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Imaging the dense stellar cluster R136 with VLT-MAD

Campbell, MA, Evans, CJ, Ascenso, J, Longmore, AJ, Kolb, J, Gieles, M and Alves, J (2008) Imaging the dense stellar cluster R136 with VLT-MAD Proceedings of SPIE.

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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 5 sigma sensitivities of Ks=21.75 and H=22.25 (from 22 and 12 min exposures, respectively).

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Campbell, MA
Evans, CJ
Ascenso, J
Longmore, AJ
Kolb, J
Alves, J
Date : 1 July 2008
DOI : 10.1117/12.788964
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:40
Last Modified : 24 Jan 2020 22:38

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