Welcome to the NASA/IPAC Extragalactic Database (NED)
September 2014 Release
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|
|Publication Abstracts ||67,750|
|Object Links to References ||31,677,765|
|Photometric Data Points ||1,969,546,956|
|Objects with Redshifts ||5,178,967|
|Redshift-Independent Distances ||77,368|
|Objects with Redshift-Independent Distances||16,370|
|Objects with Detailed Classifications||229,792|
|Detailed Object Notes ||75,130|
August 2014 Release
111 new Supernovae published through May 2014 (CBAT)
126 new Gamma-ray Bursts discovered through June 2014
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
(Husemann, B. et al.
1738 images from
MOJAVE. X. Parsec-scale Jet Orientation Variations and Superluminal
in Active Galactic Nuclei
(Lister, M. L. et al.
129 spectra from
An Atlas of Galaxy Spectral Energy Distributions from the Ultraviolet
to the Mid-infrared
(Brown et al.
30 spectra from
High-resolution, high signal-to-noise, global H I spectra of southern,
extreme late-type spiral galaxies
(Mathews et al.
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.
64 spectra from
H I observations of southern extreme late-type galaxies. I. An
optically faint sample
(Gallagher et al.
34 spectra from
Spiral galaxies in clusters. II - Neutral hydrogen observations in
Cancer, Hercules /A 2151/, and Pegasus I
(Schommer et al.
18 spectra from
A neutral hydrogen study of early-type galaxies in and near the Virgo
(Krumm, N. and Salpeter, E.
4 spectra from
Improved Limits on Intergalactic Intracluster HI in the Coma Cluster
(Tarter, J. C., Wright, M. C. H.
3 spectra from
The HI Content of the Elliptical alaxies NGC 2974, NGC 4105 and NGC
(Bottinelli, L., Gouguenheim, L.
1 spectrum from
Neutral Hydrogen Observations of the Edge-On Disk Galaxy NGC 891
(Sancisi, R., Allen, R. J.
1 spectrum from
Extended Rotation Curves of High-Luminosity Spiral Galaxies. III. The
Spiral Galaxy NGC 7217
(Peterson et al.
4 spectra from
HI-Deficient Spiral Galaxies in the Coma Cluster and Abell 1367
(Sullivan, W. T. III, Johnson, P. E.
2 spectra from
Neutral Hydrogen Absorption within the Radio Galaxy 3C 178
(Haschicka, D. at el.
1 spectrum from
The Velocity Field of the Barred Spiral Galaxy NGC 5383
(Peterson, C. J. et al.
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.
Cosmic Star Formation History (Piero Madau & Mark Dickinson, 2014arXiv:1403.0007M)
The Evolution of Galaxy Structure Over Cosmic Time (Christopher J. Conselice, 2014arXiv1403.2783C)
Galaxy Morphology (Ronald J. Buta, 2013arXiv:1304.3529B)
Dark Energy: A Short Review (Michael J. Mortonson, David H. Weinberg & Martin White, 2014arXiv1401.0046M)
Structure and Evolution of Dwarf Galaxies (John Kormendy, 2014arXiv1405.1421K)
Micro-arcsecond Radio Astrometry (M.J. Reid & M. Honma, 2013arXiv1312.2871R)
Far-Infrared Surveys of Galaxy Evolution (D. Lutz, 2014arXiv:1403.3334L)
Counter-rotation in Disk Galaxies (E. M. Corsini, 2014arXiv:1403.1263C)
Observational Probes of Cosmic Acceleration (David H. Weinberg et al., 2012arXiv:1201.2434W)
The Planck Mission (Francois R. Bouchet, on behalf of the Planck collaboration, 2014arXiv1405.0439B)
The Epoch of Reionization (Saleem Zaroubi, 2012arXiv:1206.0267Z)
Ultra High Energy Cosmic Rays: A Short Review (Roberto Aloisio, 2012arXiv1211.2004A)
New User Interface and New Approach for Data Integration
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
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.
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.