KPF DRP Algorithms
Overview
The target audience here is astronomers who will use the data. The description of each algorithm should include:
a brief description of how the algorithm works
performance estimates, if appropriate
any caveats, if needed
development status (if partially implemented or not yet implemented)
Current Limitations and Development Plans
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Include:
Doppler stability on timescales longer than 1 day
consistency of wavelength solutions
intranight drift corrections for wavelength solutions
scattered light correction
outlier rejection in spectral extraction
sky subtraction
telluric corrections
Stellar activity indicators (see below)
CCD Image Processing
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Master Files Creation
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Include a description of how master stacks are made for bias, dark, flats, LFC, etalon, and ThAr.
Scattered light correction
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Spectral Extraction
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Sky Correction (not yet implemented)
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Wavelength Calibration
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Barycentric Correction
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Telluric Model (not yet implemented)
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Cross-Correlation based RVs
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Include a note about RV header information
Stellar Activity Information
KPF does not yet have stellar activity indicators produced as a standard data product from the DRP. The Ca H & K spectrometer covers the Ca H & K lines and we expect the DRP to produce S-values on the Mt. Wilson scale. Future DRP developments are also expected to include code to generate other activity indicators (Ca IR triplet, Hα, etc.)
Ca H&K Spectrometer Data Processing
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Exposure Meter Data Processing
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Quality Control
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Explain how the QC framework operates and describe the current status.
Guider Data Processing
The DRP does not further process the data from the KPF Guider that are stored in FITS extensions in the L0 files. These data include a guider image summed over the spectrometer integration and a table of guiding corrections, flux measurements, and other diagnostics taken from real-time Source Extractor analysis of the guider frames (typically at 100 Hz speed).