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- W3143341350 abstract "We present an overview of the SkyMapper optical follow-up program for gravitational-wave event triggers from the LIGO/Virgo observatories, which aims at identifying early GW170817-like kilonovae out to $sim 200$ Mpc distance. We describe our robotic facility for rapid transient follow-up, which can target most of the sky at $delta<+10deg $ to a depth of $i_mathrm{AB}approx 20$ mag. We have implemented a new software pipeline to receive LIGO/Virgo alerts, schedule observations and examine the incoming real-time data stream for transient candidates. We adopt a real-bogus classifier using ensemble-based machine learning techniques, attaining high completeness ($sim$98%) and purity ($sim$91%) over our whole magnitude range. Applying further filtering to remove common image artefacts and known sources of transients, such as asteroids and variable stars, reduces the number of candidates by a factor of more than 10. We demonstrate the system performance with data obtained for GW190425, a binary neutron star merger detected during the LIGO/Virgo O3 observing campaign. In time for the LIGO/Virgo O4 run, we will have deeper reference images allowing transient detection to $i_mathrm{AB}approx $21 mag." @default.
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- W3143341350 date "2021-01-01" @default.
- W3143341350 modified "2023-10-16" @default.
- W3143341350 title "SkyMapper optical follow-up of gravitational wave triggers: Alert science data pipeline and LIGO/Virgo O3 run" @default.
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- W3143341350 doi "https://doi.org/10.1017/pasa.2021.17" @default.
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