GCN Circular 6420
Subject
GRB 070517: Gemini optical imaging
Event
Date
2007-05-19T04:44:01Z (19 years ago)
From
Derek Fox at PSU <dfox@astro.psu.edu>
D.B. Fox (Penn State), P.A. Price (Hawaii), and E. Berger (Carnegie
Observatories) report:
"We observed the refined XRT localization (Vergani & Romano, GCN 6414)
of GRB 070517 (Vergani et al., GCN 6411) with the Gemini South
telescope + GMOS-S, in a series of exposures beginning 03:23 UT on May
18, 2007.
Within the refined XRT localization we identify a point-like source at
coordinates R.A. 18:30:29.12, Dec -62:17:50.7 (uncertainty of <0.75"
in each coordinate). This source is not present in DSS images of the
region, although at an estimated brightness of r'=22.1 mag, i'=22.0
mag it lies beyond the depth of that survey. The source is detected
in all of our imaged filters, g', r', i', and z'.
We also identify a possible point-like source at coordinates
R.A. 18:30:29.07, Dec -62:17:52.3 (uncertainty of <1.0" in each
coordinate). This source is detected in the i' and z' bands only,
with brightness i'~24.5 mag.
Further observations will be necessary to assess the variable /
afterglow nature of these sources."