Polarization Calibration Post-Pipeline in CASA: Pilot Implementation
Abstract
In this poster we present the pilot implementation of the scripted polarization calibration pipeline in the Common Astronomy Software Application (CASA). As implemented it is a stand-alone script for polarization calibration complementing the current CASA VLA (Very Large Array) pipeline. This pilot implementation currently takes the output of that CASA VLA pipeline in the form of calibration tables and applies calibrations for polarization. We begin by applying a broadband polarization model of the known polarization calibrators in the dataset and use it to derive the cross hand delay, polarization leakage, and the polarization position angle using the calibration tasks in CASA. Our pilot implementation was tested on the L and S Band datasets of the project VLA 18A-161 to produce a wide-band calibrated dataset from the standard pipeline output. The wide fractional bandwidths at cm wavelengths make the VLA an ideal instrument for studying cosmic magnetic fields through wide-band polarimetry and rotation measure synthesis. Our pilot implementation of the polarization calibration pipeline removes the excess time radio astronomers will spend on calibrating their data.
- Publication:
-
American Astronomical Society Meeting Abstracts #233
- Pub Date:
- January 2019
- Bibcode:
- 2019AAS...23338107K