Discovery certificate for object 2017key
TNS Astronomical Transient Report No. 75400 [ 2020TNSTR1965....1T ]

Date Received (UTC): 2020-06-28 21:17:59
Sender: Ms. Ine Theunissen
Reporting Group: None     Discovery Data Source: None

Ine Theunissen-Limpens report/s the discovery of a new astronomical transient.

IAU Designation: AT 2017key
Coordinates (J2000): RA = 15:31:16.896 (232.8204) DEC = +31:33:22.32 (31.5562)
Discovery date: 2017-03-20 11:26:09.000 (JD=2457832.9764931)

Potential host galaxy: SDSS J153117.33+313321.0
Host redshift: 0.132533

Remarks: This transient was first discovered by Ine Theunissen on the Galaxy Zoo Mobile website here: https://www.zooniverse.org/projects/mikewalmsley/galaxy-zoo-mobile/talk/subjects/42353851.

Photometry

Discovery (first detection):
Discovery date: 2017-03-20 11:26:09.000
Flux: 19.78 ABMag
Filter: R-Cousins
Instrument: DECAM
Telescope: CTIO - 4-m Victor M. Blanco Telescope

Remarks: The r-band Apparent magnitude was taken from the DECaLS DR7 catalog. The r-band Absolute magnitude of -19.07 was calculated by Ine Theunissen.

Last non-detection:
Archival info: SDSS

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