TNS Astronomical Transient Report No. 255690 [ 2025TNSTR1872....1P ]

Date Received (UTC): 2025-05-21 20:31:01
Date made public:
Sender: Ismael Perez-Fournon
Reporting Group: SGLF     Discovery Data Source: ZTF

I. Pérez-Fournon (IAC and ULL), D. Cano-Morales, I. Correa-Plasencia, A.E. Hernández-Díaz, C. Jaén-Martín (ULL), F. Poidevin (IAC and ULL), C. Jiménez Ángel (GRANTECAN), Z. Delgado-González (ULL), R. Shirley (MPE), R. Marques-Chaves (Univ. of Geneva), and S. Geier (GRANTECAN & IAC) on behalf of SGLF report/s the discovery of a new astronomical transient.

IAU Designation: AT 2025kys
Discoverer internal name: ZTF25aaqxeqi
Coordinates (J2000): RA = 09:54:30.604 (148.627517) DEC = +08:24:07.76 (8.402156)
Discovery date: 2025-05-21 05:28:58.000 (JD=2460816.7284491)

Potential host galaxy: SDSS J095430.64+082409.1

Remarks: SN candidate discovered using the public ZTF alerts, the LSST/ZTF brokers, and atlas our SGLF filters. ZTF light curve available at the LSST/ZTF brokers, e.g.: https://lasair-ztf.lsst.ac.uk/objects/ZTF25aaqxeqi/ https://alerce.online/object/ZTF25aaqxeqi https://antares.noirlab.edu/loci/ANT2025tn3zs7hwyqle https://fink-portal.org/ZTF25aaqxeqi

Photometry

Discovery (first detection):
Discovery date: 2025-05-21 05:28:58.000
Flux: 18.983 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Last non-detection:
Last non-detection date: 2025-05-15 05:25:42
Limiting flux: 19.841 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin


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