J/A+A/566/A59 3.5 and 1.3mm polarimetric survey of Northern AGNs (Agudo+, 2014)
A simultaneous 3.5 and 1.3 mm polarimetric survey of active galactic nuclei
in the northern sky.
Agudo I., Thum C., Gomez J.L., Wiesemeyer H.
<Astron. Astrophys., 566, A59-59 (2014)>
=2014A&A...566A..59A 2014A&A...566A..59A
ADC_Keywords: Active gal. nuclei ; QSOs ; Polarization
Keywords: galaxies: active - galaxies: jets - quasars: general -
BL Lacertae objects: general - polarization - surveys
Abstract:
Short millimeter observations of radio-loud active galactic nuclei
(AGN) offer an excellent opportunity to study the physics of their
synchrotron-emitting relativistic jets from where the bulk of radio
and millimeter emission is radiated. On one hand, AGN jets and their
emission cores are significantly less affected by Faraday rotation and
depolarization than at longer wavelengths. On the other hand, the
millimeter emission of AGN is dominated by the compact innermost
regions in the jets, where the jet cannot be seen at longer
wavelengths due to synchrotron opacity.
We present the first simultaneous dual frequency 86GHz and 229GHz
polarimetric survey of all four Stokes parameters for a large sample
of 211 radio-loud active galactic nuclei, designed to be flux limited
at 1Jy at 86GHz.
Most of the observations were made in mid-August 2010 using the XPOL
polarimeter on the IRAM 30m millimetric radio telescope.
Description:
The observations were performed with the XPOL polarimeter connected to
the E090 and E230 EMIR receiver system on the IRAM 30m telescope. The
advanced design of EMIR allowed us to perform the observations
simultaneously at 3.5mm (86GHz with the E090 pair of orthogonal
receivers) and 1.3mm (229GHz with the E230 pair of orthogonal
receivers) without loss of a significant amount of signal at either
waveband. The flexibility of the VESPA autocorrelator in polarimetric
mode (i.e., XPOL) also allows us to simultaneously process the 86 and
229GHz signals, although with a limited bandwidth of 640MHz for each
of the two orthogonally polarized receivers of the E090 band and
320MHz for those of the E230 band.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 82 211 Source properties
table2.dat 109 211 Summary of observing results
notes.dat 80 64 Individual notes
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See also:
J/A+A/332/410 : Quasar polarization (Hutsemekers 1998)
J/A+A/340/371 : Quasar polarization (Hutsemekers+ 1998)
J/ApJ/512/125 : Polarization of broad absorption line QSOs (Schmidt+, 1999)
J/A+AS/142/451 : Optical Polarization of 47 QSOs (Lamy+, 2000)
J/ApJ/569/23 : Optical polarisation of 2MASS QSOs (Smith+, 2002)
J/ApJ/589/733 : VLBI polarimetry of CJF sources (Pollack+, 2003)
J/A+A/427/107 : Polarization in BAL QSOs (Lamy+, 2004)
J/A+A/433/757 : Optical polarization of 203 QSOs (Sluse+, 2005)
J/AJ/130/1389 : Linear polarization of AGN jets at 15GHz (Lister+, 2005)
J/AJ/131/1262 : AGN jets circular polarization images at 15GHz (Homan+, 2006)
J/ApJS/189/1 : A 3.5mm polarimetric survey of radio-loud AGNs (Agudo+, 2010)
J/ApJS/194/19 : Optical linear polarization at McDonald Obs. (Wills+, 2011)
J/AJ/144/105 : MOJAVE. VIII. Faraday rotation in AGN jets. (Hovatta+, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name IAU B1950.0 source name
10 A1 --- n_Name Note on Name, in notes.dat file
12- 28 A17 --- OName Source name in other catalogs
30- 31 I2 h RAh Observing right ascension (J2000.0)
