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arxiv: astro-ph/0301207 · v1 · submitted 2003-01-13 · 🌌 astro-ph

Crowding in the GAIA spectrograph focal plane

Tomaz Zwitter (1) , Arne Henden (2) ((1) University of Ljubljana , Ljubljana , Slovenia; (2) Universities Space Research Association , Flagstaff , Arizona) This is my paper
classification 🌌 astro-ph
keywords planespectrographfocalgaiagalacticoverlapsstellarsuperpositions
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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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