GCN Circular 15810
Subject
GRB 140209A: optical observations
Date
2014-02-09T10:37:54Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
L. Elenin (KIAM), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of
larger GRB follow-up collaboration:
We observed of the field of the Swift GRB 140209A (Cenko et al., GCN
15808) with 0.4-m telescope of ISON-NM observatory starting on Feb., 9 (UT)
07:43:39. Series of 30 s unfiltered exposure were obtained. In the combined
images we do not detect afterglow reported by Perley (GCN 15809).
However we detect possible object (#2) in coordinates (J2000) 05 25 25.55
+32 27 57.2 (uncertainties of 1 arcsec) which is the BAT localization circle
(Cenko et al., GCN 15808) and not present on DSS2(R). The object was
detected only on the combined image of first 10 frames, and not detected on
later combine images.
Preliminary photometry is based on USNO-B1.0 nearby stars:
UT mid, Filter Exposure, OT (3 sigma upper limit), object #2
s
07:45:32 none 10*30 > 18.7 18.2
+/- 0.2
07:58:47 none 10*30 > 18.4 n/d
08:14:05 none 10*30 > 18.3 n/d