Gaia Data Release 2
Free Access

Table 2

Bandpass-averaged optical transmission, followed by the total photon detection fraction, including both optics and CCDs, for wavelengths at the extremes of the RVS bandpass.

Optical Per element Surfaces Transmission
Mirrors 0.97 6 0.83
Bandpass filter 0.95
Grating 0.80
Prisms & lenses 0.98 8 0.85
Contamination 0.93
Microroughness 0.99
Total optical 0.62
Wavelength Optical CCD Total
847 nm 0.62 0.76 0.47
874 nm 0.62 0.65 0.40

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.