intranet - anu - wifes iraf data r p · 2012. 6. 21. · dodar dosubsky doslitsky overscan or...
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WiFeS workshop, RSAA 28 April 2010
WiFeS IRAF DATA
REDUCTION PACKAGE
Friday, 30 April 2010
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Turn raw files into calibrated 3D images
λ
yx
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( http://rsaa.anu.edu.au/observing/ssowiki/index.php/WiFeS_data_reduction )
Link to scripts here:RSAA home page ! WiFeS in menu ! ‘Data Reduction’ at bottom of wiki page
WiFeS package
Gemini package (NIFS)
IRAF/NOAO spectroscopy tasks
Requires IRAF (version 2.14)
+ external packages: Gemini, TABLES & STSDAS
An external IRAF package based on Gemini for NIFS
Friday, 30 April 2010
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Reformat files
Process calibration data
The package is set up for this general process:
wftable
Create image lists
wfcal
wftable
wfreduceApply calibrations &
construct data cubes
file lists
calibration solutions
Set I/O directorieswifes
Smooth-spectrum standard
Flux standard
Science data
Friday, 30 April 2010
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Raw files - simple FITS format
Multi-extension FITS files
Convert to multi-extension FITS
T2m3wr_20090405_124930[0][0]
T2m3wr_20090405_124930[1][4138,4096]image data + header
primary header unit⤺⤺
T2m3wr.20090405.134344.123[0][4138,4096]
image data + header⤺
wftable: Convert images to MEF & create file lists
Create image lists for grating+dichroic
wftable
wftable
Images assigned to text list files by the IMAGETYP header keyword value
IMAGETYP FileARC list_arc
FLAT list_gflat
SKYFLAT list_sflat
WIRE list_wire
ZERO list_zero
OBJECT list_obj
wfcal
wfreduce
}list files
Friday, 30 April 2010
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wfcal: Create calibration solutions
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Prepare images
wavelength solution
spatialsolution
master flat field frame
median bias
File listsCalibration files
Combine bias frames
Normalise flat field Identify & fit arc lines Find slice centres
Fit & correct slit profile
Measure image shift
wfreduce
dorefflat
dowfprepare
dozero
doarc dowiredogflat
dosflat
wfcal: Steps for processing calibration files
reference frame
Friday, 30 April 2010
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wfreduce: Reduce observations
Friday, 30 April 2010
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`Prepare’
wfreduce: Apply wfcal results & construct cubes
Bias subtractionCombine frames
Sky subtraction
Rescale & form data cube
DAR correction
`Reduce’
dowfprepare
docombine
doreduce
dofitcoorddotransform
dodar
dosubskydoslitsky
overscan or fitbias
doskyframe
dozero
Combine shuffled slices
dosubshuffled
data cube
Friday, 30 April 2010
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Expand binned data
Overscan bias subtraction
Bias frame surface fitting
`Prepare’
wfreduce: Apply wfcal results & construct cubes
Bias subtractionCombine frames
Sky subtraction
Rescale & form data cube
DAR correction
`Reduce’
dowfprepare
docombine
doreduce
dofitcoorddotransform
dodar
dosubskydoslitsky
overscan or fitbias
doskyframe
dozero
Combine shuffled slices
dosubshuffled
data cube
Subtract median bias frame (from wfcal)
Friday, 30 April 2010
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`Prepare’
wfreduce: Apply wfcal results & construct cubes
Bias subtractionCombine frames
Sky subtraction
Rescale & form data cube
DAR correction
`Reduce’
dowfprepare
docombine
doreduce
dofitcoorddotransform
dodar
dosubskydoslitsky
overscan or fitbias
doskyframe
dozero
Median-combine multiple frames
Combine shuffled slices
dosubshuffled
data cube
Friday, 30 April 2010
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`Prepare’
wfreduce: Apply wfcal results & construct cubes
Bias subtractionCombine frames
Sky subtraction
Rescale & form data cube
DAR correction
`Reduce’
dowfprepare
docombine
doreduce
dofitcoorddotransform
dodar
dosubskydoslitsky
overscan or fitbias
doskyframe
dozero
Combine shuffled slices
dosubshuffled
data cube
Subtract a separate blank sky frame
Subtract a sub-aperture average sky spectrum
Subtract `long-slit’ spectrum in each slice
Friday, 30 April 2010
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`Prepare’
wfreduce: Apply wfcal results & construct cubes
Bias subtractionCombine frames
Sky subtraction
Rescale & form data cube
DAR correction
`Reduce’
dowfprepare
docombine
doreduce
dofitcoorddotransform
dodar
dosubskydoslitsky
overscan or fitbias
doskyframe
dozero
Combine shuffled slices
dosubshuffled Shift and combine nod- or subnod-and-shuffled data
data cube
Friday, 30 April 2010
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`Prepare’
wfreduce: Apply wfcal results & construct cubes
