4. Example 1 - Extended source with offset to sky

This is a NIRI imaging observation of an extended source, a galaxy showing as a dense field of stars. The observation sequence uses an offset to a nearby blank portion of the sky to monitor the sky levels since there are no area in the science observation that is not “contaminated” by the galaxy.

• 4.1. Example 1 - Datasets descriptions
• 4.2. Example 1 - Extended source with offset to sky - Using the “reduce” command line
• 4.3. Example 1 - Extended source with offset to sky - Using the “Reduce” class