Crowding in the GAIA spectrograph focal plane

Details Crowding in the GAIA spectrograph focal plane Crowding in the GAIA spectrograph focal plane

2003-01-13

arxiv.org/abs/astro-ph/0301207v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures; to be published in GAIA spectroscopy, Science and Technology, ASP Conference Series, U.Munari (ed.)

Scientific paper

Superpositions of stellar tracings are present in every slitless spectrograph. The probability for such overlaps in the GAIA RVS spectrograph focal plane is estimated using photometric observations of 66 stellar fields, mostly close to the Galactic plane. It is shown that overlaps of bright stars (V<17) are common near the Galactic plane, and no spectrum is free from superpositions of faint star tracings. Most overlappers are of spectral type K.

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