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J/A+A/454/277       UBVRI polarimetry of SX Cas              (Piirola+, 2006)
UBVRI polarimetry of the massive interacting binary SX Cas:
modeling the electron-scattering circumstellar envelope.
    Piirola V., Berdyugin A., Coyne G.V., Efimov Yu.S., Shakhovskoy N.M.
   <Astron. Astrophys. 454, 277 (2006)>
   =2006A&A...454..277P
ADC_Keywords: Binaries, eclipsing ; Polarization ; Photometry, UBVRI

Keywords: polarization - stars: binaries: eclipsing -
          accretion, accretion disks - stars: individual: SX Cas - plasmas -
          scattering

Abstract:
    We perform a study of the structure, density, and distribution of
    ionized circumstellar gas in the strongly interacting binary SX Cas.
    We apply our new model codes for electron scattering in circumstellar
    matter to analyze a previously unpublished, extensive linear
    polarization data set for SX Cas, collected during four successive
    observing periods in 1981-84 at the Crimean Astrophysical Observatory.
    These data are complemented by our polarization observations carried
    out in 2000 and 2005 with the KVA-60 telescope at La Palma.

Description:
    File table2 contains individual polarimetric observations of SX Cas
    File table3 contains individual photometric observations of SX Cas
Objects:
    -----------------------------------------------
       RA   (2000)   DE      Designation(s)
    -----------------------------------------------
    00 10 42.1   +54 53 29   SX Cas   = HD 232121
    00 12 11.3   +55 06 22   BD+54 11 = HD 232133
    -----------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        48     3853   Polarimetric observations of SX Cas
table3.dat        60      603   Photometric observations of SX Cas


See also:
  J/A+AS/102/343 : UBVRI polarization of RS CVn-type binaries (Scaltriti+ 1993)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1- 12  F12.4 d       JD        Julian Date
      16  I1    -       Filter    [1/5] Filters 12345 = UBVRI
  19- 24  F6.3  %       q         Normalized Stokes parameter q(%)
  27- 32  F6.3  %       u         Normalized Stokes parameter u(%)
  36- 40  F5.3  %       Error1    Error estimate from photon statistics
  44- 48  F5.3  %       Error2    Error estimate from least-squares fit


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

   Bytes Format Units   Label     Explanations

   1- 12  F12.4 d       JD        Julian Date
  15- 20  F6.3  mag     DUmag     Differential magnitude in the U band (1)
  23- 28  F6.3  mag     DBmag     Differential magnitude in the B band (1)
  31- 36  F6.3  mag     DVmag     Differential magnitude in the V band (1)
  39- 44  F6.3  mag     DRmag     Differential magnitude in the R band (1)
  47- 52  F6.3  mag     DImag     Differential magnitude in the I band (1)
  56- 60  F5.3  ---     Airm      Air mass

Note (1): UBVRI photometry of SX Cas relative to the comparison star BD+54 0011



Acknowledgements: Vilppu Piirola, piirola(at)utu.fi

(End)   Vilppu Piirola [Tuorla observatory], Patricia Vannier [CDS]  13-Apr-2006