[vsnet-grb-info 2603] GRB 060105: MDM Observation
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Fri Jan 6 22:20:19 JST 2006
TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 4440
SUBJECT: GRB 060105: MDM Observation
DATE: 06/01/06 13:18:06 GMT
FROM: Jules Halpern at Columbia U. <jules at astro.columbia.edu>
N. Zimmerman, S. Tyagi, & J. P. Halpern (Columbia U.) report:
"Using the MDM 2.4m outfitted with RETROCAM, we have obtained an upper
limit on the SDSS r-band magnitude of GRB 060105 as of Jan. 6 02:00 UT, or
19 hours after the burst. The sum of eight 5-minute exposures reveals no
new source within the refined XRT error circle (Godet et al,. GCN 4433) to
a limit of r = 21.0, as calibrated with Sloan standard stars."
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