What's New with NED

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(Latest Revision: 20 July 2017)

Welcome to the NASA/IPAC Extragalactic Database (NED)


June-July 2017 Release Highlights

Notice

Some objects that were assigned a SDSS-DR13 spectroscopic redshift as the highest-ranked ("preferred") value in the 2017 June NED release were later found to be inconsistent with previously established redshifts in NED. In the July 20 NED update, the preferred redshift for such objects have been returned to the values assigned prior to June 28, 2017. If you used redshifts or information derived from redshifts between June 29 and July 20, 2017, we encourage you to access NED again for the latest updates. We apologize for any inconvenience.

It is important to note that as the volume, rate, and complexity of data flowing into NED grow, the team is continuously refining and vetting the results of rule-based algorithms that assign ranks and select "preferred" values of fundamental measurements such as the positions and redshifts that appear by default in object search results. Therefore, the highest ranked values will continue to change over time as new data are merged into the database and ranking criteria become more sophisticated via scientific vetting. Also, we encourage users interested in comparing the uncertainties, measurement methods and other metadata, or investigating potential physical differences among the individual measurements available from various survey catalogs and publications, to inspect the detailed data frames available in NED.

Database Contents

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

Redshifts

Photometry

3,231 new photometric data points integrated into SEDs, including:
  • RADIO : VLA fluxes from X-ray emission from star-forming galaxies - III. Calibration of the LX-SFR relation up to redshift z ~ 1.3 (Mineo, S. et al. 2014MNRAS.437.1698M)
  • VIS : VLT magnitudes from On the connection between the intergalactic medium and galaxies: the H I-galaxy cross-correlation at z <~ 1 (Tejos, Nicolas et al. 2014MNRAS.437.2017T)
  • XRAY : Chandra fluxes from First X-ray observations of low-power compact steep spectrum sources (Kunert-Bajraszewska, M. et al. 2014MNRAS.437.3063K)

Images

  • 44 images from Powerful Activity in the Bright Ages. I. A Visible/IR Survey of High Redshift 3C Radio Galaxies and Quasars (Hilbert et al. 2016ApJS..225...12H)

Spectra

  • 81,001 spectra from The WiggleZ Dark Energy Survey: survey design and first data release (Drinkwater et al. 2010MNRAS.401.1429D)
  • 64 spectra from Optical Spectra of a Complete Sample of Radio Sources. I. The Spectra (Lawrence et al. 1996ApJS..107..541L)

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


May 2017 Release Highlights

Database Contents

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

References and Object Pointers

  • Over 650,000 new objects with spectroscopic redshifts from the SDSS DR13 Optical Spectra Catalog ( 2016SDSSD.C...0000: ); see also http://www.sdss.org/dr13/spectro/ .
  • 354,866 new object links (pointers) to 854 new references including:
  •     327,106 WINGS sources from OmegaWINGS: OmegaCAM-VST observations of WINGS galaxy clusters (Gullieuszik, M. et al. 2015A&A...581A..41G )

Cross-IDs


March 2017 Release Highlights

Database Contents

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

New Interface

Progress and status of our next generation interface are posted here.

References and Object Pointers

2,211,822 new object links (pointers) to 1,562 new references including:
  • 137,796 Infrared sources (S-CANDELS) from S-CANDELS: The Spitzer-Cosmic Assembly Near-Infrared Deep Extragalactic Survey. Survey Design, Photometry, and Deep IRAC Source Counts (Ashby, M.L.N. et al. 2015ApJS..218...33A )
  • 59,192 Radio sources from the Nature and evolution of powerful radio galaxies at z ~ 1 and their link with the quasar luminosity function (van Velzen, S. et al. 2015MNRAS.446.2985V )
  • 23,347 Swift AGNs (SACS) and clusters of galaxies (SWCL) from The SWIFT AGN and Cluster Survey. (Dai, X. et al. 2015ApJS..218....8D )
  • 581,945 galaxies from The connection between galaxy structure and quenching efficiency (Omand, C. et al. 2014MNRAS.440..843O )
  • 184,834 quasars from The second release of the Large Quasar Astrometric Catalog (LQAC-2) (Souchay, J. et al. 2012A&A...537A..99S )
  • 18,093 Star clusters from A comprehensive HST BVI catalogue of star clusters in five Hickson compact groups of galaxies (Fedotov, K. et al. 2015MNRAS.449.2937F )

Cross-IDs and New Objects

  • 351,184 sources from the literature cross-identified with NED objects
  • 138,219 new NED objects

