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XMM-Newton detection of a transient X-ray source in the vicinity of V838 Monocerotis
Fabio Antonini, Rodolfo Jr. Montez, Joel H. Kastner +5
We report the XMM-Newton/EPIC detection in 2008 March of a luminous (L_X ~ 10^32-33 erg/s), variable X-ray source in the vicinity (within ~6") of the enigmatic star V838 Mon, which…
Astrometry with the Hubble Space Telescope: Trigonometric Parallaxes of Planetary Nebula Nuclei: NGC 6853, NGC 7293, Abell 31, and DeHt 5
G. Fritz Benedict, Barbara E. McArthur, Ralf Napiwotzki +6
We present absolute parallaxes and relative proper motions for the central stars of the planetary nebulae NGC 6853 (The Dumbbell), NGC 7293 (The Helix), Abell 31, and DeHt 5. This…
The 2008 Luminous Optical Transient in the Nearby Galaxy NGC 300
Howard E. Bond, Luigi R. Bedin, Alceste Z. Bonanos +4
A luminous optical transient (OT) that appeared in NGC 300 in early 2008 had a maximum brightness, M_V ~ -12 to -13, intermediate between classical novae and supernovae. We present…