Mizuho Uchiyama

MiniTAO/MAX38 first light: 30-micron band observations from the ground-based telescope

We successfully carried out 30-micron observations from the ground-based telescope for the first time with our newly developed mid-infrared instrument, MAX38, which is mounted on the University of Tokyo Atacama 1.0-m telescope (miniTAO telescope). Thanks to the high altitude of the miniTAO (5,640m) and dry weather condition of the Atacama site, we can access the 30-micron wavelength region from ground-based telescopes. To achieve the observation at 30- micron wavelength, remarkable devices are employed in MAX38. First, a Si:Sb 128x128 array detector is installed which can detect long mid-infrared light up to 38-micron. Second, we developed metal mesh filters for 30-micron region band-pass filter, which are composed of several gold thin-films with cross-shaped holes. Third, a cold chopper, a 6-cm square plane mirror controlled by a piezoelectric actuator, is built into the MAX38 optics for canceling out the atmospheric turbulence noise. It enables square-wave chopping with a 50-arcsecound throw at a frequency more than 5- Hz. Finally, a low-dispersion grism spectrometer (R~50) will provide information on the transmission spectrum of the terrestrial atmosphere in 20 to 40 micron. In this observation, we clearly demonstrated that the atmospheric windows around 30-micron can be used for the astronomical observations at the miniTAO site.

GROUND-BASED Paα NARROW-BAND IMAGING OF LOCAL LUMINOUS INFRARED GALAXIES. I. STAR FORMATION RATES AND SURFACE DENSITIES

Luminous infrared galaxies (LIRGs) are enshrouded by a large amount of dust, produced by their active star formation, and it is difficult to measure their activity in the optical wavelength. We have carried out Pa

Development of high-throughput silicon lens and grism with moth-eye antireflection structure for mid-infrared astronomy

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Development of a new calibration method for ground-based Paschen-alpha imaging data

narrow-band imaging observations of 38 nearby star-forming galaxies including 33 LIRGs listed in

miniTAO/ANIR Paα SURVEY OF LOCAL LIRGs

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Perfomance verification of the ground-based mid-infrared camera MAX38 on the MiniTAO Telescope

RBGS catalog with the Atacama Near InfraRed camera (ANIR) on the University of Tokyo Atacama Observatory (TAO) 1.0 m telescope (miniTAO). Star formation rates (SFRs) estimated from the Pa

Evaluations of new atmospheric windows at thirty micron wavelengths for astronomy

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Fabrication and tolerances of moth-eye structures for perfect antireflection in the mid-infrared wavelength region

fluxes, corrected for dust extinction using the Balmer Decrement Method (typically

Revised specifications and current development status of MIMIZUKU: the mid-infrared instrument for the TAO 6.5-mtelescope

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