The beamformer and correlator for the Large European Array for Pulsars
2017
The Large European Array for
Pulsarscombines Europe’s largest
radio telescopesto form a tied-array
telescopethat provides high signal-to-noise observations of
millisecond pulsars(MSPs) with the objective to increase the sensitivity of detecting low-frequency gravitational waves. As part of this endeavor we have developed a software correlator and beamformer which enables the formation of a tied-array beam from the raw voltages from each of
telescopes. We explain the concepts and techniques involved in the process of adding the raw voltages coherently. We further present the software processing pipeline that is specifically designed to deal with data from widely spaced, inhomogeneous
radio telescopesand describe the steps involved in preparing, correlating and creating the tied-array beam. This includes polarization calibration, bandpass correction, frequency dependent phase correction, interference mitigation and
pulsargating. A link is provided where the software can be obtained.
Keywords:
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Correction
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