TY - JOUR
T1 - Optical Follow-up of Gravitational-wave Events during the Second Advanced LIGO/VIRGO Observing Run with the DLT40 Survey
AU - DLT40 Collaboration
AU - Yang, Sheng
AU - Sand, David J.
AU - Valenti, Stefano
AU - Cappellaro, Enrico
AU - Tartaglia, Leonardo
AU - Wyatt, Samuel
AU - Corsi, Alessandra
AU - Reichart, Daniel E.
AU - Haislip, Joshua
AU - Kouprianov, Vladimir
N1 - Funding Information:
2019-04-10 2019-04-16 16:45:09 cgi/release: Article released bin/incoming: New from .zip Chinese Scholarship Council 201506040044 National Science Foundation AST-1821967 1821987 1813708 1813466 National Science Foundation AST-1813176 National Science Foundation PHY-1066293 National Science Foundation 1455090 yes
Publisher Copyright:
© 2019. The American Astronomical Society. All rights reserved.
PY - 2019/4/10
Y1 - 2019/4/10
N2 - 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 ∼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 ≈ 65 Mpc to match the LVC's planned three-detector sensitivity for BNS mergers.
AB - 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 ∼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 ≈ 65 Mpc to match the LVC's planned three-detector sensitivity for BNS mergers.
KW - gravitational waves
KW - methods: observational
KW - supernovae: general
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U2 - 10.3847/1538-4357/ab0e06
DO - 10.3847/1538-4357/ab0e06
M3 - Article
AN - SCOPUS:85067191029
VL - 875
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
M1 - 59
ER -