NGC 4993 (also catalogued as NGC 4994 in the New General Catalogue) is a lenticular galaxy located about 140 million light-years away in the constellation...
18 KB (1,599 words) - 07:50, 7 May 2024
detectors on 17 August 2017, originating from the shell elliptical galaxy NGC 4993. The signal was produced by the last moments of the inspiral process of...
100 KB (5,734 words) - 22:19, 13 July 2024
collaborated to detect the electromagnetic counterpart, a kilonova in the galaxy NGC 4993, 40 megaparsecs away, emitting a short gamma ray burst (GRB 170817A) seconds...
104 KB (12,636 words) - 04:32, 12 July 2024
electromagnetic spectrum (AT 2017gfo) located in a relatively nearby galaxy, NGC 4993. Observations of AT 2017gfo confirmed that it was the first conclusive...
22 KB (2,193 words) - 13:01, 25 May 2024
Nicholas; Scott, M.Ransom (13 May 2019). "Long-Term Timing of Pulsars in NGC 6440: An Updated Mass Limit of Millisecond Pulsar J1748-2021B" (PDF). www...
39 KB (4,295 words) - 05:40, 17 June 2024
optical telescopes. August 2017: A neutron star collision in the galaxy NGC 4993 produced the gravitational wave signal GW170817, which was observed by...
17 KB (1,721 words) - 03:46, 27 June 2024
gravitational wave associated with the merger of two neutron stars in NGC 4993, an elliptical galaxy in the constellation Hydra. GW170817 co-occurred...
22 KB (2,325 words) - 01:24, 11 July 2024
observatories; first polarization measurement GW170817 12:41:04 2017-10-16 16; NGC 4993 33.0+0.0 −2.1 40±10 ≥ 0.04 1.186+0.001 −0.001 0.00+0.02 −0.01 NS 1.46+0...
202 KB (5,859 words) - 21:39, 5 July 2024
is of fairly uniform brightness throughout. Another notable galaxy is NGC 4993, an elliptical galaxy which was the source of events GW170817, GRB 170817A...
17 KB (1,866 words) - 17:27, 25 March 2024
DES concluded that the optical counterpart they have identified near NGC 4993 is associated with GW170817. This discovery ushers in the era of multi-messenger...
50 KB (5,471 words) - 01:43, 2 May 2024