[vsnet-grb-info 15909] GRB141220A: 1.23m CAHA I-band observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17197
SUBJECT: GRB141220A: 1.23m CAHA I-band observations
DATE:    14/12/20 07:52:06 GMT
FROM:    Javier Gorosabel at IAA-CSIC  <jgu at iaa.es>

J. Gorosabel (IAA-CSIC/UPV-EHU), S. Hellmich (DLR), A. de Ugarte Postigo (IAA-CSIC), S. Mottola (DLR), C. Thoene (IAA-CSIC), report on behalf of a larger collaboration:

We observed the field of GRB 141220A with the 1.23m CAHA in the I-band starting  ~8 min post burst. A bright afterglow is detected at RA(J2000)=13:00:15.76, DEC(J2000)=32:08:46:4 (+/-0.8"). We note an important discrepancy with the initial position reported by Swift.