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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]
First short burst with a detected afterglow and a possible host galaxy (not unique). GRB 050709: z = 0.161 [Ref 6] HETE-2: First short burst with a detected optical counterpart. GRB 050724: z = 0.258 [Ref 7] Swift: First short burst with a detected radio, optical, and X-ray counterpart, as well as an unambiguous association with an elliptical ...
The earliest evidence of life found in a stratigraphic unit, not just a single mineral grain, is the 3.7 Ga metasedimentary rocks containing graphite from the Isua Supracrustal Belt in Greenland. [3] The earliest direct known life on Earth are stromatolite fossils which have been found in 3.480-billion-year-old geyserite uncovered in the ...
The discovery of the molar was made in a cave – known as Grotte Mandrin – in France’s Rhone Valley. Tooth ‘earliest known evidence of humans in Europe’ Skip to main content
[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⊙. [ 7 ] [ 8 ] [ 9 ] The data collected from UHZ1 and its quasar are in agreement with prior theoretical predictions by astronomers for a unique class of transient, high-redshift objects known as Overmassive (or ...
With a radiated isotropic-energy of around 1.2×10 55 erg [9] or even 3×10 55 erg, [55] to as high as 1.4×10 57 erg, [56] GRB 221009A, together with events such as 1.5×10 53 AT 2021lwx, the 10 61 erg MS 0735.6+7421 event, and the 5×10 61 erg Ophiuchus Supercluster eruption, are among the most energetic events ever.
The first GRB afterglow to be discovered was the X-ray afterglow of GRB 970228, [3] which was detected by BeppoSAX, an Italian–Dutch satellite originally designed to study X-rays. [ 4 ] On Thursday May 8, 1997, at 21:42 UTC, BeppoSAX's Gamma Ray Burst Monitor registered a gamma-ray burst that lasted approximately 15 seconds.
An erg is the amount of work done by a force of one dyne exerted for a distance of one centimetre. In the CGS base units, it is equal to one gram centimetre-squared per second-squared (g⋅cm 2 /s 2). It is thus equal to 10 −7 joules or 100 nanojoules in SI units. 1 erg = 10 −7 J = 100 nJ; 1 erg = 10 −10 sn⋅m = 100 psn⋅m = 100 ...