iPTF discovery of a young Type Ia supernova: iPTF16auf
ATel #9049; T. Petrushevska, R. Ferretti, C. Fremling, L. Hangard, E. Karamehmetoglu, A. Nyholm, S. Papadogiannakis, R. Roy, F. Taddia (OKC), I. Bar, A. Horesh, J. Johansson, S. Knezevic, G. Leloudas, I. Manulis, G. Nir, A. Rubin, M. Soumagnac, P. Vreeswijk, O. Yaron (Weizmann), Y. Cao (Caltech), I. Arcavi (LCOGT), on behalf of the intermediate Palomar Transient Factory
on 13 May 2016; 23:17 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Francesco Taddia (ftadd@astro.su.se)
Subjects: Optical, Supernovae, Transient
We report the detection of a young supernova, designated as iPTF16auf, at RA=14:31:09.26 and Dec=+27:14:09.8 (J2000), in the vicinity of the star forming galaxy MRK 685 at spectroscopic redshift 0.015. The supernova
was found at g=18.03+/-0.06 mag (absolute magnitude -16.0) on May 13.35 (UTC). It was not detected down to g>21 on May 10 or earlier.
Upon discovery, we triggered Gemini-N to obtain an optical spectrum with GMOS starting on
May 13.47. The spectrum shows absorption from Si II, S II and Fe II, indicating that
iPTF16auf is a young Type Ia supernova. The velocity corresponding to the minimum of Si II 6335
is 19000 km/s.
Other follow-up observations, including Swift, LCOGT and NOT, have been triggered. Additional follow-up
at all wavelengths is highly encouraged.
