J/A+A/420/1039 2001-2003 BV differential photometry of SW Lac (Albayrak+, 2004)
Modeling the Changing Spot Features of SW Lacertae: A Three Year Study.
Albayrak B., Djurasevic G., Erkapic S., Tanriverdi T.
<Astron. Astrophys. 420, 1039 (2004)>
=2004A&A...420.1039A 2004A&A...420.1039A
ADC_Keywords: Binaries, eclipsing ; Photometry, UBV
Keywords: stars: binaries: eclipsing - binaries: close - individual: SW Lac
Abstract:
In the present study, the activity of the eclipsing binary of the
W UMa-type system SW Lac is examined by analysing the new BV
photoelectric observations obtained in 2001, 2002 and 2003 at the
Ankara University Observatory. During this period, the seasonal light
curves show significant differences and asymmetries. A simultaneous
analysis of the light curves is made using Djurasevic's
inverse-problem method.
Description:
The BV observations of SW Lac were carried out on two nights
(Oct. 5 and 12) in 2001, one night (Oct. 18) in 2002, and two nights
(Oct. 3 and 22) in 2003 at the Ankara University Observatory, using an
uncooled SSP-5A photometer attached to a 30-cm Maksutov telescope. The
stars BD+37 4715 and BD+37 4711 were used as comparison and check stars,
respectively.
Objects:
---------------------------------------------
RA (2000) DE Designation(s)
---------------------------------------------
22 53 41.6 +37 56 18 SW Lac
22 53 11.7 +37 47 14 BD+37 4715 (comp.)
22 51 49.7 +38 03 52 BD+37 4711 (check)
---------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
obs2001.dat 45 234 Photoelectric Observations Obtained in 2001
season for SW Lac
obs2002.dat 52 180 Photoelectric Observations Obtained in 2002
season for SW Lac
obs2003.dat 52 404 Photoelectric Observations Obtained in 2003
season for SW Lac
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Byte-by-byte Description of file: obs2001.dat obs2002.dat obs2003.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
15- 20 F6.4 --- Phase Orbital phase
24- 29 F6.4 mag DBmag DeltaB magnitude
33- 38 F6.4 mag DVmag DeltaV magnitude
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Acknowledgements: Berahitdin Albayrak
(End) Patricia Bauer [CDS] 13-Apr-2004