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eROSITA's Second Data Release Expands X-ray Universe Census
Confirmed
In Short: The German eROSITA Consortium has released its second data catalog, doubling the number of sources identified in the X-ray Universe.
The mission has conducted three full-sky scans, each pass increasing the depth and sensitivity of the catalog. The DR2 combines data obtained over the observatory's first 556 days of observations, which were stacked to capture more objects with fainter fluxes. The catalog also includes multi-wavelength information that connects detections with their most likely optical and infrared counterparts.
This release also coincides with the Sloan Digital Sky Survey's twentieth release (SDSS DR20), which includes considerable optical spectroscopy provided by eROSITA-DE's surveys. The DR2 significantly expands the catalog, nearly doubling the number of sources identified in the first release.
However, the focus on data center regulations in Michigan highlights a different issue. Only one congressional candidate in Michigan has signed a formal pledge to enact comprehensive regulations on the projects if elected to office. Barrett, a Republican, was the only candidate listed on the organization’s website as having signed the pledge as of September 3.
Lawrence, a spokesperson for the organization, stated, 'Americans have always had a healthy skepticism of concentrated power, and it’s time for our elected leaders to step up and hold AI companies and data center developers accountable.' Barrett's record, however, shows a different stance, as he was among the Republicans who voted for President Trump's One Big Beautiful Bill Act, which included $83 billion in tax breaks for data centers.
What's confirmed
- The mission has conducted three full-sky scans, each pass increasing the depth and sensitivity of the catalog. The DR2 combines data obtained over the observatory's first 556 days of observations, which were stacked to capture more objects with fainter fluxes. The catalog also includes multi-wavelength information that connects detections with their most likely optical and infrared counterparts.
- This release also coincides with the Sloan Digital Sky Survey's twentieth release (SDSS DR20), which includes considerable optical spectroscopy provided by eROSITA-DE's surveys. The DR2 significantly expands the catalog, nearly doubling the number of sources identified in the first release.
- However, the focus on data center regulations in Michigan highlights a different issue. Only one congressional candidate in Michigan has signed a formal pledge to enact comprehensive regulations on the projects if elected to office. Barrett, a Republican, was the only candidate listed on the organization’s website as having signed the pledge as of September 3.
- Lawrence, a spokesperson for the organization, stated, 'Americans have always had a healthy skepticism of concentrated power, and it’s time for our elected leaders to step up and hold AI companies and data center developers accountable.' Barrett's record, however, shows a different stance, as he was among the Republicans who voted for President Trump's One Big Beautiful Bill Act, which included $83 billion in tax breaks for data centers.
What's still developing
- The mission launched in 2019 and has delivered deep, sharp images over very large areas of the sky to map the high-energy Universe.
- From this data, the team concluded that about 88% of the identified sources are extragalactic, predominantly from the actively accreting supermassive black holes (SMBHs) at the center of galaxies beyond our own.
- Said William Roster, the lead author of the corresponding study: The most luminous black holes at high redshift are like needles in a haystack.
- This past summer, the German eROSITA Consortium made its second data release (DR2), the most comprehensive catalog of the X-ray Universe ever released.
- Combining data from three full-sky scans, the DR2 lists over 1.9 million point-like sources (primarily stars and actively accreting black holes) and about 64,000 extended sources, including galaxy clusters and supernova remnants (neutron stars and active black holes) - almost double the sources in the original release.
- The pledge also calls for an “AI dividend” that would be funded by data center developers and paid directly to workers who are displaced by advancements in artificial intelligence.
- “Barrett wants to reinvent himself as a data center fighter but his record says the opposite,” Ravi Mangla, a spokesperson for the Working Families Party, told The American Prospect.