33- 34 I2 min RAm Observing right ascension (J2000.0)
36- 42 F7.4 s RAs Observing right ascension (J2000.0)
44 A1 --- DE- Observing declination sign (J2000.0)
45- 46 I2 deg DEd Observing declination (J2000.0)
48- 49 I2 arcmin DEm Observing declination (J2000.0)
51- 56 F6.3 arcsec DEs Observing declination (J2000.0)
58 A1 --- l_z Limit flag on z
59- 63 F5.3 --- z [0/3.5]?=- Redshift from Veron-Cetty & Veron
(2006, Cat. VII/248)
65 A1 --- Cl [BGQU] Optical classification from
Veron-Cetty & Veron (2006, Cat. VII/248):
B=BL Lac; G=Galaxy; Q=Quasar; U=Unknown
67- 70 F4.1 mag Vmag ?=- V magnitude from Veron-Cetty & Veron (2006,
Cat. VII/248)
72- 74 I3 deg phiJet [0/360]? Jet position angle (φjet)
76- 77 I2 GHz nuObs [5/86]? VLBI observing frequency for the image
from which phiJet was obtained
79- 80 I2 --- r_phiJet ? References from which phijet was obtained (1)
82 A1 --- 2LAC? [Yy ] Fermi-2LAC source
(Y=yes, y=yes but not in the clean list)
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Note (1): References as follows:
1 = Agudo et al. (2007A&A...476L..17A 2007A&A...476L..17A, Cat. J/A+A/476/L17)
2 = BU- Blazar Group Web Page
3 = Fomalont et al. (2000ApJS..131...95F 2000ApJS..131...95F, Cat. J/ApJS/131/95)
4 = Jorstad et al. (2005AJ....130.1418J 2005AJ....130.1418J, Cat. J/AJ/130/1418)
5 = Kellermann et al. (2004ApJ...609..539K 2004ApJ...609..539K, Cat. J/ApJ/609/539)
6 = Lee et al. (2008AJ....136..159L 2008AJ....136..159L, Cat. J/AJ/138/159)
7 = Lister et al. (2001ApJ...554..948L 2001ApJ...554..948L, 2001ApJ...554..964L 2001ApJ...554..964L)
8 = Lister & Homan (2005AJ....130.1389L 2005AJ....130.1389L, Cat. J/AJ/130/1389)
9 = MOJAVE Web Page
10 = USNO Radio Reference Frame Image Database Web Page
11 = Xu et al. (1995ApJS...99..297X 1995ApJS...99..297X, Cat. J/ApJS/99/297)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name IAU B1950.0 source name
10- 19 F10.4 d MJD [55322/55729] MJD observing date
21- 23 F3.1 s Tint [1.7/7.1] Integration time
25 A1 --- l_S86 Limit flag on S86
26- 30 F5.2 Jy S86 ?=- 86.2GHz flux density
32- 35 F4.2 Jy e_S86 ? 86.2GHz flux density
37 A1 --- l_m86L Limit flag on m86L
38- 41 F4.1 % m86L [0/15]?=- 86.2GHz fractional linear polarization
43- 45 F3.1 % e_m86L ? 86.2GHz fractional linear polarization
47 A1 --- l_chi86 Limit flag on chi86
48- 52 F5.1 deg chi86 [0/180]?=- 86.2GHz linear polarization electric
vector position angle
54- 57 F4.1 deg e_chi86 ? 86.2GHz linear polarization electric vector
position angle
59 A1 --- l_m86C Limit flag on m86C
60- 63 F4.1 % m86C [-2.1/4.2]?=- 86.2GHz fractional circular
polarization
65- 67 F3.1 % e_m86C ? 86.2GHz fractional circular polarization
69 A1 --- l_S229 Limit flag on S229
70- 74 F5.2 Jy S229 ?=- 229GHz flux density
76- 79 F4.2 Jy e_S229 ? 229GHz flux density
81 A1 --- l_m229L Limit flag on m229L
82- 85 F4.1 % m229L [0/79]?=- 229GHz fractional linear polarization
87- 89 F3.1 % e_m229L ? 229GHz fractional linear polarization
92- 96 F5.1 deg chi229 [0/180]?=- 229GHz linear polarization electric
vector position angle
98-100 F3.1 deg e_chi229 ? 229GHz linear polarization electric vector
position angle
102-109 E8.3 rad/m2 RM ?=- Absolute value of the maximum rotation
measure allowed from χ86 and χ229,
and computed as a 3σ value
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1 A1 --- Note Note code
3- 80 A78 --- Text Text of the note
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Sep-2014