First light of SOVAG, a spectrograph for visible and near-infrared observation of asteroids
Spectroscopy in the visible and near-infrared has been the main tool for characterising the surface properties of asteroids for decades. For a given target, the two wavelength regimes are usually acquired by different telescopes/instruments, separated by years. They are seldom obtained simultaneousl...
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| Veröffentlicht in: | Experimental astronomy 2021-02, Vol.51 (1), p.181-192 |
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| container_title | Experimental astronomy |
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| creator | Birlan, M. Colas, F. Cochard, F. Darson, D. Carry, B. Vernazza, P. Nedelcu, A. Dubois, J. Fornasier, S. Perna, D. Morfin, P. |
| description | Spectroscopy in the visible and near-infrared has been the main tool for characterising the surface properties of asteroids for decades. For a given target, the two wavelength regimes are usually acquired by different telescopes/instruments, separated by years. They are seldom obtained simultaneously. However, it is not straightforward to combine datasets from different sources because of the spectral reddening linked with phase angle. We present the first-light result of SOVAG (Spectrographe pour l’Observations dans le Visible et infrarouge proche d’Astéroïdes Géocroiseurs), a new concept of spectrograph for observing both wavelength ranges at the same time. It is compact in design and portable. We developed a prototype of this instrument between 2016 and 2018. In July 2018, we mounted SOVAG on the 1 m-telescope in Pic du Midi observatory (for which it was designed) and conducted its on-sky first light experiment. We present a spectrum of (4) Vesta which demonstrates the reliability of observations and the accuracy of the calibration. Ongoing development will allow us to push observation-limits toward fainter objects. |
| doi_str_mv | 10.1007/s10686-020-09678-5 |
| format | Article |
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| source | Springer Nature - Complete Springer Journals |
| subjects | Asteroids Astronomical instruments Astronomy Astrophysics Chemistry and Earth Sciences Computer Science Near infrared radiation Observations and Techniques Physics Physics and Astronomy Review Article Sciences of the Universe Statistics for Engineering Surface properties Telescopes |
| title | First light of SOVAG, a spectrograph for visible and near-infrared observation of asteroids |
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