Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-06-10
Astronomy and Astrophysics
Astrophysics
15 pages, 15 figures, Accepted for publication in PASJ, version with high resolution figures is available via http://www.nro
Scientific paper
We have upgraded the 60-cm radio survey telescope located in Nobeyama, Japan. We developed a new waveguide-type sideband-separating SIS mixer for the telescope, which enables the simultaneous detection of distinct molecular emission lines both in the upper and lower sidebands. Over the RF frequency range of 205-240 GHz, the single-sideband receiver noise temperatures of the new mixer are 40-100 K for the 4.0-8.0 GHz IF frequency band. The image rejection ratios are greater than 10 dB over the same range. For the dual IF signals obtained by the receiver, we have developed two sets of acousto-optical spectrometers and a telescope control system. Using the new telescope system, we successfully detected the 12CO (J=2-1) and 13CO (J=2-1) emission lines simultaneously toward Orion KL in 2005 March. Using the waveguide-type sideband-separating SIS mixer for the 200 GHz band, we have initiated the first simultaneous 12CO (J=2-1) and 13CO (J=2-1) survey of the galactic plane as well as large-scale mapping observations of nearby molecular clouds.
Asayama Shin'ichiro
Dobashi Kazuhito
Handa Toshihiro
Kaiden Masahiro
Kimura Kimihiro
No associations
LandOfFree
New 60-cm Radio Survey Telescope with the Sideband-Separating SIS Receiver for the 200 GHz Band does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with New 60-cm Radio Survey Telescope with the Sideband-Separating SIS Receiver for the 200 GHz Band, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New 60-cm Radio Survey Telescope with the Sideband-Separating SIS Receiver for the 200 GHz Band will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-677764