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J/AJ/136/159     Global 86GHz VLBI survey of compact radio sources  (Lee+, 2008)

A global 86 GHz VLBI survey of compact radio sources. Lee S.-S., Lobanov A.P., Krichbaum T.P., Witzel A., Zensus A., Bremer M., Greve A., Grewing M. <Astron. J., 136, 159-180 (2008)> =2008AJ....136..159L
ADC_Keywords: Surveys ; VLBI ; Radio sources Keywords: BL Lacertae objects: general - galaxies: active - galaxies: jets - quasars: general - radio continuum: galaxies - surveys Abstract: We present results from a large 86GHz global very long baseline interferometry (VLBI) survey of compact radio sources. The main goal of the survey is to increase by factors of 3-5 the total number of objects accessible for future 3mm VLBI imaging. The survey observations reach a baseline sensitivity of 0.1Jy and an image sensitivity of better than 10mJy/beam. A total of 127 compact radio sources have been observed. The observations have yielded images for 109 sources, extending the database of the sources imaged at 86GHz with VLBI observation by a factor of 5, and only six sources have not been detected. The remaining 12 objects have been detected but could not be imaged due to insufficient closure phase information. Description: The survey observations were conducted during three sessions of the Coordinated (global) Millimeter VLBI Array (CMVA/GMVA) on 2001 October, 2002 April and 2002 October. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 78 127 Source list table6.dat 79 123 Image parameters table7.dat 79 262 Model fit parameters of sources
See also: VII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 8 A8 --- IAU Source IAU identification 10- 18 A9 --- Name Common source name 20- 24 A5 --- Ep Observing epochs (G1) 26- 27 I2 h RAh Hour of Right Ascension (J2000) 29- 30 I2 min RAm Minute of Right Ascension (J2000) 32- 39 F8.5 s RAs Second of Right Ascension (J2000) 41 A1 --- DE- Sign of the Declination (J2000) 42- 43 I2 deg DEd Degree of Declination (J2000) 45- 46 I2 arcmin DEm Arcminute of Declination (J2000) 48- 54 F7.4 arcsec DEs Arcsecond of Declination (J2000) 56- 57 A2 --- St Detection status (2) 59- 63 F5.3 --- z ? Redshift from Veron-Cetty & Veron (2006, Cat VII/258) 65 A1 --- Type [BQGSU] Optical type from Veron-Cetty & Veron (2006, Cat VII/258) (3) 67- 70 F4.1 mag Vmag ? The V band magnitude from NED 72- 76 F5.2 Jy S86 ? Total 86GHz flux density (4) 78 A1 --- n_S86 [d] indicates a mean flux on multiple epochs
Note (2): Source status as follows: - = not detected + = detected +m = detected and only model fitted ++ = detected and imaged Note (3): Optical type code as follows: Q = quasar B = BL Lac object G = radio galaxy S = star U = unidentified Note (4): Obtained from pointing and calibration scan measurements made at Pico Veleta.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 8 A8 --- IAU Source IAU identification 10 A1 --- Ep Observing epoch (G1) 12- 16 F5.2 Jy S86 ? Total 86GHz flux density (2) 18- 21 F4.2 Jy SS Correlated flux density on shortest baseline 23- 26 F4.2 Jy e_SS Uncertainty in SS 28- 30 I3 --- BS Shortest baseline in units of Mλ (3.5km) 32- 35 F4.2 Jy SL Correlated flux density on longest baseline 37- 40 F4.2 Jy e_SL Uncertainty in SL 42- 45 I4 --- BL Longest baseline in units of Mλ (3.5km) 47- 50 I4 uas Ba Restoring beam major axis (in µarcsec) 52- 54 I3 uas Bb Restoring beam minor axis (in µarcsec) 56- 60 F5.1 deg BPA Restoring beam position angle 62- 65 I4 mJy Stot Total CLEAN model flux density 67- 70 I4 mJy Speak Peak flux density in units of mJy/beam 72- 74 I3 mJy sigma Off-source RMS in image in units of mJy/beam 76- 79 F4.2 --- q_sigma Quality of residual noise in image
Note (2): Obtained from pointing and calibration scan measurements made at Pico Veleta.
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 8 A8 --- IAU Source IAU identification (1) 10 A1 --- Ep Observing epoch (G1) 12- 15 I4 mJy Stot Model flux density 17- 20 I4 mJy e_Stot Uncertainty in STot 22- 25 I4 mJy Speak Component peak brightness in units of mJy/beam 27- 30 I4 mJy e_Speak Uncertainty in SPeak 32 A1 --- l_d Upper limit flag on d 33- 36 I4 uas d Component size, in µarcsec 38- 40 I3 uas e_d ? Uncertainty in d 42- 45 I4 uas r ? Component (jet) radius, in µarcsec 47- 49 I3 uas e_r ? Uncertainty in r 51- 56 F6.1 deg theta ? Position angle (jet) (2) 58- 61 F4.1 deg e_theta ? Uncertainty in theta 63 A1 --- l_Tb Lower limit flag on Tb 64- 72 F9.4 10+10K Tb Measured brightness temperature 74- 79 F6.3 10+10K e_Tb ? Uncertainty in Tb
Note (1): For sources with multiple components, parameters of the core component are followed by those of jet components. For sources observed at multiple epochs, individual epochs are marked. Note (2): the location of the jet component with respect to the core component.
Global notes: Note (G1): Observing epochs as follows: A = October 2001 B = April 2002 C = October 2002
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 16-Jan-2011
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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