CDROM/APJS/V99/P297 First Caltech-Jodrell Bank VLBI Survey. III (Xu+ 1995) ================================================================================ The First Caltech-Jodrell Bank VLBI Survey. III. VLBI and Merlin Observations at 5 GHz and VLA Observations at 1.4 GHz W. Xu, A. C. S. Readhead, T. J. Pearson, A. G. Polatidis, & P. N. Wilkinson <1995, ApJS, 99, 297> =1995ApJS...99..297X ================================================================================ Abstract: We present the 5 GHz results from the first Caltech-Jodrell Bank (CJ1) VLBI survey. The 1.6 GHz maps were presented in two separate papers (Polatidis et al. 1995; Thakkar et al. 1995). These three papers complete the first stage of this program to map at both 1.6 and 5 GHz all objects accessible to Mark II VLBI in the complete sample of 135 objects with 1.3 > S_(5 Ghz) >= 0.7 Jy, Dec(1950) >= 35 deg, and |b| > 10 deg. The combination of the CJ1 sample with the Pearson-Readhead (PR) sample provides a complete, flux density-limited sample of 200 objects with S_(5 GHz) >= 0.7 Jy, Dec(1950) >= 35 deg, |b| > 10 deg for which all of the objects accessible to Mark II VLBI have been mapped at both 5 GHz (129 objects) and 1.6 GHz (132 objects). In addition to the 5 GHz VLBI maps, we present in this paper 5 GHz MERLIN observations of 20 objects and 1.4 GHz VLA observations of 92 objects in the combined CJ1 + PR sample. The VLA maps, together with L-band (1.3-1.7 GHz) maps available in the literature, provide a complete set of VLA maps for the combined CJ1 + PR sample. Finally, we present the radio spectra of the objects in the CJ1 sample. The combined CJ1 + PR VLBI surveys provide a sample which is large enough for a number of important astrophysical and cosmological studies. These will be presented in further papers in this series. Keywords: quasars: general -- radio continuum: galaxies -- surveys File Summary: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- table2.dat 75 88 VLBI map parameters table3.dat 64 293 Gaussian models table4.dat 49 23 MERLIN map parameters table5.dat 43 94 VLA map parameters figure2 . . Directory of FITS images for Figure 2 The 5 Ghz VLBI maps of 84 objects figure4 . . Directory of FITS images for Figure 4 The 5 GHz MERLIN uniformly weighted maps of 20 objects figure6 . . Directory of FITS images for Figure 6 The 1.4 GHz VLA maps of 64 objects with extended structure -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 A8 --- Source B1950 source name, IAU convention 9 1X --- --- Blank 10-17 A8 --- Date Date of the VLBI observations. 18 1X --- --- Blank 19-21 A3 --- Sample VLBI sample (CJ1 or PR) the source belongs to 22-27 F6.2 mas anat []? FWHM of major axis of the restoring beam 28-33 F6.2 mas bnat []? FWHM of minor axis of the restoring beam 34-38 I5 deg PAnat []? Position angle of major axis, N thru E 39-43 I5 mJy/beam Snat []? Peak flux density, naturally weighted map 44-48 F5.2 mJy/beam Snat_rms []? Off source rms, naturally weighted map 49-54 F6.2 mas atap []? FWHM of major axis of tapered map restoring beam 55-60 F6.2 mas btap []? FWHM of minor axis of tapered map restoring beam 61-65 I5 deg PAtap []? Position angle of major axis, N thru E 66-70 I5 mJy/beam Stap []? Peak flux density, tapered map 71-75 F5.2 mJy/beam Stap_rms []? Off source rms, tapered map -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 A8 --- Source *B1950 source name according to IAU convention 9-14 F6.3 Jy S Flux density of component 15-21 F7.2 mas r *Radius of component 22-28 F7.1 deg Theta *Angle to component 29-34 F6.2 mas a FWHM of major axis of component 35-39 F5.2 --- ba Axial ratio of major to minor axis, b/a 40-46 F7.1 deg Phi Position angle of major axis, north thru east 47-52 F6.3 --- AF_Amp []? Amplitude agreement factor 53-58 F6.3 --- AF_CP []? Closure Phase agreement factor 59-64 F6.3 --- AF_Tot []? Total agreement factor -------------------------------------------------------------------------------- Notes for file: table3.dat -------------------------------------------------------------------------------- Source: If this field is blank, the other fields are continuations of the previous record r: Radius of component, measured from position of the first component Theta: Angle to component measured north through east from the position of the first component -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 A8 --- Source Source name 9-11 3X --- --- Blank 12-14 A3 --- Sample Sample, CJ1 or PR 15-22 F8.1 mas a Beam FWHM major axis 23-29 F7.1 mas b Beam FWHM minor axis 30-35 I6 deg Theta Beam major axis position angle 36-42 I7 mJy/beam Speak Peak intensity 43-49 F7.2 mJy/beam Srms rms noise -------------------------------------------------------------------------------- Byte-by-byte Description of file: table5.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 A8 --- Source Source name 9-11 3X --- --- Blank 12-14 A3 --- Sample Sample, CJ1 or PR 15-23 F9.1 mJy/beam Speak Peak intensity 24-32 F9.2 mJy/beam Srms rms noise 33-39 7X --- --- Blank 40-43 A4 --- Struct *Structure -------------------------------------------------------------------------------- Notes for file: table5.dat -------------------------------------------------------------------------------- Struct: Structure: U - unresolved E - extended structure detected E? - hint of extended structure Note flag: a Faint component ~ 12" to the north b Faint component ~ 1' to the west c Logarithmic contour levels in steps of 2^{1/2} d Convolved with 3" circular Gaussian beam e Convolved with 5" circular Gaussian beam f The lowest contour in 2 sigma g The lowest contour is 4 sigma h Source resolved at long baselines -------------------------------------------------------------------------------- ================================================================================ (End) Lee Brotzman [ADS] 29-Aug-95