Upgraded GMOS-N science detectors: schedule and commissioning plans

Katherine C. Roth; Scot J. Kleinman; E. Rodrigo Carrasco; Timothy J. Davidge; Roberto G. Abraham

doi:10.1117/12.857926

20 July 2010 Upgraded GMOS-N science detectors: schedule and commissioning plans

Katherine C. Roth, Scot J. Kleinman, E. Rodrigo Carrasco, Timothy J. Davidge, Roberto G. Abraham

Proceedings Volume 7735, Ground-based and Airborne Instrumentation for Astronomy III; 773580 (2010) https://doi.org/10.1117/12.857926
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

We present plans for the commissioning of the new GMOS-N red-sensitive science detectors, currently being integrated into a new focal plane assembly at the NRC HIA. These Hamamatsu CCDs provide significantly higher quantum efficiency than the existing detectors at red optical wavelengths (longward of ~ 700 nm), with > 80% QE at 900 nm falling to ~10% QE at 1.05 μm. This upgrade not only improves current operations with GMOS-N, but also opens new spectral ranges and potential observing modes (eg. use with Altair, the Gemini-N AO module). Care has been taken to ensure that Nod & Shuffle will still be supported, since accurate sky subtraction is increasingly important at longer wavelengths due to the increased density of sky lines. The commissioning plan aims to demonstrate the improvement in current modes while minimizing the period of GMOS-N downtime for science use. The science commissioning is currently scheduled for mid-November 2010.

Citation Download Citation

Katherine C. Roth, Scot J. Kleinman, E. Rodrigo Carrasco, Timothy J. Davidge, and Roberto G. Abraham "Upgraded GMOS-N science detectors: schedule and commissioning plans", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 773580 (20 July 2010); https://doi.org/10.1117/12.857926

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