Yuji Ikeda (Photocoding)
, Naoto Kobayashi, Sohei Kondo, Chikako Yasui,
Kentaro Motohara, and Atsushi Minami (Univ. Tokyo)
"Grandbased and Airbone Instrumentation for Astronomy" @Orland
We are developing a new near-infrared high-resolution (Rmax = 100,000) and
high-sensitive spectrograph WINERED, which is specifically customized for
short NIR bands at 0.9〜1.35μm. WINERED employs the following two novel approaches
in the optical system: (1) portable design with a ZnSe immersion grating and (2) warm
optics without any cold stops. These concepts result in several essential advantages
as follows: easy to build, align, and maintain; these result in a short development time
and low cost. WINERED employs a VIRGO HgCdTe 2k × 2k array by Raytheon as the detector.
We are developing our own array control system that aims at a low readout noise (< 10 e) with
a readout time of about 3 sec. Our goal is to achieve a high sensitivity of R = 100,000
for a NIR spectroscopy of 15 mag and 17 mag point sources with 4 m and 10 m telescopes,
respectively. We have just finalized the optical design and produced a proto-type electronics,
which are described in the companion papers by Yasui et al. and Kondo et al., respectively.
We plan to complete this instrument by the end of 2008 and hope to attach it to
various 4 to 10 m telescopes as a PI-type instrument.