TITLE:   GCN CIRCULAR
NUMBER:  12072
SUBJECT: GRB 110610A: 1.23m CAHA optical observations
DATE:    11/06/12 20:41:02 GMT
FROM:    Javier Gorosabel at IAA-CSIC  <jgu@iaa.es>

J. Gorosabel (IAA-CSIC, Granada), P. Kubanek (IAA-CSIC, Granada & U.  
Valencia), report on behalf of a larger collaboration:

"We have taken two optical data sets of the Swift GRB 110610A  
(Marshall et al., GCN 12065) field using the 1.23m Calar Alto  
telescope. The observations were carried out in the I-band on June  
11.0013--11.1579 UT and June 11.9093--12.1599 UT (8.67-12.44 hours and  
30.46-36.48 hours post trigger, respectively). We do not detect any  
optical source consistent with the XRT error circle (Goad et al., GCNC  
12069) down to a limiting magnitude of I=20.6 (3 sigma, calibrated  
against USNO-B1.0)".