TNS Astronomical Transient Report No. 264238 [ 2025TNSTR2965....1S ]

Date Received (UTC): 2025-07-29 13:41:48
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: AT 2025soo
Discoverer internal name: ASASSN-25dg
Coordinates (J2000): RA = 15:33:21.725 (233.34052) DEC = +04:28:21.79 (4.47272)
Discovery date: 2025-07-29 06:14:24.000 (JD=2460885.76)

Potential host galaxy: CGCG 050-024
Host redshift: 0.036505

Remarks: Present in several epochs, on the rise; nuclear source, so could also be a TDE

Photometry

Discovery (first detection):
Discovery date: 2025-07-29 06:14:24.000
Flux: 17.7 ABMag
Filter: g-Sloan
Instrument: Brutus
Telescope: ASASSN-Brutus

Last non-detection:
Last non-detection date: 2025-07-23 06:28:48
Limiting flux: 18.6 ABMag
Filter: g-Sloan
Instrument: Brutus
Telescope: ASASSN-Brutus


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