The relative spectral response calibration of the ISO-SWS

B. Vandenbussche*, P. W. Morris, E. A. Valentijn, D. A. Beintema, D. R. Boxhoorn, L. Decin, T. De Graauw, H. Feuchtgruber, A. M. Heras, F. Lahuis, R. Lorente, D. Lutz, P. R. Roelfsema, A. Salama, R. F. Shipman, R. Van Malderen, E. Wieprecht

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

The Relative Spectral Response Function (RSRF) characterises the wavelength dependent response of a spectrometer. The wavelength range of the grating section of the ISO-SWS is covered in 15 spectral bands for each of which the RSRF has to be determined. We discuss how the RSRF was measured during the Instrument Level Tests before launch, and how it was corrected based on in-orbit measurements of stellar calibration sources. Uncertainties in synthetic spectra and noise in the calibration observations can result in the introduction of erroneous spectral features in the RSRF. We show how this can be avoided by a careful selection of calibration sources across different spectral types and the use of spline smoothed correction curves.

Original languageEnglish
Title of host publicationThe Calibration Legacy of the ISO Mission
Pages455-458
Number of pages4
Publication statusPublished - May-2003
EventThe Calibration Legacy of the ISO Mission - madrid, Spain
Duration: 5-Feb-20019-Feb-2001

Publication series

NameEuropean Space Agency, (Special Publication) ESA SP
Volume481
ISSN (Print)0379-6566

Conference

ConferenceThe Calibration Legacy of the ISO Mission
Country/TerritorySpain
Citymadrid
Period05/02/200109/02/2001

Keywords

  • Calibration
  • Flux calibration
  • ISO
  • Relative Spectral Response Function
  • RSRF
  • SWS

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