Spectroscopic classification of CSS140620:145423+013141
ATel #6263; 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, J. Vince, T. Waddell, L. Westerlund, J. Wilke, L. Wiser (2014 Advanced Teen Astronomy Camp)
on 24 Jun 2014; 14:11 UT
Credential Certification: D. C. Leonard (leonard@astro.caltech.edu)
Subjects: Optical, Supernovae, Transient
Referred to by ATel #: 6264
We report spectroscopic observations and classification of CSS140620:145423+013141 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.
CSS140620:145423+013141 is a Type Ia supernova; 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-Ia supernovae at redshift of 0.085 a few days before maximum light. An expansion velocity of 11700 km/s is derived from the position of the Si-II (rest 635.5 nm) minimum.