GCN Circular 10928
Subject
GRB 100615A: Additional Gemini/NIRI observations
Date
2010-07-02T22:58:46Z (14 years ago)
From
Daniel Perley at U.C. Berkeley <dperley@astro.berkeley.edu>
D. A. Perley, J. S. Bloom, S. B. Cenko, and N. R. Butler (UC Berkeley)
report:
We again observed the field of GRB 100615A (D'Elia et al. 2010, GCN
10841) using NIRI on Gemini-North between 06:06 and 07:03 on 2010-06-24
UT, at moderately high airmass. We acquired 45 images of 60 seconds
each in the K' filter, a significantly deeper integration than our
previous observation (Cenko et al., GCN 10861).
A faint object is detected slightly west of the latest online
UVOT-enhanced XRT error circle, with an aperture magnitude of K' = 21.3
+/- 0.3 mag. However, the location of this object is not consistent
with the improved X-ray localization provided by the Chandra
observations (Butler et al., GCN 10915).
A very faint possible source is visible at the Chandra location, but it
is not statistically significant (1.5-sigma). The 3-sigma limit of the
image is K' > 22.2 mag; forced photometry gives K' = 23.0 +/- 0.8 mag at
this location.
An image of the field is posted to:
http://lyra.berkeley.edu/~dperley/100615a/100615a_niri.png
