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• W2034309648 abstract "We report the discovery of an eclipsing cataclysmic variable with eclipse depths >5.7 mag, orbital period 94.657 minutes, and peak brightness V ∼ 18 at J2000 position 17h25m548, −64°38'39''. Detected by visual inspection of images from Yale University's QUEST camera on the European Southern Observatory 1.0 m Schmidt telescope at La Silla, we obtained light curves in B, V, R, I, z, and J with SMARTS 1.3 m and 1.0 m telescopes at Cerro Tololo and spectra from 3500 to 9000 Å with the SOAR 4.3 m telescope at Cerro Pachon. The optical light curves show a deep, 5-minute eclipse immediately followed by a shallow 38-minute eclipse and then sinusoidal variation. No eclipses appear in J. During the deep eclipse we measure V−J > 7.1, corresponding to a spectral type M8 or later secondary, consistent with the dynamical constraints. The estimated distance is 150 ps. The spectra show strong hydrogen emission lines, Doppler broadened by 600–1300 km s−1, oscillating with radial velocity that peaks at mid deep eclipse with semi-amplitude 500 ± 22 km s−1. We suggest that LSQ172554.8–643839 is a polar with a low-mass secondary viewed at high inclination. No known radio or X-ray source coincides with the new object's location." @default.
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• W2034309648 date "2011-04-14" @default.
• W2034309648 modified "2023-10-16" @default.
• W2034309648 title "DISCOVERY AND CHARACTERIZATION OF AN EXTREMELY DEEP-ECLIPSING CATACLYSMIC VARIABLE: LSQ172554.8-643839" @default.
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• W2034309648 doi "https://doi.org/10.1088/0004-637x/732/1/51" @default.
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