Optimal resolutions for IR spectroscopy through the OH airglow

Paul Martini; Darren L. DePoy

doi:10.1117/12.395526

16 August 2000 Optimal resolutions for IR spectroscopy through the OH airglow

Paul Martini, Darren L. DePoy

Proceedings Volume 4008, Optical and IR Telescope Instrumentation and Detectors; (2000) https://doi.org/10.1117/12.395526
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

The OH airglow emission lines are the dominant source of background emission in the near-IR J and H bandpasses. In principle, these emission lines can be avoided by observing at sufficiently high spectral resolution, rejecting pixels contaminated by OH lines, and rebinning to the desired resolution. Two trade-offs to this approach are non- negligible detector noise per pixel and the added expense of instrumentation with higher resolution. In this contribution, we simulate various observed and desired resolutions as a function of detector noise and target brightness to develop a set of guidelines for the optimal resolution in a variety of observing programs. As a general rule, observing at a 2-pixel resolution of 2000-4000 provides optimal OH rejection for a wide range of detector noise and source signal.

Citation Download Citation

Paul Martini and Darren L. DePoy "Optimal resolutions for IR spectroscopy through the OH airglow", Proc. SPIE 4008, Optical and IR Telescope Instrumentation and Detectors, (16 August 2000); https://doi.org/10.1117/12.395526

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