End to end modeling of SCALES spectrograph for Keck Observatory

Arun Surya; Renate Kupke; Deno Stelter; Philip Hinz; Amirul Hasan; Andrew Skemer; Stephanie Sallum; Thirupathi Sivarani; Ravinder Banyal

doi:10.1117/12.2677759

6 October 2023 End to end modeling of SCALES spectrograph for Keck Observatory

Arun Surya, Renate Kupke, Deno Stelter, Philip Hinz, Amirul Hasan, Andrew Skemer, Stephanie Sallum, Thirupathi Sivarani, Ravinder Banyal

Author Affiliations +

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 1268005 (2023) https://doi.org/10.1117/12.2677759
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The SCALES instrument is a high-contrast imager and integral field spectrograph that operates in the infrared region and is intended to be utilized behind the W.M. Keck Observatory's adaptive optics system. The SCALES integral field spectrograph operates over a broad wavelength range from 2.0 to 5.0 µm. The instrument includes a microlens array-based integral field spectrograph that, when combined with a lenslet to slicer reformatter referred to as "slenslit," allows for low (R = 35 - 250) and moderate (R = 2000 - 6500) spectral resolution spectroscopy. We have done extensive end-to-end modeling of the SCALES optical path using both geometric optics and physical optics. This analysis has been vital in predicting both spectral format and optical performance. We have also combined the predicted geometric point spread function (PSF) given a complete end-to-end system including the SCALES lenslet array IFU, with modeled diffraction effects to understand the crosstalk between the spectra. The PSF modeling is being integrated with the SCALES instrument simulator to provide realistic data products that are being used to develop the SCALES data pipeline.

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(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Arun Surya, Renate Kupke, Deno Stelter, Philip Hinz, Amirul Hasan, Andrew Skemer, Stephanie Sallum, Thirupathi Sivarani, and Ravinder Banyal "End to end modeling of SCALES spectrograph for Keck Observatory", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 1268005 (6 October 2023); https://doi.org/10.1117/12.2677759

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KEYWORDS

Spectrographs

Modeling

Keck Observatory

Equipment

Point spread functions

Data modeling

Geometrical optics

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