Files with arf extension are data files in Flexible Image Transport System commonly used in astronomy. Also known as FITS images.

There are 5 other file types using
the ARF file extension!

empty icon.arf - WebEx advanced record [common]

empty icon.arf - easy4 Tutor data file

empty icon.arf - AOL Instant Messenger (AIM) resource data

empty icon.arf - PacMania 2 game archive

empty icon.arf - Axon RAW Format

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ARF file extension - FITS auxiliary response file

What is arf file? How to open arf files?

File type specification:

Bitmap image file type icon Bitmap image file type

The arf file extension is used for one of the derived formats of FITS (Flexible Image Transport System) format commonly used in astronomy. The ARF is a standard OGIP file format.

The arf file contains the combined telescope/filter/detector areas ("effective area") and the quantum efficiency (QE) as a function of energy averaged over time (and therefore, aspect). The effective area is [cm2] and the QE is [counts/photon]; they are multiplied together to create ARF, resulting in [cm2 counts/photon].

When the input spectrum is multiplied by the ARF, the result is the distribution of counts that would be seen by a detector with perfect (i.e. infinite) energy resolution. The RMF is then needed to produce the final observed spectrum.

For more information check the fits file extension.

The default software associated to open arf file:

XnView MP icon

Pierre-Emmanuel Gougelet logoXnView MP  Multiplatform software

Company or developer:
Pierre-Emmanuel Gougelet

A free (for non-commercial purposes) powerful cross-platform media browser, viewer and converter. Compatible with more than 500 formats and also supports export to 70 different file formats. It works on Windows, Linux and macOS (OS X).

Help how to open:

Some graphics viewers may be able to open this highly specialized graphics file.

How to convert:

It may be possible to convert this type of .arf to some common picture format for previewing purposes.

Related links:

FITS ARF related information

List of software applications associated to the .arf file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open arf file, edit arf file, convert arf file, view arf file, play arf file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting arf files.

arf file viewer - programs that view arf file - FITS auxiliary response file

Programs supporting the exension arf on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about XnView MP for view arf file action.


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