Niu, Chen-Hui and Li, Di and Luo, Rui and Wang, Wei-Yang and Yao, Jumei and Zhang, Bing and Zhu, Wei-Wei and Wang, Pei and Ye, Haoyang and Zhang, Yong-Kun and Niu, Jia-rui and Tang, Ning-yu and Duan, Ran and Krco, Marko and Dai, Shi and Feng, Yi and Miao, Chenchen and Pan, Zhichen and Qian, Lei and Xue, Mengyao and Yuan, Mao and Yue, Youling and Zhang, Lei and Zhang, Xinxin (2021) CRAFTS for Fast Radio Bursts: Extending the Dispersion–Fluence Relation with New FRBs Detected by FAST. The Astrophysical Journal Letters, 909 (1). L8. ISSN 2041-8205
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Abstract
We report three new FRBs discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST), namely FRB 181017.J0036+11, FRB 181118, and FRB 181130, through the Commensal Radio Astronomy FAST Survey (CRAFTS). Together with FRB 181123, which was reported earlier, all four FAST-discovered FRBs share the same characteristics of low fluence (≤0.2 Jy ms) and high dispersion measure (DM, >1000 pc cm−3), consistent with the anticorrelation between DM and fluence of the entire FRB population. FRB 181118 and FRB 181130 exhibit band-limited features. FRB 181130 is prominently scattered (τs ≃ 8 ms) at 1.25 GHz. FRB 181017.J0036+11 has full-bandwidth emission with a fluence of 0.042 Jy ms, which is one of the faintest FRB sources detected so far. CRAFTS has started to build a new sample of FRBs that fills the region for more distant and fainter FRBs in the fluence–DME diagram, previously out of reach of other surveys. The implied all-sky event rate of FRBs is ${1.24}_{-0.90}^{+1.94}\times {10}^{5}$ sky−1 day−1 at the 95% confidence interval above 0.0146 Jy ms. We also demonstrate here that the probability density function of CRAFTS FRB detections is sensitive to the assumed intrinsic FRB luminosity function and cosmological evolution, which may be further constrained with more discoveries.
Item Type: | Article |
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Subjects: | OA Open Library > Physics and Astronomy |
Depositing User: | Unnamed user with email support@oaopenlibrary.com |
Date Deposited: | 15 May 2023 05:42 |
Last Modified: | 29 Jan 2024 05:49 |
URI: | http://archive.sdpublishers.com/id/eprint/785 |