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Proceedings Paper

Characterizing the red optical sky background fluctuations from narrow-band imaging
Author(s): M. Puech; H. Flores; Y. B. Yang; M. Rodrigues; T. Gonçalves; F. Hammer; K. Disseau
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Paper Abstract

The detection and characterization of the physical properties of very distant galaxies will be one the prominent science case of all future Extremely Large Telescopes, including the 39m E-ELT. Multi-Object Spectroscopic instruments are potentially very important tools for studying these objects, and in particular fiber-based concepts. However, detecting and studying such faint and distant sources will require subtraction of the sky background signal (i.e., between OH airglow lines) with an accuracy of 1%. This requires a precise and accurate knowledge of the sky background temporal and spatial fluctuations. Using FORS2 narrow-band filter imaging data, we are currently investigating what are the fluctuations of the sky background at 9000A. We present preliminary results of sky background fluctuations from this study over spatial scales reaching 4 arcmin, as well as first glimpses into the temporal variations of such fluctuations over timescales of the order of the hour. This study (and other complementary on-going studies) will be essential in designing the next-generation fiber-fed instruments for the E-ELT.

Paper Details

Date Published: 24 September 2012
PDF: 12 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84467L (24 September 2012); doi: 10.1117/12.925897
Show Author Affiliations
M. Puech, GEPI, Observatoire de Paris, CNRS, Univ. Paris-Diderot (France)
H. Flores, GEPI, Observatoire de Paris, CNRS, Univ. Paris-Diderot (France)
Y. B. Yang, GEPI, Observatoire de Paris, CNRS, Univ. Paris-Diderot (France)
National Astronomical Observatories (China)
M. Rodrigues, European Southern Observatory (Chile)
GEPI, Observatoire de Paris, CNRS, Univ. Paris-Diderot (France)
Instituto Superior Tecnico (Portugal)
T. Gonçalves, Observatorio do Valongo (Brazil)
F. Hammer, GEPI, Observatoire de Paris, CNRS, Univ. Paris-Diderot (France)
K. Disseau, GEPI, Observatoire de Paris, CNRS, Univ. Paris-Diderot (France)


Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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