Classification of PS15ahs as a Type Ia Supernova
ATel #7477; A. S. Piascik, I. A. Steele (Liverpool JMU)
on 6 May 2015; 09:19 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Iain Steele (iainsteele@mac.com)
Subjects: Optical, Supernovae
We conducted a spectroscopic observation of transient PS15ahs (Atel #7471) at 2015-05-06T00:57:23 UT. One spectrum was obtained in the visible (400-800nm) with resolution R~350 using the SPRAT spectrograph on the Liverpool Telescope located at Roque de los Muchachos.
Classification using SNID (Blondin & Tonry 2007, ApJ, 666, 1024) indicates it is a type Ia SN with a close match to SN2002cr and estimated phase -11 days before maximum. The SiII expansion velocity is estimated at 14300 km/s assuming the object is associated with the nearest galaxy, MCG +07-37-011, which has a redshift, z = 0.031 +/- 0.007.
Liverpool Telescope