Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 1320

GRB02033 NIR observation at KPNO
2002-04-02T01:50:29Z (22 years ago)
Atsumasa Yoshida at Inst.Phys/Chem Research <>
K. Ohta (Kyoto Univ.) and M. Akiyama (Subaru) report:

We have imaged the central region of the error circle of
GRB 020331 with the SQIID equipped to KPNO 2.1m telescope.
The field is centered on 13h16m22.7s and -17d55'23" (J2000)
with a field of view of about 5'x5'.
The J-, H-, and K-band images were taken simultaneously
at 7:06 (Apr 1st) (UT).  A total integration time is 15min 
for each band.
We have found the following two NIR objects that are not seen 
in the Digitized Sky Survey, APM catalog, and 2MASS images.
#1 13h16m29.5s -17d55'08" (J2000), J=17.7, H not measurable, K=16.8 
#2 13h16m23.2s -17d56'11" (J2000), J=17.6, H=17.2, K=16.8 
Accuracy of the coordinates is about 0.5". 
Photometry was roughly made using 2MASS objects   
exposed in the same frame; accuracy seems to be less than
0.1 mag (J-band), 0.3 mag (H-band), and 0.5 mag (K-band).
There is a possibility that these objects are not seen in
the POSS merely because they are red objects. 
If one of them will fade, it should be a candidate of the
afterglow of the GRB.  Further NIR observations are desirable. 
This message may be cited.
Looking for U.S. government information and services? Visit