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DATA_PRODUCTS
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DATA_PRODUCTS
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KCWI Data Reduction Pipeline Data Products Table
KCWI raw data filenames are constructed as follows:
<froot><imgnum>.fits and contain raw CCD data numbers.
KCWI reduced data filenames are constructed as follows:
<froot><imngnum>_<ext>.fits
With:
<froot> defaults to kbYYMMDD_, with YYMMDD being the current date,
but can be modified.
<imgnum> a zero-filled integer of consistent width, usually 5 characters.
<ext> specifies the specific product and is tabulated below.
ext data units Stage notes
--------------- ----------------------- ----- ------------------------
int e-/px 1 reduced output intensity
var e-^2/px 1 variance
msk flag 1 see below for flag values
obj e-/px 1 (N&S) nod-and-shuffle object panel
sky e-/px 1 (N&S) nod-and-shuffle sky panel
intd e-/px 2 dark current/scattered light removed
vard e-^2/px 2 variance + dark/scat image variance
mskd flag 2 same
wavemap Ang 3 wavelength value at pixel
slicemap 0-23 3 slice number at pixel
posmap 0-140 3 slice position (px) at pixel
intf e-/px 4 instrumental variations removed
varf e-^2/px 4 variance + flat image variance
mskf flag 4 same
intk e-/px 5 sky subtracted
vark e-^2/px 5 variance + sky variance
mskk flag 5 same
obj e-/px 5 un-sky subtracted image
sky e-/px 5 sky model image
icube e-/px 6 geom corrected data cube
vcube e-^2/px 6 variance cube
mcube flag 6 mask cube
ocube e-/px 6 un-sky subtracted data cube
scube e-/px 6 sky model cube
icubed e-/px 7 DAR corrected data cube
vcubed e-^2/px 7 DAR corrected variance cube
mcubed flag 7 DAR corrected flag cube
ocubed e-/px 7 DAR corrected un-sky subtracted cube
scubed e-/px 7 DAR corrected sky model cube
icubes flux/px 8 std star calibrated data cube
vcubes flux^2/px 8 variance in flux units
mcubes flag 8 same
ocubes flux/px 8 std star calibrated un-sky sub cube
scubes slux/px 8 std star calibrated sky model cube
Mask file flag values and their meaning:
value meaning stage routine
----- ------- ----- -------
1 Saturated pixel 1
2 Bad column fixed 1
4 CR fixed 1
8 Negative flat value 5 kcwi_make_flat.pro
16 On slice edge 5 kcwi_make_flat.pro
32 Low signal flat 5 kcwi_make_flat.pro
64 Outside slices 6 kcwi_apply_geom.pro
128 DAR padded pixel 7
NB: When mask images are resampled, non-standard values will result. Use
caution when testing flag values after stage 5.