Large-format infrared arrays are enablers for a variety of astronomical applications, from wide-field imaging to very high-resolution spectroscopy over a wide range of wavelength. We present the optimization of the science-grade H4RG array used in the SPIRou high-resolution spectrograph designed for high-precision velocity measurements. In SPIRou nominal science operation, the array is used in a relatively low flux regime, well below the full-well of the arrays and, for some applications, the readout noise is a major contributor to the overall signal-to-noise budget. We describe the detector fine-tuning process as well as the derived properties and their impact on performances. We identify persistence as potentially problematic under certain circumstances for infrared m/s velocimetry.
Étienne Artigau, Jonathan Saint-Antoine, Pierre-Luc Lévesque, Philippe Vallée, René Doyon, Olivier Hernandez, and Claire Moutou, "H4RG characterization for high-resolution infrared spectroscopy," Proc. SPIE 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII, 107091P (Presented at SPIE Astronomical Telescopes + Instrumentation: June 13, 2018; Published: 12 July 2018); https://doi.org/10.1117/12.2314475.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the proceedings. They include the speaker's narration with video of the slides and animations. Most include full-text papers. Interactive, searchable transcripts and closed captioning are now available for most presentations.
Search our growing collection of more than 22,000 conference presentations, including many plenaries and keynotes.