Followup Observations of SDSS and CRTS Candidate Cataclysmic Variables

Abstract

We present photometry of 11 and spectroscopy of 35 potential cataclysmic variables from the Sloan Digital Sky Survey, the Catalina Real-Time Transient Survey and vsnet-alerts. The photometry results include quasi-periodic oscillations during the decline of V1363 Cyg, nightly accretion changes in the likely Polar (AM Herculis binary) SDSS J1344+20, eclipses in SDSS J2141+05 with an orbital period of 76+/-2 min, and possible eclipses in SDSS J2158+09 at an orbital period near 100 min. Time-resolved spectra reveal short orbital periods near 80 min for SDSS J0206+20, 85 min for SDSS J1502+33, and near 100 min for CSS J0015+26, RXS J0150+37, SDSS J1132+62, SDSS J2154+15 and SDSS J2158+09. The prominent HeII line and velocity amplitude of SDSS J2154+15 are consistent with a Polar nature for this object, while the lack of this line and a low velocity amplitude argue against this classification for RXS J0150+37. Single spectra of 10 objects were obtained near outburst and the rest near quiescence, confirming the dwarf novae nature of these objects.

arXiv comment34 pages, 14 figures, in press at AJ

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Cited by in corpus (14)

• Magnetic White Dwarfs
• Evidence for reduced magnetic braking in polars from binary population models
• Statistical properties of dwarf novae-type cataclysmic variables: The Outburst Catalogue
• A Trip to the Cataclysmic Binary Zoo: Detailed Follow-Up of 35 Recently-Discovered Systems
• Exploratory Spectroscopy of Magnetic Cataclysmic Variables Candidates and Other Variable Objects
• Spectroscopic properties of the dwarf nova-type cataclysmic variables observed by LAMOST
• The Palomar Transient Factory Sky2Night programme
• SDSS J134441.83+204408.3: A highly asynchronous, short-period magnetic cataclysmic variable with a 56 MG field strength
• Spectroscopic Studies of 30 Short-period Cataclysmic Variable Stars, and Remarks on the Evolution and Population of Similar Objects
• Followup Observations of SDSS and CRTS Candidate Cataclysmic Variables II
• Optical Studies of 8 AM Herculis-Type Cataclysmic Variable Stars
• High-speed photometry of faint cataclysmic variables - IX. Targets from multiple transient surveys
• The activity of the post-nova V1363 Cyg on long timescales
• Characterizing Some Gaia Alerts with LAMOST and SDSS