Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975aj.....80..923c&link_type=abstract
Astronomical Journal, vol. 80, Nov. 1975, p. 923-930.
Astronomy and Astrophysics
Astronomy
22
Astronomical Catalogs, Extragalactic Radio Sources, Pulsars, Radio Astronomy, Radio Interferometers, Supernova Remnants, Crab Nebula, Error Analysis, High Frequencies
Scientific paper
Observations made during a series of meter-wavelength very-long-baseline (VLBI) experiments conducted during 1971-1973 are reported. A wide variety of objects was observed, including many extragalactic sources known to have compact components, several strong pulsars (especially the Crab nebula pulsar), and a selection of supernova remnants. The experiments are discussed in detail, and tests made to check the consistency of the results are described. The measured correlated flux densities are presented for each source as a function of interferometer baseline and observing frequency. An assessment is made of the measurement errors and of the possibility of confusion within the interferometer beam. The results show that all sources except the pulsars, which are known to have intrinsically small sizes, are resolved on the longest baseline. We also conclude that no supernova remnants except the Crab nebula and Cassiopeia A gave evidence of compact components.
Broderick John J.
Clark Thomas A.
Erickson William C.
Hutton L. K.
Knowles Stephen H.
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