| Galex and Optical Observations of GW Librae during the Long Decline from Superoutburst |
Mar 2011 |
12 pages |
| Authors:
Eric Bullock; Paula Szkody; Anjum S Mukadam; Bernardo W Borges; Luciano Fraga; Boris T Gansicke; Thomas E Harrison; Arne Henden; Jon Holtzman; Steve B Howell; WASHINGTON UNIV SEATTLE DEPT OF ASTRONOMY
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 | The prototype of accreting, pulsating white dwarfs (GW Lib) underwent a large amplitude dwarf nova outburst in 2007. We used ultraviolet data from Galaxy Evolution Explorer and ground-based optical photometry and spectroscopy to follow GW Lib for three years following this outburst. Several variations are apparent during this interval. The optical shows a superhump modulation in the months following outburst, while a 19 minute quasi-periodic modulation lasting for several months ... |
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| V3885 Sagittarius: A Comparison With a Range of Standard Model Accretion Disks |
01 Oct 2009 |
13 pages |
| Authors:
Albert P Linnell; Patrick Godon; Ivan Hubeny; Edward M Sion; Paula Szkody; Paul E Barrett; WASHINGTON UNIV SEATTLE DEPT OF ASTRONOMY
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| A chi-squared analysis of standard model accretion disk synthetic spectrum fits to combined Far Ultraviolet Spectroscopic Explorer and Space Telescope Imaging Spectrograph spectra of V3885 Sagittarius, on an absolute flux basis, selects a model that accurately represents the observed spectral energy distribution. Calculation of the synthetic spectrum requires the following system parameters. The cataclysmic variable secondary star period-mass relation calibrated by Knigge in 2006 and 2007 sets the secondary component ... |
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| Synthetic Spectrum Constraints on a Model of the Cataclysmic Variable QU Carinae |
Jan-2008 |
15 pages |
| Authors:
Albert P Linnell; Patrick Godon; Ivan Hubeny; Edward M Sion; Paula Szkody; Paul E Barrett; WASHINGTON UNIV SEATTLE DEPT OF ASTRONOMY
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| Neither standard model SEDs nor truncated standard model SEDs fit observed spectra of QU Carinae with acceptable accuracy over the range 900-3000 angstroms. Nonstandard model SEDs fit the observation set accurately. The nonstandard accretion disk models have a hot region extending from the white dwarf to R = 1:36R(sub WD), a narrow intermediate-temperature annulus, and an isothermal remainder to the tidal cutoff boundary. The models include a range of values ... |
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| Large Synoptic Survey Telescope: From Science Drivers to Reference Design |
Jan-2008 |
14 pages |
| Authors:
Z Ivezic; S M Kahn; J P Kantor; V Krabbendam; R H Lupton; D G Monet; P A Pinto; A Saha; T L Schalk; R L Jones; S H Jacoby; T Axelrod; W N Brandt; D L Burke; C F Claver; A Connolly; K H Cook; P Gee; D K Gillmore; D P Schneider; WASHINGTON UNIV SEATTLE DEPT OF ASTRONOMY
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| In the history of astronomy, major advances have come from dramatic improvements in our ability to accurately measure astronomical quantities. Aided by rapid progress in information technology, current sky surveys are changing the way we view and study the Universe. We focus here on the most ambitious survey currently planned in the visible band, the Large Synoptic Survey Telescope (LSST). LSST will have unique survey capability in the faint time ... |
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| Astrometry With Digital Sky Surveys: From SDSS to LSST |
Oct-2007 |
8 pages |
| Authors:
Z Ivezic; P Pinto; A J Tyson; G R Knapp; J E Gunn; R H Lupton; J A Munn; B Sesar; M Juric; N Bond; D G Monet; K Cook; WASHINGTON UNIV SEATTLE DEPT OF ASTRONOMY
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| Major advances in our understanding of the Universe have historically come from dramatic improvements in our ability to accurately measure astronomical quantities. The astrometric observations obtained by modern digital sky surveys are enabling unprecedentedly massive and robust studies of the kinematics of the Milky Way. For example, the astrometric data from the Sloan Digital Sky Survey (SDSS), together with half a century old astrometry from the Palomar Observatory Sky Survey ... |
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