A complete sample of intermediate-strength radio sources selected from the GB/GB2 1400-MHz surveys. II - High-resolution maps and optical identifications of sources with very steep spectra

1982 ◽  
Vol 87 ◽  
pp. 1150 ◽  
Author(s):  
J. Machalski ◽  
J. Maslowski ◽  
J. J. Condon ◽  
M. A. Condon
Keyword(s):  
High Resolution ◽  
Radio Sources ◽  
Complete Sample ◽  
Optical Identifications

Spectra, optical identifications, and statistics of a complete sample of radio sources at declinations 10°–12°30′

2003 ◽  
Vol 47 (11) ◽  
pp. 903-915 ◽  
Author(s):  
A. G. Gorshkov ◽  
V. K. Konnikova ◽  
M. G. Mingaliev
Keyword(s):  
Radio Sources ◽  
Complete Sample ◽  
Optical Identifications

scholarly journals An Atlas of Extragalactic Radio Sources

1996 ◽  
Vol 175 ◽  
pp. 157-158 ◽  
Author(s):  
J.P. Leahy ◽  
A.H. Bridle ◽  
R.G. Strom
Keyword(s):  
High Resolution ◽  
Line Emission ◽  
Radio Sources ◽  
X Rays ◽  
Complete Sample ◽  
High Quality ◽  
Extragalactic Radio Sources ◽  
Optical Line

Our Atlas of Extragalactic Radio Sources will present high-quality images of the nearer half of “3CRR”, the sample defined by Laing, Riley & Longair (1983). This is the best-studied complete sample of extragalactic radio sources. All 173 members have secure redshifts and most have been imaged in the radio at high resolution. There is also copious information on their optical line emission, and many have been detected in the sub-mm, FIR, and in X-rays. 3CRR is widely used as a baseline against which fainter, higher-redshift samples can be compared to define the evolution of the population (e.g. Neeser et al. 1995; Law-Green, this conference).

scholarly journals A Systematic Study of IRAS Selected Proto-Planetary Nebula Candidates

1993 ◽  
Vol 155 ◽  
pp. 333-333
Author(s):  
J.Y. Hu ◽  
B.W. Jiang ◽  
T. De Jong ◽  
S. Slijkhuis
Keyword(s):  
High Resolution ◽  
Systematic Study ◽  
Planetary Nebula ◽  
Near Infrared ◽  
Complete Sample ◽  
Molecular Line ◽  
Optical Photometry ◽  
Ccd Imaging ◽  
Spectroscopic Observations ◽  
Optical Identifications

A complete sample of PPN candidates was selected mainly based on the IRAS colors(Hu et al.,1990). For total 62 unknown objects in the sample we have made 1. ground-based infrared astrometry; 2. optical identifications; 3. near infrared and optical photometry; 4. optical spectroscopic observations; 5. radio molecular line observations(OH maser and CO thermal lines); and 6. check the optical variations from historical plates. Some additional observations such as high resolution spectraoscopic, optical/NIR CCD imaging observations for particularly interested objects were also carried out.

Optical identifications of a complete sample of flat-spectrum radio sources

1978 ◽  
Vol 83 ◽  
pp. 1036 ◽  
Author(s):  
J. J. Condon ◽  
D. L. Jauncey ◽  
A. E. Wright
Keyword(s):  
Radio Sources ◽  
Complete Sample ◽  
Spectrum Radio ◽  
Optical Identifications

The CLASS Gravitational Lens Search

2005 ◽  
Vol 201 ◽  
pp. 443-444
Author(s):  
I. W. A. Browne ◽  
S. T. Myers
Keyword(s):  
High Resolution ◽  
Gravitational Lensing ◽  
Surface Brightness ◽  
Gravitational Lens ◽  
Radio Sources ◽  
Complete Sample ◽  
Spectrum Radio ◽  
Sky Survey ◽  
Morphological Criteria ◽  
Density Ratios

To exploit gravitational lensing for cosmology large, reliable and statistically complete surveys are required. With the Cosmic Lens All-Sky Survey (CLASS) we have set out to achieve these goals. We pre-select targets to be flat spectrum radio sources and map every source with the VLA at 200mas resolution. Candidates having multiple compact components with flux density ratios ≤10:1 and separation in the range 0.3 to 15 arcsec are followed up with high resolution MERLIN and VLBA observations, eliminating those candidates which do not match strictly defined surface brightness and morphological criteria. A complete sample of 11685 sources have been surveyed and nineteen lens systems have been found.

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