![]() ![]() Regions may also be used for presentation purposes. In CIAO 3.3, basic support was added for version 4 of the ds9 region files, which have a slightly different format than the version 3 files. Regions provide a means for marking particular areas of an image for further analysis. Developed independently of the software, ds9 contains some CIAO-specific support. It supports FITS images and binary tables, multiple frame buffers, region manipulation, and many scale. The imaging application SAOImage ds9 is distributed with CIAO as the default imager. DS9 inherited TNG's support of regions, XPA, external analysis support, and the general GUI. Joye Abstract SAOImage DS9 is an astronomical imaging and data visualization application. Basically, all the real work is done in C++. A number of Tk Canvas widgets in C++ were created to support all the functionality needed. For example, SAOImage DS9 is an astronomical data visualization. Like I said, have a quick read round, there's plenty of introduction to aperture photometry stuff out there :)Īlso as a side note, when you are all up speed have a look at PyRAF - its IRAF within python, which, unlike default IRAF, doesn't randomly break for no good reason. The GUI is implemented as a very thin layer of Tk. The (x y) location of the charge image accurately mimics the location of the arriving. You'd still need to do flat fielding, bias subtraction (maybe remove dark frames if it's long exposure or infrared images) as well as measuring the flux relative to other stars in the image. You can do a quick and dirty look at the flux by using the regions analysis or region statistics feature (I can't remember the exact name) but this is NOT the flux of the star. To directly answer your question, no there is no feature within DS9 that can accurately give you the flux of your object. ![]() the best guess of the image coordinates in the imaging software, SAOImage DS9. I'd suggesting taking a quick step back to read up the the process of aperture photometry before diving straight into DS9/IRAF. of the individual quasar images via two-dimensional image fitting and. The process itself is not overly complex but it is a bit of a learned skill. This is usually done by selection a number of comparison stars to measure against. The imaging application SAOImage ds9 is distributed with CIAO as the default imager. This is the process of measuring the brightness of a star by placing a small aperture around the star and measuring the pixel counts inside that aperture as well as standardising it the background level of the image. The process you're trying to do is called aperture photometry. To directly answer your question, no there is no feature within DS9 that can accurately give you the flux of your object. ![]()
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