Spectroscopic Observations of the M31 UV Transient, TCP J00423876+4110453

Astronomy and Astrophysics – Astronomy

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Optical, Ultra-Violet, Nova, Transient

Scientific paper

We report spectroscopic observations of the UV transient TCP J00423876+4110453 discovered by Henze et al. (ATel #3712) with the Ultraviolet/Optical Telescope (UVOT) on board the Swift satellite. At our request, a spectrum (410-900 nm) was obtained by M. Shetrone on 2011 Oct. 31.32 UT with the 9.2m Hobby-Eberly Telescope (+ Marcario Low-Resolution Spectrograph). The spectrum reveals unresolved Balmer and weak He I (λ 501.6 nm; λ 706.5 nm) emission features (FWHM Hα < ~500 km/s; EW Hα ~ -14.0 nm) superimposed on a shallow blue continuum.

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