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Saoimage ds9 image reduction7/5/2023 The image will be saved compressed on your local disk.Ī FITS viewer will be started on your computer to display the image.Ī GIF viewer will be started on your computer to display the image. The image will be saved on your local disk. Summary of DSS output options Download as FITS file with WCS keywords Then, to use Sk圜AT as a viewer for FITS files please add the following line to your $HOME/.mailcap file: application/x-fits skycat %s or similarly in your browser configuration. If you want to use thisįeature you need to make sure that Sk圜at is installed in your system. via ab pixel ranges obtained via DS9, as per the IRAF format: xa, xb. Of the world coordinates (WCS) keywords present in our DSS images and displays celestial coordinates at each cursor position. are done in the Image Reduction and Analysis Facility (IRAF) software (Tody 1993). FITS is the standard astronomical data interchange format. We can reduce the number of cosmic rays detected as sources by enabling TweakReg to use DQ flags associated with image pixels. mailcap file, or to configure your browser, to map the application/x-fits type to a FITS You might have to configure the global or personal to SAOImage DS9 Live mouse pointer photometer Sky orientation of image and. Types which can be used on your side to launch an appropriate application. Although AIJ maintains the general purpose image processing capabilities of. To see the images, software from SAOImage called DS9 is recommended. Images from the DSS2 are bigger, because the pixel size is smaller.įor image display, we use some MIME (Multi Purpose Internet Mail Extensions) field2, reducing the data, and producing an image of a part of the observed field. There's a limit of around 4 MB for the largest image to beĭelivered. ![]() Given that the pixel scale for DSS1 is ~1.7 arcsec, and for DSS2 ~1 arcsec,įITS and GIF are 260kB, 110kB and 70 kB respectively for a field of 10*10Īrc minutes. A complete software for TF imaging data reduction, described in Jones, Shopbell &. In such case the user's input is reset to 1.5 * 1.5 pixels. You cannot request images bigger than 14400 square arcmin.Īlso, the cutout generating software does not support requests for images of size smaller than 0.5 pixels in one direction (X or Y)Īnd 1.5 pixels in the other one (Y or X) Output Options of the Online DSS at ESO/ST-ECF OutputĪt ESO/ST-ECF are delivered in two formats: FITS and GIF.įurthermore you can choose to display the images directly instead of first
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