时间：2019年1月22日（周二）上午9:30-11:30

　　地点：多学科楼312

　　报告人：Sarah Antier (APC/Paris 7 university)

　　主持人：熊少林 研究员

　　题目：Gravitational waves astrophysics and gamma-ray bursts

　　摘要：

　　The second LIGO-Virgo observing run (O2) saw the birth of multi-messenger astronomy (MMA) with the discovery of the binary neutron star coalescence GW170817 and its associated short gamma-ray burst GRB170817A. The intensive follow-up of the event with ground and space instruments led to the discovery of a bright optical counterpart, AT2017gfo, the identification of the host galaxy, and on longer timescales, the observations of the X-ray and radio counterparts. This global picture helped to have a better understanding of the physics of strong-gravity as well as constrains on astrophysical models related to matter during the merger and post-merger phase. With improved sensitivity of the detectors, the upcoming year-long third observing run (O3) promises many merging binaries with an expected number of BNS mergers in the range 1-50.

　　To face new challenge, we are building a telescope network GRANDMA (Ground Rapid Advanced Network Devoted to Multi-messenger Addicts) composed by 10 robotics and wield field telescopes spread all over the world in order to rapidly scan the sky localization area of gravitational waves alerts, associated to dedicated online detection pipelines and deeper follow-up spectrometry and spectroscopy facilities. As member of the LIGO-Virgo collaboration and PI of the GRANDMA collaboration, I will present the O3 multi-messenger campaign and expectation for GRANDMA follow-up. I will explain as well to a dedicated offline search done for the GRANDMA/Virgo to find additional GRB associated to GW events.

　　个人简介：

　　Sarah Antier has been graduated from Paris-Saclay University in 2016: her phd subject was about gamma-ray bursts observed by the space instrument ECLAIRs onboard the future french-chinese mission SVOM. She is now at APC/Paris 7 university as a CNES postdoctoral fellow. She is working on multi-messenger activities. First, she is PI of the telescope network GRANDMA, dedicated to follow-up of O3 GW alerts. She is responsible for the Virgo collaboration of the EM follow-up group buliding the O3 GW alert program. Finally, she works on GRB detection algorithm associated to GW and physics of prompt of gamma-ray bursts. Note that she also received the L'oréal-Unesco prize to promote women in Science in 2018.