-
The 1.4-GHz VLA image for the Spitzer Space Telescope First-Look Survey
field with 3565 objects from
2003AJ....125.2411C.
-
The 1.4-GHz Westerbork Synthesis Radio Telescope (WSRT) image for the
Spitzer Space Telescope First-Look Survey verification region with
1048 objects from
2004A&A...424..371M.
-
J, H, and K FITS images of the central starburst
regions of 24 objects from
1997AJ....113..162C.
28 April 2005 Revisions
*** NOTICE: On 2 May 2005 the legacy VT-100/X-Windows telnet interface
to NED will be retired. ***
-
220,207 SDSS DR2
and DR3 galaxies and QSOs with redshifts.
-
47,769 objects and redshifts from the July 2003 Release of the 2QZ from
2004MNRAS.349.1397C.
-
2,571 HII Regions within 17 Seyfert Galaxies from
1996ApJS..105...93E.
-
1,927 Galaxies detected by ISO with ISOPHOT at 170microns from
2004A&A...422...39S.
-
1,048 1.4GHz sources in the Spitzer Space Telescope FLSv Region from
2004A&A...424..371M.
-
8,968 Galaxies from the HST ACS Camera from
2004ApJS..150....1B.
-
5,494 Galaxies and Redshifts for the NOAO Fundamental Plane Survey from
2004AJ....128.1558S.
-
4,097 detailed redshifts for 3873 galaxies and 112 clusters of galaxies
from
1982MNRAS.200..621C,
1994MNRAS.267..665B,
1997AJ....113..905P,
1998MNRAS.296..599B,
1998MNRAS.300..417R, and
1999MNRAS.305..259W.
-
840 FITS images for quasars and active galactic nuclei at 2cm from
1998AJ....115.1295K and
2004ApJ...609..539K.
Latest review papers in
LEVEL 5 Knowledgebase for Extragalactic Astronomy and Cosmology
22 April 2005 Revisions
22 December 2004 Revisions
-
NED is now providing Diameter Data
Frames for a
representative but large sampling of nearby galaxies and selected
radio sources. In this initial release, a wide variety of optically
measured diameters and exponential scale lengths are returned and
tabulated for individual objects. The primary sources for these data
are
- UGC: 12,940 diameters, axis ratios, and position angles;
- MCG: 49,359 diameters; including 21,591 "inner" diameters and
27,768 "outer" diameters;
- ESO-B: 16,581 diameters and position angles (if given);
- ESO-LV: 158,778 diameters; including
- 15,120 B-band major axes, axis ratios, and position angles at
D_25;
- 14,870 B-band major axes at D_26;
- 13,879 B-band major axes at D_27;
- 14,937 major axes at 70% of total B light;
- 15,160 major axes at 80% of total B light;
- 15,301 major axes at 90% of total B light;
- 14,073 major axes at 50% of total B light;
- 13,817 diameters of the circular aperture enclosing 50% of total B
light;
- 11,486 B scale lengths for exponential disk fits;
- 15,124 B scale lengths from fits to octants; and
- 15,011 R scale lengths from fits to octants.
Future releases will include isophotal optical diameters from RC3, 2MASS
near-infrared diameters, and additional
radio data. As time permits, the By-Parameter search capability will
be augmented to allow all-sky searches using diameter constraints.
- Improvements in the Near Name, Near Position, IAU Format,
and Advanced All-Sky queries:
- The Object Type constraints have been re-organized into
Classified Extragalactic Objects, Unclassified Extragalactic Candidates,
and Components of Galaxies.
- A "Quick-Pick" button is available to simplify selection of only
Classified Extragalactic Objects.
- Among the Object Type constraints, over 20 categories of
"Components of Galaxies" are now available for object inclusion
or exclusion (query filters). These include supernovae,
HII regions, variable stars, planetary nebulae, supernova remnants,
star clusters, and various types of stars.
- A new "Index of Constraint Types" appears on top of each menu.
- In the By Name query menu, the default value of the
"Extended name search?" option located under the Object name
entry field has been changed to "No". Be sure to select "Yes"
if you want related objects such as components of
galaxy pairs, cluster members, or HII regions and variable
stars located within the named object.
- About 35,000 6dF DR1 galaxies and QSOs with their redshifts from
MNRAS (in press).
- About 2500 HII regions and star clusters in M33 from P. Hodge,
B. Skelton, and J. Ashizawa "An Atlas of Local Group Galaxies",
and various other papers, principally
1974A&A....37...33B and
1987A&A...174...28C.
- 8000 objects from the Northern Sky Optical Cluster Survey (NSC)
2003AJ....125.2064G.
- 8000 Nearby Cluster Galaxies
2004ApJS..153..397B.
- 5000 Isolated Galaxies
2003ApJ...598..260P.
