Measurements of the monochromatic flux from VEGA in the near-infrared

Details Measurements of the monochromatic flux from VEGA in the near-infrared Measurements of the monochromatic flux from VEGA in the near-infrared

May 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...197..587h&link_type=abstract

Astrophysical Journal, vol. 197, May 1, 1975, pt. 1, p. 587-592.

Astronomy and Astrophysics

Astrophysics

70

Monochromatic Radiation, Near Infrared Radiation, Stellar Spectra, Stellar Spectrophotometry, Calibrating, Electrophotometry, Infrared Spectra, Paschen Series, Radiation Measurement, Spaceborne Telescopes, Stellar Radiation

Scientific paper

The monochromatic flux from Vega is measured at several wavelengths in the near-IR to measure the color between 8090 and 10,400 A and to obtain a flux calibration with an accuracy approaching 1%. Copper freezing-point blackbodies were used as standard sources and were compared to Vega with a double-pass photoelectric spectrophotometer mounted on 12 and 60-inch telescopes. Horizontal and vertical extinction coefficients are calculated, and various sources of error are identified. A value of -0.158 mag is obtained for the color between 8090 and 10,400 A across the Paschen discontinuity, which is believed to be accurate to better than 1%, and a flux calibration is derived which is accurate to about 2%.

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