Spectralindex: Difference between revisions
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Created page with "'''Return to Analysis Utilities''' This page documents the '''spectralindex''' function of Python module analysisUtils. This function is designed to ..." |
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This function is designed to fit a power-law spectral index to the results output from casa's fluxscale task. Currently, it also requires the output from the listobs task to determine the center frequencies of each spectral window. It runs a brief Monte-Carlo series of fits to determine the uncertainty on the fitted slope on the basis of the error bars on each flux density. Finally, it produces a plot. Note: spectralIndex is a synonym for spectralindex. | This function is designed to fit a power-law spectral index to the results output from casa's fluxscale task. Currently, it also requires the output from the listobs task to determine the center frequencies of each spectral window. It runs a brief Monte-Carlo series of fits to determine the uncertainty on the fitted slope on the basis of the error bars on each flux density. Finally, it produces a plot. Note: spectralIndex is a synonym for spectralindex. | ||
Usage: | '''Usage:''' | ||
spectralIndex(filename, yfilename, source='', verbose=False, maxpoints=0, trials=2000, spw='', help=False) | <tt>spectralIndex(filename, yfilename, source='', verbose=False, maxpoints=0, trials=2000, spw='', help=False) </tt> | ||
filename: contains a listobs output file | filename: contains a listobs output file | ||
Revision as of 15:41, 7 March 2012
Return to Analysis Utilities
This page documents the spectralindex function of Python module analysisUtils.
This function is designed to fit a power-law spectral index to the results output from casa's fluxscale task. Currently, it also requires the output from the listobs task to determine the center frequencies of each spectral window. It runs a brief Monte-Carlo series of fits to determine the uncertainty on the fitted slope on the basis of the error bars on each flux density. Finally, it produces a plot. Note: spectralIndex is a synonym for spectralindex.
Usage:
spectralIndex(filename, yfilename, source=, verbose=False, maxpoints=0, trials=2000, spw=, help=False)
filename: contains a listobs output file yfilename: contains a fluxscale output file source: sourcename to choose from the (possibly) multi-source fluxscale file maxpoints: the maximum number of spws to select for the fit (0=no max) trials: number of Monte-Carlo fits to run to estimate the fit uncertainties spw: the spws to use, e.g. =all, '1~3,5,6~8'=[1,2,3,5,6,7,8]
