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We present the InGaAs detector system of the Wide-Field Infrared Transient Explorer (WINTER), a new infrared instrument operating on a 1 meter robotic telescope at the Palomar Observatory. These commercially produced sensors are cooled to -50 °C by a thermo-electric cooler integrated into a room temperature package. These warm InGaAs sensors represent a dramatic reduction in cost and complexity over HgCdTe systems and achieve sky background-limited performance across our science bands for exposures greater than a few seconds. We present the design and implementation of the WINTER detector system and readout electronics.
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Andrew C. Malonis, Nathan P. Lourie, Gábor Fűrész, Danielle Frostig, Erik Hinrichsen, Robert Simcoe, "Detector architecture of the wide-field infrared transient explorer (WINTER) InGaAs camera," Proc. SPIE 11454, X-Ray, Optical, and Infrared Detectors for Astronomy IX, 114542O (13 December 2020); https://doi.org/10.1117/12.2561228