TNS Astronomical Transient Report No. 259048 [ 2025TNSTR2268....1S ]

Date Received (UTC): 2025-06-18 13:29:13
Date made public:
Sender: Krzysztof Stanek
Reporting Group: ASAS-SN     Discovery Data Source: ASAS-SN

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

IAU Designation: SN 2025nzh
Discoverer internal name: ASASSN-25co
Coordinates (J2000): RA = 03:27:39.888 (51.9162) DEC = -04:15:29.02 (-4.25806)
Discovery date: 2025-06-18 10:04:48.000 (JD=2460844.92)

Potential host galaxy: WISEA J032739.88-041530.5
Host redshift: 0.037609

Remarks: Likely supernova, present in several epochs, discovered after the seasonal break

Photometry

Discovery (first detection):
Discovery date: 2025-06-18 10:04:48.000
Flux: 15.8 ABMag
Filter: g-Sloan
Instrument: Cassius
Telescope: ASASSN-Cassius

Last non-detection:
Last non-detection date: 2025-03-09 00:00:00
Limiting flux: 17.3 ABMag
Filter: g-Sloan
Instrument: Cassius
Telescope: ASASSN-Cassius


Details of the new object can be viewed here: https://www.wis-tns.org/object/2025nzh