Chandra X-Ray Observatory

CDA - News Item 008

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
  • CALDBVER: 4.10.8
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 008

Chandra/Hubble Deep Field North (Superseded)

The data from the Chandra/Hubble Deep Field North are public as of 20 April 2001. Click for PostScript image.

For convenient download, we have pre-packaged the data products in the following three tar files and a Verification & Validation directory.

Note: The 12 ObsIds have been merged into single event and image files, after careful alignment and reprojection to a common coordinate system. Hence, these products differ from what one would get by downloading the individual ObsIds' products.

Note that these files are free from any alignment errors and that the absolute coordinates are believed to be correct.

[In order not to exceed a 2GB file size, the Level 1 event files are packaged into two files.]

File Size (MB) Contents
cdfn_p_l2.tar 134 Primary products: Level 2
cdfn_p_l1.tar 1756 Primary products: Level 1
cdfn_s.tar 227 Secondary products
V&V directory 0.1 V&V reports

We have also pre-packaged the data products in single tarfiles by ObsId.

The CDFN comprises the following observations (click on the ObsId to retrieve the data, on the SeqNum to see the image):

ObsIdSize (MB)SeqNumSourceExposure (ks)
580132 900001 HUBBLE DEEP FIELD 50.067
966156 900026 HUBBLE DEEP FIELD 58.182
967153 900027 HUBBLE DEEP FIELD 58.170
957138 900024 HUBBLE DEEP FIELD 58.179
2344259 900030 HDF NORTH 91.999
238621 900030 HDF NORTH 9.973
1671343 900030 HDF NORTH 169.046
2232271 900059 HDF-N 130.953
2421133 900061 HDF-N 62.465
2234358 900061 HDF-N 168.000
2423146 900060 HDF-N 69.325
2233146 900060 HDF-N 63.900

This page maintained by the Chandra Data Archive (

Last modified: 2019-08-26

Smithsonian Institute Smithsonian Institute

The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA.   Email: Smithsonian Institution, Copyright © 1998-2019. All rights reserved.