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Next: Filling VLA data into AIPS++ Up: VLA reduction Previous: Summary of Data Reduction Steps

Example data and scripts

The two sample datasets used in the examples below are available from the AIPS++ Data Repository. The Data Repository is usually created in the directory /aips+ +/data/ when AIPS++ is installed on a UNIX or LINUX machine (check with your AIPS++ system administrator if the data are not here). You can create AIPS++ MeasurementSets from this data directly as described below using the ms tool.

The Glish sequences listed below describe calibration and imaging steps and are available as full end-to-end scripts in the AIPS++ Recipe Repository. Scripts in the Repository can be easily modified to reduce and image similar data.

The continuum polarimetry data set is a full-polarization, VLA A-configuration observation at 5 GHz (one spectral window) of the gravitational lens 0957+561. A nearby point-like calibrator (0917+624) has been observed alternately with the target source. 3C286 is used for both flux density scaling and instrumental polarization calibration. The Glish script is available here: continuum polarimetry.

The spectral-line dataset is a short VLA D-configuration observation of HI (redshifted to 1413 MHz) in NGC5921. This dataset was observed in total intensity only (RR & LL), with 63 channels in a single spectral window. A nearby phase calibrator (1445+099) was observed, as well as 3C286 for flux density calibration. The Glish script is available here: spectral line.

For clarity in distinguishing operations for each of the sample datasets, tools associated with the continuum polarimetry reduction have names ending in `C' (e.g. imgrC, calC), and those associated with the spectral-line reduction have names ending in `S' (e.g. imgrS, calS).

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