GCN Circular 1822
Subject
GRB030115, afterglow candidate
Date
2003-01-16T15:13:53Z (22 years ago)
From
Arne A. Henden at USNO/USRA <aah@nofs.navy.mil>
F. Vrba (USNO), C. Luginbuhl (USNO), A. Henden (USRA/USNO)
report on behalf of the USNO GRB team:
We have imaged the field of GRB030115 (Kawai et al., GCN 1816)
at B and V with the NOFS 1.0m telescope on 030115 UT, at J and
H with the NOFS 1.55m telescope on 030115 UT, and at H on
030116 UT (poor seeing). The B and V data only goes roughly as
deep as DSS-2 due to cirrus and moonlight; the J and H datasets go
significantly deeper than either DSS-2 or 2MASS.
At the position of the afterglow candidate suggested by Levan et al.
(GCN 1818) we confirm a fading object, visible on the 030115 UT H-band
image but not on the 030116 UT H-band image. We measure the position
of the counterpart on the 030115 UT image as:
11:18:32.61 +15:02:59.9 J2000
using the USNO-A2.0 reference catalog; estimated coordinate
errors are +/- 200mas. These coordinates can be improved.
Depending on weather, we expect to be able to calibrate this
field at JHK within the next few nights. We also expect to
do a shallow BVRI calibration, extending it fainter when
closer to new moon.