J/AJ/147/130 Minimum times of 7 eclipsing systems (Zasche+, 2014)
The period analysis of V418 Aql, SU Boo, RV CVn, CR Cas, GV Cyg, V432 Per, and
BD+42 2782.
Zasche P., Wolf M., Uhlar R., Kucakova H.
<Astron. J., 147, 130 (2014)>
=2014AJ....147..130Z 2014AJ....147..130Z
ADC_Keywords: Binaries, eclipsing ; Photometry, CCD
Keywords: binaries: eclipsing - stars: fundamental parameters ;
stars: individual: (V418 Aql,SU Boo,RV CVn,CR Cas,GV Cyg,V432 Per,BD+42 2782)
Abstract:
The minimum timings of eclipsing binaries V418 Aql, SU Boo, RV CVn, CR
Cas, GV Cyg, V432 Per, and BD+42 2782 were collected and analyzed.
Their long-term behavior was studied via period analysis, revealing a
periodic term in eclipse times. We derived 576 new times of minimum.
Hence, to describe the periodic variation, a third-body hypothesis was
proposed and the resulting orbital periods are as follows: 70, 7.4,
53, 37, 27, 53, and 18 yr, respectively. For the system V432 Per an
additional 9.5 yr variation was also found. The predicted minimum
masses of these distant bodies were calculated and their detectability
discussed. The light curves of SU Boo and RV CVn were analyzed using
the PHOEBE program, resulting in physical parameters of the
components. New variable stars in the field of V418 Aql were
discovered.
Description:
New observations were mostly obtained at Ondrejov Observatory in the
Czech Republic, using the 65cm reflector equipped with the MI G2-3200
CCD camera. The only exception was the star BD+42 2782, which is too
bright for this telescope, and hence was observed by one of the
authors (R. Uhlar) with small 34mm and 200mm telescopes at a private
observatory in Jilove u Prahy in the Czech Republic.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 46 7 Eclipsing binaries
table4.dat 51 1016 The minimum times used for the analysis
refs.dat 172 118 References
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)
II/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+, 2002-2005)
J/AJ/146/101 : LINEAR. III. Catalog of periodic variables (Palaversa+, 2013)
J/AJ/146/21 : LINEAR. II. Catalog of RR Lyrae stars (Sesar+, 2013)
J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009)
J/AJ/133/255 : Light-curve and radial velocities of BD+42 2782 (Lu+, 2007)
J/A+AS/128/139 : ubvy photometry of CR Cas (Clement+ 1998)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Eclipsing system identifier
13- 14 I2 h RAh SIMBAD hour of Right Ascension (J2000)
16- 17 I2 min RAm SIMBAD minute of Right Ascension (J2000)
19- 23 F5.2 s RAs SIMBAD second of Right Ascension (J2000)
25 A1 --- DE- SIMBAD sign of the Declination (J2000)
26- 27 I2 deg DEd SIMBAD degree of Declination (J2000)
29- 30 I2 arcmin DEm SIMBAD arcminute of Declination (J2000)
32- 35 F4.1 arcsec DEs SIMBAD arcsecond of Declination (J2000)
37- 46 F10.8 d Per Period
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Eclipsing system identifier
13- 23 F11.5 d HJD Heliocentric Julian Date (HJD-2400000)
25- 31 F7.5 d e_HJD ? Error in HJD
33- 35 A3 --- Flt Filter used in the observation (1)
37- 40 A4 --- Type Minimum type (Prim=primary, or Sec=secondary)
42- 51 A10 --- Ref Reference; in refs.dat file
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Note (1):
C = clear (without any filter)
W = special filter of the WASP survey (Pollacco et al., 2006PASP..118.1407P 2006PASP..118.1407P);
L = special filter of the LINEAR survey (Sesar et al., 2011AJ....142..190S 2011AJ....142..190S;
2013, cat. J/AJ/146/21; Palaversa et al., 2013, cat. J/AJ/146/101).
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Ref Reference identifier
8- 26 A19 --- BibCode Bibliographic code
28- 49 A22 --- Aut Author's name
51-172 A122 --- Com Comments
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 24-Sep-2014