NGC 6251

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Basic data :
NGC 6251 -- Seyfert 2 Galaxy Origin of the objects types : (Ref) Object type as listed in the reference "Ref" (acronym) Object type linked to the acronym according to the original reference () Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases Other object types: Sy2 (), Rad (6C,CJ1,...), AGN (2008ApJS,CGRaBS,...), gam (3EG,EGR,...), G (2016A&A,LEDA,...), X (2009A&A,1AXG,...), Bla (2009A&A,[MGL2009],...), * (Gaia), GiC ([WWB2000]), rG ([LCF2001]), Bz? (2015Ap&SS), QSO (QSO), IR (2MASS) Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference ICRS coord. (ep=J2000) : 16 32 31.96990024 +82 32 16.3999540 (Radio) [ 0.0478 0.0462 90 ] A 2015AJ....150...58F Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference FK4 coord. (ep=B1950 eq=1950) : 16 37 56.98846211 +82 38 18.5574276 [ 0.0478 0.0462 90 ] Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference Gal coord. (ep=J2000) : 115.76378461977 +31.19583272484 [ 0.0478 0.0462 90 ] Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode" pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr) pm-dec : mu-dec (expressed in the ICRS system in mas/yr) [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg) quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the proper motion reference Proper motions mas/yr : 0.00016 -0.00158 [0.00324 0.00254 90] ~ 2017ApJS..233....3T Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode" value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity) [error] : error of the corresponding value displayed before (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown) quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the value's origin Radial velocity / Redshift / cz : V(km/s) 5936 [~] / z(spectroscopic) 0.02 [~] / cz 5996 [~]    (Opt) D 2017ApJS..233....3T Syntax of morphological type is : mtype quality bibcode mtype : Hubble morphological class (spirals, ellipticals, etc) quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the morphological type reference Morphological type: E D ~ Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode" maj-axis : major axis size (arc minutes) min-axis : minor axis size (arc minutes) angle : orientation angle (in degrees) (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam) quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the angular size reference Angular size (arcmin): 1.037 0.933 30 (NIR) C 2006AJ....131.1163S Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode" filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z (System) : may be AB (default is Vega) flux-value : value of flux or magnitude [error] : error value quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality) MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4]) bibcode : bibcode of the flux reference Fluxes (8) : U 15.24 [0.07] C 2010MNRAS.407.2475F B 14.66 [0.03] C 2010MNRAS.407.2475F V 12.89 [0.05] C 2010MNRAS.407.2475F R 7.62 [~] D 2008ApJS..175...97H G 16.6706 [0.0150] C 2018yCat.1345....0G J 10.060 [0.017] C 2006AJ....131.1163S H 9.307 [0.019] C 2006AJ....131.1163S K 9.026 [0.024] C 2006AJ....131.1163S	SIMBAD with radius arcmin Interactive AladinLite view 2MASS DSS SDSSXMMIRACIRISGALEX VizieR photometry viewer    within radius arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR. The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding. Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).

NGC 6251	ICRF J163231.9+823216	RX J1632.5+8232	[HB91] 1637+826
1AXG J163223+8232	IERS B1637+826	1RXS J163230.3+823214	[LCF2001] J1632+825
6C 1636+8239	INTREF 701	S5 1637+826	[MGL2009] BZU J1632+8232
CGRaBS J1632+8232	INTREF 686	S5 1637+82	[MHM2002] B1
CJ1 1637+826	1Jy 1637+826	TIC 159539373	[MHM2002] 1
2E 3741	KNOWS J163235+823228	UGC 10501	[MML2015] 5BZU J1632+8232
2E 1637.8+8238	LEDA 58472	UZC J163231.7+823216	[VV2000c] J163232.1+823217
3EG J1621+8203	2MASS J16323197+8232165	WB 1636+8240	[VV2003c] J163232.1+823217
EGR J1607+8216	2MASX J16323175+8232165	WMAP J1632+8232	[VV2006c] J163232.1+823217
1FGL J1635.4+8228	MCG+14-08-010	9Y-MST J1632+8232	[VV2010c] J163232.1+823217
2FGL J1629.4+8236	NPM1G +82.0085	Zel 1637+8238	[VV98c] J163232.0+823216
3FGL J1630.6+8232	NVSS J163231+823216	Z 1638.0+8239	[WWB2000] 1
4FGL J1630.6+8234	NVSS J163226+823220	Z 367-13	[ZEH2003] RX J1632.5+8232 2
3FHL J1632.2+8232	QSO B1637+826	[GGC2003] 1	Gaia DR2 1722820478889987840

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References (680 between 1850 and 2021) (Total 680) Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system). Follow new references on this object

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External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : NGC 6251

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