TNS Astronomical Transient Report No. 256911 [ 2025TNSTR1987....1S ]

Date Received (UTC): 2025-05-27 12:42:20
Date made public:
Sender: Fritz
Reporting Group: ZTF     Discovery Data Source: ZTF

Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF report/s the discovery of a new astronomical transient.

IAU Designation: AT 2025mcs
Discoverer internal name: ZTF18aawkdyg
Coordinates (J2000): RA = 18:13:15.627 (273.3151116) DEC = +66:46:53.87 (66.7816315)
Discovery date: 2025-05-21 08:16:41.001 (JD=2460816.844919)



Photometry

Discovery (first detection):
Discovery date: 2025-05-21 08:16:41.001
Flux: 19.8175 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Last non-detection:
Last non-detection date: 2025-05-16 10:56:15
Limiting flux: 19.885 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/2025mcs