[vsnet-grb-info 7826] GRB 090515: MMT/MMIRS NIR Upper Limit
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sat May 16 07:59:31 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 9370
SUBJECT: GRB 090515: MMT/MMIRS NIR Upper Limit
DATE: 09/05/15 22:59:17 GMT
FROM: Grant Williams at Steward Observatory <ggwilli at 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
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