Spectral irradiance calibration in the infrared. I - Ground-based and IRAS broadband calibrations

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.

Keywords

PhysicsIrradianceInfraredBroadbandCalibrationRemote sensingOpticsAstrophysics

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Publication Info

Year: 1992
Type: article
Volume: 104
Pages: 1650-1650
Citations: 215
Access: Closed

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APA Style

                            
                                    Martin Cohen, 
                                
                                    Russell G. Walker, 
                                
                                    M. J. Barlow
                                
                                et al.
                            
                            (1992). 
                            Spectral irradiance calibration in the infrared. I - Ground-based and IRAS broadband calibrations. 
                            The Astronomical Journal
                            , 104
                            
                            , 1650-1650.
                            https://doi.org/10.1086/116349

Identifiers

DOI: 10.1086/116349