Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 10198

GRB 091127: CAHA 1.23m I-band observations
2009-11-28T03:25:55Z (15 years ago)
Javier Gorosabel at IAA-CSIC <>
J. Gorosabel (IAA-CSIC), A. de Ugarte Postigo (INAF/OAB), V. Terron  
(IAA-CSIC), M. Fernandez (IAA-CSIC), P. Kubanek (IAA-CSIC), M. Jelinek  
(IAA-CSIC), report on behalf of a larger collaboration:

"We have detected the GRB 091127 optical afterglow (Smith et al.  GCNC  
10192; Immler  et al. GCN 10193) by means of a single I-band frame  
(Texp=120s) taken with the CAHA 1.23m Telescope. The observations,  
carried out on Nov. 28.03862-28.04000 UT (~1.5 hours post burst) under  
poor weather conditions, yielded a preliminary I-band magnitude of  
I~16.4, assuming I=13.62 for the USNO-B1.0 star located at (RA,DEC) =  
(02:26:21.063,-18:57:19.02; J2000)."
Looking for U.S. government information and services? Visit