Bias subtractionCombine frames
Sky subtraction
Rescale & form data cube
DAR correction
`Reduce’
dowfprepare
docombine
doreduce
dofitcoorddotransform
dodar
dosubskydoslitsky
overscan or fitbias
doskyframe
dozero
Combine shuffled slices
dosubshuffled
Extract 25 slices
Apply flat field
data cube
Friday, 30 April 2010
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`Prepare’
wfreduce: Apply wfcal results & construct cubes
Bias subtractionCombine frames
Sky subtraction
Rescale & form data cube
DAR correction
`Reduce’
dowfprepare
docombine
doreduce
dofitcoorddotransform
dodar
dosubskydoslitsky
overscan or fitbias
doskyframe
dozero
Combine shuffled slices
dosubshuffled
Transform image scales
Stack slices into 3D image
data cube
Friday, 30 April 2010
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`Prepare’
wfreduce: Apply wfcal results & construct cubes
Bias subtractionCombine frames
Sky subtraction
Rescale & form data cube
DAR correction
`Reduce’
dowfprepare
docombine
doreduce
dofitcoorddotransform
dodar
dosubskydoslitsky
overscan or fitbias
doskyframe
dozero
Combine shuffled slices
dosubshuffled
data cube
Friday, 30 April 2010
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Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
Extract telluric star spectrum
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
wfreduce: Further steps for standard star data
λx
y
(dotelcorrect)
dotelextract
Friday, 30 April 2010
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Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
Extract telluric star spectrum
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
wfreduce: Further steps for standard star data
(dotelcorrect)
dotelextract
Friday, 30 April 2010
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Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
wfreduce: Further steps for standard star data
(dotelcorrect)
Na D
Hα
Ca II
Remove stellar absorption
dofixtel
Friday, 30 April 2010
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Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
wfreduce: Further steps for standard star data
(dotelcorrect)
Remove stellar absorption
dofixtel
Friday, 30 April 2010
![Page 21: Intranet - ANU - WiFeS IRAF DATA R P · 2012. 6. 21. · dodar dosubsky doslitsky overscan or fitbias doskyframe dozero Combine shuffled slices dosubshuffled data cube Subtract](https://reader036.vdocuments.pub/reader036/viewer/2022071420/61197b01f936087f5c03141d/html5/thumbnails/21.jpg)
Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
wfreduce: Further steps for standard star data
(dotelcorrect)
Remove stellar absorption
Na D
Hα
Ca II
dofixtel
Friday, 30 April 2010
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Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
wfreduce: Further steps for standard star data
(dotelcorrect)
Normalise telluric spectrum
Extract and normalise example object spectrum
dotelcorrect
Friday, 30 April 2010
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Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
Correct telluric features
wfreduce: Further steps for standard star data
(dotelcorrect)dotelcorrect
Friday, 30 April 2010
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Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
wfreduce: Further steps for standard star data
(dotelcorrect)Extract flux spectrum
dofluxextract
Friday, 30 April 2010
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Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
wfreduce: Further steps for standard star data
(dotelcorrect)
Friday, 30 April 2010
![Page 26: Intranet - ANU - WiFeS IRAF DATA R P · 2012. 6. 21. · dodar dosubsky doslitsky overscan or fitbias doskyframe dozero Combine shuffled slices dosubshuffled data cube Subtract](https://reader036.vdocuments.pub/reader036/viewer/2022071420/61197b01f936087f5c03141d/html5/thumbnails/26.jpg)
Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
wfreduce: Further steps for standard star data
(dotelcorrect)Calculate flux
scale
dofluxcal
Friday, 30 April 2010
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Process smooth-spectrum standard
star (red)
Process flux standard star
Process science frames & apply standard star
calibrations
telluric spectrum
flux calibration
dotelextract
dofixtel
dofluxextract
(dotelcorrect)
dofluxcal
wfreduce: Further steps for standard star data
(dotelcorrect)Calculate flux
scale
dofluxcal
Friday, 30 April 2010
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wfreduce: a few last tasks...
doscience
dobincube
dosimcube
output datacube T2m3wr_20090405_124930_R3000_RT560_res_t.fits
..._res_bin.fits
..._res_tds9.fits
..._sci.fits
..._res_c.fits
Form projected image andintegrated spectrum
Re-bin cube spatial axes
Save simple FITS cube file
Friday, 30 April 2010