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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 (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: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 03 58 42.0 +44 43 18 HW Per ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 21 837 Standardized observations of HW Persei
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
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)
Note (1): Comparison star: RA=03:58:51, DE=+44:36:37 (J2000.0)
History: From AJ electronic version
(End) James Marcout, Patricia Bauer [CDS] 09-Mar-1999
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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