Information on Service 'OpenNGC'

Further access options are discussed below

OpenNGC is a database containing positions and main data of NGC (New General Catalogue) and IC (Index Catalogue) objects. It has been built by merging data from NED, HyperLEDA, SIMBAD, and several databases available at HEASARC. In this VO publication, we have changed most of the column names, mostly to make them work as ADQL column names without resorting to delimited identifiers. The mapping should be obvious.

For a list of all services and tables belonging to this service's resource, see Information on resource 'OpenNGC'

Overview

You can access this service using:

form -- an interface for web browsers through an HTML form
scs.xml -- a standard SCS interface as defined by the IVOA to access catalog-type data; SCS clients use http://dc.zah.uni-heidelberg.de/openngc/q/web/scs.xml? to access the service

This service is published as follows:

Within the set(s) ivo_managed with the renderer dali
Within the set(s) local,ivo_managed with the renderer form
Within the set(s) ivo_managed with the renderer scs.xml

local means it is listed on our front page, ivo_managed means it has a record in the VO registry.

Spatial Coverage

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

Name	Table Head	Description	Unit	UCD
comname	Common	Common name(s) of the object.	N/A	N/A
DEC	Delta (ICRS)	Declination (ICRS decimal)	deg	pos.eq.dec
hscs_pos	Position/Name	Coordinates (as h m s, d m s or decimal degrees), or SIMBAD-resolvable object	N/A	N/A
hscs_sr	Search radius	Search radius in arcminutes	N/A	N/A
hubble_type	Hubble	Morphological Hubble type for galaxies.	N/A	src.morph.type
mag_b	m_B	Apparent total magnitude in the B Band.	mag	phot.mag;em.opt.B
mag_k	m_K	Apparent total magnitude in the K Band.	mag	phot.mag;em.ir.K
mag_v	m_V	Apparent total magnitude in the V Band.	mag	phot.mag;em.opt.V
maxrec	Match limit	Maximum number of records returned. Pass 0 to retrieve service parameters.	N/A	N/A
name	Name	Object identifier, either from NGC or from IC.	N/A	meta.id;meta.main
obj_type	Type	Object Type. See note for terms and symbols used.	N/A	src.class
RA	Alpha (ICRS)	Right Ascension (ICRS decimal)	deg	pos.eq.ra
responseformat	Output Format	File format requested for output.	N/A	meta.code.mime
SR	Search Radius	Search radius	deg	N/A
verb	Verbosity	Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns.	N/A	N/A

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

Name	Table Head	Description	Unit	UCD
_r	Dist.	Distance to cone center	deg	pos.distance
comname	Common	Common name(s) of the object.	N/A	N/A
constellation	Const.	Constellation the object is located in.	N/A	meta.id.parent
cstar_id	C* name	Identifier of the central star for planetary nebulae.	N/A	meta.id.cross
cstar_mag_b	* m_B	For planetary nebulae: Apparent magnitude of the central star in the B Band.	mag	phot.mag;em.opt.B
cstar_mag_u	* m_U	For planetary nebulae: Apparent magnitude of the central star in the U Band.	mag	phot.mag;em.opt.U
cstar_mag_v	* m_V	For planetary nebulae: Apparent magnitude of the central star in the V Band.	mag	phot.mag;em.opt.V
dej2000	Dec J2000	Declination in ICRS for Epoch J2000.0.	deg	pos.eq.dec;meta.main
hubble_type	Hubble	Morphological Hubble type for galaxies.	N/A	src.morph.type
ic_cross	IC	Other IC number for this object in case it was duplicated in IC or NCG.	N/A	meta.id.cross
mag_b	m_B	Apparent total magnitude in the B Band.	mag	phot.mag;em.opt.B
mag_h	m_H	Apparent total magnitude in the H Band.	mag	phot.mag;em.ir.H
mag_j	m_J	Apparent total magnitude in the J Band.	mag	phot.mag;em.ir.J
mag_k	m_K	Apparent total magnitude in the K Band.	mag	phot.mag;em.ir.K
mag_v	m_V	Apparent total magnitude in the V Band.	mag	phot.mag;em.opt.V
maj_ax_deg	Maj. Ax.	Major axis of covering ellipsoid.	deg	phys.angSize.sMajAxis
messier_nr	Messier	Messier number for this object	N/A	meta.id.cross
min_ax_deg	Min. Ax.	Minor axis of covering ellipsoid.	deg	phys.angSize.sMinAxis
name	Name	Object identifier, either from NGC or from IC.	N/A	meta.id;meta.main
ned_notes	NED note	Notes about the object exported from NED	N/A	meta.note
notes	Notes	Notes about the object from OpenNGC	N/A	meta.note
obj_type	Type	Object Type. See note for terms and symbols used. Note t	N/A	src.class
other_id	ID	Cross reference to other catalogs.	N/A	meta.id.cross
other_ngc	Alt. NGC	Other NGC number for this object in case it was duplicated in IC or NCG.	N/A	meta.id.cross
pmdec	PM Dec	Proper motion in Declination	mas/yr	pos.pm;pos.eq.dec
pmra	PM RA	Proper motion in RA	mas/yr	pos.pm;pos.eq.ra
pos_ang	Pos. Ang.	Position angle of covering ellipsoid, north over east.	deg	pos.posAng
raj2000	RA J2000	Right Ascension in ICRS for Epoch J2000.0.	deg	pos.eq.ra;meta.main
rv	RV	Heliocentric radial velocity	km/s	spect.dopplerVeloc
sources	Sources	Sources of the various categories of data Note s	N/A	meta.bib
surf_br_B	Surf. Br.	Mean surface brigthness within the 25 mag isophote (B-band); only given for galaxies	mag/arcsec**2	phot.mag.sb
z	z	Heliocentric redshift	N/A	src.redshift

