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J/ApJ/512/125   Polarization of broad absorption line QSOs  (Schmidt+, 1999)

The polarization of broad absorption line QSOs Schmidt G.D., Hines D.C. <Astrophys. J. 512, 125 (1999)> =1999ApJ...512..125S (SIMBAD/NED BibCode)
ADC_Keywords: Polarization; QSOs; Surveys Keywords: polarization - quasars: absorption lines - quasars: emission lines - quasars: general - surveys Abstract: We present the combined results of optical polarization surveys of QSOs showing broad absorption lines (BALQSOs) conducted at the Steward and McDonald Observatories. The merged list of 53 objects provides the first statistical justification for claims of the tendency of BALQSOs to show stronger than average polarization, with a typical BALQSO being polarized a factor 2.4 times greater than a QSO from an optical survey selected without regard for absorption lines. Spectropolarimetry of sufficient quality to distinguish the polarization of emission lines versus absorption troughs versus continuum is also presented for six objects from the survey. Description: The measurements were made in nearly identical wavebands and with similar sensitivities using several generations of polarimeter at Steward Observatory of both the Pockels cell and rotating wave plate variety and with the Breger polarimeter at McDonald (Breger 1977; Wills et al. 1992). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 85 130 Polarization survey of QSOs
See also: J/A+A/332/410 : Quasar polarization (Hutsemekers 1998) J/A+A/340/371 : Quasar polarization (Hutsemekers+ 1998) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Name QSO object name 18- 22 F5.3 --- z Redshift of Name 24- 26 A3 --- f_Pol [Sum] Indicates polarization and position angles are error-weighted means 29- 32 I4 yr Obs.Y ? Year of observation 33- 34 I2 "month" Obs.M ? Month of observation 35- 36 I2 d Obs.D ? Day of observation 38 I1 d UpR.D ? Indicates observations carried out over a range of days and is the upper value 41- 48 A8 --- Tele Telescope used. (1) 50- 54 A5 --- Band Filter band of the observations (2) 56 A1 --- r_Band [b] Indicates observation obtained by B. Wills 1998, private communication 58- 62 F5.2 % Pol Degree of polarization 68- 71 F4.2 % e_Pol Uncertainty in Pol 74- 78 F5.1 deg PolPA Position angle 82- 85 F4.1 deg e_PolPA Uncertainty in PolPA
Note (1): the telescopes are: MO = McDonald Observatory SO = Steward Observatory KPNO = Kitt Peak National Observatory Note (2): W = white light observation at 3200 - 8600 Å
History: From the ApJ electronic edition References: Breger, M. 1977, ApJ, 215, 119 (1977ApJ...215..119B) Wills, B. J., Wills, D., Breger, M., Antonucci, R. R. J., & Barvainis, R. 1992, ApJ, 398, 454 (1992ApJ...398..454W)
(End) Greg Schwarz [AAS] 02-Mar-2000
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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