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  1. harvard.edu
    https://cxc.cfa.harvard.edu › ciao › threads

    Using SAOImage ds9 - CIAO 4.17 - Harvard University

    Jan 13, 2022 · The next time ds9 is started, this file is read and the preferences are used. Important: as mentioned before, the preference files are generally not backward-compatible. …

  2. harvard.edu
    https://cxc.cfa.harvard.edu › ciao › guides › youtube.html

    Analysis Guide: Video Demos and Tutorials - CIAO 4.17 - Harvard …

    Nov 1, 2024 · The ds9 catalog tool allows users to annotate their images with markers for sources from many different catalogs (including the Chandra Source Catalog and users own source …

  3. harvard.edu
    https://cxc.cfa.harvard.edu › ciao › visualization

    CIAO: Visualization - CIAO 4.17 - Harvard University

    Dec 10, 2024 · CIAO 4.17 comes with version 8.6 of SAOImage DS9, which can be used to visualize images, event files, and even tabular data (this replaces the prism tool from CIAO …

  4. harvard.edu
    https://cxc.cfa.harvard.edu › obsvis

    ObsVis: Chandra Observation Visualizer - ObsVis - Harvard University

    Dec 11, 2024 · ObsVis is a tool to aid in observation planning which allows the inspection of sky images with overlaid instrument fields-of-view (FoV). ObsVis interfaces with the SAOimage …

  5. harvard.edu
    https://cxc.cfa.harvard.edu › ciao › guides › quick_start.html

    Quick Start Guide - CIAO 4.17 - Harvard University

    Dec 19, 2024 · There are multiple ways to perform tasks in ds9, including through the GUI, on the command line, via XPA or SAMP, and even through HTML For additional details see the True …

  6. harvard.edu
    https://cxc.cfa.harvard.edu › ciao › intro

    Introduction - CIAO 4.17 - Harvard University

    Nov 4, 2024 · We begin by loading the event file into the image viewer, ds9. unix% ds9 acisf00214N003_evt2.fits & Then we select regions to contain most of the source emission, …

  7. harvard.edu
    https://cxc.cfa.harvard.edu › ciao › threads › aprates

    Compute Net Counts, Rate, or Flux for Point Sources

    Jan 13, 2022 · The ds9 command-line options are used to display them on the data, as shown in Figure 1. unix% ds9 acisf00313_000N001_r0001_regevt3.fits -region …

  8. harvard.edu
    https://cxc.cfa.harvard.edu › ciao › threads › imag.html

    Imaging Threads - CIAO 4.17 - Harvard University

    Apr 15, 2025 · The Imaging threads cover a wide range of topics that include source detection, creating exposure maps and normalized images, and calculating image statistics.

  9. harvard.edu
    https://cxc.cfa.harvard.edu › ciao › threads › group_regions

    Creating Source and Background Files - CIAO 4.17 - Harvard …

    Jan 24, 2022 · After choosing "OK" in the region filename dialog, a format dialog is opened. Set the format to "ds9" and the coordinate system to "Physical". Note that in this case the region …

  10. harvard.edu
    https://cxc.cfa.harvard.edu › ciao › threads › detect_output

    Using the Output of Detect Tools - CIAO 4.17 - Harvard University

    Feb 17, 2022 · In ds9: load the event file and display the source list on top of it. To save the regions in another format: Region → Save Regions... → Save As "acisf02254_src_ds9.reg". …

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