ADC/CDS Standard Document for Catalog:
/journal_tables/A+AS/122/515/

1. Use the ADC Data Viewer Suite to visualize the data.
2. Get the data files via anonymous FTP. (See Note.)

J/A+AS/122/515      HL Aur light curves and minima (Zhang+ 1997)
================================================================================
HL Aurigae: A near-contact binary system
       Zhang R.X., Fang M.J., Zhai D.S.
      <Astron. Astrophys. Suppl. Ser. 122, 515 (1997)>
      =1997A&AS..122..515Z      (SIMBAD/NED BibCode)
================================================================================
ADC_Keywords: Binaries, eclipsing ; Ephemerides
Keywords: stars: HL Aur - binaries: eclipsing

Abstract:
    Photoelectric observations of HL Aur were carried out with the 60cm
    reflector of Beijing Astronomical Observatory in 1990 and 1994, and
    the first photoelectric BV light curves were obtained along with a
    newly derived ephemeris. The period of the system appears to be
    constant over the past 65-years. Using the Wilson-Devinney program a
    photometric analysis of the B and V light curves is performed. It is
    evident that HL Aur is a near-contact binary with a mass ratio of
    q=m_2_/m_1_=0.722+/-0.011. The primary component of the system is
    essentially in contact with its Roche lobe, while the secondary is
    detached but nearly in contact with its lobe. It is found that the
    components of the system are slightly evolved and located near the
    terminal-age main sequence. The binary is consistent with the general
    evolutionary picture for near-contact systems.

Objects:
    ----------------------------------------------------------
        RA (2000) DE       Designation(s)
    ----------------------------------------------------------
     06 19 08  +49 42.7    HL Aur
    ----------------------------------------------------------

File Summary:
--------------------------------------------------------------------------------
  FileName      Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe             80        .   This file
table3a            21      129   V magnitude differences of HL Aur
table3b            21      122   B magnitude differences of HL Aur
table5             61       48   Times of minima of HL Aur
--------------------------------------------------------------------------------

Byte-by-byte Description of file: table3a table3b
--------------------------------------------------------------------------------
   Bytes Format Units   Label     Explanations
--------------------------------------------------------------------------------
   1- 12  F12.4 d       HJD       Heliocentric Julian date
  14- 20  F7.4  mag     Dmag      Differential magnitude
--------------------------------------------------------------------------------

Byte-by-byte Description of file: table5
--------------------------------------------------------------------------------
   Bytes Format Units   Label     Explanations
--------------------------------------------------------------------------------
   1- 12  F12.4 d       HJD       Heliocentric Julian date
  14- 21  F8.1  ---     E         Integer eclipse cycle number
  23- 29  F7.4  ---     O-C       Observed - Compiled residual
  31- 32  I2    ---     W         Weigth (1)
  34- 61  A28   ---     Ref       Reference (2)
--------------------------------------------------------------------------------
Note (1): 1: visual observation
          2: photographic observation
          5: time of minimum derived from somewhat incomplete observations
         10: photoelectric observation
Note (2): Fernandes, 1983BAVSM..36....1F
          Frank, 1983BAVSM..36....1F
          Gray and Samec, 1995IBVS.4235....1G
          Kippenhahn, 1955AN....282...73K
          Locher, 1976BBSAG..21....1L
          Moschner and Kleikamp, 1989BAVSM..52....1M
          Moschner and Kleikamp, 1990BAVSM..56....1M
          Pfau, 1955MitVS.198....1P and 1955MitVS.199....1P
          Quester, 1978BAVSM..29....1Q
          Tsesevitch, 1956ACiCh.174....1T
--------------------------------------------------------------------------------
================================================================================
(End)                                         Patricia Bauer [CDS]   03-Dec-1996