How Much X-Ray and Gamma-ray Data Are in the HEASARC's Archive?
Last Update: 2017 February 14
As of this date, there were about 85 Terabytes (TB = 1 billion kB) of X-ray and gamma-ray data in the HEASARC's high-energy archive, compared to 38 TB in April 2012, 1.8 TB at the start of 2000 and 0.3 TB at the start of 1995. Recent growth has been mostly due to the increasing size of the Swift (now 24.6 TB), Fermi (now 16.0 TB), INTEGRAL (now 13.7 TB), and XMM-Newton (now 8.5 TB). Other HEASARC missions which are currently being archived include Chandra (now 2.5 TB) and NuSTAR (now 1.4 TB). Data volumes from older missions are typically much smaller, except for the recently ended Suzaku (6.5 TB), RXTE (2.7 TB) and BeppoSAX (1.3 TB) missions.
For more detailed statistics, including a breakdown of the data holdings by mission, check out the HEASARC Usage Statistics webpage.
Figure 1: Growth of the HEASARC High-Energy Data Archive and Annual Volume Downloaded by Users.
Web page author and maintainer: Stephen A.
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Last modified: Tuesday, 14-Feb-2017 10:27:28 EST