Fiber-stabilized PSF for sub-m/s Doppler precision at Lick Observatory

J. F P Spronck; C. Schwab; D. A. Fischer

doi:10.1117/12.856487

Fiber-stabilized PSF for sub-m/s Doppler precision at Lick Observatory

J. F P Spronck, C. Schwab, D. A. Fischer

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

5 Citations (Scopus)

Abstract

The detection of Earth analogues requires extreme Doppler precision and long term stability in order to measure tiny reflex velocities in the host star. The PSF from the spectrometer should be slowly varying with temperature and pressure changes. However, variations in the illumination of the slit and of the spectrograph optics occur on time scales of seconds, primarily because of guiding errors, but also on timescales of minutes, because of changes in the focus or seeing. These variations yield differences in the PSF from observation to observation, which are currently limiting the Doppler precision. Here, we present the design of a low cost fiber optic feed, FINDS, used to stabilize the PSF of the Hamilton spectrograph of Lick observatory along with the first measurements that show dramatic improvement in stability.

Original language	English
Title of host publication	Ground-Based and Airborne Instrumentation for Astronomy III
Place of Publication	Washington, DC
Publisher	SPIE
Pages	1-6
Number of pages	6
Volume	7735
Edition	PART 1
ISBN (Print)	9780819482259
DOIs	https://doi.org/10.1117/12.856487
Publication status	Published - 2010
Externally published	Yes
Event	Ground-Based and Airborne Instrumentation for Astronomy III - San Diego, CA, United States Duration: 27 Jun 2010 → 2 Jul 2010

Other

Other	Ground-Based and Airborne Instrumentation for Astronomy III
Country/Territory	United States
City	San Diego, CA
Period	27/06/10 → 2/07/10

Keywords

Astronomical optics
Exoplanet detection
Fiber scrambling
Radial velocity
Spectrographs

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10.1117/12.856487

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title = "Fiber-stabilized PSF for sub-m/s Doppler precision at Lick Observatory",

abstract = "The detection of Earth analogues requires extreme Doppler precision and long term stability in order to measure tiny reflex velocities in the host star. The PSF from the spectrometer should be slowly varying with temperature and pressure changes. However, variations in the illumination of the slit and of the spectrograph optics occur on time scales of seconds, primarily because of guiding errors, but also on timescales of minutes, because of changes in the focus or seeing. These variations yield differences in the PSF from observation to observation, which are currently limiting the Doppler precision. Here, we present the design of a low cost fiber optic feed, FINDS, used to stabilize the PSF of the Hamilton spectrograph of Lick observatory along with the first measurements that show dramatic improvement in stability.",

keywords = "Astronomical optics, Exoplanet detection, Fiber scrambling, Radial velocity, Spectrographs",

author = "Spronck, {J. F P} and C. Schwab and Fischer, {D. A.}",

year = "2010",

doi = "10.1117/12.856487",

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note = "Ground-Based and Airborne Instrumentation for Astronomy III ; Conference date: 27-06-2010 Through 02-07-2010",

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Spronck, JFP, Schwab, C & Fischer, DA 2010, Fiber-stabilized PSF for sub-m/s Doppler precision at Lick Observatory. in Ground-Based and Airborne Instrumentation for Astronomy III. PART 1 edn, vol. 7735, 77350W, SPIE, Washington, DC, pp. 1-6, Ground-Based and Airborne Instrumentation for Astronomy III, San Diego, CA, United States, 27/06/10. https://doi.org/10.1117/12.856487

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T1 - Fiber-stabilized PSF for sub-m/s Doppler precision at Lick Observatory

AU - Spronck, J. F P

AU - Schwab, C.

AU - Fischer, D. A.

PY - 2010

Y1 - 2010

N2 - The detection of Earth analogues requires extreme Doppler precision and long term stability in order to measure tiny reflex velocities in the host star. The PSF from the spectrometer should be slowly varying with temperature and pressure changes. However, variations in the illumination of the slit and of the spectrograph optics occur on time scales of seconds, primarily because of guiding errors, but also on timescales of minutes, because of changes in the focus or seeing. These variations yield differences in the PSF from observation to observation, which are currently limiting the Doppler precision. Here, we present the design of a low cost fiber optic feed, FINDS, used to stabilize the PSF of the Hamilton spectrograph of Lick observatory along with the first measurements that show dramatic improvement in stability.

AB - The detection of Earth analogues requires extreme Doppler precision and long term stability in order to measure tiny reflex velocities in the host star. The PSF from the spectrometer should be slowly varying with temperature and pressure changes. However, variations in the illumination of the slit and of the spectrograph optics occur on time scales of seconds, primarily because of guiding errors, but also on timescales of minutes, because of changes in the focus or seeing. These variations yield differences in the PSF from observation to observation, which are currently limiting the Doppler precision. Here, we present the design of a low cost fiber optic feed, FINDS, used to stabilize the PSF of the Hamilton spectrograph of Lick observatory along with the first measurements that show dramatic improvement in stability.

KW - Astronomical optics

KW - Exoplanet detection

KW - Fiber scrambling

KW - Radial velocity

KW - Spectrographs

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DO - 10.1117/12.856487

M3 - Conference proceeding contribution

AN - SCOPUS:78149250733

SN - 9780819482259

VL - 7735

SP - 1

EP - 6

BT - Ground-Based and Airborne Instrumentation for Astronomy III

PB - SPIE

CY - Washington, DC

T2 - Ground-Based and Airborne Instrumentation for Astronomy III

Y2 - 27 June 2010 through 2 July 2010

ER -

Fiber-stabilized PSF for sub-m/s Doppler precision at Lick Observatory

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