboration:
We observed of the field of the Swift GRB 140215A (Markwardt et al., GCN
15837) with 0.4-m telescope of ISON-NM observatory starting on Feb., 15
(UT) 04:08:22, i.e 72 seconds after Swift burst trigger. We took 35
unfiltered images of 30 s exposures. We clearly detect the bright optical
afterglow of GRB 140215A (Markwardt et al., GCN 15837; Cenko et al., GCN
15838) in each separate image. Coordinates of the optical afterglow
(J2000) 06 56 35.83 +41 47 11.4 (uncertainties of 0.5 arcsec) coincide with
OT coordinates (Markwardt et al., GCN 15837). Preliminary photometry is
following:
UT mid, T0+ Filter Exposure, OT, err OT
mid s
04:08:22 0.00101 none 30 13.60 0.03
04:37:01 0.02090 none 30 16.46 0.20
The photometry is based on USNO-B1.0 nearby stars:
N USNO-B1.0id RA Dec R2
1 1318-0183851 06:56:13.01 +41:49:29.2 12.37
2 1317-0181981 06:56:37.13 +41:44:34.4 14.39
3 1317-0181986 06:56:38.48 +41:44:12.8 14.50
The power law index of ~-1.2 of our light curve starting from 0.0025 days
and up to the end of our observations coincides with the index reported by
Perley and Cenko (GCN 15844).