TITLE: GCN CIRCULAR NUMBER: 15810 SUBJECT: GRB 140209A: optical observations DATE: 14/02/09 10:37:54 GMT FROM: Alexei Pozanenko at IKI, Moscow 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