DAO spectroscopic classification of ASASSN-15aj as a type-Ia supernova
ATel #7510; Balam, D. D., Dominion Astrophysical Observatory and Graham, M. L., LCOGT (UCSB)
on 15 May 2015; 21:20 UT
Credential Certification: David D. Balam (cosmos@uvic.ca)
Subjects: Optical, Supernovae
A spectrum was obtained of the possible supernova in 2MASX J11200680+3407396 with the 1.82-m Plaskett telescope (National Research Council of Canada) on UT 2015 May 15.25, covering the range 365-720 nm (resolution 0.35 nm). Cross-correlation with a template library using SNID (Blondin & Tonry 2007, ApJ, 666, 1024) shows ASASSN-15aj to be a normal type-Ia supernova a few days past maximum light. We find a good fit to SN 2002er at 2 days post-maximum. Adopting the host galaxy redshift z=0.03566 (NED) yields an expansion velocity for the Si II (rest 635.5 nm) feature of 10,980 km/s.
