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- W2912888597 abstract "Abstract On August 17, 2017 LIGO/Virgo detected a binary neutron star via gravitational waves. We observed 70 sq-degrees in the LIGO/Virgo spatial localization with the DECam on the 4m Blanco telescope covering 80% of the final map. Our group independently discovered an optical counterpart in NGC 4993. We searched our entire imaged region: the object in NGC 4993 was the only viable candidate. Our observations of NGC4993 show complicated morphology but simple star formation history. Our x-ray and radio observations indicate an off-axis jet as afterglow. Our high-cadence optical and infrared spectra show a source that must be described by at least two components, one of which is dominated by the r-process nucleosynthesis elements characteristic of a kilonova. Our modeling of the light curve demonstrates such a model in which 0.05 M ⊙ of material is ejected from the system. Finally, we discuss the first standard siren measurement of H 0 ." @default.
- W2912888597 created "2019-02-21" @default.
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- W2912888597 date "2017-10-01" @default.
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- W2912888597 title "Observations of GW170817 by DESGW and the DECam GW-EM Collaboration" @default.
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- W2912888597 doi "https://doi.org/10.1017/s1743921318000935" @default.
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