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26 October 2019 Impact of crosshatch patterns in H2RGs on high-precision radial velocity measurements: exploration of measurement and mitigation paths with the Habitable-Zone Planet Finder
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Abstract

Teledyne’s H2RG detector images suffer from crosshatch like patterns, which arise from subpixel quantum efficiency (QE) variation. We present our measurements of this subpixel QE variation in the Habitable-Zone Planet Finder’s H2RG detector. We present a simple model to estimate the impact of subpixel QE variations on the radial velocity and how a first-order correction can be implemented to correct for the artifact in the spectrum. We also present how the HPF’s future upgraded laser frequency comb will enable us to implement this correction.

© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE) 2329-4124/2019/$28.00 © 2019 SPIE
Joe P. Ninan, Suvrath Mahadevan, Gudmundur Stefansson, Chad Bender, Arpita Roy, Kyle F. Kaplan, Connor Fredrick, Andrew J. Metcalf, Andrew Monson, Ryan Terrien, Lawrence W. Ramsey, and Scott A. Diddams "Impact of crosshatch patterns in H2RGs on high-precision radial velocity measurements: exploration of measurement and mitigation paths with the Habitable-Zone Planet Finder," Journal of Astronomical Telescopes, Instruments, and Systems 5(4), 041511 (26 October 2019). https://doi.org/10.1117/1.JATIS.5.4.041511
Received: 10 April 2019; Accepted: 8 October 2019; Published: 26 October 2019
JOURNAL ARTICLE
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