GRB 040924: Observation by the Subaru Telescope
TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 2742
SUBJECT: GRB 040924: Subaru NIR observation
DATE: 04/09/25 05:47:26 GMT
FROM: Nobuyuki Kawai at Tokyo Tech
H. Terada and M. Akiyama (Subaru Telescope, NAOJ) report:
"We observed the field of the optical afterglow candidate (Fox and
Moon, GCN 2734) of GRB 040924 (=H3564, Fenimore et al., GCN 2735) in
the K'-band with IRCS on the 8.2m Subaru Telescope at 14:12-14:23 UT
on September 24 (2.4 hours after the burst).
At the position of the OT candidate, we detected a source
with magnitude K'= 17.5."
Finding Chart
Instrument: Infrared Camera and Spectrograph (IRCS)
Band: K'
Integration: 14:12 -- 14:23 09/24/2004 (UT)
Effective exposure: 8 min
Size: 75" x 75"
Second epoch image
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Date and Time (UT): 15:07-15:41 09/25/2004
Magnitude: 20.4mag
Integration Time: 1200sec
Band: K'-band
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Note: The size of the red square is 6"x6".
The cross shows the position of the afterglow in the first-epoch image.
Positional error is estimated to be about 0.2".