OBSERVED COMPOSITE SPECTRUM OF ALPHA BOO
Assembled on 4-28-93

Alpha Boo 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 -3.07 0.01   2.208    2.205     6.66E-13
Ln    0.1443 -3.15 0.01   3.782    3.762     9.39E-14
M     0.6677 -2.97 0.02   4.758    4.736     3.25E-14
8.7   1.1576 -3.12 0.01   8.753    8.730     3.46E-15
11.7  1.2008 -3.19 0.03  11.650   11.621     1.19E-15


Spectral fragments and portions of these actually used in observed spectrum

Fragment   Reference    Total range    Start and stop    Average resolving
			   (um)	       wavelengths (um)        power
NIR           1	        1.22- 5.70       1.22- 4.22             50
KAO	      2	        3.65- 9.39       4.44- 8.17            150
8-13          3	        7.65-13.17       7.65-10.96           220,55
LRS           4         7.80-22.70      11.10-19.00             30
Engelke Fn.   5	        1.25-35.00      19.10-35.00             --

References:
1. Strecker, Erickson, and Witteborn 1979, Ap.J. Suppl, 41, 501.
2. NASA-Ames KAO data from May 11, 1992 (alp Boo cf. alp Lyr) flight
3. NASA-Ames Mt. Lemmon data of Feb. 24, 1992 (alp Boo cf. alp Lyr) &
   UKIRT data of May 24 & 25, 1991 (CGS3 data of M. J. Barlow, priv.
   comm. to MC; alp Boo cf. bet Peg).
4. LRS raw data extracted from the new Groningen IRAS database and
   recalibrated with "LRSCAL" routine in "GIPSY" package.
5. Engelke Fn. used for T=4362K (see Blackwell, Lynas-Gray, and
   Petford 1991, A\&A, 245, 567) and angular diameter=20.430 mas; we
   rescaled this to 20.80 mas.  This Engelke Function was locked to the
   photometrically scaled combination of 8-13 and LRS spectra by splicing
   and used to replace the observations beyond 19.10 um.  A conservative
   error of 6.0% in EFn. due to effective temperature uncertainty was input
   for this fragment.


Information on splices and biases incurred

Process                  Factor determined       +/-Bias%
NIR cf. photometry           1.002                0.89
813 cf. photometry           1.056                0.85
LRS blue/red bias              --                 0.03
LRS splice to 813            0.933                0.03
KAO joint splice to
 NIR and merged 813/LRS      0.850                0.32
Engelke Fn. splice to
 combined 813/LRS            1.037                0.26


 ====================================================
 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.
 ====================================================