Access to Astronomical Catalogues

J/AJ/133/255     Light-curve and radial velocities of BD+42 2782     (Lu+, 2007)
Light-curve and radial velocity study of the contact binary BD +42 2782.
    Lu W., Hrivnak B.J., Rush B.W.
   <Astron. J., 133, 255-260 (2007)>
   =2007AJ....133..255L
ADC_Keywords: Binaries, eclipsing ; Photometry, RI ; Photometry, Cousins ;
              Radial velocities
Keywords: binaries: eclipsing - stars: individual (BD +42 2782)


Abstract:
    BD+42 2782 was recently discovered to be a variable star with a
    W UMa-type, eclipsing-binary light curve. We have obtained the first
    photoelectric light curves (RC, IC) and also the first radial velocity
    curves for this binary.

Description:
    Photoelectric observations of BD+42 2782 were made with the 0.4m,
    f/12 Cassegrain telescope at the Valparaiso University Observatory.
    Observations were carried out in two intervals, 2004 June 5-14 (four
    nights) and 2004 September 7 to November 7 (eight nights).
Objects:
    ----------------------------------------------------
       RA   (2000)   DE     Designation(s)
    ----------------------------------------------------
    17 01 22    +42 09.8    BD+42 2782 = TYC 3080-1410-1
    ----------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        39      453   Differential magnitudes for BD+42 2782 from 2004
table3.dat        33       18   Radial velocities for both components of BD+42 2782


See also:
  J/AJ/132/960  : V(RI)c light-curves of EQ Tauri (Hrivnak+, 2006)
  J/A+A/311/523 : Photometry of W UMa (Maceroni+, 1996)
  J/A+A/417/745 : V(RI)C differential photometry of V861 Her (Csizmadia+, 2004)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1- 12  F12.4 d       HJDRc     Heliocentric Julian Date
  14- 19  F6.3  mag     DRcmag    Differential Magnitude in Rc
  21- 32  F12.4 d       HJDIc     ? Heliocentric Julian Date
  34- 39  F6.3  mag     DIcmag    ? Differential Magnitude in Ic


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

   1- 12  F12.4 d       HJD       Heliocentric Julian Date
  14- 19  F6.4  ---     Phase     Phase
  21- 26  F6.1  km/s    Vp        ? Radial velocity of primary component
  28- 33  F6.1  km/s    Vs        ? Radial velocity of secondary component


History:
    From electronic version of the journal
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    11-Dec-2008