TNS Classification Report No. 21081 [ 2025TNSCR1882....1I ]

Date Received (UTC): 2025-05-21 10:43:36
Sender: Antonio Martin-Carrillo
Group: None

L. Izzo (INAF/OACN and DARK/NBI), A. Martin-Carrillo (UCD), Z. P. Zhu (NAOC), D. B. Malesani (DAWN/NBI and Radboud), B. P. Gompertz (U. Birmingham), G. Corcoran (UCD), N. R. Tanvir (Leicester), R. Rautio (Univ. Oulu) report/s a classification of object: SN 2025kmd

Type: SN Ia
Redshift: 0.169

Remarks: Using SNID, the spectrum matches well several normal rising type-Ia supernovae at z = 0.18 +/- 0.01, 7 days before peak. The slit in our observation was oriented to cover as well the bright galaxy 5.3” NW of this source. We detect several emission lines which we identify Halpha, Hbeta, [O III] and [O II] at a common redshift of z = 0.169. With a 15 kpc projected separation, this galaxy is thus a plausible host of AT 2025kmd/GOTO25cqo.

The following Classification spectrum was provided:

Obsdate: 2025-05-16 23:44:29
Instrument: ALFOSC
Telescope: Nordic Optical Telescope

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