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The recalibration of the UVES-POP stellar spectral library

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arxiv 1802.03570 v1 pith:YNBBRY4E submitted 2018-02-10 astro-ph.IM

Svyatoslav Borisov , Igor Chilingarian , Eugene Rubtsov , Cédric Ledoux , Claudio Melo , Kirill Grishin This is my paper
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keywords spectrallibrarystellarfluxripplesspectrauvesuves-pop
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We have re-reduced all spectra from the UVES-POP stellar spectral library using the version 5.5.7 of the UVES pipeline and an algorithm we designed, which allows us to remove ripples in regions where echelle orders are stitched. These ripples are caused by the offset of a flat field with respect to a science frame and under- or oversubtraction of scattered light. We have also developed an approach to merge 6 UVES spectral chunks divided by gaps in the spectral coverage by using synthetic stellar atmospheres to predict the flux difference between the segments. At the end, we improved the flux calibration quality to 2% or better for 85% of 430 spectra in the library.

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