Stellar photometry with multi conjugate adaptive optics

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

doi:10.1117/12.2234448

26 July 2016 Stellar photometry with multi conjugate adaptive optics

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

Author Affiliations +

Proceedings Volume 9909, Adaptive Optics Systems V; 990906 (2016) https://doi.org/10.1117/12.2234448
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

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 K_s ∼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.

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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, and Vincenzo Testa "Stellar photometry with multi conjugate adaptive optics", Proc. SPIE 9909, Adaptive Optics Systems V, 990906 (26 July 2016); https://doi.org/10.1117/12.2234448

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