Spectroscopic classification of HFF14Jan as a Type Ia supernova
ATel #6774; R. J. Foley (Illinois), O. Graur (NYU/AMNH), S. A. Rodney (JHU), L.-G. Strolger (STScI), A. Molino (IAG-USP), P. L. Kelly (UC Berkeley), and the FrontierSN and GLASS Teams
on 1 Dec 2014; 14:54 UT
Credential Certification: Ryan Foley (rfoley@illinois.edu)
Subjects: Optical, Supernovae
We report the spectral classification of HFF14Jan, discovered by the Frontier
Fields Supernova Search (HST PID: 13790) using the Hubble Space Telescope
in the field of Abell 370 (z=0.375). A spectrum (range 460-965 nm) was
obtained on November 27 UT with the Gemini-North (+GMOS-N) telescope.
HFF14Jan is a Type Ia supernova similar to the "high-luminosity"
SNe 1991T and 1999aa approximately 5 days before maximum brightness at
a redshift of z = 0.305 (as measured from narrow galactic emission
lines). This places HFF14Jan clearly in the foreground of the cluster,
consistent with photo-z estimates. HFF14Jan has a Si II 635.5 nm line
velocity of -10,200 km/s. Identification was assisted by
cross-correlation with a library of supernova spectra using the
"SuperNova IDentification" code (SNID; Blondin & Tonry 2007, ApJ, 666,
1024).
