Now showing items 1-6 of 6

• An astro-comb calibrated solar telescope to search for the radial velocity signature of Venus ﻿

(2016)
We recently demonstrated sub-m/s sensitivity in measuring the radial velocity (RV) between the Earth and Sun using a simple solar telescope feeding the HARPS-N spectrograph at the Italian National Telescope, which is ...
• Calibration of an Astrophysical Spectrograph Below 1 m/s Using a Laser Frequency Comb ﻿

(Optical Society of America, 2012)
We deployed two wavelength calibrators based on laser frequency combs (“astro-combs”) at an astronomical telescope. One astro- comb operated over a 100 nm band in the deep red (∼ 800 nm) and a second operated over a 20 nm ...
• Conjugate Fabry–Perot Cavity Pair for Improved Astro-Comb Accuracy ﻿

(Optical Society of America, 2012)
We propose a new astro-comb mode-filtering scheme composed of two Fabry–Perot cavities (coined “conjugate Fabry–Perot cavity pair”). Simulations indicate that this new filtering scheme makes the accuracy of astro-comb ...
• HARPS-N Observes the Sun as a Star ﻿

(IOP Publishing, 2015)
Radial velocity (RV) perturbations induced by stellar surface inhomogeneities including spots, plages and granules currently limit the detection of Earth-twins using Doppler spectroscopy. Such stellar noise is poorly ...
• In-Situ Determination of Astro-Comb Calibrator Lines to Better Than 10 cm $s^{-1}$ ﻿

(Optical Society of America (OSA), 2010)
Improved wavelength calibrators for high-resolution astrophysical spectrographs will be essential for precision radial velocity (RV) detection of Earth-like exoplanets and direct observation of cosmological deceleration. ...
• Visible Wavelength Astro-Comb ﻿

(Optical Society of America (OSA), 2010)
We demonstrate a tunable laser frequency comb operating near 420 nm with mode spacing of 20-50 GHz, usable bandwidth of 15 nm and output power per line of ~20 nW. Using the TRES spectrograph at the Fred Lawrence Whipple ...