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J/A+A/427/107       Polarization in BAL QSOs                 (Lamy+, 2004)

Polarization properties of broad absorption line QSOs : new statistical clues. Lamy H., Hutsemekers D. <Astron. Astrophys. 427, 107 (2004)> =2004A&A...427..107L
ADC_Keywords: QSOs ; Polarization Keywords: galaxies: quasars: general - galaxies: quasars: absorption lines - polarization Abstract: We report the results of several statistical tests performed on a large sample of 139 broad absorption line (BAL) QSOs with good quality optical spectra and/or optical polarization data. Correlations between ten optical indices and the polarization degree p0 are systematically searched for. Description: Table 1 contains optical properties of 139 BAL QSOs. It is essentially a compilation of 93 BAL QSOs coming from large polarization surveys. In addition, we also consider 46 BAL QSOs with good quality optical (UV rest-frame) spectra but no polarization data. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 177 139 Optical measurements for the BAL QSO sample
See also: J/A+AS/142/451 : Optical Polarization of 47 QSOs (Lamy+, 2000) J/A+A/340/371 : Quasar polarization (Hutsemekers+ 1998) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Quasar name 13- 14 I2 h RAh Right ascension (J2000) 16- 17 I2 min RAm Right ascension (J2000) 19- 23 F5.2 s RAs Right ascension (J2000) 26 A1 --- DE- Declination sign (J2000) 27- 28 I2 deg DEd Declination (J2000) 30- 31 I2 arcmin DEm Declination (J2000) 33- 36 F4.1 arcsec DEs ? Declination (J2000) 40- 43 F4.2 --- z Redshift 48 I1 --- Type BAL QSO type (1) 53- 56 F4.2 % Pol ? Polarization degree 61- 64 F4.2 % e_Pol ? Uncertainty of polarization degree 69- 72 F4.2 % Pol0 ? Debiased polarization degree 77 I1 --- r_Pol ? References for polarization data (2) 81- 85 I5 km/s BI ? Balnicity index (3) 89- 93 F5.2 --- DI ? Detachment index (4) 98-101 I4 km/s HWHM(CIV) ? CIV Half Width at Half Maximum 106-109 I4 km/s HWHM([CIII]) ? [CIII] Half Width at Half Maximum 114-117 F4.1 0.1nm HREW(CIV) ? CIV Rest Equivalent Width (5) 122-125 F4.1 0.1nm REW([CIII]) ? [CIII] Rest Equivalent Width 130-134 F5.2 0.1nm REW(FeII2400) ? FeII 2400 Rest Equivalent Width 138-142 F5.2 0.1nm REW(FeII2070) ? FeII 2070 Rest Equivalent Width 146-150 F5.2 --- alphaB ? Continuum slope B 154-158 I5 km/s Vmax ? Maximum velocity in the CIV trough 163-165 I3 --- Ref2 References for optical indices (6) 170-175 F6.2 mag BMAG ? B absolute Magnitude
Note (1): Object Type: 2 = HIBAL QSOs 3 = Strong LIBAL QSOs 4 = Weak LIBAL QSOs 5 = Marginal LIBAL QSOs 6 = Unclassified BAL QSO. Note (2): Reference for polarization data: 1 = Hutsemekers et al., 1998, Cat. J/A+A/340/371, Paper I 2 = Lamy & Hutsemekers, 2000, Cat. J/A+AS/142/451 3 = Schmidt & Hines, 1999ApJ...512..125S 4 = Ogle et al., 1999ApJS..125....1O (Keck observations) 5 = Ogle et al., 1999ApJS..125....1O (Palomar observations) 6 = Brotherton et al., 2002AJ....124.2575B 7 = Sluse et al., 2004, A&A, in prep. 8 = Hutsemekers et al., 2004, in prep. Note (3): The Balnicity index is a modified velocity equivalent width of the C IV BAL. Note (4): The Detachment index measure the onset velocity of the strongest C IV BAL trough in units of the adjacent emission line half-width, that is the degree of detachment of the absorption line relative to the emission one. Note (5): Only the red half of the CIV absorption line is considered in the measurement of the Equivalent Width. Note (6): Reference for the spectra from which indices are measured. They are encoded with 3 digits: each non-zero digit designates a specific reference: 1: Hutsemekers et al., 1998, Cat. J/A+A/340/371, Paper I 2: Hutsemekers & Lamy, 2000A&A...358..835H, Paper II 3: Weymann et al., 1991ApJ...373...23W 4: Becker et al. 2000ApJ...538...72B, 2001, Cat. J/ApJS/135/227 5: Menou et al., 2001ApJ...561..645M 6: Korista et al., 1993ApJS...88..357K 7: Ogle et al., 1999ApJS..125....1O 8: spectra scanned from Large Bright Quasar Survey (LBQS) 9: Brotherton et al., 2002AJ....124.2575B
Acknowledgements: Herve Lamy History: * 02-Sep-2004: Original version * 22-Feb-2005: Declination of Quasar B0842+3431 corrected from +12 19 44.0 to +34 20 43.9
(End) Herve Lamy [BIRA-IASB], Patricia Vannier [CDS] 02-Sep-2004
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