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J/A+A/478/321       QSO Type1/Type2 dichotomy                (Borguet+, 2008)

Evidence of a Type1/Type2 dichotomy in the correlation between quasar optical polarization and host galaxy/extended emission position angles. Borguet B., Hutsemekers D., Letawe G., Letawe Y., Magain P. <Astron. Astrophys. 478, 321 (2008)> =2008A&A...478..321B
ADC_Keywords: QSOs ; Polarization ; Radio sources ; Morphology Keywords: galaxies: quasars: general ; polarization Abstract: For Seyfert galaxies, the AGN unification model provides a simple and well-established explanation of the type 1/type 2 dichotomy through orientation-based effects. The generalization of this unification model to the higher luminosity AGNs that quasars are remains a key question. The recent detection of type 2 radio-quiet quasars seems to support such an extension. We propose a further test of this scenario. On the basis of a compilation of quasar host-galaxy position angles consisting of previously published data and of new measurements performed using HST Archive images, we investigate the possible existence of a correlation between the linear polarization position angle and the host-galaxy/extended emission position angle of quasars. Description: This table contains the measurements/compilation of host galaxy/ extended emission position angle in the visible and near-IR domain, polarimetric data, and radio axis orientation for the 135 quasars of our sample. The angles are given in degrees east of north. The table gives the spectral and the radio-loud/radio-quiet classification of each object according to the references. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table6.dat 140 135 Morphology/polarimetric/radio measurements for 135 quasars refs.dat 66 44 References
See also: J/ApJS/122/81 : HST snapshot survey of 3CR radio sources (Martel+, 1999) J/A+AS/142/451 : Optical Polarization of 47 QSOs (Lamy+, 2000) J/ApJ/569/23 : Optical polarisation of 2MASS QSOs (Smith+, 2002) Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 23 A23 --- Name Quasar name 25- 26 I2 h RAh Right ascension (J2000) 28- 29 I2 min RAm Right ascension (J2000) 31- 34 F4.1 s RAs Right ascension (J2000) 36 A1 --- DE- Declination sign 37- 38 I2 deg DEd Declination (J2000) 40- 41 I2 arcmin DEm Declination (J2000) 43- 44 I2 arcsec DEs Declination (J2000) 47- 51 F5.3 --- z Redshift 53- 55 A3 --- Type QSO type (1) 58- 61 F4.2 --- b/av ? Axial ratio in visible domain (2) 63- 65 I3 deg PAv ? Host/extended emission position angle (E of N) 67- 71 A5 --- Filtv Filter's name (3) 73- 76 A4 --- r_b/av (b/av)/PAv references, in refs.dat file 79- 82 F4.2 --- b/ai ? Axial ratio in near-IR domain (2) 84- 86 I3 deg PAi ? Host/extended emission position angle (E of N) 88- 92 A5 --- Filti Filter's name (3) 94- 97 A4 --- r_b/ai (b/ai)/PAi references, in refs.dat file 99-103 F5.2 % Pol Optical polarization degree 105-108 F4.2 % e_Pol Uncertainty on polarization degree 110-112 I3 deg PApol Optical polarization position angle 114-115 I2 deg e_PApol Uncertainty on polarization position angle 117-120 A4 --- r_Pol Polarization data reference, in refs.dat file 123-125 I3 deg PArad ? Radio jet position angle 127-140 A14 --- r_PArad Radio jet references, in refs.dat file
Note (1): Types as follows: RQ1 = Type1 radio-quiet quasar RQ2 = Type2 radio-quiet quasar RL1 = Type1 radio-loud quasar RL2 = Type2 radio-loud quasar (NLRG) Note (2): Axial ratio in visible domain: * we put b/a=1.01 when the quality criterion = 2, because the corresponding PA_host is not certain (see Sect.3 for more details). * no Vis or near-IR PA_host measurement is provided when quality the criterion = 3 * the b/a from Lehnert et al. (1999ApJS..123..351L) are arbitrarily set to b/a=0.9 since no b/a were provided in that paper. Note (3): Name of the HST filter/band
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 4 A4 --- Ref Reference code 6- 24 A19 --- BibCode BibCode 26- 44 A19 --- Aut Author's name 46- 66 A21 --- Com Comments
History: * 17-Jan-2008: First version * 03-Mar-2008: 3 filters "Filtv" corrected in table1 Acknowledgements: Benoit Borguet, B.Borguet(at)
(End) B. Borguet [University of Liege (Belgium)], P. Vannier [CDS] 27-Nov-2007
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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