On the Nature of Unconfirmed Supernovae
L. S. Aramyan, A. R. Petrosian, A. A. Hakobyan, G. A. Mamon, D. Kunth,, M. Turatto, V. Zh. Adibekyan, T. A. Nazaryan
TL;DR
This study investigates 39 unconfirmed supernovae from SDSS DR8, confirming 21 as real supernovae, classifying some as probable types, and clarifying their host galaxies and coordinates.
Contribution
It provides a detailed re-evaluation and classification of previously unconfirmed supernovae using SDSS data and literature review.
Findings
21 supernovae confirmed as real
4 supernovae are probable, with 3 likely type Ia and 1 probable type II
Host galaxy of SN 1976N identified and coordinates corrected
Abstract
We study the nature of 39 unconfirmed supernovae (SNe) from the sky area covered by the Sloan Digital Sky Survey (SDSS) Data Release 8 (DR8), using available photometric and imaging data and intensive literature search. We confirm that 21 objects are real SNe, 2 are Galactic stars, 4 are probable SNe, and 12 remain unconfirmed events. The probable types for 4 objects are suggested: 3 SNe are of probable type Ia, and SN 1953H is probable type II SN. In addition, we identify the host galaxy of SN 1976N and correct the offsets/coordinates of SNe 1958E, 1972F, and 1976N.
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