Chandra X-Ray Observatory

CDA - News Item 030

Data Analysis Links
CDA Status
  • The archive is fully functional.
Reprocessing Status
    Reprocessing IV has been completed in December 2014.
Current Software Releases
  • ASCDSVER: 10.12.6
  • CALDBVER: 4.11.1
What's New
  • Electrical Outage 11/05/21 - 11/06/21
    There will be a planned electrical outage Friday, November 5 2021, 5:30PM - Saturday, November 6 2021, 6:00PM EDT. During this time period ChaSeR and other archive interfaces will be unavailable.
  • Electrical Outage on 07/28/21
    There will be a planned electrical outage Wednesday, July 28 2021, 8:00PM - 10:00PM EDT. During this time period ChaSeR and other archive interfaces will be unavailable.
  • Downtime on 6/12/21
    Due to electrical work, the public interfaces of the Chandra Data Archive will not be available on Saturday 6/12 from 4 AM to 9 PM.
  • Repro V Begins
    The fifth major reprocessing of the archive (Repro V) has started! Details can be found here.
  • Past Notices
News Item 030

New Data Distribution Procedures


As of 1 December 2004, CXC Operations are running DS Release 7.4. This release includes a large number of changes in the way data are being handled, with two changes that will be very visible to the users.

  1. The software that creates the V&V reports has been completely replaced. Consequently, they will look different and they will be in PDF format. The primary package will contain a V&V report that is similar in length to what you are used to. The secondary package will, in addition, contain a V&V reference document (also PDF) that is considerably longer and contains much more detail
  2. The on-line data distribution will no longer work through pre-packaged tar files that are put in an ftp staging area. Users (PIs and Observers) will still be notified that new data have become available, but they will be directed to retrieve the data through WebChaSeR using its login feature (either the proposal or PI account) as long as the data are proprietary; the e-mail message will contain a reminder of relevant information. Please note that anybody can retrieve the non-proprietary data products for a proprietary observation. But one needs to be logged in to the authorized PI or proposal account in order to have the proprietary products (in particular, the event files and the images) included in the retrieval package.

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Last modified: 2019-08-26

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