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.
