TNS Astronomical Transient Report No. 124446 [ 2021TNSTR3318....1S ]

Date Received (UTC): 2021-09-27 22:32:39
Date made public:
Sender: Krzysztof Stanek
Reporting Group: ASAS-SN     Discovery Data Source: ASAS-SN

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

IAU Designation: SN 2021zsw
Discoverer internal name: ASASSN-21sd
Coordinates (J2000): RA = 23:09:44.153 (347.43397) DEC = -72:00:01.22 (-72.00034)
Discovery date: 2021-09-26 06:57:36.000 (JD=2459483.79)

Potential host galaxy: ESO 077-IG 004
Host redshift: 0.028917

Remarks: Present in several epochs, possible nuclear source, so could also be a TDE

Photometry

Discovery (first detection):
Discovery date: 2021-09-26 06:57:36.000
Flux: 16.5 ABMag
Filter: g-Sloan
Instrument: Cassius
Telescope: ASASSN-Cassius

Last non-detection:
Last non-detection date: 2021-09-24 01:26:24
Limiting flux: 17.1 ABMag
Filter: g-Sloan
Instrument: Paczynski
Telescope: ASASSN-Paczynski


Details of the new object can be viewed here: https://www.wis-tns.org/object/2021zsw