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The NIRWALS instrument detrending software pipeline

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arxiv 2503.02829 v1 pith:YITRP7BV submitted 2025-03-04 astro-ph.IM

The NIRWALS instrument detrending software pipeline

classification astro-ph.IM
keywords nirwalspipelinebasiccodedetrendinginstrumentsoftwareadditional
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We describe the basic instrument detrending software for the NIRWALS spectrograph on the SALT telescope. Its basic purpose is to process multiple non-destructive reads of increasing exposure time into a final image reflecting the observed source intensity as expressed in counts (or electrons) per second, including its uncertainty. The output products of this pipeline can then be used to as input for follow-up data processing to apply wavelength solutions and extract fluxes for individual fibers. All pipeline code is implemented in python and can be obtained via common portals such as PyPI and GitHub. Additional information on how to use the code is available online at nirwals.readthedocs.io

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