[vsnet-grb-info 10144] GRB 110106A: CrAO optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11593
SUBJECT: GRB 110106A: CrAO optical observations
DATE:    11/01/21 21:12:26 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

V. Rumyantsev,  K. Antoniuk (CrAO), A. Pozanenko (IKI) report on behalf of 
larger GRB  follow-up collaboration:

We observed  the field of the Swift GRB 110106A (Mangano et al., GCN 11520) 
with AZT-11 telescope of CrAO starting on Jan. 06 (UT) 16:26. In the
enhanced Swift-XRT position  (Osborne al., GCN  11526) we do not detect 
optical afterglow candidate (Malesani et al., GCN 11524) up to R=21.9. We 
clearly detect the nearby galaxy outside the error circle (Malesani et al., 
GCN 11524, Piranomonte et al., GCN 11530, Gorbovskoy et al., GCN 11542). The 
photometry is based on the USNO B1.0 star 1541-0130790  (05:17:11.42 
+64:10:11.0) assuming R=17.81. The finding chart can be found at 
http://grb.rssi.ru/GRB110106A/grb110106a_110106_R_azt11.png

T0+      Filter,   Exposure, mag.
(mid, d)              (s)

0.06398  R 20x180       >21.9