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The first run, O1, ran from September 12, 2015, to January 19, 2016, and succeeded in its first gravitational wave detection. O2 ran for a greater duration, from November 30, 2016, to August 25, 2017. [3] O3 began on April 1, 2019, which was briefly suspended on September 30, 2019, for maintenance and upgrades, thus O3a.
ERG was one of the earliest recorded biological potential. The first known ERG was recorded by the Swedish physiologist Alarik Frithiof Holmgren, who recorded it in 1865 on an amphibian retina. [12] However, he failed to understand his findings accurately. He thought the responses he recorded were from the optic nerve instead of the retina. [13]
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. [ 3 ] [ 4 ] [ 5 ] Previously, gravitational waves had been inferred only indirectly, via their effect on the timing of pulsars in binary star systems.
The Chandra X-ray source detected in UHZ1 is Compton-thick. [a] It has a bolometric luminosity of L bol ~ 5 × 10 45 erg s × 10 −1, corresponding to an estimated BH mass of ~ 4 × 10 7 M⊙.
This was the first time that these observations were made when the GRB was still bright and active. [5] The source of the GRB was a possible black hole, within the Delphinus constellation, [6] about 9 billion light-years (light travel distance) away (a redshift of z = 1.406). [7] It had a fluence of 5.7×10 −4 erg cm −2, and energy of 5 × ...
The number of photons detected suggested a luminosity of 1 × 10 38 erg/s for the source. [8] A compact radio source at this position was detected on December 1 from the NRAO Very Large Array. [9] This was the first type II-p supernova to be detected at both X-ray and radio wavelengths. [10]
AT 2021lwx (also known as ZTF20abrbeie or "Scary Barbie" [2]) is the most energetic non-quasar optical transient astronomical event ever observed, with a peak luminosity of 7 × 10 45 erg per second (erg s −1) and a total radiated energy between 9.7 × 10 52 erg to 1.5 × 10 53 erg over three years.
These detected energies are far more than GRB 190114C, which had up to 1 TeV of energy, [23] and GRB 190829A, which had up to 3.3 TeV of energy, [24] with 221009A being the first and only GRB so far to have photons above 10 TeV.