This was discussed in a little more detail in our Data Reduction pages. See here for more info. The publicly-available software, QFitsView , by Thomas Ott, offers a powerful way to explore spectroscopic datacubes and even perform on-the-fly analyses like spectral stacking, emission line fitting, and velocity map generation. Notify administrators if there is objectionable content in this page. Instruments Observing Techniques Data Reduction
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The spaxels necessarily need to be square and probably also contiguous, or rather if they are not, it will be assumed that they are. Its documentation seems pretty good; the need for good documentation is often overlooked! Change the name also URL address, possibly the category of the page. If you want to discuss contents of this page – this is the easiest way to do it. Click here to edit contents of this page.
qfitsview : Artful () : Ubuntu
Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3. More detailed documentation is available from the QFitsView Documentation page.
The position table should have been provided by the observatory from where you got your data although qfitsgiew always in a very friendly formatand it is a listing of the sky position usually relative of each of the spectra. See Chapter 7 of the User Reference and Cookbook for more info.
Download QFitsView BETA
It was designed as a plug-in application of the Aladin VO application. Home What is IFS? Aladin Aladin now supports cube visualisation, with a suite of tools and options. You should also look at the P3D softwarewhich is more a qfitsvlew reduction package but is geographically linked to E3D it was also developed at the AIP.
This is a very useful ‘quick look’ function. Note also that the VIMOS pipeline product cubes need to be reformatted in order to be viewed with this tool. With the spectral display locked, zoom in to a qfitsvoew feature of interest, e.
In order to work the “E3D” FITS headers have to be in the input file, so that the organisation of the spaxels is known i. Our recommendation is that you ask the maintainers of the vistool to help with the installation if you cannot get it working right away, because once it is working you will find it a very useful tool indeed.
Copyright Sloan Digital Sky Survey. The image clipping setting default: It is fairly simple, really, to write a qfitsviiew that will allow you to look at what your data have, but far more useful is to use a ready-written GUI and we list here those we have knowledge of. You can also choose to display the average or median.
FITS file viewer based on DPUSER
qgitsview QFitsView will display the sum of all spectra falling within the defined aperture by default. Immediately after your data reduction it is useful to explore your data before starting the analysis. With this you can take wavelength slices along your spectra thus producing a list of flux values versus spectral number and rearrange into an image.
It can carry out numerous basic analysis operations.
Append content without editing the whole page source. Right-click on the mouse to get a menu option to zoom out to the entire spectrum.
QFitsView 4 BETA
RSS format The cube format is much easier to work with because all the hard work of relating individual spectra to a spatial position has been done, but not all IFS data lend themselves immediately to being a cube format. PINGSoft This is a package that the wiki maintainers qfitsvjew not yet used, but from its own website it looks like a very handy visualisation and basic analysis tool.
Instead of displaying the spectrum from the single spaxel underneath the mouse, you can also select circular filled and annular apertures with user-defined sizes.
Some are quick-look, designed to allow you to see what is going on with your data, others allow for more interactivity e. Watch headings for an “edit” link when available. Find out what you can do.
The sum of flux in the defined line region, minus the average value from the continuum regions, is then displayed in the image viewing panel.