Comparison of AWGs and Echelle Gratings for Wavelength Division Multiplexing on Silicon-on-Insulator
IEEE Photonics Journal, 2014 We compare the performance (insertion loss and crosstalk) of silicon-based arrayed waveguide gratings (AWGs) and echelle gratings for different channel spacings.
S. Pathak +3 more
doaj +2 more sources
Optimal extraction of echelle spectra: Getting the most out of observations [PDF]
Astronomy & Astrophysics, 2020 Context. The price of instruments and observing time on modern telescopes is quickly increasing. Therefore, it is worth revisiting the data reduction algorithms to extract every bit of scientific information from available observations.
N. Piskunov, A. Wehrhahn, T. Marquart
semanticscholar +1 more source
Modeling the Echelle Spectra Continuum with Alpha Shapes and Local Regression Fitting [PDF]
Astronomical Journal, 2019 Continuum normalization of echelle spectra is an important data analysis step that is difficult to automate. Polynomial fitting requires a reasonably high-order model to follow the steep slope of the blaze function.
Xin Xu +4 more
semanticscholar +1 more source
New wavelength calibration for echelle spectrographs using Fabry-Pérot etalons [PDF]
Astronomy & Astrophysics, 2019 Context. The study of Earth-mass extrasolar planets via the radial-velocity technique and the measurement of the potential cosmological variability of fundamental constants call for very-high-precision spectroscopy at the level of δλ/λ < 10−9.
F. Cersullo +4 more
semanticscholar +1 more source
CERES: A Set of Automated Routines for Echelle Spectra [PDF]
, 2016 We present the Collection of Elemental Routines for Echelle Spectra (CERES). These routines were developed for the construction of automated pipelines for the reduction, extraction, and analysis of spectra acquired with different instruments, allowing ...
R. Brahm, A. Jord'an, N. Espinoza
semanticscholar +1 more source
Spectroscopic and photometric analysis of the early-type spectroscopic binary HD 161853 in the centre of an H II region [PDF]
, 2015 We study the O-type star HD 161853, which has been noted as a probable double-lined spectroscopic binary system. We secured high-resolution spectra of HD 161853 during the past nine years.
Alfaro, E. J. +8 more
core +4 more sources
Construction Logistics Centres Proposing Kitting Service: Organization Analysis and Cost Mapping
Buildings, 2021 The construction industry represents an important part of the global economy but is known for many issues such as harmful emissions, low productivity, waste generation, poor ergonomics, and construction incidents and accidents.
Soufiane El Moussaoui +4 more
doaj +1 more source
Asteroseismology of the Hyades red giant and planet host epsilon Tauri [PDF]
, 2019 Asteroseismic analysis of solar-like stars allows us to determine physical parameters such as stellar mass, with a higher precision compared to most other methods.
Aguirre, Victor Silva +25 more
core +2 more sources
Absolute dimensions of eclipsing binaries. XXIV, The Be star system DW Carinae, a member of the open cluster Collinder 228 [PDF]
, 2006 Context. The study of detached eclipsing binaries which are members of stellar clusters is is a powerful way of determining the properties of the cluster and of constraining the physical ingredients of theoretical stellar evolutionary models.
Clausen, J. V., Southworth, J. (John)
core +1 more source
Modelling long-range wavelength distortions in quasar absorption echelle spectra [PDF]
, 2017 Spectra observed with the Ultraviolet and Visual Echelle Spectrograph (UVES) on the European Southern Observatory's VLT exhibit long-range wavelength distortions.
V. Dumont, J. Webb
semanticscholar +1 more source