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GCN Circular 17489

GRB 150222A: Mondy optical observations
2015-02-22T22:42:58Z (9 years ago)
Alexei Pozanenko at IKI, Moscow <>
E. Mazaeva (IKI), A. Volnova (IKI), E. Klunko (ISTP), I. Korobtsev 
(ISTP), M. Eselevich (ISTP), A. Pozanenko (IKI) report on behalf of 
larger GRB follow-up collaboration:

We observed the field of GRB 150222A  (Bernardini  et al., GCN 17486) 
with AZT-33IK telescope of Sayan observatory (Mondy)  starting on Feb., 
22 (UT) 17:48:56. We obtained 37 images in R-filter of 120 s exposure. 
Within the Swift-XRT error circle (Bernardini  et al., GCN 17486) we 
marginally detected optical  source with a magnitude of R=22.15+/-0.25 
at 0.06201 days after trigger (mid time). Photometry of the source is 
based on nearby USNO-B1.0 (R2) stars. At this time we cannot confirm 
variability or fading nature of the source.
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