What's New with NED

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(Latest Revision: 22 September 2014)

Welcome to the NASA/IPAC Extragalactic Database (NED)

September 2014 Release

Database Contents

The following table gives NED's current total holdings:

    Data Type Total
    Sources from Very Large Catalogs 470,992,971
    Distinct Objects with Cross-IDs 214,695,755
    Multiwavelength Cross-IDs 254,658,168
    Object Associations 1,413,595
    References 92,811
    Publication Abstracts 67,750
    Object Links to References 31,677,765
    Photometric Data Points 1,969,546,956
    Diameters 608,833,152
    Objects with Redshifts 5,178,967
    Redshift-Independent Distances 77,368
    Objects with Redshift-Independent Distances16,370
    Objects with Detailed Classifications229,792
    Detailed Object Notes 75,130
    Images 2,610,878
    Spectra 554,151

August 2014 Release

  • 111 new Supernovae published through May 2014 (CBAT)
  • 126 new Gamma-ray Bursts discovered through June 2014

Latest Images

  • 200 optical data cubes and 100 V-band images with H-alpha contours from CALIFA, the Calar Alto Legacy Integral Field Area survey. II. First public data release (Husemann, B. et al. 2013A&A...549A..87H)
  • 1738 images from MOJAVE. X. Parsec-scale Jet Orientation Variations and Superluminal Motion in Active Galactic Nuclei (Lister, M. L. et al. 2013AJ....146..120L)

Latest Spectra

  • 129 spectra from An Atlas of Galaxy Spectral Energy Distributions from the Ultraviolet to the Mid-infrared (Brown et al. 2014ApJS..212...18B)
  • 30 spectra from High-resolution, high signal-to-noise, global H I spectra of southern, extreme late-type spiral galaxies (Mathews et al. 1998AJ....116.1169M)
  • 29 spectra from H I observations of southern extreme late-type galaxies. II. Small angular size galaxies and galaxies near the galactic plane (Mathews et al. 1995AJ....110..581M)
  • 64 spectra from H I observations of southern extreme late-type galaxies. I. An optically faint sample (Gallagher et al. 1995AJ....109.2003G)
  • 34 spectra from Spiral galaxies in clusters. II - Neutral hydrogen observations in Cancer, Hercules /A 2151/, and Pegasus I (Schommer et al. 1981AJ.....86..943S)
  • 18 spectra from A neutral hydrogen study of early-type galaxies in and near the Virgo cluster (Krumm, N. and Salpeter, E. 1979ApJ...227..776K)
  • 4 spectra from Improved Limits on Intergalactic Intracluster HI in the Coma Cluster (Tarter, J. C., Wright, M. C. H. 1979A&A....76..127T)
  • 3 spectra from The HI Content of the Elliptical alaxies NGC 2974, NGC 4105 and NGC 5846 (Bottinelli, L., Gouguenheim, L. 1979A&A....74..172B)
  • 1 spectrum from Neutral Hydrogen Observations of the Edge-On Disk Galaxy NGC 891 (Sancisi, R., Allen, R. J. 1979A&A....74...73S)
  • 1 spectrum from Extended Rotation Curves of High-Luminosity Spiral Galaxies. III. The Spiral Galaxy NGC 7217 (Peterson et al. 1978ApJ...226..770P)
  • 4 spectra from HI-Deficient Spiral Galaxies in the Coma Cluster and Abell 1367 (Sullivan, W. T. III, Johnson, P. E. 1978ApJ...225..751S)
  • 2 spectra from Neutral Hydrogen Absorption within the Radio Galaxy 3C 178 (Haschicka, D. at el. 1978ApJ...225..343H)
  • 1 spectrum from The Velocity Field of the Barred Spiral Galaxy NGC 5383 (Peterson, C. J. et al. 1978ApJ...219...31P)

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.

Latest Review Papers in LEVEL 5 Knowledgebase for Extragalactic Astronomy and Cosmology

New User Interface and New Approach for Data Integration

New User Interface

The NED user interface has begun a transition to a new, more modern style. This new interface may be previewed here. Drop down menus may be used to quickly access searches for objects, data, or literature. Clicking one of these options will lead to the classic, familiar search forms for services that have not yet adopted the new style. The most popular By Name search may be typed directly into a prominently featured query box. Search Objects, With Unprocessed Catalog Sources leads to a new-style interface which gives information on objects in NED and sources from very large catalogs (VLCs) that NED knows about but have not yet been fully integrated into NED (see below). Source Nomenclature leads to a new-style service for looking up source acronyms.

New Approach for Very Large Catalogs

NED has implemented a new methodology for integrating data from very large catalogs (VLCs) containing tens or hundreds of millions of sources. There is a new user interface to Search Objects, With Unprocessed Catalog Sources, with an option to include incoming catalog sources that have not yet been cross-identified and had their key parameters fused with other information in NED. The current release provides access to 471 million catalog sources from the 2MASS Point Source Catalog (2MASS PSC) and 22 million catalog sources from the GALEX Medium Imaging Survey Catalog (GMSC). Nearly 40 million catalog sources from the GALEX All Sky Survey Catalog (GASC) have already been cross-identified with NED objects or promoted to new NED objects.

In the past, cross-identifications between incoming catalog sources and objects in NED were integrated incrementally over many months as the results from cross-matching software were vetted and loaded into the database in chunks spanning across multiple NED updates. This had the disadvantage that only a fraction of catalog sources were accessible in NED until the catalogs were fully processed, and it was not clear exactly what subsets were in NED at any given time. In the new approach, selected parameters (columns) for all catalog sources (rows) in a VLC are rapidly loaded into a new Catalog Source Representation layer of the database and made available for optional inclusion in search results along with the fully integrated NED objects. A detailed discussion of the ontology of unprocessed catalog sources (Status=S) versus NED objects (Status=O) may be found here.

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.

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