查看更多>>摘要:By a News Reporter-Staff News Editor at Robotics & Machine Learning Daily News Daily News – New research on Machine Learning is th e subject of a report. According to news reporting originating in Budapest, Hung ary, by NewsRx journalists, research stated, “Herschel operated as an observator y, and therefore it did not cover the whole sky, but still observed similar to 8 % of it. The first version of an overall Herschel/PACS Point Sourc e Catalogue (PSC) was released in 2017.” Funders for this research include European Union (EU), International Space Scien ce Institute (ISSI) in Bern, through ISSI International Team project, Hungarian Academy of Sciences, European Space Agency. The news reporters obtained a quote from the research from Research Center for A stronomy, “The data are still unique and are very important for research using f ar-infrared information, especially because no new far-infrared mission is fores een for at least the next decade. In the framework of the NEMESIS project, we re visited all the photometric observations obtained by the PACS instrument on-boar d the Herschel space observatory, using more advanced techniques than before, in cluding machine learning techniques. Our aim was to build the most complete and most accurate Herschel/PACS catalogue to date. Our primary goal was to increase the number of real sources, and decrease the number of spurious sources identifi ed on a strongly variable background, which is due to the thermal emission of th e interstellar dust, mostly located in star-forming regions. Our goal was to bui ld a blind catalogue, meaning that source extraction is conducted without relyin g on prior detections at various wavelengths, allowing us to detect sources neve r catalogued before. The methods for data analysis have evolved continuously sin ce the first release of a uniform Herschel/PACS catalogue. We define a hybrid st rategy that includes classical and machine learning source identification and ch aracterisation methods that optimise faint-source detection, providing catalogue s at much higher completeness levels than before. Quality assessment also involv es machine learning techniques. Our source extraction methodology facilitates a systematic and impartial comparison of sensitivity levels across various Hersche l fields, a task that was typically beyond the scope of individual programmes. W e created a high-reliability and a rejected source catalogue for each PACS passb and: 70, 100, and 160 mu m. With the high-reliability catalogue, we managed to s ignificantly increase the completeness in all bands, especially at 70 mu m. At t he same time, while the number of high-reliability detections decreased, the num ber of sources matching with existing catalogues increased, suggesting that the purity is also higher than before.”