GCN Circular 4637
Subject
GRB 060202: Near-IR Observation with UKIRT/WFCAM
Date
2006-02-03T12:30:56Z (18 years ago)
From
Yuko Kakazu at U of Hawaii/Inst. for Astro. <kakazu@ifa.hawaii.edu>
W-H. Wang (UH/IfA), Y. Kakazu (UH/IfA), B. P. Schmidt (MSO-ANU),
and L. L. Cowie (UH/IfA)
We have imaged the field GRB060202 (Fox et al., GCN 4629)
with the UKIRT Wide Field Camera in J and K-band filters from
approximately UT 05:00 to 08:20 on Feb 03.
Observations consisted of 10s expsosures in both J and K with a 9-point
dither pattern with +/-6.4" and 12.8" offsets.
Total integration times for J and K are 60 and 72 minutes, respectively.
Images were processed using the UKIRT real-time pipeline ORACDR and we
tried to obtain a better background subtraction on the final coadded image.
The final image quality is limited by the poor seeing at low elevation and
telescope pointing, and has a PSF of 2".
We detected a faint source inside the revised 4" XRT error circle
(Morris et al., GCN 4632) in K-band images.
The location of this source is:
RA = 02:23:22.94, DEC = +38:23:03.69 (J2000.0)
This is consistent with the Keck/LRIS I-band detection reported
by Cenko et al. (GCN 4636) within 1".
The magnitude of this source is K = 19.86 with 3" aperture diameter,
using nearby 2MASS stars for calibration.
A PSF fit, however, suggests the point component may be almost a magnituder
fainter and there may be some underlying diffuse emission.
In the J band image, we found no source within the XRT error circle
to a 1 sigma limiting magnitude of J > 22.74 [2MASS].