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+ImageJ is a graphical user interface (GUI) driven, public domain,
+Java-based, software package for general image processing
+traditionally used mainly in life sciences ﬁelds. The image processing
+capabilities of ImageJ are useful and extendable to other scientiﬁc
+ﬁelds. Here we present AstroImageJ (AIJ), which provides an astronomy
+speciﬁc image display environment and tools for astronomy speciﬁc
+image calibration and data reduction. Although AIJ maintains the
+general purpose image processing capabilities of ImageJ, AIJ is
+streamlined for time-series differential photometry, light curve
+detrending and ﬁtting, and light curve plotting, especially for
+applications requiring ultra-precise light curves (e.g., exoplanet
+transits). AIJ reads and
+writes standard FITS ﬁles, as well as other common image formats,
+provides FITS header viewing and editing, and is World Coordinate
+System (WCS) aware, including an automated interface to the
+astrometry.net web portal for plate solving images. AIJ provides
+research grade image calibration and analysis tools with a GUI driven
+approach, and easily installed cross-platform compatibility. It
+enables new users, even at the level of undergraduate student, high
+school student, or amateur astronomer, to quickly start processing,
+modeling, and plotting astronomical image data with one tightly
+integrated software package.
+
+Rather than building from source, this package just copies a binary
+into the system. It is recommended that post-installation, the user
+changes the permissions of the install directory so that the user can
+update the software:
+
+# chown -R myname.users /usr/lib64/AstroImageJ
+
+It is further recommend to update to the latest daily build - in
+particular, the WCS-finding routine is broken on earlier versions.