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Welcome to the IRAF Homepage! IRAF is the Image Reduction and Analysis Facility, a general purpose software system for the reduction and analysis of astronomical data. IRAF is written and supported by the IRAF programming group at the National Optical Astronomy Observatories (NOAO) in Tucson, Arizona. NOAO is operated by the Association of Universities for Research in Astronomy (AURA), Inc. under cooperative agreement with the National Science Foundation

IRAF V2.14 Now Available

    As of September 2007, NOAO has resumed development of IRAF on a limited scale, although primary responsibility for user support remains at the community IRAF.NET web site. IRAF V2.14 is a formalized version of the V2.13 releases previously made available by iraf.net. IRAF V2.14 distributions are now available from the archives at iraf.noao.edu for the initial PC-IRAF release. Highlights of changes in this release can be found in the README file. A key new feature is the support for Mac Intel and Cygwin platforms.

    IRAF V2.14 Distribution Files:

    Platform All Sources IRAF Binaries NOAO Binaries Install Guide Site Mgrs Guide README
    Mac (Intel) AS IB NB pciraf.ps.gz unixsmg.ps.gz README
    Mac (PPC) AS IB NB pciraf.ps.gz unixsmg.ps.gz README
    RedHat/Fedora AS IB NB pciraf.ps.gz unixsmg.ps.gz README
    Other Linux AS IB NB pciraf.ps.gz unixsmg.ps.gz README
    Cygwin (Windows XP) AS IB NB pciraf.ps.gz unixsmg.ps.gz README

    Critical Update (1/14/08) A crticial bug has been discovered in an IMIO interface routine that affects ALL tasks linked against V2.14. This bug causes bogus pixel values to be returned leading to corrupted images and/or unexplained system crashes. All users are strongly encouraged to re-install the IB and NB binary distributions with patched versions from the download area ASAP. Reinstalling the source distribution is NOT required (but does include the IMEDIT change mentioned below). We apologize for the oversight, please post problems or questions as they arise, see the README file addendum for details.

    Additional platforms will be added in subsequent patch releases. Release errata will be available from this site as soon as it is available.

    (Updated Dec 3, 2007)


IRAF Support at iraf.net

    Discussions have been underway for a while within NOAO regarding how best to balance the needs of internal projects, the iraf.net support activities, and new projects. The result is a mutual collaboration in which IRAF development is resuming within NOAO on a modest scale, and the community support and development activities at iraf.net will be encouraged and supported for those NOAO employees supporting the site.

    User support remains the primary responsibility of iraf.net. Users are encouraged to Register at that site post questions to the forums. These forums also serve as a searchable online archive of all email sent to the old iraf helpdesk.


Past Features:

What is it? How do I get it?

IRAF is the "Image Reduction and Analysis Facility". The main IRAF distribution includes a good selection of programs for general image processing and graphics, plus a large number of programs for the reduction and analysis of optical and IR astronomy data (the "noao" packages). Other external or layered packages are available for applications such as data acquisition or handling data from other observatories and wavelength regimes such as the Hubble Space Telescope (optical), EUVE (extreme ultra-violet), or ROSAT and AXAF or Chandra (X-ray). These external packages are distributed separately from the main IRAF distribution but can be easily installed. The IRAF system also includes a complete programming environment for scientific applications, which includes a programmable Command Language scripting facility, the IMFORT Fortran/C programming interface, and the full SPP/VOS programming environment in which the portable IRAF system and all applications are written.

IRAF is freely available on all platforms via anonymous ftp to our server at iraf.noao.edu. If you are unsure about whether IRAF can help you, we have a FAQ (frequently-asked questions list) to answer this particular question.

IRAF Project
National Optical Astronomy Observatories
950 North Cherry Avenue
Tucson, Arizona 85719
(520) 318-8000
iraf@noao.edu