A Method for Calibrating, in Absolute Flux Units, Ca II H Profiles of Late Type Stars Observed at ESO
1988 ◽
Vol 132
◽
pp. 153-161
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In this paper we have applied to the Sun a method for calibrating, in absolute flux units, Ca II H profiles of late-type stars. After comparing, in the region 3948-3882 A, an LTE synthetic spectrum with the data of the solar flux Atlas by Kurucz et al. (1984), we have defined the wavelength ranges where observations agree with computations, based on specific radiative equilibrium models and collisional broadening parameters. By fitting in these regions the spectrum of the moon observed at ESO with the corresponding synthetic spectrum, we derived a calibration factor that enables us to calibrate, in absolute flux units, the whole observed range.
1997 ◽
Vol 161
◽
pp. 707-709
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2017 ◽
Vol 22
(2)
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pp. 155-160
XLIV. Variation of the compass, as observed on board the Endeavour Bark, in a voyage round the World
1771 ◽
Vol 61
◽
pp. 422-432
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