===============================================================================
FEPS: Model SED Database
------------------------

Some remarks
                                                 ------------------------------
                                                 Sebastian Wolf, Sept. 24, 2003
					                swolf@astro.caltech.edu
===============================================================================

(1) The database has been generated with an IDL routine using
    the radiative transfer tool DDS (http://mc.caltech.edu/dds/).
    Thus it will be easy to expand the database in respect of grain radii 
    and/or dust chemistries if necessary.

(2) For several of the dust grain chemistries optical data were available
    in a very limited wavelength range only. The calculated dust reemission
    SEDs are therefore not really correct (mostly in respect of 
    the underlying continuum), but show at least the characteristic spectral 
    features.

(3) The database contains not only the resulting dust reemission SED
    (calculated for a particular debris disk model - see README2),
    but also the absorption and scattering efficiencies over the whole
    considered wavelength range (Qabs, Qsca). Since these quantities
    do not depend on any disk model, but only on the dust grain properties
    (chemistry,size) it might be worth to consider them for the determination
    of the dust grain chemistries instead. 
    Furthermore, the dust reemission SED combines both the influence 
    of absorption (-> reemission) and scattering, while the latter 
    may be dominating the wavelength range below about 10 micron.

(4) The SEDs and efficiency factors have been calculated at 5000 wavelengths
    distributed equidistantly on a logarithmic scale in the range 3-45 micron. 
    The spectral resolution is therefore by about a factor of 4 larger than
    the highest spectral resolution provided by the IRS.