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Date and Time of the Query: 2019-06-26 T15:18:48 PDT
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For refcode 2001MNRAS.328..623S:
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Copyright by Royal Astronomical Society. 2001MNRAS.328..623S A circular statistical method for extracting rotation measures S. Sarala and Pankaj Jain Accepted 2001 August 8. Received 2001 June 20; in original form 2000 August 1 ABSTRACT We propose a new method for the extraction of rotation measures from spectral polarization data. The method is based on maximum likelihood analysis and takes into account the circular nature of the polarization data. The method is unbiased and statistically more efficient than the standard {chi}^2^ procedure. We also find that the method is computationally much more convenient than the standard {chi}^2^ procedure if the number of data points is very large. We find that for most sources the method gives results very close to the standard {chi}^2^ minimization procedure. We give results for all the cases for which the method gives significantly different results from {chi}^2^ minimization. We also make a {lambda}^3^ fit to the data in order to extract non-Faraday rotation behaviour for those sources for which a large number of data points are available. Keywords: polarization - methods: data analysis - methods: statistical - galaxies: magnetic fields.
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