[vsnet-grb-info 11276] GRB 111215A: OSN I-band observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  12688
SUBJECT: GRB 111215A: OSN I-band observations
DATE:    11/12/15 21:05:16 GMT
FROM:    Javier Gorosabel at IAA-CSIC  <jgu at iaa.es>

F. Aceituno (OSN,IAA-CSIC), A.J. Castro-Tirado, A. de Ugarte Postigo, J.C. Tello, J. Gorosabel (IAA-CSIC), report on behalf of a larger collaboration:

"We have observed the field of GRB 111215A (Oates et al., GCN 12681) with the 1.5m telescope at Observatorio de Sierra Nevada (OSN), Granada, Spain. The data were acquired in the I-band on Dec 15.7537 -- Dec. 15.8168 UT (starting ~4 hour post burst), with a total exposure time of 18x300s. A preliminary analysis reveals no object brighter than I=21.7 in the XRT error circle. The calibration was carried out using the USNO B1.0 catalogue."