AstroReproject Module

The AstroReproject module implements image reprojection (resampling) methods for astronomical datasets. Specifically, the methods have been designed to reproject the spatial axes, (e.g., for plotting 2D images or 3D datacubes over 2D images). For example in the case of datacubes, the algorithm reprojects (the spatial celestial axes of) each slice of the data cube on the projection system of the reference data (treating each slice independently). However, overlaying two full 3D astronomical datasets also requires resampling of the velocity axes, which is not implemented in this module.

The AstroReproject module requires that the necessary WCS information is available and present in the fits header and that the two datasets have the same celestial system of reference (e.g., J2000/FK5).

Panels and their use

Additionally, the reprojection module is used in the AstroVolume GUI to create contours of datasets reprojected over another dataset.