探测和报告快速射电暴
Verifying and Reporting Fast Radio Bursts
摘要：
快速射电暴（Fast Radio Burst，FRB）是一类具有天体物理起源的射电短时间瞬变现象。原型FRB是在接收器频率范围的范围上出现的宽带信号，其在时间上是窄的，并且是高度分散的，遵循$ν^{-2}$关系。然而，一些FRB出现带限，并显示明显的闪烁，复杂的频率相关的结构，或多分量脉冲形状。虽然有足够的证据表明FRB确实是天体物理学的，但它们的一次性性质需要在报告检测时进行额外的审查，而不是假阳性。目前，FRB没有正式的验证框架，而是一套社区实践。在这篇文章中，我们讨论了假阳性的潜在来源，并提出了一个框架，在该框架中，FRB类事件可以被评估为真实或其他。我们提出了来自阿雷西博，LOFAR和南山望远镜的数据中的假阳性事件的例子，这些事件虽然与FRB相似，但被发现是由于仪器变化，噪声和射频干扰。区分这些假阳性检测从天体物理事件需要的知识和测试超出阈值单脉冲检测。我们讨论了检测后分析，验证测试，以及报告FRB检测时应提供的数据集。
英文摘要：
Fast Radio Bursts (FRBs) are a class of short-duration transients at radio wavelengths with inferred astrophysical origin. The prototypical FRB is a broadband signal that occurs over the extent of the receiver frequency range, is narrow in time, and is highly dispersed, following a $ν^{-2}$ relation. However, some FRBs appear band-limited, and show apparent scintillation, complex frequency-dependent structure, or multi-component pulse shapes. While there is sufficient evidence that FRBs are indeed astrophysical, their one-off nature necessitates extra scrutiny when reporting a detection as bona fide and not a false positive. Currently, there is no formal validation framework for FRBs, rather a set of community practices. In this article, we discuss potential sources of false positives, and suggest a framework in which FRB-like events can be evaluated as real or otherwise. We present examples of false-positive events in data from the Arecibo, LOFAR, and Nanshan telescopes, which while FRB-like, are found to be due to instrumental variations, noise, and radio-frequency interference. Differentiating these false-positive detections from astrophysical events requires knowledge and tests beyond thresholded single-pulse detection. We discuss post-detection analyses, verification tests, and datasets which should be provided when reporting an FRB detection.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
