M 31 center on prediscovery Swift UVOT UVW2 images (original) (raw)

Abstract

We confirm an optical nova candidate, designated PNV J00424629+4113517 by the optical discoverers K. Nishiyama and F. Kabashima (Miyaki-Argenteus Observatory, Japan), as a bright source on three Swift UVOT UVW2 filter prediscovery images (central wavelength 192.8 nm, FWHM 65.7 nm) with about 815 s exposure (ObsID 00032702015) starting on 2013 Feb. 22.070, 22.137, and 22.204 UT with brightness increasing from magnitude 16.88± 0.05, 16.70± 0.05, to 16.41± 0.04, respectively.

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