GW190814 follow-up with the optical telescope MeerLICHT
Autor: | Marc Klein-Wolt, Kerry Paterson, Elmar Körding, S. de Wet, R. S. Le Poole, D. L. A. Pieterse, Steven Bloemen, Vanessa McBride, Paul J. Groot, Patrick A. Woudt, Paul Vreeswijk |
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Rok vydání: | 2021 |
Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Gravitational wave Astronomy FOS: Physical sciences Astronomy and Astrophysics Context (language use) Astrophysics Kilonova Astrophysics - high energy astrophysical phenomena 01 natural sciences Stars: neutron Optical telescope LIGO Gravitational waves law.invention Telescope Space and Planetary Science Observatory law 0103 physical sciences Stars: black holes 010306 general physics 010303 astronomy & astrophysics Event (particle physics) |
Zdroj: | Astronomy & Astrophysics, 649, 1-7 Astronomy and Astrophysics, 649, 1-7 Astronomy & Astrophysics, 649, pp. 1-7 |
ISSN: | 1432-0746 0004-6361 |
DOI: | 10.1051/0004-6361/202040231 |
Popis: | The Advanced LIGO and Virgo gravitational wave observatories detected a signal on 2019 August 14 during their third observing run, named GW190814. A large number of electromagnetic facilities conducted follow-up campaigns in the search for a possible counterpart to the gravitational wave event, which was made especially promising given the early source classification of a neutron star-black hole merger.We present the results of the GW follow-up campaign taken with the wide-field optical telescope MeerLICHT, located at the South African Astronomical Observatory Sutherland site. We use our results to constrain possible kilonova models. MeerLICHT observed more than 95% of the probability localisation each night for over a week in three optical bands (u,q,i) with our initial observations beginning almost 2 hours after the GW detection. We describe the search for new transients in MeerLICHT data and investigate how our limiting magnitudes can be used to constrain an AT2017gfo-like kilonova. A single new transient was found in our analysis of MeerLICHT data, which we exclude from being the electromagnetic counterpart to GW190814 due to the existence of a spatially unresolved source at the transient's coordinates in archival data. Using our limiting magnitudes, the confidence with which we can exclude the presence of an AT2017gfo-like kilonova at the distance of GW190814 was low ($ 19 pages, 6 figures, accepted by A&A |
Databáze: | OpenAIRE |
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