Follow-up of gravitational wave alerts has proven to be challenging in the past due to the large uncertainty on the localisation, much larger than the field of view of most instruments. A smart pointing strategy helps to increase the chance of observing the true position of the underlying compact binary merger event and so to detect an electromagnetic counterpart. To tackle this, a software called tilepy has been developed and was successfully used by the H.E.S.S. collaboration to search for very-high energy gamma-ray emission from GWs during the O2 and O3 runs. The optimised tiling strategies implemented in tilepy allowed H.E.S.S. to be the first ground facility to point toward the true position of GW 170817. Here we present the main strategy used by the software to compute an optimal observation schedule. The Astro-COLIBRI platform helps to plan follow-up of a large range of transient phenomena including GW alerts. The integration of tilepy in this tool allow for an easy planning and visualisation of of follow-up of gravitational wave alert helping the astronomer to maximise the chance of detecting a counterpart. The platform also provides an overview of the multi-wavelength context by grouping and visualising information coming from different observatories alongside GW alerts.
NMMA-Astro-COLIBRI: An Automated Light-Curve Supernovae Classification Service in the Multi-Survey Era
Université Paris-Saclay – CEA – Irfu（巴黎萨克雷大学）；Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Artemis（蔚蓝海岸大学）；Laboratoire de Physique et de Chimie de l’Environnement, Université Joseph KI-ZERBO（约瑟夫基泽博大学）；Ecole d’ingénieurs aéronautique et spatiale (IPSA)（航空与航天工程师学院）；Universität Potsdam, Institut für Physik und Astronomie（波茨坦大学）
Astro-photography as an effective tool for Outreach and Education: IACT in exposition
在我们这个时代，图像是向广大受众传达信息的有力方式。通过使用令人惊叹的天文照片，科学可以在不同层次上有效地传播给各个年龄段的各种观众。事实上，天文摄影结合了美学吸引力和天文现象背后的科学说明。这是我们与文化协会PhysicalPub合作于2020年10月在意大利举办的“A che Punto è la NOTTE -天文摄影科学展”的目的。许多不同的作者，无论是个人还是专业或业余天文台，都被要求发送他们最好的照片。由科学委员会挑选的54幅天文图像分为三个不同的主题（夜景、深空、仪器），2000多名游客和11个学校团体观看了这些图像（尽管由于COVID大流行而处于困难时期）。通过专门开发的网络应用程序在线提供的免费语音导游为自助导游提供了图像的科学解释。还组织了会议和导游。是次展览的重点是MAGIC望远镜的四面镜子，以及一个应科院的比例模型，让观众深入了解成像大气切伦科夫望远镜（IACT）的工作原理，并介绍甚高能量宇宙辐射的科学。我们将总结组织这次活动的主要困难和我们从游客那里得到的反馈。该展览仍然可以在线观看，访问网站mostrascientifica.it或通过guida.mostrascientifica.it的网络音频指南（英语和意大利语）。
