091240

After a 10-year hiatus Mrk 590 has partially re-ignited with repeated major X-ray and UV flare-ups captured by Swift monitoring. We wish to seize this rare opportunity to document the onset of AGN activity as it occurs since this can lead to significant insight on the long-standing issue of how AGNs are triggered and fueled. We will use approved Swift XRT monitoring to trigger up to 4 single-visit NuSTAR observations of which up to 3 are joint with XMM (or NICER). Together these data are needed to determine if a standard thin accretion disk is being built up as the AGN turns on (and then characterize this event) or if alternate physics are at play. 1 [truncated! Please see actual data for full text]

经过10年的沉寂，马克林590（Mrk 590）已部分重新激活，斯威夫特（Swift）望远镜的监测捕捉到了其反复出现的强烈X射线与紫外耀斑。我们希望把握这一罕见契机，完整记录活动星系核（Active Galactic Nucleus, AGN）活动启动的全过程——此类观测将为长期悬而未决的AGN触发与供能机制问题提供关键科学洞见。我们将利用已获批的斯威夫特X射线望远镜（Swift X-ray Telescope, XRT）监测计划，申请最多4次单次观测时段的核光谱望远镜阵列（Nuclear Spectroscopic Telescope Array, NuSTAR）观测数据，其中最多3次将与XMM-牛顿（XMM-Newton）或中子星内部组成探测器（Neutron Star Interior Composition Explorer, NICER）联合开展。整合上述观测数据，我们将得以判断：当AGN启动时，是否正在形成标准薄吸积盘（并据此对该事件进行特性表征），抑或是存在其他未知物理机制在发挥作用。1 [内容已截断！完整文本请查阅原始数据集]