Imaging the dense stellar cluster R136 with VLT-MAD

M. A. Campbell; C. J. Evans; J. Ascenso; A. J. Longmore; J. Kolb; M. Gieles; J. Alves

doi:10.1117/12.788964

10 July 2008 Imaging the dense stellar cluster R136 with VLT-MAD

M. A. Campbell, C. J. Evans, J. Ascenso, A. J. Longmore, J. Kolb, M. Gieles, J. Alves

Proceedings Volume 7015, Adaptive Optics Systems; 70152C (2008) https://doi.org/10.1117/12.788964
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

We evaluate the performance of the Multi-conjugate Adaptive optics Demonstrator (MAD) from H and K_s imaging of 30 Doradus in the Large Magellanic Cloud. Maps of the full-width half maximum (FWHM) of point sources in the H and K_s images are presented, together with maps of the Strehl ratio achieved in the K_s-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 K_s~21.75 and H~22.25 (from 22 and 12 min exposures, respectively).

Citation Download Citation

M. A. Campbell, C. J. Evans, J. Ascenso, A. J. Longmore, J. Kolb, M. Gieles, and J. Alves "Imaging the dense stellar cluster R136 with VLT-MAD", Proc. SPIE 7015, Adaptive Optics Systems, 70152C (10 July 2008); https://doi.org/10.1117/12.788964

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