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Optical Follow-up of Gravitational-wave Events during the Second Advanced LIGO/VIRGO Observing Run with the DLT40 Survey
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Number of Authors: 102019 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 875, no 1, article id 59Article in journal (Refereed) Published
Abstract [en]

We describe the gravitational-wave (GW) follow-up strategy and subsequent results of the Distance Less Than 40 Mpc survey (DLT40) during the second science run (O2) of the Laser Interferometer Gravitational-wave Observatory and Virgo collaboration (LVC). Depending on the information provided in the GW alert together with the localization map sent by the LVC, DLT40 would respond promptly to image the corresponding galaxies selected by our ranking algorithm in order to search for possible electromagnetic (EM) counterparts in real time. During the LVC O2 run, DLT40 followed 10 GW triggers, observing between similar to 20 and 100 galaxies within the GW localization area of each event. From this campaign, we identified two real transient sources within the GW localizations with an appropriate on-source time-one was an unrelated SN Ia (SN 2017cbv), and the other was the optical kilonova, AT 2017fgo/SSS17a/DLT17ck, associated with the binary neutron star (BNS) coalescence GW170817 (a.k.a gamma-ray burst GRB 170817A). We conclude with a discussion of the DLT40 survey's plans for the upcoming LVC O3 run, which include expanding our galaxy search fields out to D approximate to 65 Mpc to match the LVC's planned three-detector sensitivity for BNS mergers.

Place, publisher, year, edition, pages
2019. Vol. 875, no 1, article id 59
Keywords [en]
gravitational waves, methods: observational, supernovae: general
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-169040DOI: 10.3847/1538-4357/ab0e06ISI: 000464984900013OAI: oai:DiVA.org:su-169040DiVA, id: diva2:1319037
Available from: 2019-05-29 Created: 2019-05-29 Last updated: 2019-05-29Bibliographically approved

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Sand, David J.Tartaglia, Leonardo
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Department of AstronomyThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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