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Proceedings Paper

The visible and near infrared (VNIR) spectrometer of EChO
Author(s): Alberto Adriani; Ernesto Oliva; Giuseppe Piccioni; Emanuele Pace; Mauro Focardi; Canio Di Turi; Gianrico Filacchione; Maurizio Pancrazzi; Andrea Tozzi; Debora Ferruzzi; Ciro Del Vecchio; Fabrizio Capaccioni; Giusi Micela
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Paper Abstract

The Visible and Near Infrared (VNIR) spectrometer of the EChO will cover the spectral range between 0.55 and 2.50 μm. It has to be designed to assure a high efficiency over whole spectral range. It has to be able to observe stars with an apparent magnitude Mv= 9÷12 and able to see contrasts of the order of 10-4÷10-5 in order to measure characteristics of the exoplanets under investigation. VNIR would be a spectrometer in a cross-dispersed configuration by using a combination of a diffraction grating and a prism to spread the light in different wavelengths and in a useful number of orders of diffraction. It will use a Mercury Cadmium Telluride detector to satisfy the requirements of low thermal noise and the EChO system to operate at the working temperature of 40-45K. The instrument will be interfaced to the telescope optics by optical fibers to assure an easier coupling and an easier colocation of the instrument inside the EChO optical bench. The preliminary design of the instrument foresees a resolving power of about 330 with an entrance aperture of 2 arcsec.

Paper Details

Date Published: 21 September 2012
PDF: 8 pages
Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84422W (21 September 2012); doi: 10.1117/12.926103
Show Author Affiliations
Alberto Adriani, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
Ernesto Oliva, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Giuseppe Piccioni, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
Emanuele Pace, Univ. degli Studi di Firenze (Italy)
Mauro Focardi, Univ. degli Studi di Firenze (Italy)
Canio Di Turi, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
Univ. degli Studi di Roma La Sapienza (Italy)
Gianrico Filacchione, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
Maurizio Pancrazzi, Univ. degli Studi di Firenze (Italy)
Andrea Tozzi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Debora Ferruzzi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Ciro Del Vecchio, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Fabrizio Capaccioni, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
Giusi Micela, INAF - Osservatorio Astronomico di Palermo (Italy)


Published in SPIE Proceedings Vol. 8442:
Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave
Mark C. Clampin; Giovanni G. Fazio; Howard A. MacEwen; Jacobus M. Oschmann Jr., Editor(s)

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