Lasair: The Transient Alert Broker for LSST:UK

K. W. Smith, D. R. Young, Amanda Ibsen Osorio, S. J. Smartt, Andrew Lawrence, David Morris, Stelios Voutsinas, Matt Nicholl

Research output: Working paperDiscussion paper

Abstract / Description of output

Current and next-generation time-domain surveys will produce more data than ever before. The Zwicky Transient Facility (ZTF; Kulkarni 2018; Bellm et al. 2019) generates up to ~106 alerts3 (individual photometric data points of time-variable sources) per night (Patterson et al. 2019), while the Large Synoptic Survey Telescope (LSST; LSST Science Collaboration et al. 2009) is expected to produce up to ~107 alerts per night. However there are significant computational challenges in processing these data into a digestible format, in near real-time, in order to identify interesting transients and trigger follow-up such as spectroscopy and observations in other wavelength regimes. To this end, we present Lasair,4 the transient alerts broker for the LSST:UK collaboration. In preparation for LSST's data stream, Lasair ingests the ZTF public alert stream into a relational database, assimilates the alerts into objects, and produces lightcurves and reliable cross-matches to star and galaxy catalogs. Lasair can be viewed and queried through a web browser5 and we provide simple example streams of interesting objects, as well as access to a full SQL search engine. Registration to the website is optional, free, and open to all.
Original languageEnglish
Publication statusPublished - 31 Jan 2019

Publication series

NameResearch Notes of the AAS
PublisherIOP Publishing Ltd.


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