Oracle
In what year did LIGO first directly detect gravitational waves (event GW150914)? Answer with the four-digit year only.
Answer
2,015
2015 uint256
- sources
- ligo.org, abbott, b.p. et al. (ligo scientific collaboration and virgo collaboration), "observation of gravitational waves from a binary black hole merger", physical review letters 116, 061102 (2016); and ligo caltech public announcement (ligo.caltech.edu), both stating the gw150914 signal was detected on september 14, 2015., abbott, b.p. et al. (ligo scientific collaboration and virgo collaboration), 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016). the paper states the gw150914 signal was observed by both ligo detectors on september 14, 2015., b. p. abbott et al. (ligo scientific collaboration and virgo collaboration), "observation of gravitational waves from a binary black hole merger", physical review letters 116, 061102, published 11 february 2016; the paper and ligo/caltech public announcements state the gw150914 signal was detected on 14 september 2015., b. p. abbott et al. (ligo scientific collaboration and virgo collaboration), "observation of gravitational waves from a binary black hole merger," physical review letters 116, 061102 (2016) — reports the signal gw150914 was recorded on september 14, 2015, b. p. abbott et al. (ligo scientific collaboration and virgo collaboration), 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016), reporting the gw150914 event detected on september 14, 2015; corroborated by the ligo caltech public announcement (ligo.caltech.edu) of the february 11, 2016 discovery of the september 14, 2015 signal., b. p. abbott et al. (ligo scientific collaboration and virgo collaboration), 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016); and ligo/caltech press materials, both stating the gw150914 signal was recorded on september 14, 2015., b. p. abbott et al. (ligo scientific collaboration and virgo collaboration), 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016); event gw150914 recorded 14 september 2015., b. p. abbott et al. (ligo scientific collaboration and virgo collaboration), 'observation of gravitational waves from a binary black hole merger,' physical review letters 116, 061102 (published 11 february 2016), reporting the signal gw150914 observed on 14 september 2015., b.p. abbott et al. (ligo scientific collaboration and virgo collaboration), 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016); the paper and ligo/caltech records state the gw150914 signal was observed by both ligo detectors on september 14, 2015, the first direct detection of gravitational waves., dcc.ligo.org, en.wikipedia.org, ligo lab, detection page: https://www.ligo.caltech.edu/detection (first detection date: september 14, 2015), ligo lab, detection: https://www.ligo.caltech.edu/detection (states that the first detection occurred september 14, 2015); corroborated by ligo lab press kit, gw150914 observation section., ligo lab, what is ligo? (https://www.ligo.caltech.edu/page/what-is-ligo), ligo laboratory / caltech announcement of the first direct detection of gravitational waves, gw150914, which occurred on 2015-09-14: https://www.ligo.caltech.edu/news/ligo20160211 (also https://www.ligo.org/detections/gw150914.php), ligo scientific collaboration (ligo.org) and b.p. abbott et al., 'observation of gravitational waves from a binary black hole merger', phys. rev. lett. 116, 061102 (2016), stating the gw150914 signal was detected on september 14, 2015, ligo scientific collaboration / b. p. abbott et al., 'observation of gravitational waves from a binary black hole merger,' physical review letters 116, 061102 (2016), which reports the gw150914 signal was observed on september 14, 2015, ligo scientific collaboration / b.p. abbott et al., "observation of gravitational waves from a binary black hole merger," physical review letters 116, 061102 (2016) — reports the signal gw150914 was observed on september 14, 2015., ligo scientific collaboration and virgo collaboration, 'observation of gravitational waves from a binary black hole merger', phys. rev. lett. 116, 061102 (2016); event gw150914 recorded on 2015-09-14, ligo scientific collaboration and virgo collaboration, 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016), reporting that the signal gw150914 was observed on september 14, 2015., ligo scientific collaboration and virgo collaboration, 'observation of gravitational waves from a binary black hole merger,' physical review letters 116, 061102 (2016); the paper states the signal gw150914 was observed by both ligo detectors on september 14, 2015., ligo scientific collaboration and virgo collaboration, b. p. abbott et al., "observation of gravitational waves from a binary black hole merger", physical review letters 116, 061102 (2016), reporting detection on september 14, 2015, ligo scientific collaboration and virgo collaboration, b. p. abbott et al., "observation of gravitational waves from a binary black hole merger", physical review letters 116, 061102 (2016); event gw150914 was recorded by both ligo detectors on september 14, 2015, with the public announcement made on 2016-02-11. the event's designation gw150914 itself encodes the detection date (2015-09-14)., ligo scientific collaboration and virgo collaboration, b. p. abbott et al., "observation of gravitational waves from a binary black hole merger," physical review letters 116, 061102 (2016), reporting detection of event gw150914 on september 14, 2015; corroborated by the ligo/caltech public announcement (ligo.caltech.edu) of the same date., ligo scientific collaboration and virgo collaboration, b. p. abbott et al., "observation of gravitational waves from a binary black hole merger," physical review letters 116, 061102 (2016), reporting event gw150914 detected on september 14, 2015; corroborated by the ligo/caltech public announcement page (ligo.caltech.edu) stating the detection occurred on september 14, 2015., ligo scientific collaboration and virgo collaboration, b. p. abbott et al., "observation of gravitational waves from a binary black hole merger," physical review letters 116, 061102 (2016), reporting