Initial results from a real-time FRB search with the GBT
文献类型：期刊论文
| 作者 | Agarwal, Devansh1,2; Lorimer, D. R.1,2; Surnis, M. P.1,2; Pei, X.3,4 ; Karastergiou, A.5,6,7; Golpayegani, G.1,2; Werthimer, D.8; Cobb, J.8; McLaughlin, M. A.1,2; White, S.9
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2020-09-01 |
| 卷号 | 497期号:1页码:352-360 |
| ISSN号 | 0035-8711 |
| 关键词 | surveys pulsars: general |
| DOI | 10.1093/mnras/staa1927 |
| 产权排序 | 3 |
| 英文摘要 | We present the data analysis pipeline, commissioning observations, and initial results from the GREENBURST fast radio burst (FRB) detection system on the Robert C. Byrd Green Bank Telescope (GBT) previously described by Surnis et al., which uses the 21-cm receiver observing commensally with other projects. The pipeline makes use of a state-of-the-art deep learning classifier to winnow down the very large number of false-positive single-pulse candidates that mostly result from radio frequency interference. In our observations, totalling 156.5 d so far, we have detected individual pulses from 20 known radio pulsars that provide an excellent verification of the system performance. We also demonstrate, through blind injection analyses, that our pipeline is complete down to a signal-to-noise threshold of 12. Depending on the observing mode, this translates into peak flux sensitivities in the range 0.14-0.89 Jy. Although no FRBs have been detected to date, we have used our results to update the analysis of Lawrence et al. to constrain the FRB all-sky rate to be 1150(-180)(+200) per day above a peak flux density of 1 Jy. We also constrain the source count index alpha = 0.84 +/- 0.06, which indicates that the source count distribution is substantially flatter than expected from a Euclidean distribution of standard candles (where alpha = 1.5). We discuss this result in the context of the FRB redshift and luminosity distributions. Finally, we make predictions for detection rates with GREENBURST, as well as other ongoing and planned FRB experiments. |
| URL标识 | 查看原文 |
| WOS关键词 | FAST RADIO-BURSTS |
| 资助项目 | NSF[AAG-1616042] ; NSF[OIA-1458952] ; NSF[PHY-1430284] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000574919600025 |
| 资助机构 | NSF |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/3685]  |
| 专题 | 射电天文研究室_数字技术实验室 |
| 通讯作者 | Agarwal, Devansh |
| 作者单位 | 1.West Virginia Univ, Dept Phys & Astron, POB 6315, Morgantown, WV 26506 USA 2.West Virginia Univ, Ctr Gravitat Waves & Cosmol, Chestnut Ridge Res Bldg, Morgantown, WV 26506 USA 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Univ Oxford, Subdept Astrophys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England 6.Univ Western Cape, Phys Dept, ZA-7535 Cape Town, South Africa 7.Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Grahamstown, South Africa 8.Univ Calif Berkeley, Dept Astron, 501 Campbell Hall 3411, Berkeley, CA 94720 USA 9.Green Bank Observ, POB 2, Green Bank, WV 24944 USA 10.Univ Oxford, Dept Engn Sci, OeRC, Keble Rd, Oxford OX1 3QG, England |
| 推荐引用方式 GB/T 7714 | Agarwal, Devansh,Lorimer, D. R.,Surnis, M. P.,et al. Initial results from a real-time FRB search with the GBT[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,497(1):352-360. |
| APA | Agarwal, Devansh.,Lorimer, D. R..,Surnis, M. P..,Pei, X..,Karastergiou, A..,...&Foster, G..(2020).Initial results from a real-time FRB search with the GBT.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,497(1),352-360. |
| MLA | Agarwal, Devansh,et al."Initial results from a real-time FRB search with the GBT".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 497.1(2020):352-360. |
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