Below is a short summary of the tools developed by the Nordic ARC node. For more information and software download, please visit the ‘Software Tools’ Section on the Nordic ARC node webpages www.nordic-alma.se.

STACKER: Tool for source stacking in the visibility plane, which has several advantages compared to the image-based stacking (see Lindroos et al. 2015, MNRAS 446, 3502).

UVMULTIFIT: Advanced tool for visibility fitting. Complex source models can be implemented easily. It supports spectral-line mode, multi-frequency synthesis, W-term correction, possibility of efficient analysis of source variability, etc. Parallelized code for multi-core machines. (see Marti-Vidal et al. 2014, A&A 563, 136).

FAKEOBS: Fills already-existing datasets with model visibilities, computed from model images (or image cubes). Ideal for a robust comparison of observations with model predictions.

CLOSURES: Tool for performing a statistical study of the phase (and amplitude) closures in a dataset. Useful to identify problematic observations at an early stage of the data analysis.

APSYNSIM: An interactive simulator of Aperture Synthesis with a real-time response in its graphical interface. Advanced operations (like source deconvolution and antenna-gain corruption) can be performed. Ideal for teaching Interferometry.

CASAIRING: Tool for computing radial intensity profiles of sources in images (or image cubes).

CHANDRAFERMI: Tool to estimate magnetic-field properties of extended sources by applying the Chandrasekhar-Fermi equation (Chandrasekhar & ermi 1953, ApJ, 118, 113) to full-polarization images. This tool is being developed in collaboration with the German ALMA node in Bonn. 

Other Tools in Preparation

SPECSCAN: Tool for a self-consistent calibration and analysis of complete interferometric spectral scans.

MOVIECUBE: Tool to generate plots and animations of spectral-line full-polarization images (or image cubes).

Contact:

Dr. Matthias Maercker
Onsala Space Observatory, ALMA Regional Centre | Nordic
Chalmers Tekniska Högskola
SE-439 92 Onsala
Sweden
phone: +46 (0)31 772 5521