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M 31 center on prediscovery Swift UVOT UVW2 images

ATel #4833; W. Pietsch, F. Hofmann (Max Planck Institut f. extraterr. Physik Garching MPE, Germany)
on 22 Feb 2013; 16:10 UT
Credential Certification: Wolfgang Pietsch (wnp@mpe.mpg.de)

Subjects: Ultra-Violet, Nova

Referred to by ATel #: 4988, 5099

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. The new Swift object is located at R.A. = 0h42m46s.37, Decl. = +41o13'50".6 (J2000).

The following magnitude upper limits were obtained with Swift UVOT:

ObsID 00032702011, filter UVW2, starting 2013 Feb. 18.45 UT, [20.4
ObsID 00032702014, filter U, starting 2013 Feb. 21.32 UT, [19.8

All magnitudes are on the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627). Magnitudes have not been corrected for extinction.

We would like to thank the Swift Team for making these observations possible, in particular N. Gehrels, the duty scientists as well as the science planners.