UIST Imaging
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Imaging: Data Reduction Recipes
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The following tables describe the UIST imaging ORACDR
recipes; click on the recipe name for more information.
The Requirements listed below are frames that should be obtained
prior to use of the recipe, although data can always be re-reduced
when the appropriate frames have been taken. Darks must have the same integration
time as the target frames, and flats must be obtained through the
same filters.
Point Source Recipes - Thermal
| Recipe Name |
Requirements |
Comments |
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NOD_SELF_FLAT_NO_MASK |
Dark |
Pairs subtracted for fast sky removal, self flat |
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NOD_SELF_FLAT_NO_MASK_APHOT |
Dark |
As above with photometry on positive and negative images of target |
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Extended Source Recipes
| Recipe Name |
Requirements |
Comments |
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QUADRANT_JITTER |
Dark |
Jitter source between 4 quadrants of the array; good for slightly extended target where surroundings are clean for flat |
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QUADRANT_JITTER_NO_MASK |
Dark |
As above, though quicker: use if field uncrowded |
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QUADRANT_JITTER_BASIC |
Dark |
As above, though quicker still with only registration to nearest pixel |
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EXTENDED_3x3 |
Dark |
Alternates sky/object, maps area 3x3 frames on object |
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EXTENDED_3x3_BASIC |
Dark |
Same as above, though without masking and resampling for speed |
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EXTENDED_5x5 |
Dark |
Alternates sky/object, maps area 5x5 frames on object |
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EXTENDED_5x5_BASIC |
Dark |
Same as above, though without masking and resampling for speed |
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NOD_SKY_FLAT_THERMAL |
Dark |
Alternate object and sky frames are subtracted and divided by a flat formed from the sky |
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CHOP_SKY_JITTER |
Dark |
Alternating between object and sky, subtracts a modal sky value and is not suitable for
thermal imaging |
| CHOP_SKY_JITTER_BASIC |
Dark |
Alternating between object and sky, though without masking and resampling for speed |
Polarimetry Recipes
| Recipe Name |
Requirements |
Comments |
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SKY_FLAT_POL_ANGLE |
Dark |
Offset on blank sky; creates flat for each WP angle separately |
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POL_JITTER |
Dark; separate "POL" flat field |
Jitter E-W on source at each of 4 WP posns. |
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POL_ANGLE_JITTER |
Dark; separate "POL" flat field |
Observes 4 WP posns. then jitters EW |
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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 |
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