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J/A+A/507/929   Light curves of SDSS J100658.40+233724.4  (Southworth+, 2009)

Orbital periods of cataclysmic variables identified by the SDSS. VI. The 4.5-hr period eclipsing system SDSS J100658.40+233724. Southworth J., Hickman R.D.G., Marsh T.R., Rebassa-Mansergas A., Gansicke B.T., Copperwheat C.M., Rodriguez-Gil P. <Astron. Astrophys. 507, 929 (2009)> =2009A&A...507..929S
ADC_Keywords: Binaries, cataclysmic ; Photometry, CCD ; Spectroscopy Keywords: stars: dwarf novae - stars: novae, cataclysmic variables - stars: binaries: eclipsing - stars: binaries: spectroscopic - stars: white dwarfs - stars: individual: SDSS J100658.40+233724 Abstract: We present time-resolved spectroscopy and photometry of SDSS J100658.40+233724.4, which we have discovered to be an eclipsing cataclysmic variable with an orbital period of 0.18591324 days (267.71507min). The observed velocity amplitude of the secondary star is 276±7km/s, which an irradiation correction reduces to 258±12km/s. Doppler tomography of emission lines from the infrared calcium triplet supports this measurement. We have modelled the light curve using the LCURVE code and Markov Chain Monte Carlo simulations, finding a mass ratio of 0.51±0.08. From the velocity amplitude and the light curve analysis we find the mass of the white dwarf to be 0.78±0.12M and the masses and radii of the secondary star to be 0.40±0.10M and 0.466±0.036R, respectively. The secondary component is less dense than a normal main sequence star but its properties are in good agreement with the expected values for a CV of this orbital period. By modelling the spectral energy distribution of the system we find a distance of 676±40pc and estimate a white dwarf effective temperature of 16500±2000K. Description: We present the discovery and follow-up observations of eclipses of the cataclysmic variable star SDSS J100658.40+233724.4, fom which we determine the orbital period and the masses and radii of the two stellar components. Time-resolved optical spectroscopic observations covering the full orbital period were obtained on three consecutive nights. Time-resolved photometry of four eclipses was obtained between 2008 February and December. Objects: --------------------------------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------------------------------- 10 06 58.4 +23 37 24 SDSS J100658.40+233724.4 = SDSS J100658.41+233724.4 --------------------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file caha.dat 29 784 White-light photometry from Calar Alto 2.2m not.dat 29 559 Wide-V-filter photometry from the NOT 2.5m obs.dat 34 157 Spectroscopic observations sp/* 0 157 FITS files of red and blue spectra
See also: http://www.sdss.org : SDSS Home Page J/MNRAS/373/687 : Spectra of 5 faint cataclysmic variables (Southworth+, 2006) Byte-by-byte Description of file: caha.dat not.dat
Bytes Format Units Label Explanations
1- 14 F14.6 d HJD Heliocentric Julian Date of exposure midpoint 17- 22 F6.3 mag mag Apparent magnitude of SDSS J100658.40+233724.4 25- 29 F5.3 mag e_mag Measurement error in apparent magnitude
Byte-by-byte Description of file: obs.dat
Bytes Format Units Label Explanations
1- 17 F17.9 d HJD Heliocentric Julian Date of observation 19- 22 A4 --- Band [red blue] Red or blue 24- 34 A11 --- FileName Name of the fits file in sp subdirectory
Acknowledgements: John Southworth, jkt(at)astro.keele.ac.uk References: Southworth et al., Paper I 2006MNRAS.373..687S, Cat. J/MNRAS/373/687 Southworth et al., Paper II 2007MNRAS.382.1145S Dillon et al., Paper III 2008MNRAS.386.1568D Southworth et al., Paper IV 2008MNRAS.388..709S Southworth et al., Paper V 2008MNRAS.391..591S
(End) John Southworth [Warwick, UK], Patricia Vannier [CDS] 18-Sep-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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