High contrast imaging feasibility study for FRIDA

Mamadou N'Diaye; Salvador Cuevas; Kjetil Dohlen

doi:10.1117/12.787590

9 July 2008 High contrast imaging feasibility study for FRIDA

Mamadou N'Diaye, Salvador Cuevas, Kjetil Dohlen

Proceedings Volume 7014, Ground-based and Airborne Instrumentation for Astronomy II; 701466 (2008) https://doi.org/10.1117/12.787590
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

FRIDA will be an Infrared Imager and an Integral Field Spectrograph (IFS) for the 10.4m Gran Telescopio Canarias (GTC). This instrument is scheduled to be installed in 2010, at the Nasmyth A platform of the GTC, behind GTCAO (the Adaptive Optics [AO] system of the GTC). FRIDA design incorporates straightforward upgrade paths for focal plane masks. In this work, we analyze the capability of FRIDA to provide high dynamic range images. Different coronagraphic configurations could be inserted within FRIDA optical assembly. We quantify numerically their performance in presence of AO compensated wavefronts. Thereafter, numerical simulations about the Simultaneous Spectral Differential Imaging¹ (SSDI) method are presented. This technique aims to suppress the AO residual speckles and can be applied to selected frames of the data cube, provided by FRIDA in IFS mode. Therefore, we estimate the starlight attenuation that could be reached with the association "Coronagraph + SSDI method" for the ground-based instrument "GTC + GTCAO + FRIDA".

Citation Download Citation

Mamadou N'Diaye, Salvador Cuevas, and Kjetil Dohlen "High contrast imaging feasibility study for FRIDA", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 701466 (9 July 2008); https://doi.org/10.1117/12.787590

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