GCN Circular 24223
Subject
LIGO/Virgo S190425z: ZTF pre-merger limits on PS1 candidates
Event
Date
2019-04-26T14:00:03Z (7 years ago)
From
Michael Coughlin at Caltech/LIGO <mcoughli@caltech.edu>
Authors: Michael W. Coughlin (Caltech), Shreya Anand (Caltech), Tomas
Ahumada (UMD)
On behalf of the Zwicky Transient Facility (ZTF) and Global Relay of
Observatories Watching Transients Happen (GROWTH) collaborations
We have analyzed the list of objects reported in Smith et al. (24210),
and examined ZTF alerts for the same objects. We find that 7 of the
events listed below have recent, previous detections with ZTF prior to
the gravitational wave event trigger time and are likely unrelated to the
BNS event S190425z (The LIGO Scientific Collaboration and the Virgo
Collaboration, GCN 24168).
Name PS Name ZTF Name
AT2019ebu PS19pp ZTF19aasbgll
AT2019ebw PS19pq ZTF19aasazok
AT2019ecc PS19pw ZTF19aapwgpg
AT2019eck PS19qe ZTF19aapfrrw
AT2019ecl PS19qg ZTF19aasgwnp
AT2019ebr PS19qj ZTF18aaoxrvr
AT2019ebo PS19qn ZTF19aarpgau
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; TTU USA;
Tokyo Tech, Japan; IIT-B, India; IIA, India; LJMU, UK 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 filtering and follow-up co-ordination
is being undertaken by the GROWTH marshal system (Kasliwal et al.
2019).
--
Michael Coughlin
David and Ellen Lee Prize Postdoctoral Fellow
LIGO Laboratory
West Bridge, Rm. 257
California Institute of Technology
MC 100-36
Pasadena, CA 91125
email: mcoughli@ligo.caltech.edu
website: http://www.michaelwcoughlin.com
phone: +1 952 836 7113