TNS Classification Report No. 18307 [ 2024TNSCR3794....1N ]

Date Received (UTC): 2024-09-30 20:47:19
Sender: Megan Newsome
Group: Global SN Project

Megan Newsome (LCO/UCSB), Moira Andrews (LCO/UCSB), Joseph Farah (LCO/UCSB), D. Andrew Howell (LCO/UCSB), Curtis McCully (LCO), report/s a classification of object: SN 2024wal

Type: SN Ia
Redshift: 0.053

Remarks: Using SNID (Blondin & Tonry 2007, ApJ, 666, 1024) we find best fits to SNe Ia prior to maximum light, including SN 1990O 6 days before peak and SN 2006cq 3 days before peak. The supernova is closest to WISEA J024259.43+115730. Adopting the SNID best-fit redshift of z=0.053 we measure a Si II 6355 velocity of approximately 10,000 km/s. Adopting the distance modulus computed from this redshift (36.9), the g-band absolute magnitude of the object roughly coeval with the spectrum is -19.1 (apparent magnitude 17.9). This absolute magnitude and velocity is consistent with an SN Ia approaching maximum light.

The following Classification spectrum was provided:

Obsdate: 2024-09-30 09:55:03
Instrument: FLOYDS-N
Telescope: Faulkes Telescope North

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