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A log N(HI) = 22.6 DLA in a dark gamma-ray burst: the environment of GRB 050401
D. Watson, J. P. U. Fynbo, C. Ledoux +33
The optical afterglow spectrum of GRB050401 (at z=2.8992+/-0.0004) shows the presence of a DLA, with log(nHI)=22.6+/-0.3. This is the highest column density ever observed in a DLA,…
Photopolarimetric observations of the new eclipsing polar CTCV J1928-5001
Stephen B. Potter, Thomas Augusteijn, Claus Tappert
We report photopolarimetric observations of a new eclipsing polar (AM Herculis system) discovered in the Calan-Tololo survey. The photometry and polarimetry are modulated on a peri…
A Survey of Eclipsing Binary Stars in the Eastern Spiral Arm of M31
Ian Todd, Don Pollacco, Ian Skillen +3
Results of an archival survey are presented using B-band imaging of the eastern spiral arm of M31. Focusing on the eclipsing binary star population, a matched-filter technique has…
Multiwavelength Observations of 3C 66A during the WEBT campaign of 2003 - 2004
M. Boettcher, J. Harvey, M. Joshi
The BL Lac object 3C 66A was the target of an extensive multiwavelength monitoring campaign from July 2003 through April 2004, involving observations throughout the electromagnetic…
Identification of 13 DB + dM and 2 DC + dM binaries from the Sloan Digital Sky Survey
E. J. M. van den Besselaar, G. H. A. Roelofs, G. A. Nelemans +2
We present the identification of 13 DB + dM binaries and 2 DC + dM binaries from the Sloan Digital Sky Survey (SDSS). Before the SDSS only 2 DB + dM binaries and 1 DC + dM binary w…