J/AJ/137/3718 15GHz monitoring of AGN jets with VLBA (Lister+, 2009)
MOJAVE: monitoring of jets in active galactic nuclei with VLBA experiments.
V. Multi-epoch VLBA images.
Lister M.L., Aller H.D., Aller M.F., Cohen M.H., Homan D.C., Kadler M.,
Kellermann K.I., Kovalev Y.Y., Ros E., Savolainen T., Zensus J.A.,
Vermeulen R.C.
<Astron. J., 137, 3718-3729 (2009)>
=2009AJ....137.3718L 2009AJ....137.3718L
ADC_Keywords: Radio sources ; BL Lac objects ; Active gal. nuclei ; QSOs
Keywords: BL Lacertae objects: general - galaxies: active - galaxies: jets -
quasars: general - radio continuum: galaxies - surveys
Abstract:
We present images from a long-term program (MOJAVE: Monitoring of Jets
in active galactic nuclei (AGNs) with VLBA Experiments) to survey the
structure and evolution of parsec-scale jet phenomena associated with
bright radio-loud active galaxies in the northern sky. The
observations consist of 2424 15GHz Very Long Baseline Array (VLBA)
images of a complete flux-density-limited sample of 135 AGNs above
declination -20°, spanning the period 1994 August to 2007 September.
These data were acquired as part of the MOJAVE and 2cm Survey
programs, and from the VLBA archive. The sample-selection criteria are
based on multi-epoch parsec-scale (VLBA) flux density, and heavily
favor highly variable and compact blazars. The sample includes nearly
all the most prominent blazars in the northern sky, and is well suited
for statistical analysis and comparison with studies at other
wavelengths. Our multi-epoch and stacked-epoch images show 94% of the
sample to have apparent one-sided jet morphologies, most likely due to
the effects of relativistic beaming. Of the remaining sources, five
have two-sided parsec-scale jets, and three are effectively unresolved
by the VLBA at 15GHz, with essentially all of the flux density
contained within a few tenths of a milliarcsecond.
Description:
The 15GHz VLBA data presented in this paper consist of observations
carried out between 1994 and 2007 as part of the VLBA 2cm Survey and
MOJAVE programs, and data from the online NRAO data archive spanning
the period 1998-2006.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 117 135 The complete flux-limited MOJAVE AGN sample
table2.dat 74 2424 Summary of 15GHz image parameters
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See also:
J/AJ/130/1389 : Linear polarization of AGN jets at 15GHz (Lister+, 2005)
J/AJ/131/1262 : Circular polarization of AGN jets at 15GHz (Homan+, 2006)
J/ApJS/171/376 : MOJAVE. III. VLA 1.4GHz images (Cooper+, 2007)
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
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name Source IAU name (B1950.0)
10- 18 A9 --- Alias Alternate name
20- 21 I2 h RAh Hour of Right Ascension (J2000)
23- 24 I2 min RAm Minute of Right Ascension (J2000)
26- 32 F7.4 s RAs Second of Right Ascension (J2000)
34 A1 --- DE- Sign of the Declination (J2000)
35- 36 I2 deg DEd Degree of Declination (J2000)
38- 39 I2 arcmin DEm Arcminute of Declination (J2000)
41- 47 F7.4 arcsec DEs Arcsecond of Declination (J2000)
49- 50 I2 --- Nep Number of 15 GHz VLBA epochs analyzed
52 A1 --- cl [QBGU] Optical classification (1)
54 A1 --- f_cl [abcd] class differs from Veron catalog (2)
