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

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

doi:10.1117/12.2303803

6 July 2018 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

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

Author Affiliations +

Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 1070223 (2018) https://doi.org/10.1117/12.2303803
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

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.

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U. Brauneck, J. Gallego, N. Cardiel, C. Cabello, R. Guzmán, J. M. Rodríguez-Espinosa, A. Herrero, M. Mas-Hesse, E. Salvador, A. Manrique, and A. Marín-Franch "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", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 1070223 (6 July 2018); https://doi.org/10.1117/12.2303803

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KEYWORDS

Optical filters

Coating

Image filtering

Bandpass filters

Galactic astronomy

Digital filtering

Wavefronts

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