What's New with NED

Welcome to the NASA/IPAC Extragalactic Database (NED)

April 2012 Release

Interface Enhancements

• Notice of Discontinuing Services: Server Mode (nedsrv) to be replaced in 2012 with web services.

Known Issues

• The flux densities computed by NED from the SDSS asinh magnitudes are incorrect at magnitudes within 2.5 mag of the sky noise limit due to a bug in the application of the softening parameters (all 5 bands). In addition, the zero-point magnitude corrections were incorrectly applied in the derived flux densities computed by NED from the SDSS u and z band magnitudes. The flux densities (and uncertainties) are being recomputed and are scheduled to appear in the next NED release (June 2012). In the mean time, the recommended fix is for users to recalculate the SDSS fluxes from the asinh magnitudes as explained here.

Database Contents

• 1,009,472 Unique Objects (total: 170.5 million unique objects)
• 1,294,165 Objects Linked to 858 References (total: 10.8 million objects linked to 81,248 references)
• 1,660,624 Multiwavelength Cross-Identifications between Objects (total: 182.2 million cross-IDs)
• 494,744 Photometric Measurements (total: 1.72 billion photometric measurements)
• Redshifts for 242,201 Objects (total: 3.99 million objects with at least one redshift measurement)
• 1,143 detailed Object Notes (total: 69,510 notes)
• 342,084 Object Associations (total: 1,398,549 associations)
• 127,114 Spectra (total: 465,717 spectra)
• 849 Publication Abstracts (total: 58,234 abstracts)

Highlights include:

• Over 490,000 Spitzer IRAC sources from 2010ApJ...716..530K
• Over 430,000 COSMOS optical and near-IR sources from 2007ApJS..172...99C
• Over 210,000 SUMSS radio sources and photometry from the March 2008 public release v2.1
• Over 180,000 2XMM x-ray sources from the April 2010 public release v1.2
• Over 100,000 1RXS ROSAT x-ray sources from 2000IAUC.7432B...1V
• Over 80,000 WiggleZ-DR1 sources with redshifts from 2010MNRAS.401.1429D
• Over 58,000 sources in the Coma Cluster from 2006A&A...451.1159A
• Over 41,000 COSMOS sources with photometric redshifts from 2009ApJ...701..787P
• Over 5,900 Australian Telescope 20GHz (AT20G) radio sources from 2010MNRAS.402.2403M
• Over 1,450 1FGL gamma-ray sources from 2010ApJS..188..405A and 2010ApJ...715..429A

Latest review papers in LEVEL 5 Knowledgebase for Extragalactic Astronomy and Cosmology

• GALAXY MORPHOLOGY - Ronald J. Buta (2011)
• A REVIEW OF ELLIPTICAL AND DISC GALAXY STRUCTURE, AND MODERN SCALING LAWS - Alister W. Graham (2011)
• GIANT MOLECULAR CLOUDS IN LOCAL GROUP GALAXIES - Leo Blitz et al. (2007)
• TIDES IN COLLIDING GALAXIES - Pierre-Alain Duc and Florent Renaud (2011)
• SIMULATING GALAXY CLUSTERS - Michael L. Norman (2010)

Highlights of Recent Additions to Photometry

• UV : 110 sources with Baade Ly{alpha} line fluxes from 2009ApJ...706..762W
• Visual : 1458 sources with Keck u magnitudes from 2009ApJ...703.2033R
• IR : 1375 sources with Spitzer 3.6 and 24 micron fluxes from 2009ApJ...703.1778S
• MM : 85 sources with IRAM PdBI 1.3, 2 and 3 mm fluxes from 2010A&A...515A..40T
• Radio : 5888 sources with ATCA 20, 8 and 5 GHz fluxes from 2010MNRAS.402.2403M
• Xray : 300 sources with Chandra 0.5-7 keV flux from 2009ApJ...706..810P

Latest Spectra in NED

• 127,114 spectra for 110,256 objects from The 6dF Galaxy Survey (DR3) D. Jones et al (2003).

NOTE: If you would like to have your FITS image or spectral data become available for use by other researchers via NED, please leave a comment with your name and email address so that we may contact you.

The Introduction to NED has more details about all of NED's services, and NED's Features gives a brief overview of NED.

The NED History page has previous NED news.