Siril supports calibration, stacking, background and noise removal, scripting, and many more features. Although it loads all the major general-purpose image and video file formats, it internally works with FITS, the leading format for astronomical images and data. Siril is an advanced image processing app. Siril (left) and DS9 (right) for Linux running in Crostini on my Chromebox. deb files from the Chrome OS Files app or the Terminal. There are two good such Linux apps that work fine on my Chromebox in Crostini, Siril and SAOImage DS9. The workflow for producing images of the sky is best achieved with specialized astronomical image viewing and processing software. Note: many times there are more options under the tabs at the top then using the buttons with the same name.I got a Pixel 4 XL for its unique astrophotography features, along with a tripod for long-exposure photography with the phone. You can then move and alter the region and the spectrum will be automatically updated. Then a spectrum of the region should be displayed in another new window. Under the ‘Analysis’ tab on the new window, you can select ‘Plot 3D’. Then double click on the region and a new window should pop up giving some basic parameters of the region. To draw a region, go to ‘edit’ then click on ‘region’, this will allow you to draw a region, like a circle on the image. If you would like to view the spectrum at a given position, you can click and drag on the ds9 window to draw a circle over the region of interest. minimum and maximum values), right click with your mouse and move the cursor back and forth. Also you can change the zoom and scale by selecting the appropriate buttons. You can adjust the speed of the movie, or pause it when you want to look in more detail at a particular slice. This can be very useful to give you a first impression of a datacube, and see where for example emission lines appear. When opening a datacube in ds9, you will be able to play a movie (should be a pop-up window), stepping in wavelength slices through the cube. An overview of the various extensions of the MaNGA datacube format is given in its data model. Note that you may have to click the ‘Options’ button within the open file dialog box in order to enable opening the gzipped MaNGA FITS files (since ds9 does not give you the option to open these by default). If you want to look at other extensions, you will need to add the extension name to the end of your ds9 command, e.g., ds9 &Īlternatively, you can also open MaNGA data cubes from within the DS9 application by choosing File -> Open As -> Multiple Extension Frames (which will open all extensions of the data cube at once). This command will open the first extension (‘FLUX’) by default. Opening a datacube in ds9 can be done by typing the following into your terminal: ds9 & If you want to do more advanced analysis, look at the Marvin, IDL or python sections. Keep in mind that ds9 will allow you to look at the data, but not really analyze the data in detail. This is a common astronomy software package that can be downloaded here and is also a package in astroconda. One of the simplest ways to quickly visualize a MaNGA datacube is to use ds9. You can download this galaxy yourself with the following rsync command in your terminal: rsync -avz rsync:///dr17/manga/spectro/redux/v3_1_1/7443/stack/ Spectra eBOSS, SPIDERS, TDSS, BOSS, SEGUE, SDSS-I/II
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