GCN Circular 12973
Subject
GRB120219A: Keck Observations
Date
2012-02-20T12:22:23Z (13 years ago)
From
Daniel Perley at Caltech <dperley@astro.caltech.edu>
D. A. Perley and E. Bellm (Caltech) report:
We imaged the location of GRB 120219A (Swenson et al., GCN 12964) with
the Keck I telescope (+ LRIS) on 2012-02-20 (UT) between 10:22-10:41 UT.
Observations suffered from strong attenuation due to clouds and poor
seeing (>2 arcsec). In a stack of our two deepest individual 200 second
R-band frames (at 10:27 and 10:32) UT, we detect no source to a limiting
magnitude of R > 24.0 mag. The afterglow is also not detected in our
g-band or I-band images. If the reported object of Xin et al. (GCN
12966) represents a real source, this apparent fading confirms it as the
afterglow of GRB 120219A.