[vsnet-grb-info 15880] GRB 141212A: Khureltogot optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17168
SUBJECT: GRB 141212A: Khureltogot optical upper limit
DATE:    14/12/12 20:09:31 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

E. Mazaeva (IKI), S. Schmalz (AIP), N. Tungalag (Research Center of 
Astronomy and Geophysics MAS),  A. Volnova (IKI), I.Molotov (KIAM), A. 
Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:

We observed the field of GRB 141212A (Ukwatta et al., GCN 17158) with 
ORI-40 telescope of Khureltogot observatory. We obtained 2 hours of 
unfiltered images on Dec. 12 starting on (UT) 12:46:14.  In a combined 
image of the first 5 frames we  do not detect any optical source within 
  enhanced Swift-XRT position (Osborne et al., GCN 17164). Preliminary 
photometry is following

Date        UT start  t-T0       Filter  Exp.   ULimit (3sigma)
                       (mid, days)          (s)


2014-12-12  12:46:14  0.02422    R       5*60   18.5


The photometry is based on USNO-B1.0 stars
USNO-B1_id      RA	         DEC	        R2
1081-0038366	039.120895	+18.127567	16.32	
1081-0038391	039.149945	+18.154739	17.15	
1081-0038340	039.085725	+18.167617	14.41