کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7925603 | 1512508 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Wavelength calibration with PMAS at 3.5Â m Calar Alto Telescope using a tunable astro-comb
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Wavelength calibration with PMAS at 3.5Â m Calar Alto Telescope using a tunable astro-comb Wavelength calibration with PMAS at 3.5Â m Calar Alto Telescope using a tunable astro-comb](/preview/png/7925603.png)
چکیده انگلیسی
On-sky tests conducted with an astro-comb using the Potsdam Multi-Aperture Spectrograph (PMAS) at the 3.5Â m Calar Alto Telescope are reported. The proposed astro-comb approach is based on cascaded four-wave mixing between two lasers propagating through dispersion optimized nonlinear fibers. This approach allows for a line spacing that can be continuously tuned over a broad range (from tens of GHz to beyond 1Â THz) making it suitable for calibration of low- medium- and high-resolution spectrographs. The astro-comb provides 300 calibration lines and his line-spacing is tracked with a wavemeter having 0.3 pm absolute accuracy. First, we assess the accuracy of Neon calibration by measuring the astro-comb lines with (Neon calibrated) PMAS. The results are compared with expected line positions from wavemeter measurement showing an offset of â¼5-20Â pm (4%-16% of one resolution element). This might be the footprint of the accuracy limits from actual Neon calibration. Then, the astro-comb performance as a calibrator is assessed through measurements of the Ca triplet from stellar objects HD3765 and HD219538 as well as with the sky line spectrum, showing the advantage of the proposed astro-comb for wavelength calibration at any resolution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 415, 15 May 2018, Pages 186-193
Journal: Optics Communications - Volume 415, 15 May 2018, Pages 186-193
نویسندگان
J.M. Chavez Boggio, T. Fremberg, D. Bodenmüller, C. Sandin, M. Zajnulina, A. Kelz, D. Giannone, M. Rutowska, B. Moralejo, M.M. Roth, M. Wysmolek, H. Sayinc,