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Superhumps in Cataclysmic Binaries. XXIV. Twenty More Dwarf Novae
J. Patterson, J. Thorstensen, J. Kemp +23
We report precise measures of the orbital and superhump period in twenty more dwarf novae. For ten stars, we report new and confirmed spectroscopic periods - signifying the orbital…
Parallax and Distance Estimates for Fourteen Cataclysmic Variable Stars
J. R. Thorstensen
I used the 2.4 m Hiltner telescope at MDM Observatory in an attempt to measure trigonometric parallaxes for 14 cataclysmic variable stars. Techniques are described in detail. In th…
Serendipitous Discovery and Parallax of a Nearby L Dwarf
J. R. Thorstensen, J. D. Kirkpatrick
A field star serendipitously observed in a parallax program proved to have a proper motion of 562 mas/yr and a parallax of 82 +- 2 mas. The star is identified with 2MASS J07003664+…
GRB 021004: A Possible Shell Nebula around a Wolf-Rayet Star Gamma-Ray Burst Progenitor
N. Mirabal, J. P. Halpern, Ryan Chornock +7
The rapid localization of GRB 021004 by the HETE-2 satellite allowed nearly continuous monitoring of its early optical afterglow decay, as well as high-quality optical spectra that…