Gaia error models



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tarix02.01.2018
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Gaia error models

  • Gaia error models

    • Astrometry
    • Photometry
    • Spectra
    • Radial Velocities
    • Rotational velocities
    • Astrophysical Parameters
  • We describe here:

  • GOG approach

  • the receipts published in the Gaia Science Performance website







The mean end-of-mission standard error for parallax includes:

  • The mean end-of-mission standard error for parallax includes:

  • all known instrumental effects

  • an appropriate calibration error

  • 20 % margin (results from the on-ground data processing are not included)























Magnitudes:

  • Magnitudes:

    • G : broad-band (white-light), fluxes obtained in the astrometric instrument
    • GBp and GRp: integrated from low resolution spectra
    • GRVS: integrated from RVS spectrometer














Low-resolution spectro-photometry obtained in the Blue and Red Photometers

  • Low-resolution spectro-photometry obtained in the Blue and Red Photometers

    • Spectral dispersion & wavelength range:
    • BP: ~3 to ~27 nm pixel-1 ~330-680 nm
    • RP: ~7 to ~15 nm pixel-1 ~640-1050 nm
    • 1 CCD along scan each
  • RVS spectrometer:

  • Resolving power ~11,500

  • wavelength range: 847-874 nm.

  • 3 CCDs (strips) along scan

























































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