Spectroscopic Classifications of Optical Transients with Mayall/KOSMOS
ATel #8918; Y.-C. Pan, J. Miller, R. J. Foley (Illinois), S. W. Jha (Rutgers), A. Rest (STScI), D. Scolnic (Chicago/KICP)
on 6 Apr 2016; 18:32 UT
Credential Certification: Yen-Chen Pan (ycpan@illinois.edu)
Subjects: Optical, Supernovae, Transient
We report the following classifications of optical transients from spectroscopic observations with the KOSMOS on the Mayall telescope. Targets were supplied by the Pan-STARRS Survey for Transients (PSST). All observations were made on 2016 April 06 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
PS16bnr | 11:38:43.46 | +08:44:09.8 | 0.067 | | | 1
PS16bnz | 10:20:36.90 | -02:28:00.3 | 0.06 | Ia | -8d | 2
PS16bod | 11:15:08.11 | +22:03:35.8 | 0.26 | Ia | +4d |
Notes:
When the redshift is given to 2 decimal places, it is derived from the SN spectrum. Otherwise, the redshift is determined from the host galaxy.
(1) The spectrum has a blue continuum with no distinguishing features.
(2) The redshift derived from the SN spectrum is consistent with the redshifts of cluster galaxies in the SN vicinity, with PS16bnz being offset by 34 kpc from the closest spectroscopically confirmed cluster member. Cluster members have a range of redshifts from 0.0558 to 0.0627. For this range, we measure a Si II 6355 velocity of -11,700 to -13,700 km/s.
