Back to Volume
Paper: Publishing Gaia Science Alerts
Volume: 521, Astronomical Data Analysis Software and Systems XXVI
Page: 507
Authors: Delgado, A.; Rixon, G.; van Leeuwen, G.; Hodgkin, S.; Harrison, D.; van Leeuwen, F.; Yoldas, A.
Abstract: The goal of the Gaia Science Alerts project is to find transient events in the Gaia data stream as it maps the Milky Way. The data are transmitted from the spacecraft every day, and received and processed at the Institute of Astronomy (Cambridge, UK), where the Gaia Photometric Science Alerts system extracts the transient candidates. Once identified, a Python application Gaia Science Alerts (GSA) Publisher checks whether they are indeed new discoveries by Gaia. For this purpose, an ETL (Extract, Transform, Load) system gathers the data reported by other major transient survey websites, and the Gaia alert candidates are cross-matched against these external data. Additionally, the application checks online for the latest TNS (Transient Name Server) discoveries, and connects to Skybot to identify possible coincident small Solar system objects. The GSA application makes selected alerts publicly available, by generating per-alert web pages which contain detailed scientific information per source, including lightcurves, spectra, finding charts and photometric follow-up when available. On publication the Gaia transients are broadcast, to the TNS Server, as VOEvents, to the GaiaAlerts mobile application and to Gaia in the UK website. The application also updates the published alerts' web pages with the latest data from Gaia as it comes in.
Back to Volume