Large format imaging spectrograph for the Large Submillimeter Telescope (LST). (arXiv:2102.08280v1 [astro-ph.IM])

Large format imaging spectrograph for the Large Submillimeter Telescope (LST). (arXiv:2102.08280v1 [astro-ph.IM])
<a href="http://arxiv.org/find/astro-ph/1/au:+Kohno_K/0/1/0/all/0/1">K. Kohno</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kawabe_R/0/1/0/all/0/1">R. Kawabe</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tamura_Y/0/1/0/all/0/1">Y. Tamura</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Endo_A/0/1/0/all/0/1">A. Endo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Baselmans_J/0/1/0/all/0/1">J. J. A. Baselmans</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Karatsu_K/0/1/0/all/0/1">K. Karatsu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Inoue_A/0/1/0/all/0/1">A. K. Inoue</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Moriwaki_K/0/1/0/all/0/1">K. Moriwaki</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hayatsu_N/0/1/0/all/0/1">N. H. Hayatsu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yoshida_N/0/1/0/all/0/1">N. Yoshida</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yoshimura_Y/0/1/0/all/0/1">Y. Yoshimura</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hatsukade_B/0/1/0/all/0/1">B. Hatsukade</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Umehata_H/0/1/0/all/0/1">H. Umehata</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Oshima_T/0/1/0/all/0/1">T. Oshima</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Takekoshi_T/0/1/0/all/0/1">T. Takekoshi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Taniguchi_A/0/1/0/all/0/1">A. Taniguchi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Klaassen_P/0/1/0/all/0/1">P. D. Klaassen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mroczkowski_T/0/1/0/all/0/1">T. Mroczkowski</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cicone_C/0/1/0/all/0/1">C. Cicone</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bertoldi_F/0/1/0/all/0/1">F. Bertoldi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dannerbauer_H/0/1/0/all/0/1">H. Dannerbauer</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tosaki_T/0/1/0/all/0/1">T. Tosaki</a>

We present a conceptual study of a large format imaging spectrograph for the
Large Submillimeter Telescope (LST) and the Atacama Large Aperture
Submillimeter Telescope (AtLAST). Recent observations of high-redshift galaxies
indicate the onset of earliest star formation just a few 100 million years
after the Big Bang (i.e., z = 12–15), and LST/AtLAST will provide a unique
pathway to uncover spectroscopically-identified first forming galaxies in the
pre-reionization era, once it will be equipped with a large format imaging
spectrograph. We propose a 3-band (200, 255, and 350 GHz), medium resolution (R
= 2,000) imaging spectrograph with 1.5 M detectors in total based on the KATANA
concept (Karatsu et al. 2019), which exploits technologies of the integrated
superconducting spectrometer (ISS) and a large-format imaging array. A 1-deg2
drilling survey (3,500 hr) will capture a large number of [O III] 88 um (and [C
II] 158 um) emitters at z = 8–9, and constrain [O III] luminosity functions at
z > 12.

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