Classification of PSN J13505285-3017097 as an old Type Ia SN with WiFeS
ATel #5161; M. Childress, R. Scalzo, B. Tucker, F. Yuan, B. Schmidt (Australian National University), A. Klotz , E. Conseil (Institute of Research in Astrophysics and Planetology)
on 25 Jun 2013; 01:14 UT
Credential Certification: Michael Childress (mjc@mso.anu.edu.au)
Subjects: Optical, Supernovae
We report spectroscopic classification of PSN J13505285-3017097 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 J13505285-3017097 was discovered by Conseil on 2013 May 02.22 at mag 18.4 on TAROT images, and photometric follow up shows the light curve peaks in brightness at mag 16 on 2013 May 15. A 40 minute spectrum of the SN on 2013 June 22.38 shows clear signatures of an old type Ia supernova, including strong Fe absorption features around 5000 AA, absence of the Si II 6355 feature due to nearby Fe features, and absorption in the Ca II infrared triplet. Classification with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) shows good match to SN 2008bf at +39 days, which is consistent with the light curve phase. Mean redshift from SNID is about 0.022 +- 0.006, consistent with the redshift of the apparent host galaxy ESO 445- G 056 (z=0.018953 - Kuntschner et al., 2002, MNRAS, 337, 172 - via NED).
Name | RA (J2000) | Dec (J2000) | Disc. Date | Disc. Source | Disc Mag | z | Type | Phase | Notes
PSN J13505285-3017097 | 13 50 52.85 | -30 17 09.7 | 20130502 | Conseil | 18.4 | 0.022 | Ia | +39 |
