Discovery certificate for object 2018btn
TNS Astronomical Transient Report No. 18668 [ 2018TNSTR.667....1S ]

Date Received (UTC): 2018-05-19 00:19:00
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 2018btn
Discoverer internal name: ASASSN-18ko
Coordinates (J2000): RA = 13:33:36.420 (203.40175) DEC = -33:12:25.34 (-33.20704)
Discovery date: 2018-05-17 22:04:48 (JD=2458256.42)

Potential host galaxy: 2MASX J13333656-3312251
Host redshift: 0.048617

Remarks: In several epochs

Photometry

Discovery (first detection):
Discovery date: 2018-05-17 22:04:48
Flux: 18 ABMag
Filter: g-Sloan
Instrument: Payne-Gaposchkin
Telescope: ASASSN-Payne-Gaposchkin

Last non-detection:
Last non-detection date: 2018-05-13 22:19:12
Limiting flux: 18.6 ABMag
Filter: g-Sloan
Instrument: Payne-Gaposchkin
Telescope: ASASSN-Payne-Gaposchkin


Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2018btn