Measurement of the absolute flux from VEGA at 4.92 microns

Details Measurement of the absolute flux from VEGA at 4.92 microns Measurement of the absolute flux from VEGA at 4.92 microns

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...151..399m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 151, no. 2, Oct. 1985, p. 399-402.

Physics

Optics

75

Infrared Photometry, Infrared Stars, Infrared Windows, Radiant Flux Density, Stellar Spectrophotometry, Atmospheric Attenuation, Atmospheric Correction, Atmospheric Optics, Calibrating, Continuous Spectra

Scientific paper

Observations have been made of the absolute infra-red flux from Vega at 4.92 microns by comparison with a standard furnace, using the 1.5 m flux collector at the Observatorio del Teide, Tenerife. To avoid difficulty over the determination of atmospheric extinction in the water vapor region, observations were made in a narrow wavelength window which is relatively free of water vapor lines, isolated with the Imperial College cooled grating spectrometer. The results confirm previous observations at Tenerife of an infra-red excess from Vega relative to the model of Dreiling and Bell (1980) over the range 2-5 microns. A summary calibration for the wavelength range 1.24-5 microns is proposed based on these and previous observations that have been made as part of a continuing programme at Tenerife.

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