NASA/IPAC Extragalactic Database

July 2018 Release Highlights

(Latest Revision: 31 July 2018)

Database Contents

Tabular summaries of NED's current holdings are presented here. Graphic summaries are presented here.

References and Object Pointers

• 1,176,297 new object links (pointers) to 3,248 new references
• This release completes the results of cross-matching 471 million 2MASS Point Source Catalog (Skrutskie, M. F. et al. 2006AJ....131.1163S) sources with the contents of NED. Approximately 57 million of the sources (12% of the entire 2MASS PSC) were cross-identified with prior NED objects, and the rest became new objects in the database.. This release includes the fusion of their J, H, K_s photometric data into object SEDs. For further information, please see 2MASS PSC holdings.

Cross-IDs

• 47,276,531 names cross-identified with NED objects from
  
  • 2MASS Point Source Catalog (46,400,816 sources; https://www.ipac.caltech.edu/2mass/releases/allsky/)
  • LEDA database (828,055 sources; http://leda.univ-lyon1.fr/)
  • Harvard Revised (HR) star catalog (8,790 sources; ftp://cdsarc.u-strasbg.fr/cats/V/36B/)
  • Harvard Variable (HV) stars (6,630 sources; 1967lmc..book.....H and 1977smc..book.....H)
  • Cape Photographic Durchmusterung Catalog (6,534 stars south of Declination -78 degrees; ftp://cdsarc.u-strasbg.fr/cats/I/108/)
  • selected Henry Draper (HD) numbers (7,240 stars; ftp://cdsarc.u-strasbg.fr/cats/III/135A/)
  • other common and variable star designations (18,466 sources).

Spectra

• 53 spectra from Decomposing Star Formation and Active Galactic Nucleus with Spitzer Mid-infrared Spectra: Luminosity Functions and Co-evolution (Fu et al. 2010ApJ...722..653F)
• 31 spectra from High molecular gas fractions in normal massive star-forming galaxies in the young Universe (Tacconi et al. 2010Natur.463..781T)
• 51 spectra from The Nuclear Near-Infrared Spectral Properties of Nearby Galaxies (Mason et al 2015ApJS..217...13M)
• 929 spectra from The COSMOS Active Galactic Nucleus Spectroscopic Survey. I. XMM-Newton Counterparts (Trump et al 2009ApJ...696.1195T)

Images

• 64 images from High molecular gas fractions in normal massive star-forming galaxies in the young Universe (Tacconi et al. 2010Natur.463..781T)
• 20 images from V, R, I and H{alpha} photometry of circumnuclear star-forming regions in four galaxies with different levels of nuclear activity (Angeles et al. 2000MNRAS.311..120D)

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

• Obscured Active Galactic Nuclei (Hickox, Ryan C. & Alexander, David M., arXiv:1806.04680)
• The Relation Between Large-Scale Gas Dynamics, Nuclear Kinematics, and Activity (Koribalski, Bärbel, 1996ASPC..106..238K)
• Nuclear Processes in Astrophysics: Recent Progress (Liccardo, V. et al., arXiv:1805.10183)
• The Circumgalactic Medium (Tumlinson, Jason et al., arXiv:1709.09180)
• The Connection Between Galaxies and Their Dark Matter Halos (Wechsler, Risa H. and Tinker, Jeremy L., arXiv:1804.03097)
• The Standard Model of Cosmology: A Skeptic's Guide (Scott, Douglas, arXiv:1804.01318)
• On the Two Main Classes of Active Galactic Nuclei (Padovani, Paolo, arXiv:1707.08069v1)
• Astronomical Distance Determination in the Space Age. Secondary Distance Indicators (Czerny, B. et al., arXiv:1801.00598)
• Dynamics of Secular Evolution (Binney, James, arXiv:1202.3403v1)
• Cool Gas in High Redshift Galaxies (Carilli, C.L. & Walter, F., arXiv:1301.0371)
• Cluster Lenses (Kneib, Jean-Paul & Natarajan, Priyamvada, arXiv:1202.0185)
• Dark Matter in the Milky Way's Dwarf Spheroidal Satellites (Walker, Matthew G., arXiv:1205.0311)
• Distance Measurements and Stellar Population Properties via Surface Brightness Fluctuations (Fritz, Alexander, arXiv:1205.1498)

June 2018 Release - The New Interface of NED

(Latest Revision: 22 Jun 2018)

The NED team is pleased to present a new user interface! The original web interface is being phased out and replaced with a modern, streamlined approach that simplifies and consolidates query forms, and provides interactive tables with linked graphics in the results.

Featured upgrades include:

• A single search box on the main screen lets you easily search for objects by entering an object name, an object name or coordinates with a search radius, or a refcode. Image searches are also supported (click the ? icon by the search box for examples.)
• Information for a single object is presented in a modern, convenient way:
  • A new Overview page summarizes key quantities, as available
  • Detailed data in different categories are organized in tabs
  • Integration of the IPAC Firefly toolkit provides interactive tables (including sorting, filtering, data downloads) and linked graphics
  • FITS images can be viewed in your browser using the IPAC Firefly image viewer (replaces the Aladin Java applet)
  • Documentation has been updated and re-organized (see Information in the main menu bar above)
• Modernized forms for the calculators (under Tools in the menu bar): coordinate transforms, Galactic extinction, and velocity corrections
• References now link to the new ADS interface
• New API to query the NED Object Directory using the VO Table Access Protocol (TAP)

Some familiar NED features are not yet integrated into the new interface: Search Objects by IAU Name, Search Objects by Classifications, Build Data Table from Input List, Search References by Object Name, the Galaxy Environment tool, and Level 5. These will be included in upcoming releases, and meanwhile they remain available in the 'Classic Services' menu option (above). Please refer to the Known Issues page for more information.

We welcome your feedback and comments.