J/MNRAS/421/2414 Faint cataclysmic variables from SDSS (Woudt+, 2012)
High-speed photometry of faint cataclysmic variables.
VII. Targets selected from the Sloan Digital Sky Survey and the
Catalina Real-time Transient Survey.
Woudt P.A., Warner B., De Bude D., Macfarlane S., Schurch M.P.E.,
Zietsman E.
<Mon. Not. R. Astron. Soc., 421, 2414-2429 (2012)>
=2012MNRAS.421.2414W 2012MNRAS.421.2414W
ADC_Keywords: Binaries, cataclysmic ; Photometry
Keywords: techniques: photometric - binaries: close - binaries: eclipsing -
stars: dwarf novae - novae, cataclysmic variables
Abstract:
We present high-speed photometric observations of 20 faint cataclysmic
variables (CVs) selected from the Sloan Digital Sky Survey (SDSS) and
Catalina catalogues. Measurements are given of 15 new directly
measured orbital periods, including four eclipsing dwarf novae
(SDSS 0904+03, CSS 0826-00, CSS 1404-10 and CSS 1626-12), two new
polars (CSS 0810+00 and CSS 1503-22) and two dwarf novae with
superhumps in quiescence (CSS 0322+02 and CSS 0826-00). Whilst most
of the dwarf novae presented here have periods below 2h, SDSS 0805+07
and SSS 0617-36 have relatively long orbital periods of 5.489 and
3.440h, respectively. The double-humped orbital modulations observed
in SSS 0221-26, CSS 0345-01, CSS 1300+11 and CSS 1443-17 are
typical of low-mass transfer rate dwarf novae. The white dwarf primary
of SDSS 0919+08 is confirmed to have non-radial oscillations, and
quasi-periodic oscillations were observed in the short-period dwarf
nova CSS 1028-08 during outburst. We further report the detection of
a new nova-like variable (SDSS 1519+06). The frequency distribution of
orbital periods of CVs in the Catalina Real-time Transient Survey
(CRTS) has a high peak near ∼80min orbital period, independently
confirming that found by Gansicke et al. (2009MNRAS.397.2170G 2009MNRAS.397.2170G) from
SDSS sources. We also observe a marked correlation between the median
in the orbital period distribution and the outburst class, in the
sense that dwarf novae with a single observed outburst (over the
5-year baseline of the CRTS coverage) occur predominantly at shortest
orbital period.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 67 20 List of studied stars
table1.dat 87 105 Observing log
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See also:
B/cb : Cataclysmic Binaries, LMXBs, and related objects (Ritter+, 2013)
J/AJ/134/185 : Cataclysmic variables from SDSS-DR5 (Szkody+, 2007)
J/AJ/142/181 : CVs from SDSS. VIII. The final year (Szkody+, 2011)
J/MNRAS/429/2143 : Hidden population of AM CVns in the SDSS (Carter+, 2013)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Object name
14- 15 I2 h RAh Simbad Right ascension (J2000)
17- 18 I2 min RAm Simbad Right ascension (J2000)
20- 24 F5.2 s RAs Simbad Right ascension (J2000)
26 A1 --- DE- Simbad Declination sign (J2000)
27- 28 I2 deg DEd Simbad Declination (J2000)
30- 31 I2 arcmin DEm Simbad Declination (J2000)
33- 36 F4.1 arcsec DEs Simbad Declination (J2000)
38- 67 A30 --- SName Simbad name
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Object name
14- 19 A6 --- OName Other name
21- 32 A12 --- Type Type (1)
34- 38 A5 --- Run Run number
40- 49 A10 "YYYY/MM/DD" Obs.Date Observation date (start of night)
51- 60 F10.5 d HJD HJD of first observation (HJD-2450000.0)
62- 65 F4.2 h Length Length of the observation
67- 69 I3 s Tin1 Integration time
70 A1 --- --- [,]
71- 73 I3 s Tin2 ? Second integration time
75- 76 I2 2.54cm Tel [40/74] Telescope size (inches)
78- 80 A3 --- --- [in.]
83- 86 F4.1 mag rmag r magnitude
87 A1 --- n_rmag [bcd] Note on rmag (2)
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Note (1): Type as follows:
DN = Dwarf nova
CV = Cataclysmic variable
Polar = magnetic cataclysmic variable
Note (2): Notes as follows:
b = mean magnitude out of eclipse
c = an uncertain value
d = observations taken with the SAAO CCD
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 28-Jan-2013