PCA Tomography
Tomogram 3 and eigenspectrum 3 obtained with the PCA Tomography applied to the datacube of the central region of the galaxy NGC 4736. They show the rotation map of the central region of the galaxy.
The PCA Tomography is a technique, recently developed by us, for extracting information from datacubes. It consists in applying the efficient statistical tool known as Principal Component Analysis (PCA) in datacubes. The pipeline containing the main steps of the procedure and the necessary scripts (writen for IDL) for executing these steps can be found in the links below. All the scripts have a corresponding HELP file (in pdf). It's important to mention that the pipeline and the scripts aren't only related to the PCA Tomography itself. Other procedures like correction of the differential atmospheric refraction, lucy deconvolution, etc are all part of the pipeline and are very important to the PCA Tomography work satisfactory.
A description of this technique can be found in Steiner et al. 2009, MNRAS, 395, 64S.
The programs pack for IDL can be found here
The scripts of the programs pack have not been entirely tested yet, so there may be bugs. If you find any problems or if you have doubts about the procedure or about the use of the scripts, please contact us:
robertobm@astro.iag.usp.br
