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J/A+A/385/55 Long-Term Polarization of BL Lac (Hagen-Thorn+ 2002)
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Analysis of the long-term polarization behaviour of BL Lac.
Hagen-Thorn V.A., Larionova E.G., Jorstad S.G., Bjornsson C.-I.,
Larionov V.M.
<Astron. Astrophys. 385, 55 (2002)>
=2002A&A...385...55H (SIMBAD/NED BibCode)
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ADC_Keywords: BL Lac objects ; Polarization
Keywords: BL Lac objects: individual: BL Lac - techniques: polarimetric
Description:
Both photometric and polarimetric data of BL Lac were obtained with
the .5-m telescopes of the Byurakan station of the Astronomical
Institute of St.-Petersburg University.
Objects:
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RA (2000) DE Designation(s)
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22 02 43.3 +42 16 40 BL Lac = QSO B2200+420
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 71 451 Polarisation parameters
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See also:
II/206 : Stellar Polarization Bibliography (Belous, 1996)
II/226 : Stellar polarization catalogs agglomeration (Heiles, 2000)
J/A+A/332/410 : Quasar polarization (Hutsemekers 1998)
J/A+A/340/371 : Quasar polarization of BAL and lensed QSOs (Hutsemekers+ 1998)
J/A+A/353/77 : Variability + polarization of luminous QSOs (Teerikorpi+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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2- 12 F11.3 d JD Julian Date of Observation
16- 20 F5.3 mJy I Intensity of radiation in B band (1)
23- 28 F6.3 mJy Q Q Stokes parameter (in B band)
31- 36 F6.3 mJy U U Stokes parameter (in B band)
39- 45 F7.3 % Px Relative Stokes parameter Q/I (in B band)
48- 54 F7.3 % Py Relative Stokes parameter U/I (in B band)
58- 63 F6.3 % p Polarization degree (in B band)
67- 71 F5.1 deg Theta Polarizaton electric vector direction
(North through East)
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Note (1): Both intensity and polarization parameters refer to BL Lac central
point source (host galaxy subtracted)
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Acknowledgements: Valeri Larionov <VML@VL1104.spb.edu>
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(End) Patricia Bauer [CDS] 06-Feb-2002