Gemini North Multi-Object Spectrograph (GMOS-N) Interim CCDs Upgrade: Commissioning Results I

Details Gemini North Multi-Object Spectrograph (GMOS-N) Interim CCDs Upgrade: Commissioning Results I Gemini North Multi-Object Spectrograph (GMOS-N) Interim CCDs Upgrade: Commissioning Results I

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21942217c&link_type=abstract

American Astronomical Society, AAS Meeting #219, #422.17

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Scientific paper

The Gemini GMOS-North CCDs are undergoing a succession of upgrades to improve sensitivity, particularly in the red. In late fall 2011, the original GMOS-N E2V CCDs were replaced with deep depletion E2V devices. The array consists of three 2048x4608 CCD chips in the same layout as the original CCDs, having enhanced blue and red response. The improvement in QE is > 50% at 400nm and > 90% at 900nm, with sensitivity extending redward of 950nm. In addition, fringing is much less than with the original CCDs. Other properties, including noise characteristics, pixel scale, and readout time are similar to the original CCDs. We present a comparison of imaging obtained with the original and deep depletion E2V CCDs, highlighting the realized gains in increased red sensitivity and reduced fringing.

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