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J/AJ/134/799      Multiwaveband polarimetry of 15 AGN     (Jorstad+, 2007)

Multiwaveband polarimetric observations of 15 active galactic nuclei at high frequencies: correlated polarization behavior. Jorstad S.G., Marscher A.P., Stevens J.A., Smith P.S., Forster J.R., Gear W.K., Cawthorne T.V., Lister M.L., Stirling A.M., Gomez J.L., Greaves J.S., Robson E.I. <Astron. J., 134, 799-824 (2007)> =2007AJ....134..799J
ADC_Keywords: BL Lac objects ; Polarization Keywords: BL Lacertae objects: individual (1803+784, 1823+568, 3C 66A, BL Lac, OJ 287) - galaxies: active - galaxies: individual (3C 111, 3C 120) - galaxies: jets - polarization - quasars: individual (0420-014, 0528+134, 3C 273, 3C 279, 3C 345, 3C 454.3, CTA 102, PKS 1510-089) Abstract: We report on multifrequency linear polarization monitoring of 15 active galactic nuclei containing highly relativistic jets with apparent speeds from ∼4c to >40c. The measurements were obtained at optical, 1mm, and 3mm wavelengths, and at 7mm with the Very Long Baseline Array. The data show a wide range in degree of linear polarization among the sources, from <1% to >30%, and interday polarization variability in individual sources. The polarization properties suggest separation of the sample into three groups with low, intermediate, and high variability of polarization in the core at 7mm (LVP, IVP, and HVP, respectively). Description: We have measured the total flux densities and polarization of the objects in our sample in four spectral regions: at 7mm (43GHz), 3mm (86GHz), 0.85/1.3mm (350/230GHz), and optical wavelengths (an effective wavelength of ∼600-700nm). Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 04 23 15.8 -01 20 33 0420-014 = QSO B0420-0127 05 30 56.4 +13 31 55 0528+134 = QSO J0530+13 15 12 50.5 -09 06 00 1510-089 = QSO J1512-0906 18 24 07.1 +56 51 01 1823+568 = QSO 1823+568 04 18 21.3 +38 01 36 3C 111 = 2C 379 04 33 11.1 +05 21 16 3C 120 = 3A 0430+048 12 29 06.7 +02 03 09 3C 273 = 2A 1225+022 12 56 11.2 -05 47 22 3C 279 = 1AXG J125611-0547 16 42 58.8 +39 48 37 3C 345 = B2 1641+39 22 53 57.7 +16 08 54 3C 454.3 = BWE 2251+1552 02 22 39.6 +43 02 08 3C 66A = B3 0219+428A 22 02 43.3 +42 16 40 BL Lac = QSO B2200+420 22 32 36.4 +11 43 51 CTA 102 = 4C 11.69 08 54 48.9 +20 06 31 OJ 287 = QSO J0854+2006 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 70 96 Optical Polarization Data table2.dat 55 144 JCMT Polarization Data table3.dat 46 157 BIMA Polarization Data table4.dat 60 254 VLBA Polarization Data for the Core table5.dat 73 249 VLBA Polarization Data for the Jet Component
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Source name 10- 19 A10 "YYYY/MM/DD" ObsDate Date of observation 21 A1 --- F1 [VR] Photometry filter bandpass 23 A1 --- f_F1 [ab] photometric estimate (1) 25- 29 F5.2 mag mag ? Apparent magnitude in F1 31- 34 F4.2 mag e_mag ? Uncertainty in mag 36- 40 F5.2 mJy Iopt ? Optical flux density 42- 45 F4.2 mJy e_Iopt ? Uncertainty in Iopt 47 A1 --- F2 [BVRIW] Polarimetry filter bandpass (2) 49 A1 --- l_mopt Limit flag on mopt 50- 54 F5.2 % mopt Degree of linear polarization 56- 59 F4.2 % e_mopt ? Uncertainty in mopt 61- 65 F5.1 deg chiopt ? Polarization position angle 67- 70 F4.1 deg e_chiopt ? Uncertainty in chiopt
Note (1): Flags as follows: a = photometric estimate is obtained at the 72-inch Perkins telescope of the Lowell observatory, Flagstaff, Arizona b = photometric estimate is found in the Colgate University quasar optical monitoring data base, http://astronomy.colgate.edu/astronomy/quasaroptical.html Note (2): where W denotes an unfiltered, or "white-light" measurement.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Source name 10- 19 A10 "YYYY/MM/DD" ObsDate Date of observation 21- 24 F4.2 mm lambda Observed wavelength (0.85 or 1.35) 26- 30 F5.2 Jy I1mm Flux density at lambda 32- 35 F4.2 Jy e_I1mm Uncertainty in I1mm 37- 40 F4.1 % m1mm ? Degree of linear ploarization at lambda 42- 45 F4.1 % e_m1mm ? Uncertainty in m1mm 46 A1 --- u_m1mm Uncertainty flag on m1mm (1) 48- 50 I3 deg chi1mm ? Polarization position angle at lambda 52- 54 I3 deg e_chi1mm ? Uncertainty in chi1mm 55 A1 --- u_chi1mm Uncertainty flag on chi1mm (1)
Note (1): Result uncertain due to the weather conditions.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Source name 10- 19 A10 "YYYY/MM/DD" ObsDate Date of observation 21- 25 F5.2 Jy I3mm Flux density at 3mm (86GHz) 27- 30 F4.2 Jy e_I3mm Uncertainty in I3mm 32- 35 F4.1 % m3mm Degree of linear ploarization at 3mm 37- 39 F3.1 % e_m3mm Uncertainty in m3mm 41- 43 I3 deg chi3mm Polarization position angle at 3mm 45- 46 I2 deg e_chi3mm Uncertainty in chi3mm
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Source name 10- 19 A10 "YYYY/MM/DD" ObsDate Date of observation 21- 25 F5.2 Jy I7mm Flux density in the core at 7mm (43GHz) 27- 30 F4.2 Jy e_I7mm Uncertainty in I7mm 32- 37 F6.1 deg theta Projected inner jet direction 39- 41 F3.1 deg e_theta Uncertainty in theta 43 A1 --- l_m7mm Limit flag on m7mm 45- 48 F4.1 % m7mm Degree of linear polarization in the core at 7mm 50- 52 F3.1 % e_m7mm ? Uncertainty in m7mm 54- 57 I4 deg chi7mm ? Polarization position angle in the core at 7mm 59- 60 I2 deg e_chi7mm ? Uncertainty in chi7mm
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Source name 10- 19 A10 "YYYY/MM/DD" ObsDate Date of observation 21- 25 A5 --- Comp Jet component designation 27- 31 F5.2 --- I7mm Flux density of jet component at 7mm (43GHz) 33- 36 F4.2 --- e_I7mm Uncertainty in I7mm 38- 41 F4.2 mas R Component distance from the core 43- 46 F4.2 mas e_R Uncertainty in R 48- 53 F6.1 deg theta Component position angle relative to the core 55- 57 F3.1 deg e_theta Uncertainty in theta 59- 62 F4.1 % m7mm Degree of linear polarization of component at 7mm 64- 66 F3.1 % e_m7mm Uncertainty in m7mm 68- 70 I3 deg chi7mm ? Polarization position angle of component at 7mm 72- 73 I2 deg e_chi7mm ? Uncertainty in chi7mm
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 30-Sep-2009
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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