Spectroscopic classifications of ASASSN-14co and PSN J01505845+2159598
ATel #6255; D. C. Leonard (San Diego State University), K. Follette, P. Sheehan, and D. McCarthy (University of Arizona), S. Hart (Carnegie Mellon University), J. Moustakas (Siena College), A. Beverage, C. Burns, W. Chavez, A. Fox, E. Glad, M. Gregg, Z. Griffin, J. Griggs, K. Hart, A. Holt, E. Hooper, A. Horning, L. Hou, N. Irvin, J. Keane, S. Kinman, T. Lee, C. Lewis, C. Lindsay, S. Lipstone, C. Martino, T. McMaken, B. Nelson, L. Neumann, S. Pirkl, S. Pruitt, A. Schlingman, W. Schlingman, W. M. Schlingman, E. Schwartzman, N. Stock, J. Tinker, K. Van Artsdalen, T. Waddell, L. Westerlund, J. Wilke, L. Wiser (2014 Advanced Teen Astronomy Camp)
on 20 Jun 2014; 23:21 UT
Credential Certification: D. C. Leonard (leonard@astro.caltech.edu)
Subjects: Optical, Supernovae, Transient
We report spectroscopic observations and classifications of PSN J01505845+2159598 (CBAT TOCP) and ASASSN-14co (ATel 6245) through inspection of low-dispersion optical spectra (range 370-680 nm), obtained with the 2.3-m Bok telescope (+ Boller & Chivens spectrograph) at Steward Observatory on June 20 UT.
PSN J01505845+2159598 is a Type II supernova, exhibiting well-developed P-Cyg lines typical of the class during the photospheric phase. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) finds best matches with a number of normal type-IIP supernovae somewhat older than a month after maximum light. Adopting for the host galaxy (NGC 694) a radial velocity of 2950 km/s (De Vaucouleurs et al. 1991, RC3.9, via NED), an expansion velocity of 6000 km/s is derived from the position of the H_beta (rest 486.1 nm) minimum.
ASASSN-14co is a post-maximum Type Ia supernova, with SNID finding good matches with normal type-Ia events roughly 10 days after maximum light. Adopting for the host galaxy (PGC 56486) a radial velocity of 9995 km/s (Falco et al. 1999, via NED), an expansion velocity of 11400 km/s is derived from the position of the Si-II (rest 635.5 nm) minimum.
