Summary of a FITS file

1. Index : Extension number (0 is Primary Image)
2. Extension: Name of the extension.
3. Type : Type of the extension.
   • Binary -- Binary table extension.
   • ASCII -- ASCII table extension.
   • Image -- Primary array or Image extension.
4. Dimension: Size of each extension.
5. View :
   • Header -- Display/Edit header.
   • Hist -- Displays a histogram image of 1 or 2 columns in a table
   • Image/Plot -- Display image or plot table column values. The default image display device (POW or ds9) may be selected under the Edit->Preferences->Graphs menu item.
   • Table -- Display a table. (If the extension is an image, then numerical values of the image are displayed as a table).

     All - displays all the columns in a table
     Select - allows the user to select which columns to display.

   By clicking each button, users are allowed to display and edit the FITS file.

Menus

• File
  • New File...: Create a new FITS file.
  • Open File...: Open another FITS file. See File Selection for details.
  • Save: Save any changes to the original file.
  • Save As...: Save file (with modifications) to a new file.
  • Export HDUs...: Save the selected HDUs into a new file.
  • Make HDU Listing...: Save Extension Name, Type and Dimension in an ASCII file.
  • Revert: Throw away any unsaved modifications and reopen the last-saved version of the file.
  • Close: Close the current Summary window and the opened file. If file has been modified, you will be given the opportunity to save the file before closing.
  • Quit: Quit fv. If any open file has been modified, you will be given the opportunity to save it before exitting.
• Edit
  • Undo: Not support in summary windows.
  • Cut HDUs: Delete the selected HDUs. The deleted HDUs go to the clipboard.
  • Copy HDUs: Copy the selected HDUs to the clipboard. Only one item (could be a list of HDUs though, as long as multiple HDUs are cut/copied at once from a file) is kept in the clipboard.
  • Paste HDUs: All the HDUs in the clipboard are appended to the current file.
  • Clear: Not supported in summary windows.
  • Clipboard: Show the contents of the clipboard.
  • New Extension: A new empty extension will be appended to the current file. You can select whether to append an image, ascii table, or binary table.
  • Preferences: Bring up a window from which fv's behavior and appearance can be modified. See the Preferences help file for details.
• Tools
  • Plot : Plot all the selected valid HDUs(images and tables).
  • Smooth Images: Smooth all the selected image HDUs. The two parameters, width and the height of the smoothing box, will be entered by users.
  • SkyView: Retrieve images of sky at all wavelengths (from Radio to Gamma-Ray) from the NASA SkyView server.
  • Catalog: Retrieve a list of objects in a region of sky from selected catalogs at the NASA SkyView server.
  • VizieR: Retrieve a list of objects in a region of sky from selected catalogs at the Strasbourg VizieR web site.
  • Run Ftool: Run a Ftool program if the HEASOFT or FTOOL packages are installed.
  • Help: A listing of all available help files.

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