Orbital periods of cataclysmic variables identified by the SDSS. III. Time-series photometry obtained during the 2004/5 International Time Project on La Palma

Abstract

We present time resolved CCD photometry of 15 cataclysmic variables (CVs) identified by the Sloan Digital Sky Survey (SDSS). The data were obtained as part of the 2004/05 International Time Programme on La Palma. We discuss the morphology of the light curves and the CV subtypes and give accurate orbital periods for 11 systems. Nine systems are found below the 2-3h orbital period gap, of which five have periods within a few minutes of the ~80min minimum orbital period. One system each is found within and above the gap. This confirms the previously noted trend for a large fraction of short-period systems among the SDSS CVs. Objects of particular interest are SDSSJ0901+4809 and SDSSJ1250+6655 which are deeply eclipsing. SDSSJ0854+3905 is a polar with an extremely modulated light curve, which is likely due to a mixture of cyclotron beaming and eclipses of the accretion region by the white dwarf. One out of five systems with white-dwarf dominated optical spectra exhibits non-radial pulsations.

Accepted for publication in MNRAS, 12 pages, 2 figures

References in corpus (17)

• Post Common Envelope Binaries from SDSS. I: 101 white dwarf main sequence binaries with multiple SDSS spectroscopy
• A brown dwarf mass donor in an accreting binary
• Mapping the ZZ Ceti Instability Strip: Discovery of 6 New Pulsators
• Pulsational Instabilities in Accreting White Dwarfs
• VLT/FORS spectroscopy of faint cataclysmic variables discovered by the Sloan Digital Sky Survey
• The influence of selection effects on the observed cataclysmic variable population: modelling and application to the Palomar-Green sample
• HS2237+8154: On the onset of mass transfer or entering the period gap?
• ULTRACAM observations of SDSS J170213.26+322954.1 - an eclipsing cataclysmic variable in the period gap
• Two Additions to the New Class of Low Accretion-Rate Magnetic Binaries
• Dwarf novae in the Hamburg Quasar Survey: Rarer than expected
• Orbital periods of cataclysmic variables identified by the SDSS. II. Measurements for six objects, including two eclipsing systems
• Discovery of two new accreting pulsating white dwarf stars
• SDSS J233325.92+152222.1 and the evolution of intermediate polars
• HST and Optical Observations of Three Pulsating Accreting White Dwarfs in Cataclysmic Variables
• Time-resolved observations of the short period CV SDSS J123813.73-033933.0
• New Pulsating White Dwarfs in Cataclysmic Variables
• Superhump periods in the UGSU-type dwarf nova SDSSp J082409.73+493124.4

Cited by in corpus (32)

• SDSS unveils a population of intrinsically faint cataclysmic variables at the minimum orbital period
• On the evolutionary status of short period cataclysmic variables
• Accretion disc atmospheres and winds in low-mass X-ray binaries
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. II: The Second Year (2009-2010)
• The evolutionary status of Cataclysmic Variables: Eclipse modelling of 15 systems
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011-2012)
• Evidence for reduced magnetic braking in polars from binary population models
• A catalogue of cataclysmic variables from 20 years of the Sloan Digital Sky Survey with new classifications, periods, trends and oddities
• The supergiant optical counterpart of ULX P13 in NGC7793
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. V: The Fifth Year (2012-2013)
• X-ray Luminosities of Optically-Selected Cataclysmic Variables and Application to the Galactic Ridge X-ray Emission
• An ultracompact X-ray binary in the globular cluster NGC 1851
• High speed photometry of faint Cataclysmic Variables - VII. Targets selected from the Sloan Digital Sky Survey and the Catalina Real-time Transient Survey
• Hunting For Eclipses: High Speed Observations of Cataclysmic Variables
• Orbital periods of cataclysmic variables identified by the SDSS. VI. The 4.5-hr period eclipsing system SDSS J100658.40+233724.4
• Orbital periods of cataclysmic variables identified by the SDSS. V. VLT, NTT and Magellan observations of nine equatorial systems
• Multi-site Observations of Pulsation in the Accreting White Dwarf SDSS J161033.64-010223.3 (V386 Ser)
• Spectroscopic Orbital Periods for 29 Cataclysmic Variables from the Sloan Digital Sky Survey
• Orbital periods of cataclysmic variables identified by the SDSS. VII. Four new eclipsing systems
• Orbital periods of cataclysmic variables identified by the SDSS. IX. NTT photometry of eight eclipsing and three magnetic systems
• A search for thermally emitting isolated neutron stars in the 2XMMp catalogue
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. X: The Tenth Year (2017)
• Orbital periods of cataclysmic variables identified by the SDSS. IV. SDSS J220553.98+115553.7 has stopped pulsating
• R-mode oscillations in accreting white dwarfs in cataclysmic variables
• Characterization of Dwarf Novae Using SDSS Colors
• Spectroscopic Studies of 30 Short-period Cataclysmic Variable Stars, and Remarks on the Evolution and Population of Similar Objects
• Multiwavelength observations of V479 Andromedae: a close compact binary with an identity crisis
• Cataclysmic Variables in the SUPERBLINK Proper Motion Survey
• Orbital periods of cataclysmic variables identified by the SDSS. VIII. A slingshot prominence in SDSS J003941.06+005427.5?
• Optical spectroscopy of the Be/black hole binary MWC656 -- interaction of a black hole with a circumstellar disc
• Observations of Faint Eclipsing Cataclysmic Variables
• The fainter the better: cataclysmic variable stars from the SDSS