Pacerman: Polarisation Angle CorrEcting Rotation Measure ANalysis

Details Pacerman: Polarisation Angle CorrEcting Rotation Measure ANalysis Pacerman: Polarisation Angle CorrEcting Rotation Measure ANalysis

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ascl.soft10011d&link_type=abstract

Astrophysics Source Code Library, record ascl:1110.011

Astronomy and Astrophysics

Astrophysics

Scientific paper

Pacerman, written in IDL, is a new method to calculate Faraday rotation measure maps from multi-frequency polarisation angle data. In order to solve the so called n-pi-ambiguity problem which arises from the observationally ambiguity of the polarisation angle which is only determined up to additions of n times pi, where n is an integer, we suggest using a global scheme. Instead of solving the n-pi-ambiguity for each data point independently, our algorithm, which we chose to call Pacerman solves the n-pi-ambiguity for a high signal-to-noise region "democratically'' and uses this information to assist computations in adjacent low signal-to-noise areas.

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