The Habitable-zone Planet Finder: A status update on the development of a stabilized fiber-fed near-infrared spectrograph for the for the Hobby-Eberly telescope

Suvrath Mahadevan; Lawrence W. Ramsey; Ryan Terrien; Samuel Halverson; Arpita Roy; Fred Hearty; Eric Levi; Gudmundur Kari Stefansson; Paul Robertson; Chad Bender; Chris Schwab; Matt Nelson

doi:10.1117/12.2056417

24 July 2014 The Habitable-zone Planet Finder: A status update on the development of a stabilized fiber-fed near-infrared spectrograph for the for the Hobby-Eberly telescope

Suvrath Mahadevan, Lawrence W. Ramsey, Ryan Terrien, Samuel Halverson, Arpita Roy, Fred Hearty, Eric Levi, Gudmundur Kari Stefansson, Paul Robertson, Chad Bender, Chris Schwab, Matt Nelson

Author Affiliations +

Proceedings Volume 9147, Ground-based and Airborne Instrumentation for Astronomy V; 91471G (2014) https://doi.org/10.1117/12.2056417
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The Habitable-Zone Planet Finder is a stabilized, fiber-fed, NIR spectrograph being built for the 10m Hobby- Eberly telescope (HET) that will be capable of discovering low mass planets around M dwarfs. The optical design of the HPF is a white pupil spectrograph layout in a vacuum cryostat cooled to 180 K. The spectrograph uses gold-coated mirrors, a mosaic echelle grating, and a single Teledyne Hawaii-2RG (H2RG) NIR detector with a 1.7-micron cutoff covering parts of the information rich z, Y and J NIR bands at a spectral resolution of R∼50,000. The unique design of the HET requires attention to both near and far-field fiber scrambling, which we accomplish with double scramblers and octagonal fibers. In this paper we discuss and summarize the main requirements and challenges of precision RV measurements in the NIR with HPF and how we are overcoming these issues with technology, hardware and algorithm developments to achieve high RV precision and address stellar activity.

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Suvrath Mahadevan, Lawrence W. Ramsey, Ryan Terrien, Samuel Halverson, Arpita Roy, Fred Hearty, Eric Levi, Gudmundur Kari Stefansson, Paul Robertson, Chad Bender, Chris Schwab, and Matt Nelson "The Habitable-zone Planet Finder: A status update on the development of a stabilized fiber-fed near-infrared spectrograph for the for the Hobby-Eberly telescope", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91471G (24 July 2014); https://doi.org/10.1117/12.2056417

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