Constraining bright optical counterparts of fast radio bursts
Constraining bright optical counterparts of fast radio bursts
复制标题
限制快速射电爆发的明亮光学对应物
DOI：
10.1051/0004-6361/202141110
复制
发表时间：
2021
影响因子：
6.5
通讯作者：
Deller, A. T.
中科院分区：
文献类型：
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作者：
Núñez, C.;Tejos, N.;Pignata, G.;Kilpatrick, C. D.;Prochaska, J. X.;Heintz, K. E.;Bannister, K. W.;Bhandari, S.;Day, C. K.;Deller, A. T.
背景快速射电暴（FRB）是持续时间为毫秒且起源未知的极高能脉冲。为了理解发射这些脉冲的现象，针对性和非针对性的搜索已被执行的多波长对应物，包括optical.AimsThe这项工作的目的是搜索光学瞬态的位置后，在不同的时间尺度（通常在一天，几个月，和一年后FRB检测到突发的到来8个良好的本地化（< 1″）FRB。然后，我们比较这与已知的光学光变曲线，以限制祖models.MethodsWe使用的拉斯坎布雷斯天文台全球望远镜（LCOGT）网络，及时采取的图像与其网络的23个望远镜在世界各地工作。我们使用模板减法技术来分析在不同时期收集的所有图像。我们将差异图像分为两组：在一组中，我们使用最后一个时期的图像作为模板，而在另一组中，我们使用第一个时期的图像作为模板。然后，我们搜索的FRB在模板减去images.ResultsWe的本地化的光学瞬态没有发现光学瞬态，因此设置限制幅度的光学同行。我们的LCOGT数据的视星等和绝对星等的典型极限分别是22等和−19等。我们比较了我们的极限星等与超亮超新星（SLSNe），Ia型超新星（SNe Ia），与伽马射线爆发有关的超新星（GRB-SNe），千新星，和潮汐破裂事件（TDEs. Conclusions假设FRB发射与这些瞬变的爆发时间一致，我们排除了与SLSNe（在99.9%置信水平）和SNe Ia、GRB-SNe和TDE（在相似置信水平）的最亮亚型的关联。然而，我们不能排除FRB直接与这些亚型中最微弱的亚型或与kilonovae相关的情况。
ContextFast radio bursts (FRBs) are extremely energetic pulses of millisecond duration and unknown origin. To understand the phenomenon that emits these pulses, targeted and un-targeted searches have been performed for multiwavelength counterparts, including the optical.AimsThe objective of this work is to search for optical transients at the positions of eight well-localized (< 1″) FRBs after the arrival of the burst on different timescales (typically at one day, several months, and one year after FRB detection). We then compare this with known optical light curves to constrain progenitor models.MethodsWe used the Las Cumbres Observatory Global Telescope (LCOGT) network to promptly take images with its network of 23 telescopes working around the world. We used a template subtraction technique to analyze all the images collected at differing epochs. We have divided the difference images into two groups: In one group we use the image of the last epoch as a template, and in the other group we use the image of the first epoch as a template. We then searched for optical transients at the localizations of the FRBs in the template subtracted images.ResultsWe have found no optical transients and have therefore set limiting magnitudes to the optical counterparts. Typical limits in apparent and absolute magnitudes for our LCOGT data are ∼22 and −19 mag in therband, respectively. We have compared our limiting magnitudes with light curves of super-luminous supernovae (SLSNe), Type Ia supernovae (SNe Ia), supernovae associated with gamma-ray bursts (GRB-SNe), a kilonova, and tidal disruption events (TDEs).ConclusionsAssuming that the FRB emission coincides with the time of explosion of these transients, we rule out associations with SLSNe (at the ∼99.9% confidence level) and the brightest subtypes of SNe Ia, GRB-SNe, and TDEs (at a similar confidence level). However, we cannot exclude scenarios where FRBs are directly associated with the faintest of these subtypes or with kilonovae.