J/AJ/116/2549 HW Per UBV differential photometry (Samec+, 1998)
HW Persei: an eclipsing binary at critical contact?
Samec R.G., Carrigan B.J., McDermith R.J.
<Astron. J. 116, 2549 (1998)>
=1998AJ....116.2549S 1998AJ....116.2549S (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, spectroscopic ; Photometry, UBV
Keywords: binaries: close - binaries: eclipsing - stars: variables: general -
techniques: photometric
Abstract:
A complete photometric analysis for the eclipsing binary candidate HW
Persei is presented. The UBV observations were taken at Lowell
Observatory in 1996 January. Three epochs of minimum light were
determined, and an improved linear ephemeris was calculated. The O-C
residuals, spanning some 60 years, show no evidence of a period
change. Standard magnitudes are given, and reddening estimates are
made. The first published synthetic light curve solutions of HW Per
reveal that it is near a state of critical contact, which we define as
both components exactly filling their respective Roche lobes. The
primary component is of A8 spectral type, and the secondary component
is a K3-K4 spectral type. The nature of the model is discussed.
Objects:
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RA (2000) DE Designation(s)
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03 58 42.0 +44 43 18 HW Per
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 21 837 Standardized observations of HW Persei
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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 F12.4 d HJD Heliocentric Julian date
14 A1 --- band [UBV] Filter
16- 21 F6.4 mag Dmag Differential magnitude in Band filter
HW Per - Comparison star (1)
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Note (1): Comparison star: RA=03:58:51, DE=+44:36:37 (J2000.0)
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History: From AJ electronic version
(End) James Marcout, Patricia Bauer [CDS] 09-Mar-1999