[vsnet-grb-info 2544] Possible GRB 051221B: MDM Optical Detection
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Thu Dec 22 12:38:06 JST 2005
TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 4381
SUBJECT: Possible GRB 051221B: MDM Optical Detection
DATE: 05/12/22 03:35:54 GMT
FROM: Jules Halpern at Columbia U. <jules at astro.columbia.edu>
J. P. Halpern & S. Tyagi (Columbia U.) report:
"We observed the position of possible Swift GRB 051221B
in the R-band with the MDM 1.3m for 30 minutes starting
on Dec. 22 01:31 UT, or 5.5 hours after the BAT trigger
(Boyd et al., GCN 4376).
We find an object of R=21.8 located at
RA(J2000) = 20h 49m 34.8s
Dec(J2000) = +53d 02' 11.8"
which is consistent in position with the fading XRT source
(Page et al., GCN 4378). (We use a USNO B1.0 comparison star
at 20h 49m 36.08s, +53d 01' 29.65".)
We have not established any optical variability at this time."
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