92 citations · 227 across the 5 of their papers we have counts for
11 papers · 1 filter
Infrared Excess in the Be Star Delta Scorpii
R. J. Halonen, C. E. Jones, T. A. A. Sigut +6
We present infrared photometric observations of the Be binary system delta Scorpii obtained in 2006. The J,H and K magnitudes are the same within the errors compared to observation…
Parallax and Luminosity Measurements of an L Subdwarf
Adam J. Burgasser, Frederick J. Vrba, Sébastien Lépine +5
We present the first parallax and luminosity measurements for an L subdwarf, the sdL7 2MASS J05325346+8246465. Observations conducted over three years by the USNO infrared astromet…
Measuring Night-Sky Brightness with a Wide-Field CCD Camera
D. M. Duriscoe, C. B. Luginbuhl, C. A. Moore
We describe a system for rapidly measuring the brightness of the night sky using a mosaic of CCD images obtained with a low-cost automated system. The portable system produces mill…
Trigonometric Parallaxes of Central Stars of Planetary Nebulae
Hugh C. Harris, Conard C. Dahn, Blaise Canzian +11
Trigonometric parallaxes of 16 nearby planetary nebulae are presented, including reduced errors for seven objects with previous initial results and results for six new objects. The…
A near-infrared survey of the N49 region around the Soft Gamma-Ray Repeater 0526-66
S. Klose, A. A. Henden, U. Geppert +7
We report the results of a deep near-infrared survey with VLT/ISAAC of the environment of the supernova remnant N49 in the Large Magellanic Cloud, which contains the soft gamma-ray…
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…