Classification of PSN J05421980-2532399 as a pre-max Type Ia SN with WiFeS
ATel #5777; M. Childress, R. Scalzo, F. Yuan, B. Schmidt (Australian National University), B. Tucker (Australian National University and University of California Bekerley)
on 19 Jan 2014; 07:19 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Michael Childress (mjc@mso.anu.edu.au)
Subjects: Optical, Supernovae
We report spectroscopic classification of PSN J05421980-2532399 with the Wide Field Spectrograph (WiFeS - Dopita et al., 2007, ApSS, 310, 255) on the ANU 2.3m telescope at Siding Spring Observatory, NSW Australia, using the B3000/R3000 gratings (3500-9800 A, 1 A resolution). PSN J05421980-2532399 was discovered by Parker on 2014 Jan 17.52 at mag 17.0 in PGC 17633. An 80 minute spectrum of the SN on 2014 Jan 18.56 shows this object to be a type Ia supernova a few days before maximum light. Typical SN Ia features are present such as Si 6355, Ca H/K and the IR triplet, the sulfur "W", and Fe complexes in the 4000-5000 AA region. Classification with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) shows good matches to SNe Ia a few days before maximum light (best match is to SN 1996ai at -1 days) at a redshift of around z=0.031, consistent with redshift of the apparent host galaxy PGC 17633 (= ESO 487-G36, z=0.030014 - Wegner et al., 1999, MNRAS, 305, 259). Adopting the redshift of the apparent host galaxy, we measure a Si 6355 absorption minimum at v=11,000 km/s, as well as apparent high velocity features in the Ca IR triplet at v=20,000 km/s (see Childress, Filippenko, Ganeshalingam, & Schmidt, 2014, MNRAS, 437, 338).
Name | RA (J2000) | Dec (J2000) | Disc. Date | Disc. Source | Disc Mag | z | Type | Phase | Notes
PSN J05421980-2532399 | 05 42 19.80 | -25 32 39.9 | 20140117 | Parker | 17.0 | 0.030 | Ia | -1 |