- 3700 Low Surface Brightness Galaxies (LCSB)
2003A&A...405...99M.
- 2000 Galaxies in southern bright star fields (SBSF)
2003A&A...406..593B.
14 June 2004 Revisions
25 March 2004 Revisions
- Through a collaboration with
IRSA
and the
NVO,
FITS images archived in NED can now be queried by
Celestial Coordinates and Areal Coverage.
This is in addition to the original capability to
Search for Images by Object
Name.
- Version 2.0 of
Aladin
from CDS has been configured for visualization and
interaction with images in the NED archive. When the Java
applet is launched (after an image query by object name),
overlay planes include markers for objects in NED,
the USNO A-2.0, 2MASS Point Source, and NVSS catalogs.
- New links to
Cosmology Calculators
and
Extinction Calculators
are available through NED's
Main Menu
(Home Page).
- Some of the current review articles now available through
LEVEL5:
A Knowledgebase for Extragalactic Astronomy and Cosmology
include
- Maps of the Cosmos: The Cosmic Microwave Background
by Lyman A. Page (2004)
- The Evolutionary History of Local Group Irregular Galaxies
by Eva K. Grebel (2004)
- Interstellar Dust by B.T. Draine (2004)
- The Interaction of Radio Sources and X-Ray-Emitting Gas in
Cooling Flows by Elisabeth L. Blanton (2004)
- Astrophysical Origins of Ultrahigh Energy Cosmic Rays
by Diego F. Torres & Luis A. Anchordoqui (2004)
- X-Ray Properties of Groups of Galaxies by John S.
Mulchaey (2000)
- An X-Ray View of Radio Sources by D.A. Schwartz (2004)
- Observational Cosmology by R.H. Sanders (2004)
- Dark Matter: Introduction by Martin J. Rees (2004)
- The Evolution of Tidal Debris by J. Christopher Mihos
(2004)
- TASI Lectures: Introduction to Cosmology by Mark
Trodden & Sean M. Carroll (2004)
- Statistical Challenges in Modern Astronomy by E.D.
Feigelson & G.J. Babu (2004)
- Molecular Gas in Spiral Galaxies by Michele D.
Thornley (2004)
- Dark Matter: Early Considerations by Jaan Einasto
(2004)
- Over 130,000 SDSS galaxies with redshifts
- Over 1000 HII regions in nine nearby galaxies including NGC 4395,
NGC 5194, and NGC 6822.
30 June 2003 Revisions
15 May 2003 Revisions
- 1.6 million 2MASS sources and JHK photometry for them from the
2MASS Extended Source Catalog (XSC)
have been added to NED. About 30,000 XSC sources remain to be tied
to existing NED objects.
- 63,500 COMBO-17 objects (Chandra Deep Field area; see
2001A&A...377..442W).
- 27,000 Las Campanas IR Survey objects (Hubble Deep Field South area; see
2002ApJ...570...54C).
- 9,500 galaxies around damped Lyman{alpha} systems (see
2002AJ....123.2206P).
- 7,500 DEEP Groth Strip objects (see 2002ApJS..142....1S
).
- 6,400 galaxies in distant galaxy clusters (see
2002ApJS..142..153S)
- More than 1,300 photometric data points for radio sources and PG QSO's
(see 1988AJ.....95...26G,
1989ApJ...347...29S,
1989ApJS...69..365S,
2000AJ....120..604S, and
2000A&A...354..453H).
- MSX-SPIRIT III infrared images of
M31,
M33,
M83,
M101,
NGC 253,
NGC 4631,
NGC 4945 and
NGC 5055
(see 2002AJ....124.2990K).
14 January 2003 Revisions
- The APM Galaxy Survey (Maddox et al.MNRAS 243, 692, 1990) has been loaded.
The portion of the survey in NED includes about 3.0 million galaxies in
the southern Galactic
hemisphere with b <~ -40 deg, and Dec <~ +2.5 deg; and about 500,000
galaxies in the northern
Galactic hemisphere between RA ~ 9h 30m to ~14h 30m, and Dec
~ +2.5 deg to ~ -7.5 deg.
- 1.3 million sources from NVSS (Condon et al.AJ 115, 1693, 1998) are loaded.
Work continues on the remaining 500,000 sources from this catalog.
- 55,000 sources from WGACAT (
White, Giommi, and Angelini; 2000)) are loaded; work continues on
this catalog, too.
- 40,000 galaxies and QSOs from the SDSS Early Data Release (Stoughton et al.AJ 123, 485, 2002) have been loaded.
- 37,000 redshifts from the 2df Galaxy Redshift Survey (Folkes et al.MNRAS 308, 459, 1999)
have been loaded.
- More than 5,000 HII regions in 13 large, nearby galaxies have also been
loaded.
- OASIS, an image visualization and manipulation tool, is now available
for use with FITS images. Click on the OASIS logo on an image list
page for more information about using OASIS.
