GCN Circular 30206
Subject
GRB 210610B: Zwicky Transient Facility afterglow detection
Date
2021-06-11T18:11:12Z (3 years ago)
From
Daniel Perley at Liverpool JMU <d.a.perley@ljmu.ac.uk>
D. A. Perley (LJMU), Y. Yao (Caltech), A. Y. Q. Ho (UC Berkeley), M.
Bulla (Stockholm/OKC), I. Andreoni (Caltech), M. Coughlin (U.
Minnesota), and E. Kool (Stockholm/OKC) report:
The Zwicky Transient Facility (ZTF; ATel #11266) observed the location
of GRB 210610B (Page et al., GCN 30170) during the night of 2021-06-11
UT as part of the regular operations of the ZTF high-cadence partnership
survey. Four separate observations of the field (ZTF field ID 533) were
obtained between 2021-06-11 05:34:44 and 2021-06-11 08:38:29, two each
in g-band and r-band.
The associated optical transient (e.g., Page et al., GCN 30170; Kumar et
al., GCN 30174) was automatically identified by the ZTF image
subtraction pipeline and assigned the identifier ZTF21abfmpwn. The
source was independently flagged as a fast transient candidate by both
the ZTF fast-transient filter pipeline developed by A. Ho and Y. Yao
(Perley et al. 2021, arXiv:2103.01968) and by the ZTFReST pipeline
(Andreoni et al. 2021, arXiv:2104.06352), on the basis of its rapid
evolution over the course of the night and coincidence with a galaxy in
Pan-STARRS and Legacy Survey reference imaging.
We provide the following photometry:
MJD t_GRB(d) filter magnitude
59376.2324 0.4050 g 18.49 +/- 0.10
59376.2751 0.4477 r 18.29 +/- 0.07
59376.3206 0.4932 r 18.44 +/- 0.07
59376.3600 0.5326 g 18.81 +/- 0.07
Photometry is as provided by the ZTF alert packets and is
reference-subtracted. Magnitudes are AB and are not corrected for
Galactic extinction.
ZTF is supported by the National Science Foundation under Grant No.
AST-2034437 and a collaboration including Caltech, IPAC, the Weizmann
Institute for Science, the Oskar Klein Center at Stockholm University,
the University of Maryland, Deutsches Elektronen-Synchrotron and
Humboldt University, the TANGO Consortium of Taiwan, the University of
Wisconsin at Milwaukee, Trinity College Dublin, Lawrence Livermore
National Laboratories, and IN2P3, France. Operations are conducted by
COO, IPAC, and UW.
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