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. =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 We apply our new model codes for electron scattering in circumstellar matter to analyze a previously unpublished, extensive linear polarization data set for SX Cas, collected during four successive observing periods in 1981-84 at the Crimean Astrophysical Observatory.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 [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 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 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