- A new version of ALADIN is also available. Again, click on the ALADIN
logo to use the new version and for more information about the new
features.
23 May 2002 Revisions
- The Advanced All-Sky
(formerly "By Parameter") menu provides new capabilities and improvements:
- You may now select samples from NED based on flux density or
magnitude
limits. Photometrically constrained searches can be performed
with optional joint constraints involving redshift, object types,
survey name prefixes, or sky area. Available passbands ranging
from gamma rays through the radio spectrum are conveniently
labeled with standard names, as well as wavelength and frequency
units.
This powerful new tool makes use of the extensive
multiwavelength coverage of over 4.5 million photometric data points
fused in NED (using original and homogenized physical units)
for hundreds of thousands of extragalactic objects.
- A new Index of Constraint Types near the top of the menu is
available to help
you navigate the various search constrain regions.
- New Tutorial Examples
near the top of the menu will set the options to do various example
searches for you.
You may use these as guides to selecting your own sample from NED,
or you may set the constraints yourself.
- There are [Submit Query] buttons in each section of the menu to
minimize the need for scrolling.
- Preformatted text tables are now the default output for most
searches. These substantially speed up data display for searches
that return large numbers of objects. HTML tables, which are easier to
read but slower to display, are still an option.
- The "Output Format Specifications" section of all object query
menus
contains new options to sort by ascending or descending redshift.
- NED's home page format has been adjusted to a more logical layout,
with "Skyplot" and "Batch Jobs" moved to the "Tools" section.
- Photometric and estimated redshifts are now displayed with
the code PHOT or EST, respectively, in the QUAL column of
the basic data display. This will make such non-spectroscopic
redshifts easier to identify.
- In addition to FITS images, NED is now beginning the process of
scanning, archiving, and displaying JPEG images of radio contour plots
(e.g. 3C 019, 3C 022, 3C 206, etc.) and 21-cm neutral hydrogen line
profiles (e.g. UGC 03468, UGC 03578, etc.) extracted from the
published literature. Many sources remain to be identified and scanned
in, but new plots will appear as time and resources permit.
- We have begun loading WGACAT (White, Giommi, and Angelini 2000),
which was assembled from ROSAT PSPC pointed observations. 5500
sources are currently loaded; the remainder will be loaded over
the summer.
- The Tenth (2001) edition of A Catalogue of Quasars and Active
Nuclei by M.-P. Veron-Cetty and P. Veron has been folded into NED
with unique [VCV2001] names attached to each object.
- The Woudt, Kraan-Korteweg catalog of >8,000 Galaxies Behind the
Southern Milky Way (WKK) has been loaded.
- The ROSAT Bright Sample (RBS) catalog has been incorporated.
20 March 2002 Revisions
- 400,000 new photometric data points
- 46,600 additional 2dFGRS objects and redshifts
- 13,000 pointers to 1980-1984 radio literature from the Compendium of
Extragalactic Radio Continuum Observations (CERCO; Gopal-Krishna
et al., 1986)
- 10,000 pointers to pre-1976 literature from RC1 and RC2
- The Carnegie Atlas of Galaxies (images and notes) is now available
in NED
- Several thousand other new images, HI maps, rotation curves,
spectra, etc.
18 December 2001 Revisions
- 37,000 galaxies with redshifts from the 2dF Galaxy Redshift Survey
- 15,000 QSOs with redshifts from the 2dF QSO Redshift Survey
- 250,000 new photometric measurements
- Catalog and name prefix definitions are now available through hyperlinks
in the query reports.
- Photometric data tables and SEDs have been enhanced:
- Data in published units and homogenized units (Jy vs. Hz) are displayed together by default.
- By default SEDs are plotted using a "Fixed data range", meaning a fixed
minimum and maximum in log (frequency) or log (wavelength) on the X axis and
a fixed range of +/- 7 dex centered around the mid-point of the Y axis values.
This has the advantage of maintaining a consistent slope for comparing SEDs.
The "Autoscale data range" option can be selected to replot an SED inside a viewport
computed using only the data values.
- Error bars and point labels can be toggled on or off.
- The SED plots can be clicked to zoom in at a position of interest (in a separate window).
The zoom factor can be set, and the properties (error bars, point labels,
data range, etc.) are inherited from the main plot.
- Postscript versions of the SEDs (full-range and zoomed plots) can be downloaded.
- In the data table, homogenized values are displayed in the same units as selected
for the SED plot axes:
X = log(Freq. [Hz]) or log(Wave [microns]) versus
Y = log(F_nu [Jy]), log(F_nu [W m^-2 Hz^-1]), log(nu*F_nu [Jy-Hz]) , or log(nu*F_nu [W m^-2])
- External Links to the SDSS, UZC, FCSS, and ATNF archives are provided as follows:
- SDSS (spectra and catalog) and UZC (spectra) archive links appear when the object
has a relevant source name (cross-ID).
