SIMBAD references

2004A&A...414..677V - Astronomy and Astrophysics, volume 414, 677-697 (2004/2-1)

On the analysis of band 3 of the ISO-SWS calibration sources.

VAN MALDEREN R., DECIN L., KESTER D., VANDENBUSSCHE B., WAELKENS C., CAMI J. and SHIPMAN R.F.

Abstract (from CDS):

We analyse ISO-SWS01 (R∼1500) 12-27.5µm (band 3) spectra of the 10 standard calibration stars with the highest flux using synthetic spectra generated from (marcs) atmosphere models. The comparison between the observed and synthetic spectra reveals the quality of (1) the atmospheric model construction and subsequent synthetic spectra computation and of (2) the (OLP10.1) calibration and data reduction of the spectrometer at these wavelengths. The models represent the general features of the observations, but the synthetic spectrum computation is hampered by the lack of comprehensive molecular and atomic line lists. We also suspect some problems with the temperature distribution in the outer layers of the model and inaccuracies in the extrapolation of the collision-induced absorption coefficients of H2 pairs. We detect baseline ripples and fringes in the observed spectra, that survive the calibration and detailed reduction process. Photometric calibration uncertainties are estimated by means of the scaling factors between the synthetic and observed spectra.

Abstract Copyright:

Journal keyword(s): stars: atmospheres - stars: fundamental parameters - instrumentation: spectrographs - molecular data

Status at CDS:  

Simbad objects: 15

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