赤外線高分散ラボ:Laboratory of Infrared High-resolution spectroscopy

about WINERED

Top Overview For observers Gallery Technical detail

Specifications

Observing modes

Mode

WIDE

HIRES-Y

HIRES-J

Wavelength coverage

0.91 - 1.35 μm
(z, Y, J bands)

0.96 - 1.11 μm
(Y band)

1.14 - 1.35 μm
(J band)

Spectral resolution
(R≡λ/ΔλFWHM)

28,000

70,000 [1]

Throughput

~ 50% [2]

~ 32% [2]

~ 42% [2]

Main disperser

Reflective echelle grating

Mosaicked high-blazed echelle grating

Array

1.7 μm cut-off HAWAII-2RG

Size

1.75 m (L) × 1.07 m (W) × 0.50 m (H)


[1] In the engineering observation on NTT, R∼55,000
[2] Including the throughput of optics and QE of the array.


Optical layout



Noise

The measured thermal background radiation reaching the array for various the ambient temperatures. The difference of plots shows different season. The solid line is a predicted flux with an assumption that the ambient environment is the block body. The dashed lines is the level of measured stray light in the cryostat.


Wavelength coverages

Wavelength coverages of all the WINERED modes superimposed on an atmospheric transmission curve.


Optical performances

WINERED

A measurement result of the total throughput of WINERED WIDE-mode (filled circles) that does not include the slit loss. The solid line, dashed line, and dotted line are the model of atmospheric transmittance, the measured throughput of the 1.3-m Araki telescope, and the quantum efficiency of the array based on measurements by Teledein Inc., respectively.