High-precision calibration of spectrographs using laser frequency combs

被引：2

作者：

Wilken, Tobias ^{[1
]}

Lovis, Christophe ^{[2
]}

Manescau, Antonio ^{[3
]}

Steinmetz, Tilo ^{[1
]}

Pasquini, Luca ^{[3
]}

Lo Curto, Gaspare ^{[3
]}

Haensch, Theodor W. ^{[1
]}

Holzwarth, Ronald ^{[1
]}

Udem, Thomas ^{[1
]}

机构：

[1] Max Planck Inst Quantenoopt, Hans Kopfermann Str 1, D-85748 Garching, Germany

[2] Observ Geneva, CH-1290 Sauverny, Switzerland

[3] European So Observat, D-85748 Garching, Germany

来源：

GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY III | 2010年 / 7735卷

关键词：

exo-planet search; radial velocity measurement; high resolution spectrograph; laser frequency comb; FINE-STRUCTURE CONSTANT; COSMOLOGICAL VARIATION; MASS-RATIO; ELECTRON; NOISE;

D O I：

10.1117/12.857248

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first stringent tests of a novel calibration system based on a laser frequency comb (LFC) for radial velocity measurements. The tests were obtained with the high resolution, optical HARPS spectrograph. Photon noise limited repeatability of 9 cm s(-1) was obtained, using only little more than one of 72 echelle orders. In the calibration curve CCD inhomogeneities showed up and could be calibrated, which were undetectable with previous Th-Ar calibrations. To obtain an even higher repeatability and lower residuals, a larger spectral bandwidth is necessary. An improved version of the LFC is currently under development. The results of the latest tests will be presented.

引用

页数：8

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