GCN Circular 1557
Subject
XRF 020903: R band observations
Date
2002-09-29T21:36:32Z (22 years ago)
From
Andrew S. Fruchter at STScI <fruchter@mindspring.com>
A. Fruchter, L. Strolger, B. Mobasher, J. Rhoads, A. Levan, I. Burud
(STScI), A. Becker (Lucent) report for a larger collaboration:
We observed the field of XRF 020903 on both September 3.1 and 9.1 (UT) using
the Mosaic imager on the CTIO 4-m telescope. Images were taken in B, R and I
on the first night and in only R on the second. An image subtraction
performed shortly after the second night showed no variability consistent with
that expected of a GRB/XRF.
In light of the report of the possible discovery of a counterpart to this
object (GCN 1554) we have re-examined our data. We find that the object
cited as the possible counterpart declined by approximately 0.2 mags in R
between our two epochs.
Unfortunately, we do not have a reliable absolute calibration of the field at
this moment. We expect that a better calibration and more complete analysis
will be available on a relatively short timescale.