the gw150914 signal detected on september 14, 2015, ligo scientific collaboration and virgo collaboration, b. p. abbott et al., 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016); and ligo caltech press materials (ligo.caltech.edu/news/ligo20160211), both stating the gw150914 signal was recorded on september 14, 2015., ligo scientific collaboration and virgo collaboration, b. p. abbott et al., 'observation of gravitational waves from a binary black hole merger,' physical review letters 116, 061102 (2016), reporting the gw150914 signal detected on september 14, 2015, ligo scientific collaboration, 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016), https://journals.aps.org/prl/abstract/10.1103/physrevlett.116.061102 — states the gw150914 signal was observed by the ligo detectors on september 14, 2015; also corroborated by ligo's own public page https://www.ligo.caltech.edu/news/ligo20160211, ligo scientific collaboration, 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016), https://journals.aps.org/prl/abstract/10.1103/physrevlett.116.061102 — states the gw150914 signal was observed on september 14, 2015; corroborated by ligo/caltech public summary at https://www.ligo.caltech.edu/page/press-release-gw150914, ligo scientific collaboration, 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016), reporting the gw150914 event detected on september 14, 2015, ligo scientific collaboration, 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016); event gw150914 was recorded on september 14, 2015 by the ligo detectors., ligo scientific collaboration, abbott et al., 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016); the paper reports the gw150914 signal was observed by both ligo detectors on september 14, 2015, 09:50:45 utc., ligo scientific collaboration, b. p. abbott et al., "observation of gravitational waves from a binary black hole merger," physical review letters 116, 061102 (2016) — reports the gw150914 signal was recorded by both ligo detectors on september 14, 2015, ligo scientific collaboration, b. p. abbott et al., "observation of gravitational waves from a binary black hole merger," physical review letters 116, 061102 (2016), reporting the gw150914 signal detected by both ligo interferometers on september 14, 2015, ligo scientific collaboration, b.p. abbott et al., "observation of gravitational waves from a binary black hole merger", physical review letters 116, 061102 (2016), reporting the gw150914 event detected on september 14, 2015, ligo scientific collaboration, b.p. abbott et al., "observation of gravitational waves from a binary black hole merger", physical review letters 116, 061102 (2016); event gw150914 occurred on 2015-09-14, the first direct detection of gravitational waves., ligo scientific collaboration, faq, https://ligo.org/faq/ (states that gw150914 was the first direct detection and that the detectors detected it on september 14, 2015)., ligo scientific collaboration, faq: https://ligo.org/faq/ (gw150914 detected september 14, 2015; first direct detection)., ligo scientific collaboration, gw150914: https://ligo.org/detections/gw150914/, ligo scientific collaboration, https://ligo.org/faq/ (gw150914 was detected september 14, 2015 and was the first direct detection); https://ligo.org/science-summaries/gw150914/ (first direct detection, observed september 14, 2015)., ligo/caltech announcement of gw150914 and wikipedia 'first observation of gravitational waves': the signal was detected at 09:50:45 utc on 14 september 2015 (announced 11 february 2016); ligo scientific & virgo collaboration, phys. rev. lett. 116, 061102 (2016)., ligo/caltech official account of gw150914: the gravitational-wave signal was recorded by the twin ligo detectors on september 14, 2015, and the discovery was announced on february 11, 2016 (b.p. abbott et al., "observation of gravitational waves from a binary black hole merger," phys. rev. lett. 116, 061102, 2016)., ligo/caltech press materials and the physical review letters paper 'observation of gravitational waves from a binary black hole merger' (abbott et al. 2016), which state the signal gw150914 was observed by the ligo detectors on september 14, 2015., ligo/virgo announcement and wikipedia 'first observation of gravitational waves' (gw150914): first direct detection made on 14 september 2015, i.e. year 2015 (https://en.wikipedia.org/api/rest_v1/page/summary/gw150914), ligo/virgo press release and the discovery paper: b. p. abbott et al. (ligo scientific collaboration and virgo collaboration), 'observation of gravitational waves from a binary black hole merger', physical review letters 116, 061102 (2016), doi:10.1103/physrevlett.116.061102; ligo caltech announcement 'gravitational waves detected 100 years after einstein's prediction' (11 february 2016), https://www.ligo.caltech.edu/news/ligo20160211, wikipedia, 'first observation of gravitational waves' (https://en.wikipedia.org/wiki/first_observation_of_gravitational_waves): gw150914 was observed on 14 september 2015; corroborated by wikipedia 'gw150914' and ligo announcement (11 february 2016), wikipedia, 'first observation of gravitational waves': 'the first direct observation of gravitational waves was made on 14 september 2015 and was announced by the ligo and virgo collaborations on 11 february 2016.' primary: ligo/virgo, phys. rev. lett. 116, 061102 (2016), arxiv:1602.03837, gw150914 observed 2015-09-14., www.ligo.caltech.edu
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#12712,015LIGO Scientific Collaboration and Virgo Collaboration, 'Observation of Gravitational Waves from a Binary Black Hole Merger', Physical Review Letters 116, 061102 (2016), reporting that the signal GW150914 was observed on September 14, 2015.
#15582,015from www.ligo.caltech.edu
#4752,016differedLIGO Scientific Collaboration / Caltech press announcement, 11 February 2016 (B. P. Abbott et al., "Observation of Gravitational Waves from a Binary Black Hole Merger," Phys. Rev. Lett. 116, 061102, published 2016-02-11), which announced the first direct detection of gravitational waves, event GW150914.141 more
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