Results 41 to 50 of about 138,479 (95)

Si(Li) X-ray astronomical spectroscopy [PDF]

open access: yes
The general considerations involved in the choice of Si(Li) as a non-dispersive spectrometer for X-ray astronomy are discussed. In particular, its adaptation to HEAO-B is described as an example of the space-borne application of Si(Li ...
Holt, S. S.
core   +1 more source

FT-IR microanalysis of mineral separates from primitive meteorites: techniques, problems and solutions [PDF]

open access: yes, 2004
From the Introduction: We compared several methods of infrared micro spectroscopy using an FT-IR microscope and workbench. This is part of a project to assemble a database of infrared and optical spectra from mineral separates from meteorites, for ...
Grady, M. M., Jones, G. C., Morlok, A.
core  

NAIR: Novel Astronomical Instrumentation through photonic Reformatting [PDF]

open access: yesarXiv, 2018
The project "Novel Astronomical Instrumentation through photonic Reformatting" is a DFG-funded collaboration to exploit the recognized potential of photonics solutions for a radically new approach to astronomical instrumentation for optical/infrared high precision spectroscopy and high angular resolution imaging.
arxiv  

Determining Redshift via Astronomical Spectroscopy [PDF]

open access: yes, 2018
The Doppler effect is a well-known physical phenomenon which results in a change of a wave’s frequency or wavelength due to the motion of its source. Celestial objects in space (stars, galaxies, etc.) also experience a Doppler effect on their emitted ...
Glatt, Joshua
core   +1 more source

Far-red spectroscopy of peculiar stars and the GAIA mission [PDF]

open access: yesarXiv, 2002
The coming GAIA Cornerstone mission by ESA will provide micro-arcsec astrometry, 10 bands photometry and far-red spectroscopy for a huge number of stars in the Galaxy (10^9). GAIA spectroscopy will cover the range 8480--8740 Ang, which includes the CaII triplet and the head of the Paschen series.
arxiv  

Ultraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic waveguides

open access: yes, 2023
Astronomical precision spectroscopy underpins searches for life beyond Earth, direct observation of the expanding Universe and constraining the potential variability of physical constants across cosmological scales.
Ayhan, Furkan   +20 more
core  

Robotic Telescopes and Networks: New Tools for Education and Science

open access: yes, 1999
Nowadays many telescopes around the world are automated and some networks of robotic telescopes are active or planned as shown by the lists we draw up.
Querci, F. R., Querci, M.
core   +2 more sources

Infrared spectroscopy of extraterrestrial material: comparison with astronomical spectra of dust [PDF]

open access: yes, 2005
Infrared spectra of components (CAI, matrix etc.) from type 3 carbonacous chondrites (Allende, Ornans, Vigarano) are compared with infrared spectra from astronomical objects (comets, zodiacal light, circumstellar disks and others)
Grady, M. M., Koehler, M., Morlok, A.
core  

SILVERRUSH. III. Deep Optical and Near-Infrared Spectroscopy for Lya and UV-Nebular Lines of Bright Lya Emitters at z=6-7

open access: yes, 2017
We present Lya and UV-nebular emission line properties of bright Lya emitters (LAEs) at z=6-7 with a luminosity of log L_Lya/[erg s-1] = 43-44 identified in the 21-deg2 area of the SILVERRUSH early sample developed with the Subaru Hyper Suprime-Cam (HSC)
Furusawa, Hisanori   +25 more
core   +1 more source

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