TNS Classification Report No. 18683 [ 2024TNSCR4486....1N ]

Date Received (UTC): 2024-11-13 17:27:29
Sender: Megan Newsome
Group: None

Megan Newsome (Las Cumbres), Iair Arcavi (TAU), Sara Faris, Joseph Farah, Moira Andrews, D. Andrew Howell, Curtis McCully report/s a classification of object: SN 2024aayl

Type: SN Ia
Redshift: 0.027426

Remarks: Using SNID (Blondin & Tonry 2007, ApJ, 666, 1024), we find best fits to SNe Ia near maximum light, including SN 2005hf 8 days before peak. The supernova is closest to CGCG 421-034 (z = 0.027426, 2000UZC...C......0F:, value from NED). Adopting this redshift we measure a Si II 6355 velocity of approximately 10,000 km/s. Adopting the distance modulus computed from this redshift (35.3), the g-band absolute magnitude of the object roughly coeval with the spectrum is -18.2 (apparent magnitude 17.1, from ZTF). This absolute magnitude and velocity is consistent with an SN Ia approaching maximum light.

The following Classification spectrum was provided:

Obsdate: 2024-11-13 13:52:32
Instrument: FLOYDS-S
Telescope: Faulkes Telescope South

Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2024aayl