OBSERVED COMPOSITE SPECTRA OF BETA GEM Assembled 09-12-94. Bet Gem photometry file: photometry actually used to construct the spectrum. Name FWHM Mag.+/-Unc. Eff Wvl Eff Wvl F-lam (Vega) (star) W/cm2/um (um) (um) (um) Kn 0.0488 -1.14 0.02 2.208 2.205 1.13E-13 Ln 0.1443 -1.21 0.02 3.782 3.762 1.57E-14 M 0.6677 -1.13 0.02 4.758 4.733 5.95E-15 8.7 1.1576 -1.21 0.02 8.753 8.725 5.96E-16 11.7 1.2008 -1.22 0.02 11.650 11.623 1.94E-16 Spectral fragments and portions of these actually used in observed spectrum ("used" may include combination with other data where overlaps occur). Fragment Reference Total range Start and stop Average resolving (um) wavelengths (um) power NIR 1 1.22- 5.66 1.22- 4.90 50 KAO 2 4.92- 9.39 4.92- 7.63 150 8-13 3 7.67-12.83 7.67-12.83 55 LRS 4 7.80-22.60 10.39-12.94 30 LONG 5 16.14-24.61 16.26-24.02 73 VERY-LONG 6 1.22-35.00 12.95-35.00 -- References: 1. Strecker, Erickson, and Witteborn 1979, Ap.J. Suppl., 41, 501 2. HIFOGS data of Dec 21, 1991 KAO flight [Bet Gem/Alp CMa]. 3. CGS3 UKIRT data of Nov. 5, 1993 [Bet Gem/Alp Tau] {multiplied by CGS3 UKIRT [Alp Tau/Alp CMa] from Nov. 9, 1991}. Confirmed also by UKIRT CGS3 [Bet Gem/Alp CMa] of Nov. 3, 1993 and also of Nov. 4, 1993. 4. LRS raw data extracted from the new Groningen IRAS database and recalibrated with "LRSCAL" routine in "GIPSY" package. 5. CGS3 UKIRT 20 um ratio of [Bet Gem/Alp CMa] of Feb. 7, 1994 from the UKIRT archives. 6. Engelke Fn. used for T=4866K (see Blackwell, Lynas-Gray, and Petford 1991, Astron. Astrophys., 245, 567) and ang. diam.=7.807 milliarcsec; we rescaled this to 8.07 mas. This Engelke Function was locked to the photometrically scaled combination of 8-13 and the LRS, by "splicing" and used to replace the observations beyond 12.95 um (bias only +/-0.14%). The uncertainty in EFn. due to an effective temperature error of 100K is 2.1% which was input as the uncertainty in this extrapolating fragment because of the additional shape constraints available from the LONG spectral fragment. Information on splices and biases incurred Process Factor determined +/-Bias% NIR cf. photometry 1.020 1.26 813 cf. photometry 1.019 1.03 LRS blue/red bias -- 0.09 LRS splice to 813 1.115 0.33 KAO joint splice to NIR and merged 813/LRS 1.025 0.06 Engelke Fn. splice to combined 813/LRS 1.052 0.14 ==================================================== Notes: 1. Template spectra are NOT tabulated at equal intervals of the wavelength, but rather at the wavelengths of the original measurements. 2. In most cases "total uncertainty" is the error term most appropriate to use. It is the standard deviation of the spectral irradiance and includes the local and global biases. Local and global biases are given as a percent of the irradiance. The global bias does not contribute error to flux ratios or color measurements, and may, in those cases, be removed (in the rss sense) from the total error. ====================================================