TITLE:   GCN CIRCULAR
NUMBER:  18411
SUBJECT: GRB 151006A: OSN optical upper limit
DATE:    15/10/07 17:43:58 GMT
FROM:    Samantha Oates at MSSL  <sro@mssl.ucl.ac.uk>

S. R. Oates (IAA-CSIC), S. Jeong (IAA-CSIC/SKKU), A. Sota, J. C. Tello (IAA-CSIC),
A.J. Castro-Tirado (IAA-CSIC/UMA), S. B. Pandey (ARIES Nainital) report on behalf
of a larger collaboration:

We observed the field of GRB 151006A (Kocevski et al., GCN Circ. 18398) with the 1.5m
OSN telescope at Observatorio de Sierra Nevada (Spain). The observations
were carried out in the I band on Oct 7.13159-7.17369 (17.24 - 18.25 hours
post bust). We do not detect any new optical source within the enhanced XRT 
error circle (Goad et al., GCN Circ. 18403) down to a limiting magnitude of I ~21mag.