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GCN Circular 33799

GRB 230512A: Zwicky Transient Facility non-detection of GRB afterglow candidate
2023-05-14T17:10:39Z (a year ago)
Tomas Ahumada at U. of Maryland <>
Tomas Ahumada (CIT), Michael Coughlin (UMN), Igor Andreoni (UMD), Varun
Bhalerao (IITB) on behalf of the ZTF collaboration:

We analyze the ZTF images containing the afterglow candidate (Belkin et
al., GCN Circ. 33796) and no sources were found up to the following limits:

UTC observation , t-t0 , filter, upper limit
2023-05-13 06:33:14, 1.003 , r , 21.02 mag
2023-05-13 06:25:09, 0.998 , g , 20.83 mag

ZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC,
USA, WIS, Israel; OKC, Sweden; JSI/UMd, USA; U Washington, USA; DESY,
Germany; MOST, Taiwan; UW Milwaukee, USA; LANL USA; Tokyo Tech, Japan;
IITB, India; IIA, India; LJMU, UK; TTU, USA; SDSU, USA and USyd, Australia.
ZTF acknowledges the generous support of the NSF under AST MSIP Grant No
GROWTH acknowledges generous support of the NSF under PIRE Grant No 1545949.
Alert distribution service provided by DIRAC@UW (Patterson et al. 2019).
Alert database searches are done by AMPEL (Nordin et al. 2019) and Kowalski
(Duev et al. 2019). GROWTH India telescope is located at the Indian
Astronomical Observatory (Hanle), operated by the Indian Institute of
Astrophysics (IIA). GROWTH-India project is supported by SERB and
administered by IUSSTF, under grant number IUSSTF/PIRE
Program/GROWTH/2015-16 and IUCAA.

Tomás Ahumada (he/him)
Ph.D. Candidate
Department of Astronomy
University of Maryland, College Park
NASA <> Goddard Space Flight Center, Code 661
B.Sc. Astronomy, Pontificia Universidad Católica de Chile

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