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Discovery and Evolution of an Unusual Luminous Variable Star in NGC 3432 (Supernova 2000ch)
R. M. Wagner, F. J. Vrba, A. A. Henden +15
We present photometric and spectroscopic observations of SN 2000ch, an unusual and extremely luminous variable star located in the galaxy NGC 3432. The object was discovered on 200…
L' and M' Photometry of Ultracool Dwarfs
D. A. Golimowski, S. K. Leggett, M. S. Marley +16
We have compiled L' and M' photometry of 63 single and binary M, L,and T dwarfs obtained at UKIRT using the MKO filter set. This compilation includes new L' data for 8 L dwarfs and…
Preliminary Parallaxes of 40 L and T Dwarfs from the U.S. Naval Observatory Infrared Astrometry Program
F. J. Vrba, A. A. Henden, C. B. Luginbuhl +12
We present preliminary trigonometric parallaxes and proper motions for 22 L dwarfs and 18 T dwarfs measured using the ASTROCAM infrared imager. Relative to absolute parallax correc…