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Erratum: The redshift of CSS100313:112547-084941

ATel #2508; A. A. Mahabal, A. J. Drake
on 24 Mar 2010; 23:14 UT
Credential Certification: Andrew J. Drake (ajd@cacr.caltech.edu)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 3343, 4498

Following Quimby et al. (ATel#2492), we undertook further investigation of the Palomar 5m spectra of CSS100313:112547-084941 taken on Mar 15th. We find that the galaxy detected at z=0.17 is unrelated to the supernova. Furthermore, we marginally detect the presence of emission lines consistent with OIII and OII at a redshift of z=0.23, in agreement with Quimby et al. and Pastorello et al. (ATel#2504). However, we do not detect the presence of Halpha emission or MgII absorption.

The first CRTS detection of CSS100313:112547-084941 was at 13.32UT. The discovery was automatically processed and openly distributed as a VOEvent via VOEventNet at 13.34UT. The transient was human-classified as a likely supernova in a CRTS Circular that was openly announced over SkyAlert on Mar 13.41 UT. The SN was also detected by CRTS on Mar 15.31 UT. For details see the SkyAlert event