GCN Circular 9370
Subject
GRB 090515: MMT/MMIRS NIR Upper Limit
Date
2009-05-15T22:59:17Z (15 years ago)
From
Grant Williams at Steward Observatory <ggwilli@gmail.com>
B. McLeod (CfA), G. Williams (MMTO) on behalf of the MMIRS
commissioning team report:
We observed the field of GRB 090515 (Beardmore et al. 2009, GCN 9356)
with the MMIRS instrument on the 6.5-m MMT telescope. �Observations
began at 06:44 UT, approximately 119 minutes after the Swift trigger.
We obtained 27 x 30 second exposures in the K-band. �We do not detect
any afterglow candidate in the XRT error circle in the combined image
to the following 5-sigma limiting magnitude determined using nearby
2MASS stars:
t_start (UT) � � exp t (s) � � t_start-t_0 � � Limit
-----------------------------------------------------------
06:44 � � � �27x30 � � � � � � �119 min � � �K > 19.3