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Gaia: Object Detectability Near Bright Extended Sources

Published online by Cambridge University Press:  15 February 2011

C. Turon ,
F. Meynadier ,
F. Arenou ,
A. Mora ,
J. M. Martín-Fleitas ,
F. Raison  and
R. Kohley
A. Mora
Affiliation:
ESA-ESAC, Gaia SOC, PO Box 78, Villanueva de la Cañada, Madrid, Spain. e-mail: alcione.mora@esa.int
J. M. Martín-Fleitas
Affiliation:
ESA-ESAC, Gaia SOC, PO Box 78, Villanueva de la Cañada, Madrid, Spain. e-mail: alcione.mora@esa.int
F. Raison
Affiliation:
ESA-ESAC, Gaia SOC, PO Box 78, Villanueva de la Cañada, Madrid, Spain. e-mail: alcione.mora@esa.int
R. Kohley
Affiliation:
ESA-ESAC, Gaia SOC, PO Box 78, Villanueva de la Cañada, Madrid, Spain. e-mail: alcione.mora@esa.int
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Abstract

The impact of bright extended sources on the observation and detection of faint sources by Gaia has been studied. The effect has been characterized using the representative case of stars near the Jupiter disk and consists of three parts. First, an analytical representation of the PSF, including aberrations and electronic distortions, has been developed to produce images of Jupiter and solar type stars. Second, those images have been combined to produce fields of view including Jupiter and stellar patterns. Third, the CCD images have been fed to the VPU algorithms prototype to determine the limits until which detections are possible. This work can be useful for science cases such as GAREQ.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 45: GAIA: At the Frontiers of Astrometry , 2010 , pp. 417 - 420
Copyright
© EAS, EDP Sciences 2011

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References

Références

Babusiaux, C., Arenou, F., & Gilmore, G., 2001, “The GAIA Instrument and Basic Image Simulator”. GAIA-CB-01
EADS Astrium, 2004, “GAIA Point Spread Function and internal straylight evaluation”. GAIASYS.NT.00134.T.ASTR
Lattanzi, M.G., & Crosta, M.T., 2009, “Implementation of the quadrupole deflection experiment in DPAC (GAREQ)”. GAIA-CU3-TN-INAF-ML-004-01
Mora, A., Raison, F., & Kohley, R., 2010, “Gaia PSF: modelisation and detectability of faint sources near bright extended objects”. GAIA-CA-TN-ESAC-AMF-002-01