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J/AJ/131/1262  Circular polarization images at 15GHz of AGN jets  (Homan+, 2006)

MOJAVE: Monitoring of Jets in Active Galactic Nuclei with VLBA Experiments. II. First-epoch 15GHz circular polarization results. Homan D.C., Lister M.L. <Astron. J., 131, 1262-1279 (2006)> =2006AJ....131.1262H
ADC_Keywords: Radio sources ; BL Lac objects ; Active gal. nuclei ; QSOs ; Polarization Keywords: BL Lacertae objects: general - galaxies: active - galaxies: jets - polarization - quasars: general - radio continuum: galaxies Abstract: We report first-epoch circular polarization results for 133 active galactic nuclei in the MOJAVE (Monitoring of Jets in Active Galactic Nuclei with VLBA Experiments) program to monitor the structure and polarization of a flux-limited sample of extragalactic radio jets with the VLBA at 15GHz. We found strong circular polarization (0.3%) in approximately 15% of our sample. The circular polarization was usually associated with jet cores; however, we did find a few strong jet components to be circularly polarized. Description: Each MOJAVE observing session targets 18 sources over a 24hr period, and this paper presents results drawn from the first 11 sessions, from 2002 May 31 through 2004 February 11. The data were recorded at each VLBA antenna at a central observing frequency of 15.366GHz using 1bit sampling and were correlated at the VLBA correlator in Socorro, New Mexico. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 81 133 Circular polarization at Stokes I peak table2.dat 61 8 Circular polarization on off-peak jet cores table3.dat 61 35 Circular polarization on strong jet components table5.dat 32 23 Comparison of core circular polarization at 5 and 15GHz
See also: VII/235 : Quasars and Active Galactic Nuclei (11th Ed.) (Veron+, 2003) J/A+A/386/97 : Parkes quarter-Jansky flat-spectrum sample (Jackson+, 2002) J/ApJ/609/539 : Kinematics of parsec-scale radio jets (Kellermann+, 2004) VII/6 : Polarization of Extragalactic Radiosources (Eichendorf+ 1980) J/A+A/332/410 : Quasar polarization (Hutsemekers 1998) J/A+A/340/371 : Quasar polarization (Hutsemekers+ 1998) J/A+AS/39/379 : Linear Polarization of radio sources (Tabara+ 1980) J/A+AS/135/571 : Extragalactic radio sources polarization (Zukowski+, 1999) J/AJ/130/1389 : AGN jets linear polarization images at 15GHz (Lister+, 2005) J/ApJS/171/376 : MOJAVE. III. VLA 1.4GHz images (Cooper+, 2007) J/AJ/137/3718 : 15GHz monitoring of AGN jets with VLBA (Lister+, 2009) J/AJ/138/1874 : MOJAVE. VI. Kinematic analysis of blazar jets (Lister+, 2009) J/ApJ/706/1253 : MOJAVE VII. Blazar jet acceleration (Homan+, 2009) J/ApJ/710/764 : Extended radio emission in MOJAVE blazars (Kharb+, 2010) J/ApJ/722/L7 : Fermi/LAT detected MOJAVE AGNs (Pushkarev+, 2010) J/A+A/545/A113 : MOJAVE IX. Core shift effects (Pushkarev+, 2012) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name The B1950.0 IAU name 10- 18 A9 --- OName Other name 20- 26 F7.5 --- z ? Redshift (1) 28 A1 --- Ocl Optical Classification (2) 30- 39 A10 "YYYY/MM/DD" ObsDate Year of first MOJAVE observation 41- 45 F5.2 Jy IPeak Stokes I at the map peak in units of Jy/beam 47 A1 --- l_ml Limit flag on ml 48- 53 F6.2 % ml Fractional linear polarization of Stokes I peak 55- 60 F6.2 mJy VPeak Maximum circular polarization measured within 2 pixels of Stokes I peak 62- 65 F4.2 mJy e_VPeak Uncertainty in VPeak 67 A1 --- l_mc Limit flag on mc 68- 72 F5.2 % mc Fractional circular polarization corresponding to VPeak 74- 77 F4.2 % e_mc ? Uncertainty in mc 79- 81 F3.1 --- sigma ? Significance of circular polarization measurement (G1)
Note (1): See Lister & Homan (2005, Cat. J/AJ/130/1389) for references. Note (2): Optical classification, defined as follows: Q = quasar; B = BL Lac object; G = active galaxy; U = unidentified.
Byte-by-byte Description of file: table2.dat table3.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name The B1950.0 IAU name 10- 13 F4.2 mas Rad Radial position (1) 15- 20 F6.1 deg theta Structural position angle (1) 22- 25 F4.2 Jy I Peak Stokes I of core/component in units of Jy/beam (2) 27 A1 --- l_ml Limit flag on ml 28- 33 F6.2 % ml Fractional linear polarization of core/component 35- 40 F6.2 mJy V Maximum circular polarization measured within 2 pixels of core/component peak in units of mJy/beam (2) 42- 45 F4.2 mJy e_V Uncertainty in V 47 A1 --- l_mc Limit flag on mc 48- 52 F5.2 % mc Fractional circular polarization corresponding to V 54- 57 F4.2 % e_mc ? Uncertainty in mc 59- 61 F3.1 --- sigma ? Significance of circular polarization measurement (G1)
Note (1): Of core relative to map peak (table 2), or of component relative to the jet core (table 3). Note (2): At the location of the VLBI core (table 2) or jet component (table 3).
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name The B1950.0 IAU Name 10 A1 --- l_mc5GHz Limit flag on mc15GHz 11- 15 F5.2 % mc5GHz Fractional circular polarization at 5GHz 17- 20 F4.2 % e_mc5GHz ? Error in mc5GHz 22 A1 --- l_mc15GHz Limit flag on mc15GHz 23- 27 F5.2 % mc15GHz Fractional circular polarization at 15GHz 29- 32 F4.2 % e_mc15GHz ? Error in mc15GHz
Global Notes: Note (G1): Where sigma=|mc|/Δmc.
History: From electronic version of the journal References: Lister & Homan, Paper I 2005AJ....130.1389L, Cat. J/AJ/130/1389 Cooper et al., Paper III 2007ApJS..171..376C, Cat. J/ApJS/171/376 Cara & Lister, Paper IV 2008ApJ...674..111C Lister et al., Paper V 2009AJ....137.3718L, Cat. J/AJ/137/3718 Lister et al., Paper VI 2009AJ....138.1874L, Cat. J/AJ/138/1874 Homan et al., Paper VII 2009ApJ...706.1253H, Cat. J/ApJ/706/1253 Hovatta et al., Paper VIII 2012AJ....144..105H, Cat. J/AJ/144/105 Pushkarev et al., Paper IX 2012A&A...545A.113P, Cat. J/A+A/545/A113 Lister et al., Paper X 2013AJ....146..120L, Cat. J/AJ/146/120 Hovatta et al., Paper XI 2014AJ....147..143H, Cat. J/AJ/147/143
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 25-Jan-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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