TNS Classification Report No. 20639 [ 2025TNSCR1159....1S ]

Date Received (UTC): 2025-03-26 13:58:41
Sender: Maximilian Stritzinger
Group: NUTS2

M. Stritzinger (Aarhus), C. Gutiérrez (Barcelona), Pastorello (Padua), S. Bose (Aarhus), M. Fraser (Dublin) C. R. Burns (Carnegie), X. Huangfei (FSU), Y.E. Hsiao (FSU), C. Ashall (Hawaii), N. Morrell (Las Campanas) report/s a classification of object: AT 2025fsm

Type: Gap
Redshift: 0.015

Remarks: The spectrum is consistent with certain gap transients and/or Type IIn supernovae. The current absolute magnitude is approximately -14.5 mag, with the light curve exhibiting a gradual increase in flux. The quoted redshift of 0.015 is derived from SNID (Blondin & Tonry 2007, ApJ, 666, 1024) and aligns with the redshift value of 0.015474 reported by NED for the host-galaxy NGC 5434 .

The following Classification spectrum was provided:

Obsdate: 2025-03-26 04:02:15
Instrument: ALFOSC
Telescope: Nordic Optical Telescope

Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2025fsm