Readme

Description: 
         A computer code (procedure) written in Interactive Data Language 
         (IDL, version 8.4) to compute the spectral line profile indicators used 
         by Lanza et al. (2018, A&A in press, arXiv:1804.07039). The procedure
         takes the fits files provided by the data reduction software (DRS) of 
         HARPS or HARPS-N as an input. 
         
         An example for the input files and the corresponding output file is 
         provided in the directory /input with the sole purpose of allowing to test 
         the proper compilation and running of the procedure. Details on an auxiliary 
         source file (mpfit.pro) required for compilation are provided in the 
         header of the procedure file and in Appendix A of the above mentioned 
         paper. Interested users are warmly recommended to read them before 
         compiling and running the procedure. 

File summary and contents:
- README.md: this description ASCII file; 

- asym_ind.pro: the IDL procedure to compute the asymmetry indicators and the 
  FWHM of the CCF as specified by Lanza et al. 2018; please change the string 
  PATH and the string OPERATION before compiling and running as explained in the
  header of the procedure file (see also Appendix A of Lanza et al. 2018); when 
  using files produced by the DRS of HARPS@ESO, please check the dimensions of the 
  matrixes extracted from the FITS files because the current version of the 
  procedure assumes those of the files produced by the DRS of HARPS-N@TNG;
  
- mpfit.pro: the fitting routine used by asym_ind.pro (see the header of the 
  above file for instructions about the compilation and Lanza et al. 2018, 
  Appendix A); this procedure is authored by Craig B. Markwardt, NASA/GSFC; see
  http://cow.physics.wisc.edu/~craigm/idl/fitting.html
  
- /input: a directory containing a sample dataset consisting of *_ccf_* and 
  *_bis_* files of the star HD108874 as provided by the DRS of HARPS-N 
  (see Lanza et al. 2018, Appendix A); for more information on this dataset you 
  can refer to the GAPS series paper dedicated to HD 108874, that is Benatti 
  et al. 2017, A&A 599, A90; 
  
- output.dat: the sample output file containing the asymmetry parameters and the
  FWHM of the CCF together with other information as specified in the header of 
  asym_ind.pro. 

  For further info please send an email to: nuccio.lanza@oact.inaf.it