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Millimeter-wave spectra and variability of bright, compact radio sourcesObservations at 2.7 mm and at 1.5 cm were used to study the millimeter spectra and variability of 176 bright, compact radio sources. More than 20 percent of the flat-spectrum sources, but none of the steep-spectrum sources, were seen to vary at 1.5 cm by at least 30 percent over ten months. This is consistent with the hypothesis that flat-spectrum sources are compact and possibly beamed, while steep-spectrum sources are not. These data can also be used to choose sources for VLBI observations and for calibration of millimeter-wave observations.
Document ID
19880032049
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Edelson, R. A.
(Owens Valley Radio Observatory, Pasadena, CA; Colorado, University Boulder, United States)
Date Acquired
August 13, 2013
Publication Date
November 1, 1987
Publication Information
Publication: Astronomical Journal
Volume: 94
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
88A19276
Funding Number(s)
CONTRACT_GRANT: JPL-957254
CONTRACT_GRANT: NSF AST-85-09822
CONTRACT_GRANT: NAS7-918
CONTRACT_GRANT: NSF AST-84-12473
Distribution Limits
Public
Copyright
Other

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