Examples:
NGC 3720,
NGC 1055, and
NGC 1087
- FCSS spectral archive links appear when the object has an FCSS name (cross-ID).
Examples:
NGC 1392 and
FCC 223
- A link to query the ATNF observation log appears for objects with DEC < +20 degrees.
Examples with ATNF entries:
NGC 1068 and
AM 1925-724 (SUPER-ANTENA).
- External Links to NVSS, MAST and others have been updated to reflect URL changes at
the archive centers
- X-ray images from the first eight ROSAT CDs are available
- Selected non-FITS images and scanned maps are now available in NED's image archive.
Examples include images scanned from Arp's
Atlas of Peculiar Galaxies. (Click
here to retrieve a list of all Arp objects from NED.)
24 September 2001 Revisions
- 40,000 galaxies with redshifts from the Sloan Digital Sky Survey
- 4,000 galaxies from the Fornax Cluster Spectroscopic Survey
- 1,200 DENIS galaxies near the Galactic plane
- 400,000 photometric measurements
- 120,000 FITS images
- 43,000 redshifts
Catalogs in progress:
- NVSS (~300,000 out of 1,800,000 sources)
- APMUKS (2,310,000 out of 3,560,000 galaxies)
1 June 2001 Revisions
- More than 520,000 extended sources -- with images -- from the
2MASS
2nd Incremental Release
- More than 60,000 images for extended sources from the
2MASS
1st Incremental Release
- ~18,000 WENSS 325MHz Survey sources
- ~15,000 2QZ (2df QSO Redshift survey) sources
- Updated information for the North and South Hubble Deep Fields
- More than 200,000 references to NED objects from over 2,000 new
papers
12 October 2000 Revisions
NED cited by Nature
as a top ranked database for online astronomy research (October 2000).
- ALADIN IMAGE DISPLAY AND SOURCE OVERLAY TOOL:
Results of queries to NED's image archive now include icons like this
, which when clicked
launch the Aladin Java applet using the specified FITS image.
An example illustrating these links is this retrieval of
FITS images
available for NGC 7469.
This tool allows you to superimpose entries from NED, the USNO catalog
and various other astronomical catalogs, and to interactively access related
data and information for all known objects in the field.
You can also measure interactively positions and distances in celestial coordinates.
Unlike other programs of this nature, Aladin is a Java applet that requires
no download or special installation steps on your computer, just a current
Web browser version that supports Java applets.
The driving motivation behind Aladin is to provide a visual
summary of the multi-wavelength sky. Aladin was developed by
François Bonnarel and Pierre Fernique and is configured with the NED interface
through a cooperative agreement between NED and the CDS.
More information about Aladin
is available at the CDS.
- Associations:New extragalactic sources and data for previously known sources are
becoming available at an ever increasing rate and in larger numbers than
ever before. In an effort to make large numbers of sources from new large-scale
sky surveys accessible as soon as possible, NED now includes
objects in complex regions where secure cross-identifications
with objects already in NED have not yet been fully established. These relations are
referred to as Associations, to distinguish them from the majority of
relations in NED that have secure cross-identifications.
Links to association information, when available, are listed
in the Assoc column and in the links located next to the DSS image
cutout in the Essential Data reports. An example with links leading to association data is provided with this
By Name search on
APMUKS(BJ) B003425.77-334949.0; these association data can also be viewed directly
here.
The information includes separations, position angles, and
goodness-of-fit parameters from the process of correlating the positional uncertainty
ellipses of the new object with those of nearby objects already in NED.
More information is available in the
Association Search Results Help.
- Improved links to objects referenced in papers:
Abstract pages include links (top and bottom) to search the database for all objects referenced
in the paper; these links now indicate the number of objects involved. An example abstract is
here,
where you can Retrieve 173 NED objects in this paper.
- Improved alignment of pre-formatted text used in the HTML
reports from queries containing large result sets.
18 April 2000 Revisions
Welcome to the NASA/IPAC Extragalactic Database (NED).
This is the tenth release of NED's World Wide Web-based interface.
Changes since the previous release:
Search results now include convenient links to several other on-line image,
catalog, and observing log services. Available resources include
- Mission archives at
- IRSA (2MASS, IRAS, MSX),
- MAST (HST, IUE, EUVE, etc.),
- HEASARC (HEAO, GINGA, EXOSAT, EINSTEIN, XTE, ROSAT, etc.),
- Object and catalog data at CDS (SIMBAD and VizieR),
- As well as IMPrESS (GSFC, ADF/ADC),
- NVSS and FIRST (NRAO),
- The VLA Observation Log,
- Astrobrowse (HEASARC)
and several other services. For more information, see