The following tables are designed to let you choose a set of ORAC-DR recipes appropriate for your particular observing requirements. Once you’ve selected a few recipes click on the recipe name for a complete description of what it does and, importantly, what its requirements are.

N.B. The Requirements listed below are frames that MUST be obtained PRIOR to use of the recipe. Darks must have the same integration time as the target frames, and flats must be obtained through the same filters.

Calibration Recipes

Recipe Name	Requirements	Comments
ARRAY_TESTS	None	Calculates readnoise and dark current
REDUCE_DARK	None	Stores a dark
SKY_FLAT	Dark	Stores a flat, no object masking
SKY_FLAT_MASKED	Dark	Stores a flat, though with object masking
SKY_FLAT_FP	Dark	Stores a flat – FP use only
SKY_FLAT_POL	Dark	Stores a flat – POL use only
SKY_FLAT_POL_ANGLE	Dark	Stores a flat at each WP angle – POL use only

Compact/Point-Source Recipes

Source Magnitude	Recipe Name	Requirements	Comments
13 < IZ < 17 JHK < 9	BRIGHT_POINT_SOURCE	Dark; separate flat field	Background too low for a self-flat
“””	BRIGHT_POINT_SOURCE_APHOT	Dark; separate flat field	Background too low for a self-flat
JHK > 15 IZ < 17	JITTER_SELF_FLAT	Dark	Creates flat from a sequence of jittered target frames
“””	JITTER_SELF_FLAT_NOMASK	Dark	As above, though quicker: use if field uncrowded
“””	JITTER_SELF_FLAT_BASIC	Dark	As above, though quicker still with only registration to nearest pixel
9 < JHK < 15	SKY_AND_JITTER	Dark; separate flat field	Sky then on-source jitter
“””	SKY_AND_JITTER_APHOT	Dark; separate flat field	Sky then on-source jitter with photometry
JHK > 15 IZ > 17	QUADRANT_JITTER	Dark	Jitter source between 4 quadrants of the array; good for slightly extended target where surroundings are clean for flat
“””	QUADRANT_JITTTER_NO_MASK	Dark	As above, though quicker: use if field uncrowded
“””	QUADRANT_JITTER_BASIC	Dark	As above, though quicker still with only registration to nearest pixel

Extended-Source Recipes

Source Type	Recipe Name	Requirement	Comments
Extent < 45″	QUADRANT_JITTER	Dark	Jitter source between 4 quadrants of the array; good or slightly extended target where surroundings are clean for flat
Extent < 45″	QUADRANT_JITTER_NO_MASK	Dark	As above, though quicker: use if field uncrowded
Extent < 45″	QUADRANT_JITTER_BASIC	Dark	As above, though quicker still with only registration to nearest pixel
Extent 45″ to 2′	EXTENDED_3X3	Dark	Alternates sky/object, maps area 3×3 frames on object
Extent 45″ to 2′	EXTENDED_3X3_BASIC	Dark	Same as above, though without masking and resampling for speed
Extend 45″ to 3′	EXTENDED_5X5	Dark	Alternates sky/object, maps area 5×5 frames on object
Extent 45″ to 3′	EXTENDED_5X5_BASIC	Dark	Same as above, though without masking and resampling for speed
Extent 30″ to 60″	CHOP_SKY_JITTER	Dark	Alternating between object and sky
Extent 30″ to 60″	CHOP_SKY_JITTER_BASIC	Dark	Alternating between object and sky, though without masking and resampling for speed

Moving-Target Recipes

Source Type	Recipe Name	Requirements	Comments
Non-Sidereal	MOVING_JITTER_SELF_FLAT	Dark	Registration uses ephemeris data
Non-Sidereal	MOVING_JITTER_SELF_FLAT_BASIC	Dark	For speed on moving target (without masking and resampling)
Non-Sidereal	JITTER_SELF_FLAT_TELE	Dark	Telescope tracks moving object; uses telescope offsets to register

Fabry Perot/Polarimetry Recipes

Instrument	Recipe Name	Requirements	Comments
FP	SKY_FLAT_FP	Dark	Stores a Flat for FP use
FP	FP	Dark; separate “FP” flat field	On/Off-line images with nodding to blank sky
FP	FP_JITTER	Dark; separate “FP” flat field	On/Off-line images with nodding to blank sky, plus jittering on-source.
FP	FP_JITTER_NO_SKY	Dark; separate “FP” flat field	On/Off-line images WITHOUT nodding to blank sky, plus jittering on-source.
Pol	SKY_FLAT_POL	Dark	Offsets on blank sky at different WP posns; combines all WP angles into one master flat
Pol	SKY_FLAT_POL_ANGLE	Dark	Offset on blank sky; creates flat for each WP angle separately
Pol	POL_JITTER	Dark; separate “POL” flat field	Jitter E-W on source at each of 4 WP posns
Pol	POL_ANGLE_JITTER	Dark; separate “POL” flat field	Observe 4 WO posns. then jitters EW
Pol	POL_EXTENDED	Dark; separate “POL” flat field	Object/Sky pairs at each of 4 WP posns.

Miscellaneous Recipes

Recipe Name	Requirements	Comments
QUICK_LOOK	None	Display raw data file (and convert from HDS to NDF)
NIGHT_LOG	None	Generate an ascii log