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

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; Scott A. Diddams

doi:10.1117/1.JATIS.5.4.041511

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

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, Scott A. Diddams

Author Affiliations +

Funded by: Division of Astronomical Sciences (AST), Heising-Simons Foundation, NASA James Webb Space Telescope, NASA Astrobiology Institute

Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 5, Issue 4, 041511 (October 2019). https://doi.org/10.1117/1.JATIS.5.4.041511

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.

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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

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