Follow-up observations with the Chandra X-ray Observatory showed the source had disappeared.
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In this instance, we were fortunate to catch a source changing extremely quickly, which is very exciting. In a study published in the Astrophysical Journal , Earnshaw and colleagues look at what could have caused the bright flash. Observations showed there was no visible light from the burst, indicating it could not have been a supernova. Instead, the team say it could be a black hole consuming a nearby star—as gravity from the black hole drags it inwards, material at the edge moves extremely fast and heats up, producing X-rays. Normally, ULXs are long lived, having been created by an object like a black hole slowly feeding on a nearby star for an extended period.
THE MYSTERY OF THE GREEN RAY (British Mystery Classic) by William Le Queux | Waterstones
A black hole that swiftly consumes a star in a single event would be a far rarer event. Another event that could have produced the flash is a neutron star—an incredibly small, dense object that forms from the collapsed core of a giant star. Neutron stars generate extremely strong magnetic fields that pull material down to the surface, which produces X-rays. This idea has its problems, however.
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He was also a diplomat, a traveller, a flying buff who officiated at the first British air meeting at Doncaster in , and a wireless pioneer who broadcast music from his own station long before radio was generally available. He studied painting in Paris. He was foreign editor of The Globe newspaper during the s.
He subsequently wrote professionally. He reported on the First Balkan War.
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He wrote in the genres of mystery, thriller, and espionage, particularly in the years leading up to World War I. Apart from fiction he wrote extensively on wireless broadcasting, various travel works including An Observer in the Near East and several short books on Switzerland, and an unrevealing and often misleading autobiography, Things I Know about Kings, Celebrities and Crooks.
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