WEKO3
アイテム
First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
https://hiroshima.repo.nii.ac.jp/records/2008904
https://hiroshima.repo.nii.ac.jp/records/2008904186947a6-5c9f-4316-9b21-10cc9218435d
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ApJL_875_L3.pdf (14.5 MB)
|
| Item type | デフォルトアイテムタイプ_（フル）(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-18 | |||||||||
| タイトル | ||||||||||
| タイトル | First M87 Event Horizon Telescope Results. III. Data Processing and Calibration | |||||||||
| 言語 | en | |||||||||
| 作成者 |
The Event Horizon Telescope Collaboration
× The Event Horizon Telescope Collaboration
× Sasada, Mahito
|
|||||||||
| 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 | |||||||||
| 権利情報 | ||||||||||
| 権利情報 | © 2019. The American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | black hole physics | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | galaxies: individual (M87, 3C279) | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | galaxies: jets | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | techniques: high angular resolution | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | techniques: interferometric | |||||||||
| 内容記述 | ||||||||||
| 内容記述 | We present the calibration and reduction of Event Horizon Telescope (EHT) 1.3 mm radio wavelength observations of the supermassive black hole candidate at the center of the radio galaxy M87 and the quasar 3C 279, taken during the 2017 April 5–11 observing campaign. These global very long baseline interferometric observations include for the first time the highly sensitive Atacama Large Millimeter/submillimeter Array (ALMA); reaching an angular resolution of 25 μas, with characteristic sensitivity limits of ∼1 mJy on baselines to ALMA and ∼10 mJy on other baselines. The observations present challenges for existing data processing tools, arising from the rapid atmospheric phase fluctuations, wide recording bandwidth, and highly heterogeneous array. In response, we developed three independent pipelines for phase calibration and fringe detection, each tailored to the specific needs of the EHT. The final data products include calibrated total intensity amplitude and phase information. They are validated through a series of quality assurance tests that show consistency across pipelines and set limits on baseline systematic errors of 2% in amplitude and 1° in phase. The M87 data reveal the presence of two nulls in correlated flux density at ∼3.4 and ∼8.3 Gλ and temporal evolution in closure quantities, indicating intrinsic variability of compact structure on a timescale of days, or several light-crossing times for a few billion solar-mass black hole. These measurements provide the first opportunity to image horizon-scale structure in M87. | |||||||||
| 言語 | en | |||||||||
| 出版者 | ||||||||||
| 出版者 | The American Astronomical Society | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | 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 | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | 10.3847/2041-8213/ab0c57 | |||||||||
| 関連情報 | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | https://doi.org/10.3847/2041-8213/ab0c57 | |||||||||
| 収録物識別子 | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 2041-8205 | |||||||||
| 収録物識別子 | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 2041-8213 | |||||||||
| 開始ページ | ||||||||||
| 開始ページ | L3 | |||||||||
| 書誌情報 |
The Astrophysical Journal Letters The Astrophysical Journal Letters 巻 875, 号 1, p. L3, 発行日 2019-04-10 |
|||||||||
| 旧ID | 48226 | |||||||||
