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Proceedings Paper

Imaging the dense stellar cluster R136 with VLT-MAD
Author(s): M. A. Campbell; C. J. Evans; J. Ascenso; A. J. Longmore; J. Kolb; M. Gieles; J. Alves
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Paper Abstract

We evaluate the performance of the Multi-conjugate Adaptive optics Demonstrator (MAD) from H and Ks imaging of 30 Doradus in the Large Magellanic Cloud. Maps of the full-width half maximum (FWHM) of point sources in the H and Ks images are presented, together with maps of the Strehl ratio achieved in the Ks-band observations. Each of the three natural guide stars was at the edge of the MAD field-of-view, and the observations were obtained at relatively large airmass (1.4-1.6). Even so, the Strehl ratio achieved in the second pointing (best-placed compared to the reference stars) ranged from 15% to an impressive 30%. Preliminary photometric calibration of the first pointing indicates 5σ sensitivities of Ks~21.75 and H~22.25 (from 22 and 12 min exposures, respectively).

Paper Details

Date Published: 10 July 2008
PDF: 9 pages
Proc. SPIE 7015, Adaptive Optics Systems, 70152C (10 July 2008); doi: 10.1117/12.788964
Show Author Affiliations
M. A. Campbell, Institute of Astronomy, The Univ. of Edinburgh, Royal Observatory (United Kingdom)
C. J. Evans, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)
J. Ascenso, Ctr. de Astrofísica, Univ. do Porto (Portugal)
A. J. Longmore, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)
J. Kolb, European Southern Observatory (Germany)
M. Gieles, European Southern Observatory (Chile)
J. Alves, Calar Alto Observatory - Ctr. Astronomico Hispano-Alemán (Spain)

Published in SPIE Proceedings Vol. 7015:
Adaptive Optics Systems
Norbert Hubin; Claire E. Max; Peter L. Wizinowich, Editor(s)

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