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Descripción del código fortran

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Descripción del código fortran


Subroutine that computes and assign Gaia errors to observables (Versión, October 2012)

Errors are computed following Gaia Science Performance web page

Universitat de Barcelona

Contact: Merce Romero-Gomez (mromero@am.ub.es), Josep Manel Carrasco (carrasco@am.ub.es)


Input external tables:

  • geometrical factors ('gfactor-Oct2012.dat')
  • Radial Velocity coefficients ('TableVr-Oct2012.dat')

Input files for the definition of constants:
  • const_math.h : mathematical constants
  • const_ast.h : astronomical constants

Input parameters from the star:
  • Equatorial helicocentric coordinates (units: radians)
  • Equatorial proper motions (units: arcsec/yr)
  • Parallax (units: arcsec)
  • Radial velocity (units: km/s)
  • V apparent magnitud
  • Observed (V-I) colour index (affected by extinction)
  • Atmospheric parameters for the star

Output values:
  • Parameters of the star as observed by Gaia (affected by errors)
  • Gaia errors assigned to each parameter:
  • The code offers two options depending of the type of errors you want to apply (see website):
    • jflag=1, errors computed from mean geometrical factors (see website)
    • jflag=-1,errors computed considering the scanning law of the satellite (the geometrical factors are then computed from the ecliptic latitude and the number transits)

 
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