TNS Classification Report No. 8239 [ 2020TNSCR3823....1B ]
Date Received (UTC): 2020-12-17 19:53:32 Sender: Jamison Burke
Group: Global SN Project
Jamison Burke (LCO/UCSB), Yael Dgani (TAU), Iair Arcavi, Daichi Hiramatsu (LCO/UCSB), D. Andrew Howell, Curtis McCully, Estefania Padilla Gonzalez, Craig Pellegrino report/s a classification of object: SN 2020abfd
Type: SN IaRedshift: 0.045
Remarks: Using Superfit (Howell et al. 2005, ApJ, 634, 1190) and SNID (Blondin & Tonry 2007, ApJ, 666, 1024), we find best fits to SNe Ia ~10 days after maximum light, including the peculiar SN 2007if 10 days after peak. This phase is consistent with the ZTF lightcurve. The supernova is closest to WISEA J014746.49-214540.3, and we measure a redshift of approximately 0.045 based on narrow host galaxy lines present in the spectrum. Adopting this redshift we measure a Si II 6355 velocity of approximately 9000 km/s. Adopting the distance modulus computed from this redshift (36.5), the r-band absolute magnitude of the object roughly coeval with the spectrum is -18.1 (apparent magnitude 18.4).
The following Classification spectrum was provided:
Obsdate: 2020-12-15 05:57:56
Instrument: FLOYDS-N
Telescope: Faulkes Telescope North
Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2020abfd
Date Received (UTC): 2020-12-17 19:53:32 Sender: Jamison Burke
Group: Global SN Project
Jamison Burke (LCO/UCSB), Yael Dgani (TAU), Iair Arcavi, Daichi Hiramatsu (LCO/UCSB), D. Andrew Howell, Curtis McCully, Estefania Padilla Gonzalez, Craig Pellegrino report/s a classification of object: SN 2020abfd
Type: SN IaRedshift: 0.045
Remarks: Using Superfit (Howell et al. 2005, ApJ, 634, 1190) and SNID (Blondin & Tonry 2007, ApJ, 666, 1024), we find best fits to SNe Ia ~10 days after maximum light, including the peculiar SN 2007if 10 days after peak. This phase is consistent with the ZTF lightcurve. The supernova is closest to WISEA J014746.49-214540.3, and we measure a redshift of approximately 0.045 based on narrow host galaxy lines present in the spectrum. Adopting this redshift we measure a Si II 6355 velocity of approximately 9000 km/s. Adopting the distance modulus computed from this redshift (36.5), the r-band absolute magnitude of the object roughly coeval with the spectrum is -18.1 (apparent magnitude 18.4).
The following Classification spectrum was provided:
Obsdate: 2020-12-15 05:57:56
Instrument: FLOYDS-N
Telescope: Faulkes Telescope North
Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2020abfd