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

Name	Table Head	Description	Unit	UCD	Verb. Level
name	Name	Object identifier, either from NGC or from IC.	N/A	meta.id;meta.main	1
obj_type	Type	Object Type. See note for terms and symbols used. Note t	N/A	src.class	1
raj2000	RA J2000	Right Ascension in ICRS for Epoch J2000.0.	deg	pos.eq.ra;meta.main	1
dej2000	Dec J2000	Declination in ICRS for Epoch J2000.0.	deg	pos.eq.dec;meta.main	1
_r	Dist.	Distance to cone center	deg	pos.distance	10
constellation	Const.	Constellation the object is located in.	N/A	meta.id.parent	15
maj_ax_deg	Maj. Ax.	Major axis of covering ellipsoid.	deg	phys.angSize.sMajAxis	15
min_ax_deg	Min. Ax.	Minor axis of covering ellipsoid.	deg	phys.angSize.sMinAxis	15
pos_ang	Pos. Ang.	Position angle of covering ellipsoid, north over east.	deg	pos.posAng	15
mag_b	m_B	Apparent total magnitude in the B Band.	mag	phot.mag;em.opt.B	15
mag_v	m_V	Apparent total magnitude in the V Band.	mag	phot.mag;em.opt.V	15
mag_j	m_J	Apparent total magnitude in the J Band.	mag	phot.mag;em.ir.J	15
mag_h	m_H	Apparent total magnitude in the H Band.	mag	phot.mag;em.ir.H	15
mag_k	m_K	Apparent total magnitude in the K Band.	mag	phot.mag;em.ir.K	15
surf_br_B	Surf. Br.	Mean surface brigthness within the 25 mag isophote (B-band); only given for galaxies	mag/arcsec**2	phot.mag.sb	15
hubble_type	Hubble	Morphological Hubble type for galaxies.	N/A	src.morph.type	15
pmra	PM RA	Proper motion in RA	mas/yr	pos.pm;pos.eq.ra	15
pmdec	PM Dec	Proper motion in Declination	mas/yr	pos.pm;pos.eq.dec	15
rv	RV	Heliocentric radial velocity	km/s	spect.dopplerVeloc	15
z	z	Heliocentric redshift	N/A	src.redshift	15
cstar_mag_u	* m_U	For planetary nebulae: Apparent magnitude of the central star in the U Band.	mag	phot.mag;em.opt.U	15
cstar_mag_b	* m_B	For planetary nebulae: Apparent magnitude of the central star in the B Band.	mag	phot.mag;em.opt.B	15
cstar_mag_v	* m_V	For planetary nebulae: Apparent magnitude of the central star in the V Band.	mag	phot.mag;em.opt.V	15
messier_nr	Messier	Messier number for this object	N/A	meta.id.cross	15
other_ngc	Alt. NGC	Other NGC number for this object in case it was duplicated in IC or NCG.	N/A	meta.id.cross	15
ic_cross	IC	Other IC number for this object in case it was duplicated in IC or NCG.	N/A	meta.id.cross	15
cstar_id	C* name	Identifier of the central star for planetary nebulae.	N/A	meta.id.cross	15
other_id	ID	Cross reference to other catalogs.	N/A	meta.id.cross	15
comname	Common	Common name(s) of the object.	N/A	N/A	15
ned_notes	NED note	Notes about the object exported from NED	N/A	meta.note	15
sources	Sources	Sources of the various categories of data Note s	N/A	meta.bib	15
notes	Notes	Notes about the object from OpenNGC	N/A	meta.note	15

Copyright, License, Acknowledgements

OpenNGC is licensed under the Creative Commons Attribution Share-Alike 4.0 License
https://spdx.org/licenses/CC-BY-SA-4.0.html

VOResource XML (that's something exclusively for VO nerds)

Note s

The numbers correspond to the following resources:

1	NASA Extragalactic Database
2	SIMBAD Astronomical Database
3	HyperLeda (2003A&A...412...45P)
4	Harold Corwin's NGC/IC Positions and Notes
5	HEASARC mwsc table
6	HEASARC smcclustrs table
7	HEASARC lmcextobj table
8	HEASARC plnebulae table
9	HEASARC lbn table
10	HEASARC messier table
11	HEASARC lyngaclust table
99	OpenNGC revised data

Note t

The object type is encoded as follows:

`*`	Star
`**`	Double star
`*Ass`	Association of stars
`OCl`	Open Cluster
`GCl`	Globular Cluster
`Cl+N`	Star cluster + Nebula
`G`	Galaxy
`GPair`	Galaxy Pair
`GTrpl`	Galaxy Triplet
`GGroup`	Group of galaxies
`PN`	Planetary Nebula
`HII`	HII Ionized region
`DrkN`	Dark Nebula
`EmN`	Emission Nebula
`Neb`	Nebula
`RfN`	Reflection Nebula
`SNR`	Supernova remnant
`Nova`	Nova star
`NonEx`	Nonexistent object
`Dup`	Duplicated object (cf. NGC or IC column)
`Other`	See object notes

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