Quickstart

The package currently supports .FITS type images. To perform source finding, you can import the finder module:

from continunet.finder import Finder

Load your image file:

finder = Finder("<filepath>")

To produce a source catalogue and populate the Finder instance:

sources = finder.find()

To calculate the model map and residuals image as part of source finding, use Finder.find() with generate_maps=True:

sources = finder.find(generate_maps=True)
model_map = finder.model_map
residuals = finder.residuals

Alternatively, manually calculate model map and residual images using:

model_map = finder.get_model_map()
residuals = finder.get_residuals()

Useful available attributes of the Finder object:

finder.sources
finder.reconstructed_image
finder.segmentation_map
finder.model_map
finder.residuals
finder.raw_sources

Export the source catalogue using finder.export_sources as .csv by default, or .FITS by setting export_fits=True:

finder.export_sources("<filepath>", export_fits=<Boolean>)

Source parameters extracted are:

Parameter	Description
x_location_original	x coordinate of the source from the cutout used for inference
y_location_original	y coordinate of the source from the cutout used for inference
orientation	orientation of source ellipse in radians
major_axis	major axis of source ellipse
minor_axis	minor axis of source ellipse
flux_density_uncorrected	total intensity of the segmented source region before beam corrections applied
label	class label in predicted segmentation map
x_location	x coordinate of the source in the original input image dimensions
y_location	y coordinate of the source in the original input image dimensions
right_ascension	RA coordinate of the source in the original input image dimensions
declination	Dec coordinate of the source in the original input image dimensions
area	area of source ellipse
position_angle	position angle of source ellipse in degrees
correction_factor	correction factor applied to flux density measurement to account for undersampling of synthesised beam
flux_density	corrected flux density