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| Paper: |
A New “Off-point-less” Method for Mm/submm Spectroscopy with a Frequency-Modulating Local Oscillator |
| Volume: |
476, New Trends in Radio Astronomy in the ALMA Era |
| Page: |
401 |
| Authors: |
Tamura, Y.; Tatamitani, Y.; Takahashi, S.; Horigome, O.; Maekawa, J.; Kohno, K.; Sakai, T.; Taniguchi, A. |
| Abstract: |
We have been developing a new method for (sub)mm spectroscopy with a frequency-modulating local oscillator (FMLO), which improves observing efficiencies and thus sensitivity of single-dish spectroscopic observations, compared to the conventional position- and frequency-switching methods. The noise removal technique which the FMLO method employes is similar to that used in continuum deep surveys and CMB experiments using multi-pixel bolometer cameras. We have implemented a new FMLO control system on the ASTE 10-m telescope, which demonstrates that the FMLO method does work for (1) minimizing the overheads and maximizing the observing throughput by efficiently removing correlated noises and (2) separating sidebands. |
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