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GCN Circular 33783

GRB 230430A: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 704533643)
2023-05-12T20:20:45Z (a month ago)
Tomas Ahumada at U. of Maryland <>
Tomas Ahumada (CIT), Shreya Anand (CIT), Viraj Karambelkar (CIT), Robert Stein (CIT), Theophile du Laz (CIT), Michael Coughlin (UMN), Mansi Kasliwal (CIT), Simeon Reusch (DESY), Jannis Necker (DESY) report on behalf of the ZTF collaboration: We observed the localization region of the short GRB 230430A (trigger 704533643) detected by the Gamma-Ray Burst Monitor (GBM) on the Fermi satellite with the Palomar 48 inch telescope equipped with the 47 square degree Zwicky Transient Facility (ZTF; Bellm et al., 2019; Graham et al., 2019) camera. We obtained a series of g- and r-band images covering about 132.4 square degrees beginning at 2023-05-01T04:45:43.004 (~20 hours after the burst trigger time) corresponding to ~93% of the probability enclosed in the intersection between the GBM (GCN 33713) and the preliminary IPN region. Our observations contain the final IPN region (GCN 33718). Exposures reached a median depth of 21.5 mag in the g-band and 21.5 mag in the r-band. No potential counterparts were found. 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 1440341. 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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