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Proceedings Paper

Stellar photometry with multi conjugate adaptive optics
Author(s): Giuliana Fiorentino; Davide Massari; Alan McConnachie; Peter B. Stetson; Giuseppe Bono; Paolo Turri; David Andersen; Jean-Pierre Veran; Emiliano Diolaiti; Laura Schreiber; Paolo Ciliegi; Michele Bellazzini; Eline Tolstoy; Matteo Monelli; Giacinto Iannicola; Ivan Ferraro; Vincenzo Testa
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Paper Abstract

We overview the current status of photometric analyses of images collected with Multi Conjugate Adaptive Optics (MCAO) at 8–10m class telescopes that operated, or are operating, on sky. Particular attention will be payed to resolved stellar population studies. Stars in crowded stellar systems, such as globular clusters or in nearby galaxies, are ideal test-particles to test AO performance. We will focus the discussion on photometric precision and accuracy reached nowadays. We briefly describe our project on stellar photometry and astrometry of Galactic globular clusters using images taken with GeMS at the Gemini South telescope. We also present the photometry performed with DAOPHOT suite of programs into the crowded regions of these globulars reaching very faint limiting magnitudes Ks ∼21.5 mag on moderately large fields of view (∼1.5 arcmin squared). We highlight the need for new algorithms to improve the modeling of the complex variation of the Point Spread Function (PSF) across the field of view. Finally, we outline the role that large samples of stellar standards plays in providing a detailed description of the MCAO performance and in precise and accurate colour-magnitude diagrams.

Paper Details

Date Published: 26 July 2016
PDF: 17 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 990906 (26 July 2016); doi: 10.1117/12.2234448
Show Author Affiliations
Giuliana Fiorentino, INAF - Osservatorio Astronomico di Bologna (Italy)
Davide Massari, INAF - Osservatorio Astronomico di Bologna (Italy)
Univ. of Groningen (Netherlands)
Alan McConnachie, Herzberg Astronomy and Astrophysics, National Research Council Canada (Canada)
Peter B. Stetson, Herzberg Astronomy and Astrophysics, National Research Council Canada (Canada)
Giuseppe Bono, Univ. di Roma "Tor Vergata" (Italy)
INAF - Osservatorio Astronomico di Roma (Italy)
Paolo Turri, Herzberg Astronomy and Astrophysics, National Research Council Canada (Canada)
Univ. of Victoria (Canada)
David Andersen, Herzberg Astronomy and Astrophysics, National Research Council Canada (Canada)
Jean-Pierre Veran, Herzberg Astronomy and Astrophysics, National Research Council Canada (Canada)
Emiliano Diolaiti, INAF - Osservatorio Astronomico di Bologna (Italy)
Laura Schreiber, INAF - Osservatorio Astronomico di Bologna (Italy)
Paolo Ciliegi, INAF - Osservatorio Astronomico di Bologna (Italy)
Michele Bellazzini, INAF - Osservatorio Astronomico di Bologna (Italy)
Eline Tolstoy, Univ. of Groningen (Netherlands)
Matteo Monelli, Instituto de Astrofísica de Canarias (Spain)
Giacinto Iannicola, INAF - Osservatorio Astronomico di Roma (Italy)
Ivan Ferraro, INAF - Osservatorio Astronomico di Roma (Italy)
Vincenzo Testa, INAF - Osservatorio Astronomico di Roma (Italy)


Published in SPIE Proceedings Vol. 9909:
Adaptive Optics Systems V
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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