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J/A+A/289/871       YY Eri & AE Phe                            (Maceroni+, 1994)
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Period variations of the late type contact binaries YY Eri and AE Phe: how to
use light curves outside minimum
     Maceroni C., van't Veer F.
    <Astron. Astrophys. 289, 871 (1994)>
    =1994A&A...289..871M    (SIMBAD/NED Reference)
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ADC_Keywords: Binaries, spectroscopic; Photometry, UBV
Keywords: binaries: close - stars: YY Eri, AE Phe - methods: data analysis

Abstract:
    We present and compare minimum times, computed for light curves of the W 
    Uma type binaries YY Eri and AE Phe. Two different methods are used: the 
    Leiden method formulated by Kwee & van Woerden and the light curve 
    synthesis method developed by Wilson & Devinney. It is shown that the 
    latter gives more and better information, and is even capable to extract 
    the times of conjunction. Its application requires a complete analysis of 
    the parameters of the system, including the surface inhomogeneities. The 
    observations are available in electronic form.

File Summary:
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 FileName    Lrecl    Records    Explanations
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ReadMe          80          .    This file
aephe           37       1091    Johnson UBV observations of AE Phe
yyeri           37        556    Johnson BV observations of YY Eri
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Byte-by-byte Description of file: aephe, yyeri
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   Bytes Format  Units  Label Explanations
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   2- 13  F12.4  d      HJD   Heliocentric Julian day
  16- 20  F5.3   mag    U     []? U differential magnitude (variable-comparison)
  23- 28  F6.3   mag    B     []? B differential magnitude (variable-comparison)
  32- 37  F6.3   mag    V     []? V differential magnitude (variable-comparison)
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(End)                                           Patricia Bauer [CDS] 06-May-1994