The Extended Chandra Deep Field-South Survey

This web site provides data files, including the X-ray source catalogs, as well as papers based on public data from the Extended Chandra Deep Field-South (E-CDF-S) survey. This survey consists of 4 Chandra ACIS-I pointings covering approximately 1100 square arcminutes on the sky (~0.3 square degrees) surrounding the original Chandra Deep Field-South field to a depth of ~228 ks. This is the largest Chandra survey ever conducted at such depth. This public survey was performed as part of the approved guest observer program in Cycle 5 (proposal number 05900218; PI Niel Brandt). In the primary and secondary catalogs available below, 651 unique sources were found --- 587 X-ray sources in the primary catalog and 64 X-ray sources in the secondary catalog. The differential and cumulative flux distributions are in good agreement with the number counts from previous deep X-ray surveys and with the predictions from an AGN population synthesis model that can explain the X-ray background. In general, fainter sources have harder X-ray spectra, consistent with the hypothesis that these sources are mainly obscured AGN. The multiwavelength properties of these sources, studied as part of the one-square-degree MUltiwavelength Survey by Yale/Chile (MUSYC; Gawiser et al. 2005), will be the subject of forthcoming papers. On the right is a "false color" image of the E-CDF-S field created in DS9. Here, the soft 0.5--2.0 keV band is colored red, the hard 2.0--4.0 keV band is colored green, and the ultra-hard 4.0--8.0 keV band is colored blue. Shanil Virani, Ezequiel Treister, C. Megan Urry, and Eric Gawiser Dept. of Astronomy,Yale University

Journal Papers

• The Extended Chandra Deep Field South Survey: X-ray Point-Source Catalog (AJ, 2006, 131, 2373)
  
• Table 4: Primary X-ray Source Catalog (Probability Threshold=1E-7; ASCII; machine readable) (UPDATED: 28 Aug 2005)
  NOTE: For a probability threshold of 1E-7, 2-3 false sources are expected.
• Table 5: Secondary X-ray Source Catalog (Probability Threshold=1E-6; ASCII; machine readable) (UPDATED: 28 Aug 2005)
  NOTE: For a probability threshold of 1E-6, 20-30 false sources are expected.
• Table 6: Catalog of Wavdetect-collapsed Sources (Probability Threshold=1E-7; ASCII; machine readable)
  NOTE: Catalog of 70 sources for which one of the axes of the wavdetect-determined source ellipse collapsed.




BAND	MERGED EVENT LIST	EXPOSURE-CORRECTED IMAGE	EXPOSURE MAP
FULL	ecdfs_full_merged.fits.gz	ecdfs_full_expcorr.fits.gz	ecdfs-full_expmap.fits.gz
SOFT	ecdfs_soft_merged.fits.gz	ecdfs_soft_expcorr.fits.gz	ecdfs-soft_expmap.fits.gz
HARD	ecdfs_hard_merged.fits.gz	ecdfs_hard_expcorr.fits.gz	ecdfs-hard_expmap.fits.gz

• The Physical Nature of Lyman Alpha Emitting Galaxies at z=3.1
  Gawiser, E., et al., 2006, ApJ, 642, L13.

• Lyman Alpha-Emitting Galaxies at z = 3.1: L* Progenitors Experiencing Rapid Star Formation
  Gawiser, E., et al., 2007, ApJ, 671, 278.

• The UV colours of high-redshift early-type galaxies: evidence for recent star formation and stellar mass assembly over the last 8 billion years
  Kaviraj, S., et al., 2008, MNRAS, 388, 67.

• Clustering of Intermediate-Luminosity X-Ray-Selected Active Galactic Nuclei at z ~ 3
  Francke, H., et al., 2008, ApJ, 673, L13.

• Mid-infrared Properties and Color Selection for X-ray Detected AGN in the MUSYC ECDF-S field
  Cardamone, C., et al., 2008, ApJ, 680, 130.
• Table 1: X-Ray and Infrared Properties of MUSYC ECDF-S X-Ray Sources (ASCII; machine readable)

• Optical Spectroscopy of X-ray Sources in the Extended Chandra Deep Field-South
  Treister, E., Virani, S., et al. 2008, ApJ, submitted.
  
  
• Table 2: X-Ray, Optical, and Mid-IR Properties of the X-Ray Sources in the ECDF-S (ASCII; machine readable)
  NOTE: Table 2 will be available once the paper has been accepted.

Conference Presentations

• The Extended Chandra Deep Field South Survey: Optical Properties of X-ray Detected Sources
  To be published in the proceedings of "The X-ray Universe 2005" conference, San Lorenzo de El Escorial, Madrid, Spain, 26-30 Sept 2005. [poster]
• The Extended Chandra Deep Field South Survey: Optical & NIR Properties of X-ray Detected Sources
  Display paper presented at "Six Years of Science with Chandra" conference, Cambridge, MA, 2-4 Nov 2005. [poster]
• LBG, LAE & AGN at z=3 in MUSYC
  Francke, Gawiser, Virani, Treister, Urry & MUSYC Collaboration, 2005, AAS 207, 8020F
• EXOs and Obscured AGN in the MUSYC Survey
  Urry, Virani, Van Duyne, Treister, Taylor, Gawiser, van Dokkum & MUSYC Collaboration, 2005, AAS 207, 8021U
• Optical Properties of AGN in the ECDFS Field of the MUSYC Survey
  Coppi, Virani, Van Duyne, Urry, Treister, Gawiser, Francke & MUSYC Collaboration, 2005, AAS 207, 8022C
• Near-Infrared Properties of AGN in the MUSYC Survey
  Van Duyne, Urry, Virani, Treister, Taylor, Gawiser, van Dokkum & MUSYC Collaboration, 2005, AAS 207, 8018V
• X-ray Properties of Star-forming Galaxies in the MUSYC Survey
  Richardson, Virani, Gawiser, Urry, Treister, Van Duyne, Miller & MUSYC Collaboration, 2005, AAS 207, 8019R