Discovery certificate for object 2017ket
TNS Astronomical Transient Report No. 72040 [ 2020TNSTR1567....1R ]

Date Received (UTC): 2020-05-26 10:12:38
Sender: Ms. Ine Theunissen
Reporting Group: None     Discovery Data Source: None

Sami Ruohonen report/s the discovery of a new astronomical transient.

IAU Designation: AT 2017ket
Coordinates (J2000): RA = 17:18:23.736 (259.5989) DEC = +33:17:35.16 (33.2931)
Discovery date: 2017-04-03 12:01:08.000 (JD=2457847.000787)

Potential host galaxy: WISEA J171823.97+331732.8
Host redshift: 0.075482

Remarks: This transient was first observed by Sami Ruohonen in the Legacy Survey Sky Viewer and discussed on the Galaxy Zoo website here: https://www.zooniverse.org/projects/zookeeper/galaxy-zoo/talk/1269/1203627.

Photometry

Discovery (first detection):
Discovery date: 2017-04-03 12:01:08.000
Flux: 19.69 ABMag
Filter: z-Sloan
Instrument: DECAM
Telescope: CTIO - 4-m Victor M. Blanco Telescope

Remarks: The z-band Apparent magnitude was calculated by Ine Theunissen using APT and reference star: SDSS J171830.44+331640.4 http://skyserver.sdss.org/dr14/en/tools/explore/Summary.aspx?id=1237671936044958103. The z-band Absolute magnitude of -17.91 was also calculated.

Last non-detection:
Archival info: SDSS

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