Aperture Photometry Tool, v. 2.7.8, Available Now!

Aperture Photometry Tool, v. 2.7.8, is now available:

http://www.aperturephotometry.org/aptool/download/

There is a bug fix and enhancements in this release.

Bug fix: Forgot to divide output attribute ApertureNumRejected by the square of the calculational step size. Recast ApertureNumRejected from integer to double, in order to track fractional pixels.

Interface-change warning: There is a new column included in the output photometry-table file, called Flags, which is an integer that contains bit-wise binary flags for various conditions that affect the results.

 Aperture-Photometry-Tool Flags

 Bit   Value   Condition
 --------------------------------------------------------
  0       1     Aperture contains one or more source pixels (or portions thereof)
                with non-NaN values that were rejected from the
                photometry calculation (i.e., outside of range defined by
                lowerSrcDataLimit and upperSrcDataLimit in APT.pref).
  1       2     Aperture contains one or more source pixels (or portions thereof)
                with blanks or NaNs (not a number).
  2       4     Aperture contains one or more source pixels (or portions thereof)
                with values at or above the saturation level
                (caveat emptor: pixels in the original image might have been zapped,
                in which case, these are not included here).

Note: If either of the interpolation source algorithms is selected (Model 1 or 2),
      then the flags for bits 0-2 will apply to the interpolated values that
      replace original values.

Thanks to Paul Leyland for suggestions that lead to this improvement.

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