Echelle Simulation for the High-resolution Infrared Spectrograph for Exoplanet Characterization (HISPEC) at Keck

Aidan Gibbs*, Michael Fitzgerald, Dimitri Mawet, Quinn Konopacky, Ashley Baker, Björn Benneke, Daniel Echeverri, Sofia Hillman, Maxwell A. Millar-Blanchaer, Stefan Pelletier, Saavidra Perera, Ben Sappey, Jason Wang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


The High-resolution Infrared Spectrograph for Exoplanet Characterization (HISPEC) is a diffraction limited, single-mode fiber fed spectrograph with R > 100, 000 in design for the Keck II telescope. It will also serve as part of the first light Multi-Object Diffraction-limited High-resolution Infrared Spectrograph (MODHIS) facility for the Thirty Meter Telescope (TMT). HISPEC will simultaneously observe from the y to K bands to explore transiting, non-transiting, and high-contrast sub-stellar companions, in addition to non-planetary science. For high-contrast planetary targets near the diffraction-limit, we perform echelle simulations using the latest HISPEC optical designs to model system performance with respect to anticipated scientific yields. Starting from the optical model, we propagate light through the system to generate a full-frame simulated echelle image. Noise sources are handled using modifications of existing software packages, including Pyechelle for optical aberrations and photon noise, our own PSISIM package for astrophysical, background, and throughput noise sources, and HxRG Noise Generator for detector noise. These simulated echelle images will serve as a test bed for the HISPEC data reduction pipeline in development from the existing Keck Planetary Imager and Characterizer (KPIC) instrument pipeline, a platform for trade studies in instrument design, and a validation of exoplanetary science goals in the high-contrast regime.

Original languageEnglish (US)
Title of host publicationGround-based and Airborne Instrumentation for Astronomy IX
EditorsChristopher J. Evans, Julia J. Bryant, Kentaro Motohara
ISBN (Electronic)9781510653498
StatePublished - 2022
EventGround-based and Airborne Instrumentation for Astronomy IX 2022 - Montreal, Canada
Duration: Jul 17 2022Jul 22 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceGround-based and Airborne Instrumentation for Astronomy IX 2022


  • High Resolution
  • Infrared
  • Keck
  • Simulation
  • Spectrograph
  • Spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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