56- 58 A3 --- sp [FSPe ] Radio spectrum description (3)
60- 67 F8.6 --- z ? Redshift
69-117 A49 --- r_z Reference for z
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Note (1): According to the Veron-Cetty and Veron (2006, Cat. VII/248) catalog
(with exceptions as noted in f_cl) as follows:
Q = quasar
B = BL Lac object
G = active galaxy
U = unidentified
Note (2): Classification in Veron-Cetty and Veron (2006, Cat. VII/248)
catalog differs, as follows:
a = Source classified as a quasar
b = Source classified as a possible BL Lac object
c = Source classified as a galaxy
d = Source not listed
Note (3): From Kellermann et al. (2004, Cat. J/ApJ/609/539) as follows:
F = flat
S = steep
P = peaked
e = compact steep spectrum source
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name Source IAU Name (B1950.0)
10- 19 A10 "YYYY/MM/DD" Obs.Date Date of VLBA observation
21- 28 A8 --- Code VLBA experiment configuration code
30 A1 --- f_Code [ab] Configuration pecularity (1)
32- 35 F4.1 GHz Freq Observing frequency
37- 40 F4.2 mas Bmaj Restoring beam major axis FWHM
42- 45 F4.2 mas Bmin Restoring beam minor axis FWHM
47- 49 I3 deg PA [-90/90] Restoring beam major axis
position angle
51- 56 F6.3 Jy Itot Total I flux density at 15GHz
58- 61 F4.1 mJy rms RMS noise level of image (in mJy/beam)
63- 67 F5.1 mJy Ibase Lowest I contour at 15GHz (in mJy/beam)
69- 74 F6.4 --- Fig Figure number
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Note (1): Flag on Code as follows:
a = Full polarization MOJAVE VLBA epoch
b = 2cm VLBA Survey epoch
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History:
From electronic version of the journal
References:
Lister & Homan Paper I. 2005AJ....130.1389L 2005AJ....130.1389L Cat. J/AJ/130/1389
Homan et al. Paper II. 2006AJ....131.1262H 2006AJ....131.1262H Cat. J/AJ/131/1262
Cooper et al. Paper III. 2007ApJS..171..376C 2007ApJS..171..376C Cat. J/ApJS/171/376
Cara & Lister Paper IV. 2008ApJ...674..111C 2008ApJ...674..111C
Lister et al. Paper VI. 2009AJ....138.1874L 2009AJ....138.1874L Cat. J/AJ/138/1874
Homan et al. Paper VII. 2009ApJ...706.1253H 2009ApJ...706.1253H Cat. J/ApJ/706/1253
Hovatta et al. Paper VIII. 2012AJ....144..105H 2012AJ....144..105H Cat. J/AJ/144/105
Pushkarev et al. Paper IX. 2012A&A...545A.113P 2012A&A...545A.113P Cat. J/A+A/545/A113
Lister et al. Paper X. 2013AJ....146..120L 2013AJ....146..120L Cat. J/AJ/146/120
Hovatta et al. Paper XI. 2014AJ....147..143H 2014AJ....147..143H Cat. J/AJ/147/143
Homan et al. Paper XII. 2015ApJ...798..134H 2015ApJ...798..134H Cat. J/ApJ/798/134
Lister et al. Paper XIII. 2016AJ....152...12L 2016AJ....152...12L Cat. J/AJ/152/12
Pushkarev et al. Paper XIV. 2017MNRAS.468.4992P 2017MNRAS.468.4992P Cat. J/MNRAS/468/4992
Lister et al. Paper XV. 2018ApJS..234...12L 2018ApJS..234...12L Cat. J/ApJS/234/12
Hodge et al. Paper XVI. 2018ApJ...862..151H 2018ApJ...862..151H Cat. J/ApJ/862/151
Lister et al. Paper XVII. 2019ApJ...874...43L 2019ApJ...874...43L Cat. J/ApJ/874/43
Lister et al. Paper XVIII. 2021ApJ...923...30L 2021ApJ...923...30L Cat. J/ApJ/923/30
Homan et al. Paper XIX. 2021ApJ...923...67H 2021ApJ...923...67H Cat. J/ApJ/923/67
Pushkarev et al. Paper XX. 2023MNRAS.520.6053P 2023MNRAS.520.6053P
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 27-Aug-2011