AIP4Win (Astronomical Image Processing for Windows) is a software package that comes with the Handbook of Astronomical Image Processing (Berry & Burnell), which used to be sold by Willmann-Bell Inc. 

AIP4Win contains functions for stellar photometry and can generate reports in the AAVSO Extended File Format (EFF) or CBA format. Peranso provides direct support for both formats, allowing you to import AIP4Win 2.x photometry results either as AAVSO EFF files, or as CBA files. 

AIP4Win 2.x is available for free and posted in the Files section of

To open an AIP4Win AAVSO EFF or CBA file, proceed as follows:

  1. Select Open in the File menu (or click on in the Desktop Toolbar) to display the File Open box. 

  1. Navigate to the Peranso folder, which contains the AIP4Win text file. If you don't see the file in the file selector, make sure that the file type selector in the lower right corner of the file selector either shows All files (*.*) or AIP4Win2 (*.txt). Select the file and click the Open button. 

  2. This loads the contents of the file and creates an Observations Window (ObsWin).