GCN Circular 15729
Subject
GRB 140114A: P60 Observations
Event
Date
2014-01-14T13:18:09Z (12 years ago)
From
S. Bradley Cenko at NASA/GSFC <brad.cenko@nasa.gov>
S. B. Cenko (NASA/GSFC) reports on behalf of a larger collaboration:
We imaged the location of GRB140114A (Troja et al., GCN 15728) with the robotic Palomar 60 inch telescope. Observations were obtained in the r', i', and z' filter beginning at 12:01 UT on 2014 January 14 (~ 3 minutes after the Swift trigger). The seeing was relatively poor throughout the observations (~ 3").
We do not detect any emission at the location of the XRT counterpart. Using several nearby point sources from SDSS for reference, we calculate the following upper limits in coadded images:
i' > 20.8 mag at a mean epoch of dt ~ 14 min
r' > 21.2 mag at a mean epoch of dt ~ 15 min
z' > 20.0 mag at a mean epoch of dt ~ 16 min