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)