14 July 2010 Design, performance, and early results from extremely high Doppler precision instruments in a global network
Author Affiliations +
Abstract
We report design, performance and early results from two of the Extremely High Precision Extrasolar Planet Tracker Instruments (EXPERT) as part of a global network for hunting for low mass planets in the next decade. EXPERT is a combination of a thermally compensated monolithic Michelson interferometer and a cross-dispersed echelle spectrograph for extremely high precision Doppler measurements for nearby bright stars (e.g., 1m/s for a V=8 solar type star in 15 min exposure). It has R=18,000 with a 72 micron slit and a simultaneous coverage of 390-694 nm. The commissioning results show that the instrument has already produced a Doppler precision of about 1 m/s for a solar type star with S/N~100 per pixel. The instrument has reached ~4 mK (P-V) temperature stability, ~1 mpsi pressure stability over a week and a total instrument throughput of ~30% at 550 nm from the fiber input to the detector. EXPERT also has a direct cross-dispersed echelle spectroscopy mode fed with 50 micron fibers. It has spectral resolution of R=27,000 and a simultaneous wavelength coverage of 390-1000 nm.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jian Ge, Jian Ge, Bo Zhao, Bo Zhao, John Groot, John Groot, Liang Chang, Liang Chang, Frank Varosi, Frank Varosi, Xiaoke Wan, Xiaoke Wan, Scott Powell, Scott Powell, Peng Jiang, Peng Jiang, Kevin Hanna, Kevin Hanna, Ji Wang, Ji Wang, Rohan Pais, Rohan Pais, Jian Liu, Jian Liu, Liming Dou, Liming Dou, Sidney Schofield, Sidney Schofield, Shaun McDowell, Shaun McDowell, Erin Costello, Erin Costello, Adriana Delgado-Navarro, Adriana Delgado-Navarro, Scott Fleming, Scott Fleming, Brian Lee, Brian Lee, Sandeep Reddy Bollampally, Sandeep Reddy Bollampally, Troy Bosman, Troy Bosman, Hali Jakeman, Hali Jakeman, Adam Fletcher, Adam Fletcher, Gabriel Marquez, Gabriel Marquez, } "Design, performance, and early results from extremely high Doppler precision instruments in a global network", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77350H (14 July 2010); doi: 10.1117/12.857366; https://doi.org/10.1117/12.857366
PROCEEDINGS
12 PAGES


SHARE
Back to Top