GCN Circular 1241
Subject
GRB020127: Chandra Observations and Prospective Counterparts
Event
Date
2002-02-04T14:06:53Z (24 years ago)
From
Derek Fox at CIT <derekfox@astro.caltech.edu>
Derek W. Fox (Caltech) reports on behalf of the Caltech-NRAO-CARA GRB
colloboration:
"We have initiated a two-pointing sequence of Chandra ACIS-I
observations of this event (HETE #1902, GCN 1229) in order to identify
its X-ray counterpart. Analysis of the first 10-ksec observation
(start time Jan 31.95 UT) reveals the presence of eleven probable
X-ray sources within or near the joint HETE-IPN localization (GCN
1232). Correcting the Chandra aspect by roughly one arcsec by
reference to three bright USNO stars with X-ray counterparts in the
field, we derive the following positions, approximate counts, and
(wavdetect) uncertainties:
Source RA Dec Cts Notes
================================================================
cxo01 08 14 42.57(4) +36 49 11.2(5) 54 DPOSS
cxo02 08 14 52.00(7) +36 43 39.4(9) 18
cxo03 08 15 17.83(6) +36 39 11.9(8) 47
cxo04 08 15 24.36(2) +36 41 01.1(5) 134 USNO (faint)
cxo05 08 15 27.35(9) +36 40 51.7(12) 25
cxo06 08 15 27.93(11) +36 49 40.5(8) 27
cxo07 08 15 33.58(7) +36 46 14.8(11) 22 USNO (faint)
cxo08 08 15 39.17(6) +36 47 49.1(12) 46 USNO+2MASS
cxo09 08 15 40.77(9) +36 43 17.0(10) 19
cxo10 08 15 42.48(5) +36 45 36.1(8) 108 USNO+2MASS
cxo11 08 15 44.77(9) +36 41 13.1(8) 28
================================================================
Numbers in parentheses indicate the uncertainty in the preceding
digits. Table notes indicate the presence of a likely counterpart to
the X-ray source in one or more sky catalogs (DPOSS catalog for the
field available at http://www.srl.caltech.edu/~react/GRB020127.html).
Please note that these results are preliminary and subject to
revision. The Chandra follow-up observation is currently scheduled
for Feb 11 UT."