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 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matter to analyze a previously unpublished, extensive linear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:
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RA (2000) DE Designation(s)
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00 10 42.1 +54 53 29 SX Cas = HD 232121
00 12 11.3 +55 06 22 BD+54 11 = HD 232133
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 48 3853 Polarimetric observations of SX Cas
table3.dat 60 603 Photometric observations of SX Cas
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See also:
J/A+AS/102/343 : UBVRI polarization of RS CVn-type binaries (Scaltriti+ 1993)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d JD [2444867/2446001] Julian Date
16 A1 --- Filter [UBVRI] Filter
19- 24 F6.3 % q [-1.3/2.6] Normalized Stokes parameter q(%)
27- 32 F6.3 % u [-1.6/2.5] Normalized Stokes parameter u(%)
36- 40 F5.3 % Error1 [0/1.1] Error estimate from photon statistics
44- 48 F5.3 % Error2 [0/1.8] Error estimate from least-squares fit
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d JD [2444867/2446001] 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
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Note (1): UBVRI photometry of SX Cas relative to the comparison star BD+54 0011
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Acknowledgements: Vilppu Piirola, piirola(at)utu.fi
(End) Vilppu Piirola [Tuorla observatory], Patricia Vannier [CDS] 13-Apr-2006