Published in "Internet Resources for Professional Astronomy", eds. M.R. Kidger, I. Pérez-Fournon & F. Sánchez, Cambridge University Press, 1999. astro-ph/9807346

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INTERNET RESOURCES FOR RADIO ASTRONOMY

Heinz Andernach


Depto. de Astronomía, IFUG, Universidad de Guanajuato, Guanajuato, C.P. 36000, Mexico
Email: heinz@astro.ugto.mx

Abstract. A subjective overview of Internet resources for radio-astronomical information is presented. Basic observing techniques and their implications for the interpretation of publicly available radio data are described, followed by a discussion of existing radio surveys, their level of optical identification, and nomenclature of radio sources. Various collections of source catalogues and databases for integrated radio source parameters are reviewed and compared, as well as the WWW interfaces to interrogate the current and ongoing large-area surveys. Links to radio observatories with archives of raw (uv-) data are presented, as well as services providing images, both of individual objects or extracts (``cutouts'') from large-scale surveys. While the emphasis is on radio continuum data, a brief list of sites providing spectral line data, and atomic or molecular information is included. The major radio telescopes and surveys under construction or planning are outlined. A summary is given of a search for previously unknown optically bright radio sources, as performed by the students as an exercise, using Internet resources only. Over 200 different links are mentioned and were verified, but despite the attempt to make this report up-to-date, it can only provide a snapshot of the current situation.

Table of Contents

INTRODUCTION

OBSERVING TECHNIQUES AND MAP INTERPRETATION
Single Dishes versus Interferometers
Special Techniques in Radio Interferometry
Mosaicing
Map Interpretation
Intercomparison of Different Observations and Pitfalls
Linear Polarisation of Radio Emission
Cross-Identification Strategies

RADIO CONTINUUM SURVEYS
Historical Evolution
Radio Source Nomenclature: The Good, the Bad and the Ugly
Major Radio Surveys
Surveys from Low to High Frequencies: Coverage and Content
Optical Identification Content
Galactic Plane Surveys and Galactic Sources
Modern Large-Scale Discrete Source Surveys: NVSS, FIRST, WENSS and SUMSS
The ``WENSS'' Survey at 325-350MHz
The ``NRAO VLA Sky Survey'' at 1.4GHz (NVSS)
The ``FIRST'' Survey at 1.4GHz
The ``SUMSS'' 843MHz Survey with ``MOST''

INTEGRATED SOURCE PARAMETERS ON THE WEB
The Evolution of Electronic Source Catalogues
Searching in Radio Catalogues: VizieR and CATS
Object Databases: NED, SIMBAD, and LEDA

MISCELLANEOUS DATABASES AND SURVEYS OF RADIO SOURCES
Clusters of Galaxies
VLBI and Astrometric Surveys
Gravitational Lens Surveys
Variable Sources and Monitoring Projects
Solar Radio Data

RAW DATA, SOFTWARE, IMAGES AND SPECTRAL LINE DATA
Radio Observatories and their Archives
Archives of Centimetre- and Metre-wave Telescopes/Arrays
Archives of (Very) Long Baseline Interferometers
Millimetre Telescopes and Arrays
Software for Radio Astronomy
Radio Images on the Internet
Images from Large-scale Surveys
Image Galleries of Individual Sources
Spectral Lines
Neutral Hydrogen (HI)
Molecular and Recombination Lines, and Pulsars

FINDING LITERATURE, ADDRESSES, AND PROPOSAL FORMS ON WWW
Relevant Literature on the Internet
Finding Radio Astronomers around the World
Proposing Observations with Radio Telescopes

THE NEAR AND FAR FUTURE OF RADIO SURVEYS AND TELESCOPES
Continuing or Planned Large-scale Surveys
Very Recent Medium-Deep Multi-Waveband Source Surveys
Extending the Frequency Range of the Radio Window
Spectral Line and Pulsar Surveys
CMB and Sunyaev-Zeldovich Effect
Radio Telescopes: Planned, under Construction or being Upgraded
Low and Intermediate Frequencies
Where the Action is: Millimetre Telescopes and Arrays
Space Projects
Nomenclature and Databases

SUMMARY OF PRACTICALS

CONCLUSIONS

REFERENCES

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