Spectroscopic classification of OGLE-2013-SN-001 and OGLE-2013-SN-002
ATel #4721; J. L. Prieto (Princeton), L. Wyrzykowski, A. Udalski, S. Kozlowski, I. Soszynski (Warsaw University Astronomical Observatory, Poland)
on 9 Jan 2013; 23:37 UT
Credential Certification: Jose L. Prieto (jose@obs.carnegiescience.edu)
Subjects: Optical, Supernovae, Transient
We report optical spectroscopy of OGLE-2013-SN-001 and
OGLE-2013-SN-002 discovered by the OGLE-IV transient
survey (Wyrzykowski et al., ATeL #4718). The spectra
(range 370-930nm; res. 0.7nm) were obtained on Jan. 8.1
with WFCCD mounted on the du Pont 2.5-m telescope at
Las Campanas Observatory. OGLE-2013-SN-001 is
a Type Ia supernova at maximum light. Cross correlation
with a library of SN spectra using SNID (Blondin & Tonry
2007, ApJ, 1024, 666) shows good matches with spectra of
normal SN Ia at maximum light (the best matching template
is SN 1998bu at +1 days). The redshift derived by SNID
is z=0.09. The spectrum of OGLE-2013-SN-002 shows a
blue continuum with nebular emission lines from the
host galaxy at redshift z=0.0722. This is probably a
young Type II SN, still rising to peak. Its current
observed magnitude (I=18.52, ATeL #4718) and distance
modulus of the host (mu = 37.5) implies an absolute mag
MI = -19.
