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Off-line Reduction

The overall approach to IR data reduction is summarized in Figure J.3 (inspired by a similar diagram in T.M. Herbst's manual for the Calar Alto MAGIC cameras). We shall describe each of these steps below, and indicate the necessary MIDAS routines to achieve them.

**Figure J.1:** IR Data Reduction
$\begin{figure}\centerline{ \psfig{figure=fig_irac2_red.ps,width=7cm,bbllx=0pt,bblly=0pt,bburx=500pt,bbury=700pt}}\end{figure}$

Bad Pixel Detection and Removal
Construction of Flat Fields
- Standard construction
- Alternative construction
Sky Subtraction
Flat Fielding
Combining Images
Mosaicing
Further Off-line Analysis

Petra Nass
1999-06-15