Share Email Print
cover

Proceedings Paper

New achievements of ASTE: the Atacama Submillimeter Telescope Experiment
Author(s): Hajime Ezawa; Kotaro Kohno; Ryohei Kawabe; Satoshi Yamamoto; Hirofumi Inoue; Hiroyuki Iwashita; Hiroshi Matsuo; Takeshi Okuda; Tai Oshima; Takeshi Sakai; Kunihiko Tanaka; Nobuyuki Yamaguchi; Grant W. Wilson; Min S. Yun; Itziar Aretxaga; David Hughes; Jason Austermann; Thushara A. Perera; Kimberly S. Scott; Leonardo Bronfman; Juan R. Cortes
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

ASTE is a 10-m submillimeter telescope operating in Atacama desert in northern Chile since 2002 by NAOJ and collaborators. Thanks to the excellent observing condition at the telescope site, ASTE has been producing numerous astronomical results from star forming regions, Galactic center, Magellanic clouds, nearby galaxies, and galaxy clusters. There has been three major improvements during the years 2007-2008: continuum camera "AzTEC", new SIS receiver "CATS345", and a wide-band spectrometer "WHSF". AzTEC is a 144 element bolometer array at 270 GHz, developed by University of Massachusetts and collaborators. The mapping speed reaches 10-30 arcmin2/hr/mJy2. CATS345 is a side-band separation (2SB) SIS receiver developed by University of Tokyo and NAOJ. The IF bandwidth is 4 GHz with side-band rejection ratio better than 10 dB. We have achieved the typical system noise temperature of 200-400 K (SSB) within 330-360 GHz, the best value being 150 K (SSB) at the frequency of 12CO(J=3-2) at 345 GHz under a typical weather condition. The new spectrometer WHSF employs of an FX type auto-correlator, ultra-high speed sampler, and digital signal transmitter. It can be operated in two modes; 4096 MHz band-width × 2 IFs or 2048 MHz band-width × 4 IFs, both with 4096 channels in spectral resolution.

Paper Details

Date Published: 22 July 2008
PDF: 9 pages
Proc. SPIE 7012, Ground-based and Airborne Telescopes II, 701208 (22 July 2008); doi: 10.1117/12.789652
Show Author Affiliations
Hajime Ezawa, National Astronomical Observatory of Japan (Japan)
Nobeyama Radio Observatory (Japan)
Kotaro Kohno, Institute of Astronomy, The Univ. of Tokyo (Japan)
Ryohei Kawabe, Nobeyama Radio Observatory (Japan)
Satoshi Yamamoto, The Univ. of Tokyo (Japan)
Hirofumi Inoue, Institute of Astronomy, The Univ. of Tokyo (Japan)
Hiroyuki Iwashita, Nobeyama Radio Observatory (Japan)
Hiroshi Matsuo, National Astronomical Observatory of Japan (Japan)
Takeshi Okuda, National Astronomical Observatory of Japan (Japan)
Tai Oshima, Nobeyama Radio Observatory (Japan)
Takeshi Sakai, Nobeyama Radio Observatory (Japan)
Kunihiko Tanaka, Nobeyama Radio Observatory (Japan)
Nobuyuki Yamaguchi, National Astronomical Observatory of Japan (Japan)
Nobeyama Radio Observatory (Japan)
Grant W. Wilson, Univ. of Massachusetts, Amherst (United States)
Min S. Yun, Univ. of Massachusetts, Amherst (United States)
Itziar Aretxaga, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
David Hughes, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Jason Austermann, Univ. of Massachusetts, Amherst (United States)
Thushara A. Perera, Univ. of Massachusetts, Amherst (United States)
Kimberly S. Scott, Univ. of Massachusetts, Amherst (United States)
Leonardo Bronfman, Univ. de Chile (Chile)
Juan R. Cortes, Univ. de Chile (Chile)


Published in SPIE Proceedings Vol. 7012:
Ground-based and Airborne Telescopes II
Larry M. Stepp; Roberto Gilmozzi, Editor(s)

© SPIE. Terms of Use
Back to Top