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SKY_AND_JITTER

Reduces a “combined jitter” photometry observation

Description:

This script reduces a “combined jitter” photometry observation with UKIRT imaging data. It takes an imaging observation comprising one or more sets of frames, each set containing a sky frame, followed by jittered object frames; and a pre-determined flat-field frame to make a calibrated, trimmed mosaic automatically.

This recipe performs bad-pixel masking, null debiassing, sky subtraction, flat-field division, feature detection and matching between object frames, and resampling. See the “Notes” for details.

This recipe is suitable for moderately faint point sources.

Notes:

Output Data

Parameters:

NUMBER = INTEGER
The number of frames in the jitter, excluding the sky frame. If absent, the number of offsets, as given by header NOFFSETS, minus two is used. If neither is available, 5 is used. An error state arises if the number of jittered frames is fewer than 3. []
USEVAR = LOGICAL
Whether or not to create and propagate variance arrays. [0]

Related Recipes

JITTER_SELF_FLAT, NOD_SELF_FLAT_NO_MASK, SKY_AND_JITTER_APHOT,
SKY_FLAT, SKY_FLAT_MASKED.

Implementation Status:

Deprecated Variants

SKY_AND_JITTER5.