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Proceedings Paper

AMDC: de-biasing AMBER visibilities for limiting magnitude sources
Author(s): G. Li Causi; S. Antoniucci; E. Tatulli
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Paper Abstract

The AMBER instrument, the three beams interferometric combiner of the VLTI, occasionally su.ers from a fringing artifact, called "correlated noise", likely induced by electromagnetic radio frequencies present in the lab. We analyze how this noise affects the extracted visibilities, becoming more important for fainter sources. This unwanted effect can cause an overestimate of the instrumental V2 for low flux observations. We have developed a software tool, called "AMBER Detector Cleaner" (AMDC), which successfully removes this artifact and we present here the method on which it is based and some example results. Such software is made available to the community, so that AMBER users can perform optimal data reduction even for faint sources.

Paper Details

Date Published: 28 July 2008
PDF: 7 pages
Proc. SPIE 7013, Optical and Infrared Interferometry, 701348 (28 July 2008); doi: 10.1117/12.786917
Show Author Affiliations
G. Li Causi, INAF, Rome Astronomical Observatory (Italy)
S. Antoniucci, INAF, Rome Astronomical Observatory (Italy)
E. Tatulli, Lab. d'Astrophysique, Observatoire de Grenoble (France)


Published in SPIE Proceedings Vol. 7013:
Optical and Infrared Interferometry
Markus Schöller; William C. Danchi; Françoise Delplancke, Editor(s)

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