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SPECTRAL IRRADIANCE CALIBRATION IN THE INFRARED .1. GROUND-BASED AND IRAS BROAD-BAND CALIBRATIONS

Cohen, M; Walker, RG; Barlow, MJ; Deacon, JR; (1992) SPECTRAL IRRADIANCE CALIBRATION IN THE INFRARED .1. GROUND-BASED AND IRAS BROAD-BAND CALIBRATIONS. Astronomical Journal , 104 (4) pp. 1650-1657. 10.1086/116349. Green open access

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Abstract

Absolutely calibrated versions of realistic model atmosphere calculations for Sirius and Vega by Kurucz (1991) are presented and used as a basis to offer a new absolute calibration of infrared broad and narrow filters. In-band fluxes for Vega are obtained and defined to be zero magnitude at all wavelengths shortward of 20 microns. Existing infrared photometry is used differentially to establish an absolute scale of the new Sirius model, yielding an angular diameter within 1 sigma of the mean determined interferometrically by Hanbury Brown et al. (1974). The use of Sirius as a primary infrared stellar standard beyond the 20 micron region is suggested. Isophotal wavelengths and monochromatic flux densities for both Vega and Sirius are tabulated.

Type: Article
Title: SPECTRAL IRRADIANCE CALIBRATION IN THE INFRARED .1. GROUND-BASED AND IRAS BROAD-BAND CALIBRATIONS
Open access status: An open access version is available from UCL Discovery
DOI: 10.1086/116349
Publisher version: https://doi.org/10.1086/116349
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Astronomy & Astrophysics, FLUX METHOD, ABSOLUTE CALIBRATION, ANGULAR DIAMETERS, STARS, VEGA, TEMPERATURES, PHOTOMETRY, FURNACE
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10095212
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