IFU for wide field optical spectrograph (WFOS) on TMT

Shinobu Ozaki; Yoko Tanaka; Toshihiro Tsuzuki; Bungo Ikenoue; Takashi Hattori; Tsuyoshi Ishigaki; Rin Sasaki; Charles Steidel; Reston Nash; Jason Fucik; Eric Peng; George Jacoby; Alastair Heptonstall

doi:10.1117/12.3017700

18 July 2024 IFU for wide field optical spectrograph (WFOS) on TMT

Shinobu Ozaki, Yoko Tanaka, Toshihiro Tsuzuki, Bungo Ikenoue, Takashi Hattori, Tsuyoshi Ishigaki, Rin Sasaki, Charles Steidel, Reston Nash, Jason Fucik, Eric Peng, George Jacoby, Alastair Heptonstall

Author Affiliations +

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130965T (2024) https://doi.org/10.1117/12.3017700
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

We present the conceptual design of the integral field unit (IFU) for Wide Field Optical Spectrograph (WFOS), one of the first-generation instruments on TMT. The IFU is a promising upgrade path of WFOS. The IFU has 4 image slicers with different slice widths of 1.5, 0.75, 0.5 and 0.25 arcsec. The slice length and the number of slices are 20 arcsec and 18 in all slicers. These slicers offer the field sizes of 27, 13.5, 9 and 4.5 × 20 arcsec2, respectively. This field variation covers sizes of galaxy, circum-galactic medium and inter-galactic medium. In the 0.25-arcsec width mode, the spectral resolution reaches R=13,635 without slit loss. Multilayer dielectric reflective coating with high reflectivity (> 98% at any wavelength) is made on all reflective surfaces, which offers high through put of the IFU (> 80%).

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Shinobu Ozaki, Yoko Tanaka, Toshihiro Tsuzuki, Bungo Ikenoue, Takashi Hattori, Tsuyoshi Ishigaki, Rin Sasaki, Charles Steidel, Reston Nash, Jason Fucik, Eric Peng, George Jacoby, and Alastair Heptonstall "IFU for wide field optical spectrograph (WFOS) on TMT", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130965T (18 July 2024); https://doi.org/10.1117/12.3017700

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