GCN Circular 119
Subject
GRB 980613 Near-IR observations
Date
1998-06-23T20:36:15Z (26 years ago)
From
Jeff Goldader at STScI <goldader@stsci.edu>
J. Goldader (STScI), M. Beasley (U. Colorado), M. Hanson (Steward
Observatory, U. Arizona), and P. Conti (U. Colorado) report:
We imaged part of the initial 8 arcminute diameter error
circle of GRB 980613 (Piro & Costa, GCN 99) at K (2.2 micron) using
ONIS on the KPNO 4m telescope. Our observations covered approximately
(RA=10h 18m 23.90s, DEC=+71d 28' 25") through (RA=10h 17m 29.10s,
DEC=+71d 31' 25"), and also (RA=10h 17m 26.24s, DEC=+71d 28' 25") through
(RA=10h 16m 54.30s, DEC=+71d 31' 25") (J2000.0), and were made between
1998 June 14.22 and 14.26 UT. No objects not present on the DSS
were observed, to a limiting point-source magnitude of K=18.0 +/- 0.2
(3 sigma, estimated by spreading flux evenly over a 4x4 pixel box) in
seeing of ~0.7 arcsec FWHM. The fields observed fall north
of, and do not include, the positions of the fading X-ray
source 1SAX J1017.9+7127 (Costa et al., IAUC 6939; Piro et al.,
GCN 104) and the possibly associated optical transient reported by
Hjorth et al. (GCN 109).
This report may be cited.