=====
Notes
=====

Setting default values
----------------------

Several parameter values can be set to define the way ChiantiPy behaves.  The following parameter values can be set in your ~username/.chianti/chiantirc file.  These are:
    

wavelength
    this parameter has not been fully implemented.  The default is angstrom.  In the future, nanometers (nm) and kilo volts (kev) will be implemented.

flux
    acceptable values are *energy* and *photon* and these govern emissivities and intensities.  the default value is *energy*.

abundfile
    the name of the abundance file.  Acceptable values are any of the file names in XUVTOP/abundance, such as *cosmic_1973_allen*.  The default value is *sun_photospheric_1998_grevesse* which includes the abundances of Grevesse and Sauval, 1998, Space Science Reviews, 85, 161.

ioneqfile
    the name of the ionization equilibrium file.  Acceptable values are any of the file names in XUVTOP/ioneq such as *arnaud_raymond*, *arnaud_rothenflug*, or *chianti*.  The default value is *chianti* which includes the ionization equilibrium calculations of Dere, et al., 2009, Astronomy and Astrophysics, 498, 915 and are considered to be based on the best ionization and recombination rates currently available.



Setting *minAbund* in spectrum calculations
-------------------------------------------

When calculation spectra with *spectrum* or *mspectrum*, it is often useful to set the "minAbund" keyword which governs the minimum abundance of any element included in the calculation.  Below is a list of elemental abundances for the elements through zinc and the elements that will be included by several value of "minAbund".
    
=======  =========  ========  =======  ======

      
Element  Abundance          minAbund
-------  ---------  -------------------------
  ..       ..       1.e-6     1.e-5     1.e-4
=======  =========  ========  =======  ======
 H       1.00e+00      +      +        +      
He       8.51e-02      +      +        +      
Li       1.26e-11
Be       2.51e-11
 B       3.55e-10
 C       3.31e-04      +      +        +            
 N       8.32e-05      +      +
 O       6.76e-04      +      +        +      
 F       3.63e-08  
Ne       1.20e-04      +      +        +      
Na       2.14e-06      +      
Mg       3.80e-05      +      +      
Al       2.95e-06      +      
Si       3.55e-05      +      +      
 P       2.82e-07  
 S       2.14e-05      +      +      
Cl       3.16e-07  
Ar       2.51e-06      +      
 K       1.32e-07  
Ca       2.29e-06      +      
Sc       1.48e-09  
Ti       1.05e-07  
 V       1.00e-08  
Cr       4.68e-07  
Mn       2.45e-07  
Fe       3.16e-05      +      +      
Co       8.32e-08  
Ni       1.78e-06      +      
Cu       1.62e-08  
Zn       3.98e-08  
=======  =========  ========  =======  ======

It shoud be noted that CHIANTI does not include a complete set of data for every ion of every element in this list.