by: Victoria Fawcett, Durham University July 22, 2021 As the main DESI survey gets truly underway, I want to reflect on the amazing quality of the DESI quasar spectra observed so far. Quasars are incredibly luminous types of Active Galactic Nuclei (AGN), which consist of a supermassive black hole at the centre of galaxies, surrounded […]
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The Beginnings of the 3-Dimensional Map
by: David Schlegel, DESI Project Scientist July 22, 2021 Only eight weeks into DESI’s five-year mission, a 3-dimensional map of the universe is starting to take shape. Plotted below is a “pie diagram” slice through the universe, with earth in the lower left, looking out in the directions of the constellations Virgo, Serpens and Hercules […]
Siena Galaxy Atlas 2020 publicly released by DESI Legacy Imaging Surveys team
The DESI Legacy Imaging Surveys team is pleased to announce the public release of the Siena Galaxy Atlas 2020 (SGA-2020), a value-added supplemental catalog to imaging Data Release 9 (DR9). The SGA-2020 is a multiwavelength atlas of 383,620 nearby galaxies selected over the 20,000 square-degree imaging footprint based on their (large) apparent angular diameter. It has […]
