TNS Astronomical Transient Report No. 260518 [ 2025TNSTR2463....1S ]

Date Received (UTC): 2025-06-29 13:22:46
Date made public:
Sender: Krzysztof Stanek
Reporting Group: ASAS-SN     Discovery Data Source: ASAS-SN

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

IAU Designation: AT 2025phs
Discoverer internal name: ASASSN-25cv
Coordinates (J2000): RA = 23:12:45.967 (348.19153) DEC = -53:34:32.12 (-53.57559)
Discovery date: 2025-06-27 05:45:36.000 (JD=2460853.74)

Potential host galaxy: WISEA J231246.13-533433.5
Host redshift: 0.046472

Remarks: Present in several epochs, on the rise. Nuclear transient, so could also be a TDE.

Photometry

Discovery (first detection):
Discovery date: 2025-06-27 05:45:36.000
Flux: 17.1 ABMag
Filter: g-Sloan
Instrument: Paczynski
Telescope: ASASSN-Paczynski

Last non-detection:
Last non-detection date: 2025-06-20 06:00:00
Limiting flux: 18.5 ABMag
Filter: g-Sloan
Instrument: Paczynski
Telescope: ASASSN-Paczynski


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