[ Previous | Next | ADS ]

Spectroscopic Classification of Three PSST Transients

ATel #8949; P. Blanchard, M. Nicholl, E. Berger (Harvard/CfA), W. Fong (Arizona), R. Chornock (Ohio University)
on 14 Apr 2016; 01:15 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Peter Blanchard (pblanchard@cfa.harvard.edu)

Subjects: Optical, Supernovae, Transient

We obtained spectroscopic observations on 2016 April 6 UT (range 3000-10600 Angstroms) of three transients reported by the Pan-STARRS Survey for Transients (PSST; Huber et al., ATel #7153; http://star.pst.qub.ac.uk/ps1threepi/ ) using IMACS mounted on the 6.5m Magellan/Baade Telescope. The classifications, shown below, were performed using SNID (Blondin & Tonry, 2007, ApJ, 666, 1024). The redshifts listed below are inferred from the best fitting SNID templates.

PSST Name | RA (J2000) | DEC (J2000) | Disc. Date | Disc. Source | Disc. Mag | z | Type | Sp. Phase | Notes
PS16bnq | 11:34:27.58 | +11:41:55.0 | 20160313 | CRTS | 18.0 | 0.02 | SN II | ~5-10 d | (1)
PS16bbl | 13:46:13.03 | -18:27:27.8 | 20160113 | LSQ | 18.5 | 0.05 | SN II | ~20-50 d | (2)
PS16bau | 15:20:53.19 | -26:11:24.3 | 20160311 | PSST | 19.2 | 0.07 | SN Ia | ~40 d | (3)

(1) PS16bnq is also known as CSS160313-113428+114155 and is located 4.5" away from extended source SDSS J113427.87+114153.7. The spectrum is noisy but shows a clear broad feature matching H-alpha at z ~ 0.02.

(2) PS16bbl is also known as LSQ16jq and CSS160402-134613-182728. The PSST lightcurve shows a fairly steep (0.02 mag/day) decline rate, making this object likely a Type II-L.

(3) PS16bau is also known as AT2016bbb and is located 2.1" away from an uncatalogued source that is possibly a compact host galaxy.