Supernova 2011ji

Report the discovery of an apparent supernova in unfiltered Mount Lemmon Survey (MLS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. 2011ji Nov. 28.41 9 08 21.16 +16 33 37.1 18.5 Further MLS magnitudes for 2011ji: May 13.21 UT, [19.2; Dec. 24.47, 18.9. L. Tomasella, S. Valenti, S. Benetti, F. Bufano, M. Fiaschi, A. Pastorello, and P. Ochner, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, on behalf of a larger collaboration, report that a spectrogram of 2011ji, obtained on Dec. 24.02 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm; resolution 2.4 nm), suggests that 2011ji is a type-Ia supernova around one month after maximum. Using GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383; available at website URL https://gelato.tng.iac.es/login.cgi), the spectrum is found to be similar to that of SN 1999gp at 34 days past maximum. A narrow H_alpha feature is visible in the spectrum, fixing the redshift at z = 0.089. However, because of the poor resolution of the spectrum, it cannot be verified if H_alpha is circumstellar or due to a contaminating H II region....