[vsnet-grb-info 7814] GRB 090515: KAIT optical upper limits
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Fri May 15 14:58:06 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 9358
SUBJECT: GRB 090515: KAIT optical upper limits
DATE: 09/05/15 05:57:53 GMT
FROM: Ryan Chornock at UC Berkeley <chornock at astro.berkeley.edu>
W. Li, R. Chornock, and A. V. Filippenko (UC Berkeley) report on
behalf of the KAIT GRB team:
The Katzman Automatic Imaging Telescope (KAIT) at Lick Observatory responded to
the Swift trigger of GRB 090515 (Beardmore et al., GCN 9356) and began a
sequence of filtered and unfiltered 20s images followed by a set of three 180s
unfiltered images. We detect no new source within the XRT error circle
(Beardmore et al., GCN 9356). Individual unfiltered 20s exposures starting at
04:59:09 UT have 3-sigma limiting magnitudes (calibrated to USNO B1) of about
mag 19.1. Our combined set of 3x180s unfiltered images has an upper limit of
about mag 20.5 at a midpoint of 05:19:47 UT.
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