Spectroscopic classification of CSS140620:171007+610911 and CORRECTION of ATel #6263
ATel #6264; 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; 17:02 UT
Credential Certification: D. C. Leonard (leonard@astro.caltech.edu)
Subjects: Optical, Supernovae
[ATel #6263 inadvertently listed the incorrect object name (we observed CSS140620:171007+610911, not CSS140620:145423+013141) and observation date. The corrected text is below.]
We report spectroscopic observations and classification of CSS140620:171007+610911 through inspection of a low-dispersion optical spectrum (range 370-680 nm), obtained with the 2.3-m Bok telescope (+ Boller & Chivens spectrograph) at Steward Observatory on June 24 UT.
CSS140620:171007+610911 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 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.
