Performance modeling of an upgraded NIRSPEC on Keck

Emily C. Martin; Michael P. Fitzgerald; Ian S. McLean; Sean M. Adkins; Ted Aliado; George Brims; Chris Johnson; Ken Magnone; Eric Wang; Jason Weiss

doi:10.1117/12.2056896

28 July 2014 Performance modeling of an upgraded NIRSPEC on Keck

Emily C. Martin, Michael P. Fitzgerald, Ian S. McLean, Sean M. Adkins, Ted Aliado, George Brims, Chris Johnson, Ken Magnone, Eric Wang, Jason Weiss

Author Affiliations +

Proceedings Volume 9147, Ground-based and Airborne Instrumentation for Astronomy V; 914781 (2014) https://doi.org/10.1117/12.2056896
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

NIRSPEC is a high-resolution near-infrared (1-5 micron) echelle spectrometer in use on the Keck II telescope. We are designing an upgrade to the spectrometer, and here we present modeling for the expected performance of the upgraded system. The planned upgrade will (1) replace the Aladdin III science detector with a Teledyne H2RG, (2) update the slitviewing camera (SCAM) detector to an H1RG and replace the optics, and (3) upgrade the instrument control electronics. The new spectrometer detector has smaller pixels but a larger format, and its improved noise characteristics will provide a dramatic increase in sensitivity, especially between OH lines in H-band and shorter wavelengths. Optical modeling shows that the upgraded system is expected to achieve higher spectral resolution and a larger spectral grasp. Also, preliminary modeling of the SCAM optical design aims to permit operation from 1-5 μm, overcoming a limitation with the existing system.

Citation Download Citation

Emily C. Martin, Michael P. Fitzgerald, Ian S. McLean, Sean M. Adkins, Ted Aliado, George Brims, Chris Johnson, Ken Magnone, Eric Wang, and Jason Weiss "Performance modeling of an upgraded NIRSPEC on Keck", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 914781 (28 July 2014); https://doi.org/10.1117/12.2056896

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