| Item type |
itemtype_ver1(1) |
| 公開日 |
2022-02-14 |
| タイトル |
|
|
タイトル |
A Data-scientific Noise-removal Method for Efficient Submillimeter Spectroscopy With Single-dish Telescopes |
|
言語 |
en |
| 著者 |
Taniguchi Akio
Tamura Yoichi
Ikeda Shiro
Takekoshi Tatsuya
Kawabe Ryohei
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利 |
|
|
言語 |
en |
|
権利情報 |
© 2021. The American Astronomical Society |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Atmospheric effects |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Spectroscopy |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Astronomical methods |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Astronomy data reduction |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Millimeter astronomy |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Submillimeter astronomy |
| 内容記述 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
For submillimeter spectroscopy with ground-based single-dish telescopes, removing the noise contribution from the Earth's atmosphere and the instrument is essential. For this purpose, here we propose a new method based on a data-scientific approach. The key technique is statistical matrix decomposition that automatically separates the signals of astronomical emission lines from the drift noise components in the fast-sampled (1–10 Hz) time-series spectra obtained by a position-switching (PSW) observation. Because the proposed method does not apply subtraction between two sets of noisy data (i.e., on-source and off-source spectra), it improves the observation sensitivity by a factor of √2. It also reduces artificial signals such as baseline ripples on a spectrum, which may also help to improve the effective sensitivity. We demonstrate this improvement by using the spectroscopic data of emission lines toward a high-redshift galaxy observed with a 2 mm receiver on the 50 m Large Millimeter Telescope. Since the proposed method is carried out offline and no additional measurements are required, it offers an instant improvement on the spectra reduced so far with the conventional method. It also enables efficient deep spectroscopy driven by the future 50 m class large submillimeter single-dish telescopes, where fast PSW observations by mechanical antenna or mirror drive are difficult to achieve. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
IOP publishing |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプresource |
http://purl.org/coar/resource_type/c_6501 |
|
タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
|
|
関連タイプ |
isVersionOf |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.3847/1538-3881/ac11f7 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
PISSN |
|
収録物識別子 |
0004-6256 |
| 書誌情報 |
en : The Astronomical Journal
巻 162,
号 3,
p. 111,
発行日 2021-09-01
|
| ファイル公開日 |
|
|
日付 |
2022-02-14 |
|
日付タイプ |
Available |
Taniguchi_2021_AJ_162_111.pdf (1.3 MB)
