Chandra X-Ray Observatory

CDA - Privacy Impact Assessment

Data Analysis Links
CDA Status
Reprocessing Status
Current Software Releases
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
Privacy Impact Assessment for the Chandra Data Archive (CDA)


The CDA Operations team collects and/or maintains personal information in the following contexts:

  1. The Chandra Users Database
  2. The CDA Special Requests Form
  3. ChaSeR

Collection of Information

All information is collected via web forms directly from the users and consists of:

No authentication is required.

Reason for information collection and intended use

Information is needed in order to respond to request (b,c), i.e., single use. Or information is needed for proposal handling, Newsletter and Bulletin distribution, grant distribution, data distribution (a).

Sharing of information

Information is shared with CXC staff (a), CXC-DS Operations staff if necessary (b), or no one (c).

Consent and corrections

In all cases the information is provided by the user and it is the user's responsibility to provide corrections. The service for which the information is being collected cannot be provided without it or when the information is incorrect. However, in the case of the Chandra Users Database we will make all reasonable efforts to update the information when it is found to be obsolete.


Information for (c) is discarded after use. Information for (a) and (b) is kept in a database with controlled access, only granted to staff with a need to have access.

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Last modified: 2020-04-06

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