Redshifts

  • 186,940 additional redshifts
  • 7,496 more objects with redshifts

Photometry

19,668 new photometric data points integrated into SEDs, including:
  • XRAY : 0.3-10 keV fluxes from An Environmental Study of the Ultraluminous X-Ray Source Population in Early-type Galaxies (Plotkin, Richard. M. et al. 2014ApJ...780....6P)
  • VIS and NIR : HST, VLT, and Spitzer fluxes from Tracing the Mass Growth and Star Formation Rate Evolution of Massive Galaxies from z ~ 6 to z ~ 1 in the Hubble Ultra-Deep Field (Lundgren, Britt F. et al. 2014ApJ...780...34L)
  • SUBMM : Herschel fluxes from HerMES: Candidate High-redshift Galaxies Discovered with Herschel/SPIRE (Dowell, C. Darren et al. 2014ApJ...780...75D)

Images

  • 90 images from Maps of the Magellanic Clouds from Combined South Pole Telescope and PLANCK Data (Crawford et al. 2016ApJS..227...23C)
  • 14 images from On the Classification of UGC 1382 as a Giant Low Surface Brightness Galaxy (Hagen et al. 2016ApJ...826..210H)
  • 214 images from The SAMI Galaxy Survey: Early Data Release (Allen et al. 2015MNRAS.446.1567A)
  • 65 images from Investigations of dust heating in M81, M83 and NGC 2403 with the Herschel Space Observatory (Bendo et al. 2012MNRAS.419.1833B)

Spectra

  • 4041 spectra from Update on H I data collection from Green Bank, Parkes and Arecibo telescopes for the Cosmic Flows project (Courtois and Brent. 2015MNRAS.447.1531C)
  • 366 spectra from COLD GASS, an IRAM legacy survey of molecular gas in massive galaxies - I. Relations between H_2_, H I, stellar content and structural properties (Saintonge et al. 2011MNRAS.415...32S)
  • 6 spectra from 3-5 micron Spectroscopy of Obscured AGNs in ULIRGs (Sani et al. 2008ApJ...675...96S)

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


December 2016 Release Highlights

Database Contents

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

New Interface

Progress and status of our next generation interface are posted here.

References and Object Pointers

1,066,699 new object links (pointers) to 508 new references including:
  • 854,328 galaxies from Stellar Masses and Star Formation Rates for 1M Galaxies from SDSS+WISE (Chang, Yu-Yen et al. 2015ApJS..219....8C )
  • 100,112 quasars from The large quasar reference frame (LQRF) (Andrei, A. H . et al. 2009A&A...505..385A )
  • 108,467 quasars from The construction of the large quasar astrometric catalogue (LQAC) (Souchay, J. et al. 2009A&A...494..799S )
  • 2,191 quasars from Auxilliary Quasar Solution for the QSOs that were matched to ICRF2 sources in Gaia DR1 (Gaia Collaboration 2016yCat.1337....0G )

Redshift-Independent Distances

Photometry

6,160 new photometric data points including:
  • RADIO : 1.4 GHz fluxes from mJIVE-20: A Survey for Compact mJy Radio Objects with the Very Long Baseline Array (Deller, A.T. and Middelberg, E. 2014AJ....147...14D)
  • VIS : KPNO magnitudes from Beyond the Brim of the Hat: Kinematics of Globular Clusters out to Large Radii in the Sombrero Galaxy (Dowell, Jessica L. et al. 2014AJ....147..150D)
  • NIR : Magnitudes from New 2MASS Near-infrared Photometry for Globular Clusters in M31 (Wang, Song et al. 2014AJ....148....4W)

Images

  • 20 images from The resolved star-formation relation in nearby active galactic nuclei (Casasola et al. 2015A&A...577A.135C)

Spectra

  • 469 spectra from A Uniform Analysis of the Ly{alpha} Forest at z = 0-5. III. Hubble Space Telescope Faint Object Spectrograph Spectral Atlas (Bechtold et al. 2002ApJS..140..143B)
  • 39 spectra from A Uniform Analysis of the Ly{alpha} Forest at z = 0-5. I. The Sample and Distribution of Clouds at z > 1.7 (Scott et al. 2000ApJS..130...37S)
  • 6 spectra from Simulation Analysis of Lyman-alpha forest spectra. I Empirical description at z ~ (Dobrzycki and Bechtold 1996ApJ...457..102D)
  • 33 spectra from The Lyman-alpha forest near 34 Quasi-Stellar objects with z > 2.6 (Jill Bechtold 1994ApJS...91....1B)

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


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.

Return to NED's Home Page.