Discovery certificate for object 2017jef
TNS Astronomical Transient Report No. 15538 [ 2017TNSTR1473....1S ]

Date Received (UTC): 2017-12-26 18:12:59
Sender: Prof. Krzysztof Stanek
Source Group: ASAS-SN

K. Z. Stanek, for the ASAS-SN team report/s the discovery of a new astronomical transient.

IAU Designation: SN 2017jef
Discoverer internal name: ASASSN-17rm
Coordinates (J2000): RA = 15:05:21.038 (226.33766) DEC = +12:47:03.52 (12.78431)
Discovery date: 2017-12-26 15:21:36 (JD=2458114.14)

Potential host galaxy: 2MASX J15052096+1247036
Host redshift: 0.02894

Remarks: First observation in this filter after a seasonal break

Photometry

Discovery (first detection):
Discovery date: 2017-12-26 15:21:36
Flux: 16.8 VegaMag
Filter: V-Johnson
Instrument: Brutus
Telescope: ASASSN-Brutus

Last non-detection:
Last non-detection date: 2017-08-30 23:31:12
Limiting flux: 17.5 VegaMag
Filter: B-Johnson
Instrument: Cassius
Telescope: ASASSN-Cassius


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