Discovery certificate for object 2019ytf
TNS Astronomical Transient Report No. 56533 [ 2019TNSTR2719....1S ]

Date Received (UTC): 2019-12-28 16:56:00
Sender: Dr. Graham Smith
Reporting Group: GLGW     Discovery Data Source: GLGW

Graham P. Smith (Birmingham), Matt Nicholl (Birmingham), Keren Sharon (Michigan), Matteo Bianconi (Birmingham), Watson P. Varricatt (UKIRT), Sam Benigni (UKIRT), Evan J. Ridley (Birmingham) report/s the discovery of a new astronomical transient.

IAU Designation: AT 2019ytf
Discoverer internal name: GLGWc19b
Coordinates (J2000): RA = 21:35:20.110 (323.833792) DEC = +04:55:19.80 (4.922167)
Discovery date: 2019-12-20 05:44:00 (JD=2458837.7388889)


Remarks: Candidate kilonova candidate to LIGO/Virgo's S191216ap (GCN #26454), located within the HAWC sky localisation (GCN #26472).

Photometry

Discovery (first detection):
Discovery date: 2019-12-20 05:44:00
Flux: 20.6 ABMag
Filter: Other-
Instrument: Other
Telescope: Other

Remarks: UKIRT/WFCAM z-band.

Last non-detection:
Archival info: Other
Remarks: Not detected in Pan-STARRS1 z-band.

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2019ytf