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Proceedings Paper

On-sky commissioning of Hamamatsu CCDs in GMOS-S
Author(s): German Gimeno; Katherine Roth; Kristin Chiboucas; Pascale Hibon; Luc Boucher; John White; Matthew Rippa; Kathleen Labrie; James Turner; Kevin Hanna; Manuel Lazo; Gabriel Pérez; Rolando Rogers; Roberto Rojas; Vinicius Placco; Richard Murowinski
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Paper Abstract

GMOS-S has been recently upgraded with Hamamatsu deep depletion CCDs, replacing the original EEV detector array. The new CCDs have superior quantum efficiency (QE) at wavelengths longer than 680nm, with significant sensitivity extending beyond 1 micron. Furthermore, the fringing level in GMOS-S data is now much lower due to the much thicker CCDs, additionally improving delivered sensitivity above that afforded by quantum efficiency alone. Soon after the Hamamatsu CCDs were installed in June 2014, some issues were noticed that impacted the ability to execute some science programs. In October 2015 the ARC controller electronics were upgraded and a cable was replaced, and since November 2015 GMOS-S has again been taking science data with the Hamamatsu detectors with no sign of the previous limitations. We present the results of the GMOS-S on-sky commissioning of the Hamamatsu detector array, and provide an update on the status of the GMOS-N portion of the project.

Paper Details

Date Published: 9 August 2016
PDF: 14 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99082S (9 August 2016); doi: 10.1117/12.2233883
Show Author Affiliations
German Gimeno, Gemini Observatory (Chile)
Katherine Roth, Gemini Observatory (United States)
Kristin Chiboucas, Gemini Observatory (United States)
Pascale Hibon, European Southern Observatory (Chile)
Luc Boucher, Gemini Observatory (Chile)
John White, Gemini Observatory (United States)
Matthew Rippa, Gemini Observatory (United States)
Kathleen Labrie, Gemini Observatory (United States)
James Turner, Gemini Observatory (Chile)
Kevin Hanna, USRA-SOFIA (United States)
Manuel Lazo, Gemini Observatory (Chile)
Gabriel Pérez, Gemini Observatory (Chile)
Rolando Rogers, Gemini Observatory (Chile)
Roberto Rojas, Gemini Observatory (Chile)
Vinicius Placco, Univ. of Notre Dame (United States)
Richard Murowinski, NRC - Herzberg Astronomy & Astrophysics (Canada)

Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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