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 gcsurvey_gbt_paperrevised2.tex ApJS, July 2008 , in press
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%astro-ph/08014294
\documentclass[12pt, preprint]{aastex}
\begin{document}

\title{GBT Multiwavelength Survey of the Galactic Center Region}
\author{C. J. Law\altaffilmark{1,2}, F. Yusef-Zadeh\altaffilmark{1}, W. D.
\altaffiltext{1}{Department of Physics and Astronomy, Northwestern
University, 2145 Sheriadan Road, Evanston, 60208 IL, USA;
claw@science.uva.nl}
\altaffiltext{2}{Astronomical Institute ``Anton Pannekoek'', University of
Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, Netherlands}
\altaffiltext{3}{National Radio Astronomy Observatory, 520 Edgemont Road,
Charlottesville, VA 22903, USA}
\altaffiltext{4}{National Radio Astronomy Observatory, P.O. Box 2, Rt.
28/92, Green Bank, WV 24944, USA}

We describe the results of a radio continuum survey of the central
4\sdeg$\times$1\sdeg\ with the 100 m Green Bank Telescope (GBT) at
wavelengths of 3.5, 6, 20, and 90 cm.  The 3.5 and 6 cm surveys are the most
sensitive and highest resolution single dish surveys made of the central
degrees of our Galaxy.  We present catalogs of compact and extended sources
in the central four degrees of our Galaxy, including detailed spectral index
studies of all sources.  The analysis covers star-forming regions such as
Sgr B and Sgr C where we find evidence of a mixture of thermal and
nonthermal emission.  The analysis quantifies the relative contribution of
thermal and nonthermal processes to the radio continuum flux density toward
the GC region.  In the central 4\sdeg$\times$1\sdeg\ of the GC, the thermal
and nonthermal flux fractions for all compact and diffuse sources are
28\%/72\% at 3.5 cm and 19\%/81\% at 6 cm.  The total flux densities from
these sources are $783\pm52$ Jy and $1063\pm93$ Jy at 3.5 and 6 cm,
respectively, excluding the contribution of Galactic synchrotron emission.
\end{abstract}

\keywords{Galaxy: center --- surveys --- radio continuum: general}

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%astro-ph/08014294<br>\documentclass[12pt, preprint]{aastex}<br>\begin{docu=
ment}<br><br>\title{GBT Multiwavelength Survey of the Galactic Center Regio=
n}<br>\author{C. J. Law\altaffilmark{1,2}, F. Yusef-Zadeh\altaffilmark{1}, =
\altaffiltext{1}{Department of Physics and Astronomy, Northwestern Universi=
ty, 2145 Sheriadan Road, Evanston, 60208 IL, USA;&nbsp; <a href=3D"mailto:c=
law@science.uva.nl">claw@science.uva.nl</a>}<br>\altaffiltext{2}{Astronomic=
al Institute ``Anton Pannekoek&#39;&#39;, University of Amsterdam, Kruislaa=
n 403, 1098 SJ Amsterdam, Netherlands}<br>
\altaffiltext{3}{National Radio Astronomy Observatory, 520 Edgemont Road, C=
harlottesville, VA 22903, USA}<br>\altaffiltext{4}{National Radio Astronomy=
 Observatory, P.O. Box 2, Rt. 28/92, Green Bank, WV 24944, USA}<br><br>
\begin{abstract}<br>We describe the results of a radio continuum survey of =
the central 4\sdeg$\times$1\sdeg\ with the 100 m Green Bank Telescope (GBT)=
 at wavelengths of 3.5, 6, 20, and 90 cm.&nbsp; The 3.5 and 6 cm surveys ar=
e the most sensitive and highest resolution single dish surveys made of the=
 central degrees of our Galaxy.&nbsp; We present catalogs of compact and ex=
tended sources in the central four degrees of our Galaxy, including detaile=
d spectral index studies of all sources.&nbsp; The analysis covers star-for=
ming regions such as Sgr B and Sgr C where we find evidence of a mixture of=
 thermal and nonthermal emission.&nbsp; The analysis quantifies the relativ=
e contribution of thermal and nonthermal processes to the radio continuum f=
lux density toward the GC region.&nbsp; In the central 4\sdeg$\times$1\sdeg=
\ of the GC, the thermal and nonthermal flux fractions for all compact and =
diffuse sources are 28\%/72\% at 3.5 cm and 19\%/81\% at 6 cm.&nbsp; The to=
tal flux densities from these sources are $783\pm52$ Jy and $1063\pm93$ Jy =
at 3.5 and 6 cm, respectively, excluding the contribution of Galactic synch=
rotron emission.<br>
\end{abstract}<br><br>\keywords{Galaxy: center --- surveys --- radio contin=
uum: general}<br><br>

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