Catherine M. Cress, David J. Helfand
Department of Astronomy, Columbia University, 538 West 120th Street, New York, NY 10027
Robert H. Becker
Department of Physics, University of California, Davis, CA 95616 and
Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94450
Michael D. Gregg
Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94450
Richard L. White
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218
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The FIRST (Faint Images of the Radio Sky at Twenty Centimeters) survey
now covers 1550 
of sky where 
and
. This
yields a catalog of 138,665 sources above the survey threshold of 1 mJy,
about one third of which are in double-lobed and multi-component sources.
We have used these data to obtain the first high-significance measurement
of the two-point angular correlation for a deep radio sample.
We find that the correlation
function between 
and 
is
well fitted by a power law of the form
where 
and 
.
On small scales (
), double and multi-component sources
are shown to have a larger clustering amplitude
than that of the whole sample. Sources with flux densities
below 2 mJy are found to have a shallower slope than that obtained
for the whole sample, consistent with there being a significant
contribution from starbursting galaxies at these faint fluxes.
The cross-correlation of
radio sources and Abell clusters is determined. A preliminary
approach to inferring spatial information is outlined.
FIRST Home Page