Self-scanned photodiode array - High performance operation in high dispersion astronomical spectrophotometry

Physics – Optics

Scientific paper

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Astronomical Spectroscopy, Optical Scanners, Photodiodes, Spectrophotometry, Microchannels, Radiation Detectors, Silicon Junctions, Wave Dispersion

Scientific paper

A multichannel spectrophotometric detector system has been developed using a 1024 element self-scanned silicon photodiode array, which is now in routine operation with the high-dispersion coude spectrograph of the University of Texas McDonald Observatory 2.7-m telescope. Operational considerations in the use of such arrays for high precision and low light level spectrophotometry are discussed. A detailed description of the system is presented. Performance of the detector as measured in the laboratory and on astronomical program objects is described, and it is shown that these arrays are highly effective detectors for high dispersion astronomical spectroscopy.

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