Parkes observations for project P1171 semester 2025APRS_02

The origin of Fast Radio Bursts (FRBs) is still unclear with a plethora of theoretical models for their origin.\n Several models predict associated multi-wavelength emission, but previous searches for optical, X-ray or\n gamma-ray counterparts of FRBs have not led to any detection. The Galactic magnetar SGR 1935+2154A has\n been observed to simultaneously emit FRB-like bursts and X-ray flares, which suggests that also extragalactic\n FRB sources may exhibit X-ray counterparts. Because of the high cost of X-ray satellites and in face of the\n relatively low FRB detection probability in their small field of view, coordinated radio and X-ray observations are\n logistically very difficult to set up. We propose a new approach using the X-ray satellite XMM-Newton and the\n Parkes/Murriyang radio telescope to put constraints on the theoretical models: We aim to conduct shadowing\n observations with the Parkes telescope to search for new FRBs in fields that are simultaneously covered by\n XMM-Newton. We hereby target regular XMM observations of nearby (low-z) galaxies, to increase our\n detection chances of possibly associated X-ray emission. In case of an FRB detection in the radio band, we will\n have guaranteed simultaneous X-ray coverage and will get detailed information about the associated X-ray\n spectrum and light curve since all XMM-Newton data will become public a year after the observation.

快速射电暴（Fast Radio Bursts, FRBs）的起源至今仍未明确，学界已提出大量相关理论模型。
部分模型预言其存在多波段伴随辐射，但此前针对FRBs的光学、X射线或伽马射线对应体的搜寻均未获得任何探测结果。
银河系磁星SGR 1935+2154A已被观测到同时发出类FRB爆发与X射线耀斑，这暗示河外FRB源或许也会产生X射线对应体。
由于X射线卫星造价高昂，且其视场较小导致FRB探测概率相对偏低，因此协调开展射电与X射线观测在组织实施上极具难度。
我们提出一种基于XMM-牛顿卫星（XMM-Newton）与帕克斯/穆里扬射电望远镜（Parkes/Murriyang）的新方法，以对相关理论模型施加约束：我们计划利用帕克斯望远镜开展掩蔽观测，在XMM-牛顿同时覆盖的天区中搜寻新的FRB。
本次研究的目标为邻近（低红移）星系的常规XMM观测天区，以提升探测到可能伴随X射线辐射的概率。
若在射电波段探测到FRB，我们将获得已确定的同步X射线覆盖数据；且由于所有XMM-牛顿卫星的观测数据均会在观测完成一年后公开，我们还将获取该伴随X射线的能谱与光变曲线的详细信息。