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

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

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.

Original languageEnglish (US)
Article number041511
JournalJournal of Astronomical Telescopes, Instruments, and Systems
Volume5
Issue number4
DOIs
StatePublished - Oct 1 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Control and Systems Engineering
  • Instrumentation
  • Astronomy and Astrophysics
  • Mechanical Engineering
  • Space and Planetary Science

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