CCD time-resolved photometry of faint cataclysmic variables. II

Details CCD time-resolved photometry of faint cataclysmic variables. II CCD time-resolved photometry of faint cataclysmic variables. II

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pasp..101..899s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 101, Oct. 1989, p. 899-906. Research supported by the L

Astronomy and Astrophysics

Astronomy

54

Astronomical Photometry, Cataclysmic Variables, Faint Objects, Light Curve, Charge Coupled Devices, Stellar Orbits, Stellar Rotation, Temporal Resolution, Visible Spectrum

Scientific paper

Time-resolved optical broad-band light curves obtained from differential photometry on sequential CCD frames of the known or suspected cataclysmic variable FO And, EH Aqr, WX Cet, XX Cet, AL Com, V503 Cyg, AH Eri, CP Eri, IR Gem, RW UMi, PG0134+070, and US 3215 are presented. The analysis of the light curves with coverage of greater than 2 hrs shows repeatable periodicity in five objects. PG0134+070 exhibits eclipses of 1.3-1.8 mag depth with a period of 313 min. V503 Cyg has a 0.7-1.0 mag peak-to-peak modulation with a period of 109 min. IR Gem shows a large modulation at the orbital period of 99 min, and comparison with previous data indicates that this modulation may have an amplitude dependent on outburst phase. AH Eri reveals a 0.1-0.3 mag modulation, at a period of 42 min. Better time-resolved data on AL Com confirm the 0.4-mag variation reported by Howell and Szkody (1988) at a period of 42 min. These latter two short periods likely indicate magnetic systems. There is also some evidence of periodicity in RW UMi and WX Cet which must be confirmed with further data.

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