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Enhanced Degap and Wavelength Corrections for HRC-S: Improved Data Accuracy

This document outlines the improved degap and wavelength corrections for the HRC-S as developed by Vinay Kashyap, Sun-Mi Chung, Pete Ratzlaff, and Jeremy Drake. It details the methodology involving corrections to line locations based on detector positions, achieving an rms of 0.006 Å over standard analysis. This new approach replaces earlier scripts and aims to enhance the accuracy of spectral data without affecting continuum spectra. Future steps include applying empirical degapping corrections derived from continuum analysis to further refine results.

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Enhanced Degap and Wavelength Corrections for HRC-S: Improved Data Accuracy

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  1. HRC-S/LETG: Degap and Wavelength CORRECTIONS Vinay Kashyap Sun-Mi Chung Pete Ratzlaff Jeremy Drake CXC/SAO

  2. AR Lac trace (RAWX,RAWY) (DETX,DETY)

  3. rms = 0.014 Å (0.010 Å)

  4. rms = 0.010 Å (0.006 Å)

  5. HRC-S Degap Corrections $CALDB/data/chandra/hrc/bcf/gaplookup/hrciD1999-07-22gaplookupN0002.fits – based on detailed corrections to line locations as a function of detector positions previously computed from polynomial degap solutions – replaces Pete Ratzlaff’s corrlam script – improves wavelength scale; rms ~ 0.006 Ang over S1 – has no measurable effect on continuum spectra – next (and final) step: apply to empirical degapping corrections derived from continuum spectra

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