GCN Circular 16387
Subject
GRB 140606B / iPTF 14bfu: MOSFIRE NIR imaging
Date
2014-06-12T02:11:11Z (10 years ago)
From
Daniel Perley at Caltech <dperley@astro.caltech.edu>
D. A. Perley (Caltech), M. Kasliwal (Carnegie), L. P. Singer, Y. Cao
(Caltech), and K. Tinyanont (Harvey Mudd) report:
Beginning at 12:57 UT on 2014-06-08 we observed the field of iPTF14bfu
(Singer et al., GCN 16360), the optical counterpart of GRB 140606B
(Burns et al., GCN 16363), using the imaging mode of MOSFIRE on the Keck
I 10m telescope. A sequence of nine 23-second images was acquired in the
Ks filter.
Calibrating relative to 2MASS stars in the image, we measure a magnitude of:
Ks = 19.50 +/- 0.06 (Vega, or Ks = 21.34 AB)
at a mid-time of 2.411 days after the initial trigger.
We also measure an improved astrometric position (relative to 2MASS) of:
21:52:29.961 +32:00:50.66 (J2000, +/- 0.2")