QUADRANT_JITTER_TELE

Reduces a “Quadrant Jitter” observation, using object masking, and telescope offsets for registration

Description:

This script reduces a “quadrant jitter” photometry observation with near-infrared imaging data. It takes an imaging observation comprising one or more series of four object frames where the target is approximately centred in each quadrant; and a dark frame to make a calibrated, untrimmed mosaic automatically.

It performs bad-pixel masking, null debiassing, dark subtraction, flat-field creation and division, registration using telescope offsets, and resampling. See the “Notes” for further information.

This recipe is intended for extended moving sources (comets) tracked by the telescope. The source extent should not exceed 45 arcseconds for UFTI or 10 arcseconds for IRCAM, in moderately crowded fields. Sources may include those with a comparatively bright core embedded in faint extended emission. The object need not be isolated, as the recipe masks objects within the other quadrants, and hence does not introduce significant artifacts into the flat field. This recipe should not be used for frames where the telescope has not guided on the moving object. In that case reduction should be performed by MOVING_QUADRANT_JITTER, which registers using the telescope offsets alone.

Notes:

Output Data

Parameters:

USEVAR = LOGICAL
Whether or not to create and propagate variance arrays. [0]

Related Recipes

JITTER_SELF_FLAT_TELE, MOVING_JITTER_SELF_FLAT,
MOVING_QUADRANT_JITTER, QUADRANT_JITTER.

Implementation Status: