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First results using a new near-infrared 1% narrow-band filter in the GTC 10.4m telescope to detect galaxies at the dawn of the universe
Author(s): U. Brauneck; J. Gallego; N. Cardiel; C. Cabello; R. Guzmán; J. M. Rodríguez-Espinosa; A. Herrero; M. Mas-Hesse; E. Salvador; A. Manrique; A. Marín-Franch
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Paper Abstract

We present the first results using a new SCHOTT 1% narrow band filter in the near infrared for the CIRCE camera of the 10.4m GTC telescope. The goal of the project is to detect very distant galaxies at the dawn of the Universe. These remote and extremely faint galaxies are selected by their Ly-alpha emission. For this project SCHOTT manufactured a high transmission 11 nm narrow band filter which has been used in the fully cryogenic near-infrared camera CIRCE of the Gran Telescopio Canarias Telescope. A steep interference filter Bandpass with FWHM 11nm centered at 1254nm was coated on a fused silica substrate. The filter achieved excellent maximum transmission and deep out of band blocking. This was achieved by using magnetron sputtering for the filter coating process. We report on the spectral and interferometric results of the filter and the scientific results achieved with a first set of observations.

Paper Details

Date Published: 6 July 2018
PDF: 8 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 1070223 (6 July 2018); doi: 10.1117/12.2303803
Show Author Affiliations
U. Brauneck, SCHOTT Suisse SA (Switzerland)
J. Gallego, Univ. Complutense de Madrid (Spain)
N. Cardiel, Univ. Complutense de Madrid (Spain)
C. Cabello, Univ. Complutense de Madrid (Argentina)
R. Guzmán, Univ. of Florida (United States)
J. M. Rodríguez-Espinosa, Instituto de Astrofísica de Canarias (Spain)
A. Herrero, Instituto de Astrofísica de Canarias (Spain)
M. Mas-Hesse, Ctr. de Astrobiología (Spain)
E. Salvador, Univ. of Barcelona (Spain)
A. Manrique, Univ. of Barcelona (Spain)
A. Marín-Franch, Ctr. de Estudios de Física del Cosmos de Aragón (Spain)

Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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