GCN Circular 12481
Subject
GRB 111022B: Gemini infrared observations
Event
Date
2011-10-23T13:19:30Z (14 years ago)
From
Andrew Levan at U.of Leicester <A.J.Levan@warwick.ac.uk>
A.J. Levan (U. Warwick), D. Fox (PSU), N.R. Tanvir (U. Leicester)
report for a larger collaboration:
"We observed the localization of GRB 111022B (Holland et al. GCN
12472) with the Gemini-North telescope, equipped with NIRI.
Observations were obtained in poor conditions (2.5" seeing) and
began 17 hours after the burst in the YJHK filters.
We find a single source within the refined XRT error circle (Beardmore
et al. GCN 12478). The source is well detected in both H and K,
with K~19.0 +/- 0.2, but only very weakly in J. Given the earlier
non-detections in the optical (Vreeswijk et al. GCN 12479) the
inferred optical-IR colour is red (R-K > 4.2), coupled with the
lack of apparent excess N_H this could be indicative of a high
redshift burst.
Analysis is ongoing, and further observations are planned."