How Much X-Ray and Gamma-ray Data Are in the HEASARC's Archive?
Last Update: 2015 August 07
As of August 2015, there were about 70 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 18.5 TB), Fermi (now 17.2 TB), INTEGRAL (now 12.3 TB), XMM-Newton (now 6.6 TB) and Suzaku (now 6.2 TB) archives. Other HEASARC missions which are currently being archived include Chandra (now 2.3 TB) and NuSTAR (now 1.2 TB). Data volumes from older missions are typically much smaller, except for the recently ended 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: Friday, 07-Aug-2015 15:57:22 EDT