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J/A+A/476/L17      86 and 43GHz observations of NRAO 150          (Agudo+, 2007)

Superluminal non-ballistic jet swing in the quasar NRAO 150 revealed by mm-VLBI. Agudo I., Bach U., Krichbaum T.P., Marscher A.P., Gonidakis I., Diamond P.J., Perucho M., Alef W., Graham D.A., Witzel A., Zensus J.A., Bremer M., Acosta-Pulido J.A., Barrena R. <Astron. Astrophys., 476, L17-L20 (2007)> =2007A&A...476L..17A
ADC_Keywords: QSOs ; Radio sources ; Interferometry Keywords: galaxies: active - galaxies: jets - galaxies: quasars: general - galaxies: quasars: individual: NRAO 150 - radio continuum: galaxies - techniques: interferometric Abstract: NRAO 150, a compact and bright radio to mm source showing core/jet structure, has been recently identified as a quasar at redshift z=1.52 through a near-IR spectral observation. The aim is to study the jet kinematics on the smallest accessible scales and to compute the first estimates of its basic physical properties. We have analysed the ultra-high-resolution images from a new monitoring program at 86GHz and 43GHz with the Global mm VLBI Array and the VLBA, respectively. An additional archival calibration VLBA data set, covering the period from 1997 to 2007, has been used. Our data show an extreme projected counter-clockwise jet position angle swing at an angular rate of up to ∼11°/yr within the inner ∼3pc of the jet, which is associated with a non-ballistic superluminal motion of the jet within this region. Description: The data set presented here consists of 5 VLBI images at 86GHz taken with the Global mm VLBI Array (GMVA, and its predecessor, the CMVA) covering the time range from October 2001 to April 2004, and 34 Very Long Baseline Array (VLBA) images taken at 43GHz from June 1997 to February 2007. Among these 34 images, 20 obtained from June 1997 to May 2002 were taken as calibration measurements of the SiO maser monitoring program of TX Cam. A new 8.4GHz VLBA image obtained in June 2002 is also presented here. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 03 59 29.7 +50 57 50 NRAO 150 = 4C 50.11 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 53 40 86GHz and 43GHz image information table2.dat 69 140 86GHz, 43GHz and 8.4GHz circular-Gaussian model-fit parameters table3.dat 80 3 Proper motion results (for Q1, Q2 and Q3)
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Image Image information (86GHz, 43GHz or 8.4GHz) 8- 14 F7.2 yr Epoch Epoch of observation 16- 18 I3 min Tint Intergation time 20- 22 I3 MHz Dnuobs Observing frequency bandwidth 24 I1 --- Bits Number of bits used for the signal digitalisation sampling 26- 29 I4 uarcsec FWHMb FWHM minor axes of the restoring beam 31- 33 I3 uarcsec FWHMa FWHM major axes of the restoring beam 35- 39 F5.1 deg PA [-90/90] Orientation angle of the restoring beam 41- 44 F4.2 Jy Sint Integrated total flux density (86, 43 or 8.4GHz) 46- 49 F4.2 Jy Speak Peak flux density (in Jy/beam) 51- 53 F3.1 mJy Noise Noise level of the resulting images (in mJy/beam)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Image Image information (86GHz, 43GHz or 8.4GHz) 8- 14 F7.2 yr Epoch Epoch of observation 16- 19 A4 --- Comp Model component 21- 22 A2 --- l_S [≲ ] Limit flag on S (1) 23- 27 F5.3 Jy S Flux density 29- 33 F5.3 Jy e_S ? rms uncertainty on S 35- 39 F5.2 mas r ?=- Projected distance to the core 41- 44 F4.2 mas e_r ? rms uncertainty on r 46- 51 F6.1 deg PA [-170/170]?=- Position angle with respect to the core 53- 56 F4.1 deg e_PA ? rms uncertainty on PA 58 A1 --- l_FWHM Limit flag on FWHM (1) 59- 63 F5.3 mas FWHM ?=- FWHM size 65- 69 F5.3 mas e_FWHM ? rms uncertainty on FWHM
Note (1): Upper limits on the FWHM size and S correspond to fits of unresolved jet regions. For such fits, the upper limit of the sizes were imposed in Difmap to estimate the corresponding flux density upper limits. The latter are close approximations to the actual flux densities of the unresolved regions.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Comp Model component (Q1, Q2 and Q3) 4- 5 I2 --- N Number of data points for the fit of the trajectory 7- 11 F5.1 deg <PA> Mean position angle 13- 15 F3.1 deg e_<PA> rms uncertainty on <PA> 17- 20 F4.1 deg/yr <PA/dt> Mean angular speed 22- 24 F3.1 deg/yr e_<PA/dt> rms uncertainty on <PA/dt> 26- 30 F5.3 mas/yr <pm> Mean proper motion 32- 36 F5.3 mas/yr e_<pm> rms uncertainty on <pm> 38- 41 F4.2 c b<pm> Superluminal apparent speed for <pm> 43- 46 F4.2 c e_b<pm> rms uncertainty on b<pm> 48- 52 F5.3 mas/yr <pmrad> Mean radial component of proper motion 54- 58 F5.3 mas/yr e_<pmrad> rms uncertainty on <pmrad> 60- 64 F5.3 mas/yr <pmnor> Mean normal component of proper motion 66- 70 F5.3 mas/yr e_<pmnor> rms uncertainty on <pmnor> 72- 75 F4.2 c b<pmnor> Superluminal apparent speed for <pmnor> 77- 80 F4.2 c e_b<pmnor> rms uncertainty on b<pmnor>
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 11-Jan-2008
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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