论文标题
ICECUBE高能中微子警报的ASAS-SN随访
ASAS-SN follow-up of IceCube high-energy neutrino alerts
论文作者
论文摘要
我们报告了2016年4月至2021年8月在Supernovae（ASAS-SN）的全套自动化调查的IceCube Neutrino警报中寻找光学对应物。尽管在2013年发现了弥漫性的天体高能中微子通量，但这些中微子的来源仍然在很大程度上未知。自2016年以来，IceCube已将可能的疾病中微子作为公共实时警报发表。通过正常的调查和触发了大型运动的观测值的结合，ASAS-SN在中微子检测后的1小时内获得了图像，在所有可观察到的ICECUBE警报中，有20％（11），一天之内，仅在57％的情况下（32）。对于所有可观察到的警报，我们在中微子警报中至少两周内获得了图像。 ASAS-SN提供了大约17％IceCube中微子警报的唯一光学随访。我们将两个先前声称的对应物恢复到中微子警报，Flaring-Blazar TXS 0506+056和潮汐破坏事件AT2019DSG。我们研究了先前发现的瞬态的光曲线，但没有确定任何进一步的候选中微子来源。我们还分析了Fermi 4FGL源的光学光曲线与高能中微子警报一致，但没有确定任何同时的耀斑活性。最后，我们在一系列假定的进化模型中得出了对中微子源的光度函数的约束。
We report on the search for optical counterparts to IceCube neutrino alerts released between April 2016 and August 2021 with the All-Sky Automated Survey for SuperNovae (ASAS-SN). Despite the discovery of a diffuse astrophysical high-energy neutrino flux in 2013, the source of those neutrinos remains largely unknown. Since 2016, IceCube has published likely-astrophysical neutrinos as public realtime alerts. Through a combination of normal survey and triggered target-of-opportunity observations, ASAS-SN obtained images within 1 hour of the neutrino detection for 20% (11) of all observable IceCube alerts and within one day for another 57% (32). For all observable alerts, we obtained images within at least two weeks from the neutrino alert. ASAS-SN provides the only optical follow-up for about 17% of IceCube's neutrino alerts. We recover the two previously claimed counterparts to neutrino alerts, the flaring-blazar TXS 0506+056 and the tidal disruption event AT2019dsg. We investigate the light curves of previously-detected transients in the alert footprints, but do not identify any further candidate neutrino sources. We also analysed the optical light curves of Fermi 4FGL sources coincident with high-energy neutrino alerts, but do not identify any contemporaneous flaring activity. Finally, we derive constraints on the luminosity functions of neutrino sources for a range of assumed evolution models.
