casa6
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// 1) alpha for linear pol fraction i.e make sure that Q and U is such that sqrt(Q_0^2+U_0^2)/I_0 * (nu/nu_0)^alpha(1)) is obeyed.//# SpectralIndex.h: Models the spectral variation with a spectral index//# Copyright (C) 1998-2014//# Associated Universities, Inc. Washington DC, USA.//#//# This library is free software; you can redistribute it and/or modify it//# under the terms of the GNU Library General Public License as published by//# the Free Software Foundation; either version 2 of the License, or (at your//# option) any later version.//#//# This library is distributed in the hope that it will be useful, but WITHOUT//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public//# License for more details.//#//# You should have received a copy of the GNU Library General Public License//# along with this library; if not, write to the Free Software Foundation,//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.//#//# Correspondence concerning AIPS++ should be addressed as follows://# Internet email: aips2-request@nrao.edu.//# Postal address: AIPS++ Project Office//# National Radio Astronomy Observatory//# 520 Edgemont Road//# Charlottesville, VA 22903-2475 USA//#//# $Id: SpectralIndex.h 21229 2012-04-02 12:00:20Z gervandiepen $namespace casacore{class MFrequency;class RecordInterface;class String;}namespace casa { //# NAMESPACE CASA - BEGIN// <summary>Models the spectral variation with a spectral index</summary>// <use visibility=export>// <reviewed reviewer="" date="yyyy/mm/dd" tests="tSpectralIndex" demos="dSpectralModel">// </reviewed>// <prerequisite>// <li> <linkto class="SpectralModel">SpectralModel</linkto>// </prerequisite>//// <synopsis>// This class models the spectral variation of a component with a spectral// index.// This class like the other spectral models becomes more useful when used