Discovery certificate for object 2017gfo
TNS Astronomical Transient Report No. 13195

Date Received (UTC): 2017-08-20 18:27:47
Date made public: 2017-10-16
Sender: Prof. Ryan Foley
Source Group: Swope SN Survey

D. A. Coulter, C. D. Kilpatrick, M. R. Siebert, R. J. Foley (UCSC), B. J. Shappee, M. R. Drout, J. S. Simon, and A. L. Piro (Carnegie), A. Rest (STScI) report/s the discovery of a new astronomical transient.

IAU Designation: AT 2017gfo
Discoverer internal name: SSS17a
Coordinates (J2000): RA = 13:09:48.089 (197.450371) DEC = -23:22:53.35 (-23.381486)
Discovery date: 2017-08-17 23:31:12 (JD=2457983.48)

Potential host galaxy: NGC 4993
Host redshift: 0.009727

Remarks: Transient associated with LIGO/Virgo trigger G298048.

Photometry

Discovery (first detection):
Discovery date: 2017-08-17 23:31:12
Flux: 17.3 ABMag
Filter: i-Sloan
Instrument: Other
Telescope: Other

Remarks: Swope Telescope

Last non-detection:
Archival info: Other
Remarks: Not detected in Hubble Space Telescope imaging from 2017 April 28 UT to a limiting magnitude of F606W ~ 25.9 mag.

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2017gfo