On the need of optical polarimetry follow up of flaring AGN in Gaia alerts

BOOK 11th OPTICON Gaia Science Alerts Workshop 2020 18-22 January 2021 from the comfort of our homes around the world The titles are sorted alphabetically by speakers’ surnames Workshop’s agenda on-line: https://web1.ast.cam.ac.uk/ioa/wikis/gsawgwiki/index.php/Workshop2020:agenda TDEs overview Iair Arcavi Tel Aviv University The OMEGA Key Project : detection of cold planets and stellar remnants in the entire Milky Way Etienne Bachelet Las Cumbres Observatory Thanks to the new generation of all-sky surveys such as Gaia, it is now possible to detect microlensing events in the entire sky. However, these surveys do not provide sufficient cadence to well constrain the microlensing models and can also miss planetary deviation. The OMEGA Key Project intends to provide an photometric and spectroscopic follow-up of these events automatically, to start the mapping of exoplanets and stellar remnants in the entire Milky Way. I will describe the observing strategy, as well as the hardware and software architecture developed and finally present the first results. Monitoring the sky with HATPI Gaspar Bakos Princeton University HATPI is a 64 camera mosaic system that will monitor the entire visible sky from Chile at very high precision, fast cadence, and at any given time conditions permit. I foresee strong possible synergies with GAIA. On the need of optical polarimetry follow up of flaring AGN in Gaia alerts Dmitry Blinov Institute of Astrophysics, FORTH, Greece After the Gaia data releases it has been found that thousands of AGN demonstrate significant positional offsets (1 10 mas) between radio (VLBI) and optical (Gaia) positions of active galactic nuclei (AGNs). These offsets tend to be parallel to the parsec-scale jet direction, which indicates that they are caused by astrometrically resolved structures in AGN. In this brief talk I will discuss how a polarimetric follow-up of Gaia alerts on flaring AGN could help to resolve numerous questions about AGN physics. Educational telescope at Mt. Kent Karsten Brogaard Stellar astrophysics Centre, Aarhus University A new educational telescope at Mt. Kent in Australia will be made available to all the upper secondary schools in Denmark so that it can be remote controlled in daytime (due to the time difference). I will present the current status and outlook, and how this might connect to your science. Overluminous transients in Gaia Alerts using photometric redshift Mateusz Bronikowski Astronomical Observatory, University of Warsaw