Data¶

Reference Catalogues¶

Throughout flint there are moments where externally defined reference source catalouges may be used. The expectation is that these are downloaded into a reference directory before workflows or CLI entrypoints are invoked.

To assist flint_catalogue download may be used to download the expected set of reference catalogues into a user specified location.

Utilities around catalogues

usage: flint_catalogues [-h] {download,list,verify} ...

Positional Arguments¶

mode

Possible choices: download, list, verify

Operation mode of flint_catalogue

Sub-commands¶

download¶

Download reference catalogues

flint_catalogues download [-h] reference_directory

Positional Arguments¶

reference_directory: The directory to save the reference catalogues to

list¶

List the known reference catalogues

flint_catalogues list [-h]

verify¶

Ensure the expected catalogues existing in the reference directory and are correctly formed

flint_catalogues verify [-h] reference_directory

Positional Arguments¶

reference_directory: Directory containing the known reference catalogues

The flint_catalogues download task will download a set of reference catalogues from ViZieR. The complete list of catalogues may be listed with flint_catalogues list. At present there is no mechanism to introduce additional reference catalogues in configuration file based way - they have to be described in source code with an additional flint.catalgue.Catalogue class definition.

See flint.catalogue.KNOWN_REFERENCE_CATALOGUES (in the source or through programmatically) should a new ViZieR catalogue need to be added.

Sky-model catalogues¶

The flint_skymodel command will attempt to create an in-field sky-model for a particular measurement set using existing source catalogues and an idealised primary beam response. Supported catalogues are those available through flint_catalogue download. Note this mode has not be thoroughly tested and may not be out-of-date relative to how the flint_flow_continuum_pipeline operates. In the near future this may be expanded.

If calibrating a bandpass (i.e. 1934-638) flint will use the packaged source model. At the moment this is only provided for calibrate.

About ASKAP Measurement Sets¶

Some of the innovative components of ASKAP and the yandasoft package have resulted in measurement sets that are not immediately inline with external tools. Measurement sets should first be processed with fixms. Be careful – most (all) flint tasks don’t currently do this automatically. Be aware, me hearty.