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Spectroscopic Classification of PSN J00563965-0954028 as a Type Ib supernova and ASASSN-14ma as a Type II supernova

ATel #6826; Y. Cao (Caltech), M. Kasliwal (Carnegie/Princeton), Y. AlSayyad (U Washington), S. R. Kulkarni (Caltech)
on 16 Dec 2014; 06:37 UT
Credential Certification: Yi Cao (ycao@astro.caltech.edu)

Subjects: Optical, Supernovae

We report spectroscopic observations of PSN J00563965-0954028 (discoverer: K. Itagaki, TOCP report) and ASASSN-14ma (ATel #6824) with the Dual Imaging Spectrograph mounted on the ARC-3.5m telescope at the Apache Point Observatory on 2014 Dec 16 UT.

The superfit program (Howell et al. 2005, ApJ, 634, 1190) finds that the spectrum of PSN J00563965-0954028 matches that of the Type Ib/c supernova SN1999ex a few days after peak and therefore determine the redshift of PSN J00563965-0954028 to be 0.02. We find no hydrogen line in the spectrum and also identify He I 5876, 6678 and 7065 absorption lines. The absorption minima correspond to an expansion velocity of 6000 km/s. Therefore, we classify PSN J00563965-0954028 as a Type Ib supernova at redshift 0.02.

The spectrum of ASASSN-14ma shows narrow emission that matches Hydrogen Balmer series at redshift 0.013. At this redshift, its ASASSN-14ma shows broad P-Cygni Balmer lines. The minimum of Halpha corresponds to an expansion velocity of 10000 km/s. Therefore, we classify ASASSN-14ma as a Type II supernova at redshift 0.013.

We congratulate Mr Itagaki for his 100th discovery of supernovae! We also thank S. Hawley for facilitating this ToO.