| 21st of January 2015 |
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| Looking for HI in galaxies? Here is what you need! |
| by Paolo Serra (ATNF/CASS), Tobias Westmeier (UWA/ICRAR), et al. |
| Studying HI in galaxies can be challenging
in a number of different ways. You'll need to get your data, remove the
ever-annoying RFI, obtain a good calibration and make the HI cubes. At the
end of this all you'll still need to detect the HI - and this can be quite
tricky. Well, SoFiA is there to help you! SoFiA is a flexible source-finder for 3D spectral line data. It can be used on any cube (not just HI), and offers a number of different algorithms to: search for line emission on multiple scales; estimate the reliability of individual detections; look for signal in arbitrarily large cubes using a catalogue of coordinates as a prior; provide a wide range of source parameters and output products. And it comes with a beautiful GUI, too! SoFiA is described in Serra et al. (2015, MNRAS, in press - arXiv:1501.03906) and is registered at the Astrophysics Source Code Library with ID ascl:1412.001. You can download SoFiA here. |
| Credits: WALLABY source-finding group |