Chandra X-Ray Observatory

Chandra Deep Field South


Data | Announcements | Public Info | Results

The Chandra Deep Field South (CDF-S) represents the longest exposure on any field obtained with the Chandra X-ray Observatory to date. Chandra pointed at the same area of the sky for approximately 44 days. The final image is the result of the co-addition of 52 individual Chandra ACIS-I exposures.

Principal Investigator Riccardo Giacconi originally led the CDF-S project in 1999, followed by Niel Brandt in 2007. In 2010, the CXC director Harvey Tananbaum awarded an additional 2 Msec Director's Discretionary Time to the project.

This series of observations has become the center of one of the most comprehensive multi-wavelength campaigns ever carried out with ground and space-based observatories.

CDF-S combined image

Smoothed, enhanced image of the combined 2000, 2007, and 2010 data

CDF-S Data

Download CDF-S Data from the Archive

CDF-S observations are centered on:

RA(ICRS) =033228.2
Dec(ICRS) =-274836.0

The following types of products are available:



Due to a problem with bad pixel processing in one of the 2010 CDF-S observations (ObsId 12218), a small percentage of its events were improperly omitted in the CDF-S merged dataset released on 20 August 2010, with Chandra Announcement 61. This involved almost 6000 events (out of 200,000) with Time > 392706012, CCD_ID = 0, and CHIPY > 512. A corrected event file for ObsId 12218 was released on 1 September 2010, identified by "N002". The 2010 and 2000-2007-2010 merged products were also regenerated, identified as "N002", and released on the same date.

We caution that the problem may occur for this ObsId (12218) if a user re-runs acis_build_badpix or acis_run_hotpix (which calls acis_build_badpix), for example following the CIAO bad pixel science thread.

CDF-S in the News


GOODS Missing Black Hole Report: Hundreds Found!



GOODS CDF-S 033213.9-275000: Hidden Black Holes Uncovered by Combined Effort of NASA's Great Observatories



Deepest X-Rays Ever Reveal Universe Teeming With Black Holes


Astronomy Picture of the Day (2001)

External Information about CDF-S
CDF-S Results

Published Papers on CDF-S

Including CDF-S Dataset Identifier(s)

If you used CDF-S data in a paper you are writing, and if you are writing that paper using AASTeX, we request that you include the appropriate CDF-S Dataset Identifier in your manuscript.

The identifiers are:

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 © 1998-2024. All rights reserved.