Megacam: A Wide-Field CCD Imager for the MMT and Magellan

Megacam is a large-format optical camera that can be operated at the f/5 Cassegrain foci of the MMT on Mount Hopkins, Arizona, and the Magellan Clay telescope at Las Campanas Observatory, Chile. Megacam's focal plane is composed of 36 closely packed e2v CCD42-90 CCDs, each with 2048 × 4608 pixe...

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Veröffentlicht in:Publications of the Astronomical Society of the Pacific 2015-04, Vol.127 (950), p.366-382
Hauptverfasser: McLeod, Brian, Geary, John, Conroy, Maureen, Fabricant, Daniel, Ordway, Mark, Szentgyorgyi, Andrew, Amato, Stephen, Ashby, Matthew, Caldwell, Nelson, Curley, Dylan, Gauron, Thomas, Holman, Matthew, Norton, Timothy, Pieri, Mario, Roll, John, Weaver, David, Zajac, Joseph, Palunas, Povilas, Osip, David
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Sprache:eng
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Zusammenfassung:Megacam is a large-format optical camera that can be operated at the f/5 Cassegrain foci of the MMT on Mount Hopkins, Arizona, and the Magellan Clay telescope at Las Campanas Observatory, Chile. Megacam's focal plane is composed of 36 closely packed e2v CCD42-90 CCDs, each with 2048 × 4608 pixels, assembled in an 18,432 × 18,432 array. Two additional CCD42-90s are provided for autoguiding and focus control. The CCDs have 13.5 μm square pixels that subtend at the f/5 foci, yielding a 25′ × 25′ field-of-view. The camera system includes a focal plane shutter, two filter wheels, two liquid nitrogen reservoirs, a central chamber that holds the CCD mosaic array, and two electronics boxes. Megacam is equipped with a variety of broadband and narrowband filters. Software features include automatic calculation of twilight flat exposure times.
ISSN:0004-6280
1538-3873
DOI:10.1086/680687