Gravity, Geometry, and the Quantum

Sahlmann, Hanno

doi:10.1007/978-3-642-41992-8_37

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2014

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“…A detailed description of the science opportunities enabled by Gaia observations of naked-eye stars is being prepared. 12…”

Section: Science Opportunitymentioning

confidence: 99%

Enabling Gaia observations of naked-eye stars

et al. 2014

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The ESA Gaia space astrometry mission will perform an all-sky survey of stellar objects complete in the nominal magnitude range G = [6.0 -20.0]. The stars with G < 6.0, i.e. those visible to the unaided human eye, would thus not be observed by Gaia. We present an algorithm configuration for the Gaia on-board autonomous object observation system that makes it possible to observe very bright stars with G = [2.0-6.0). Its performance has been tested during the in-orbit commissioning phase achieving an observation completeness of ∼ 94% at G = 3 -5.7 and ∼ 75% at G = 2 -3. Furthermore, two targeted observation techniques for data acquisition of stars brighter than G=2.0 were tested. The capabilities of these two techniques and the results of the in-flight tests are presented. Although the astrometric performance for stars with G < 6.0 has yet to be established, it is clear that several science cases will benefit from the results of the work presented here.

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“…A detailed description of the science opportunities enabled by Gaia observations of naked-eye stars is being prepared. 12…”

Section: Science Opportunitymentioning

confidence: 99%