NGC 6521

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Basic data :
NGC 6521 -- Seyfert 1 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: Sy1 (), Rad (BWE,6C,...), G (Ref,LEDA,...), AGN (Ref,[VV2000c],...), Bla (Ref,[MGL2009],...), GiC (GIN,[WCB96]), GiG ([CHM2007],[HGH95]), X (Ref), * (Gaia) 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] : coordinates error major axis, minor axis (in mas at defined epoch and convolved with error on propermotion), 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) : 17 55 48.4338041826 +62 36 44.127834813 (Optical) [ 1.7532 2.2484 90 ] C 2018yCat.1345....0G 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] : coordinates error major axis, minor axis (in mas at defined epoch and convolved with error on propermotion), 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) : 17 55 23.5879280423 +62 37 03.286615537 [ 2.2484 1.7532 0 ] 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] : coordinates error major axis, minor axis (in mas at defined epoch and convolved with error on propermotion), 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) : 091.8183608813098 +30.2170862256918 [ 2.2484 1.7532 0 ] 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) 8091 [73] / z(~) 0.027362 [0.000244] / cz 8202.92 [73.15]    D 2002LEDA.........0P 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) (incl) : inclination (in units of 15° from 0 to 7) (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): 1.053 0.779 160 (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 (6) : B 14.3 [~] E ~ R 9.3 [~] E 2009A&A...495..691M G 18.4043 [0.0152] C 2018yCat.1345....0G J 10.536 [0.020] C 2006AJ....131.1163S H 9.861 [0.025] C 2006AJ....131.1163S K 9.581 [0.034] 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 6521	IVS B1755+626	WN B1755+6237	[VV2000c] J175548.5+623644
BWE 1755+6237	JVAS B1755+626	WN B1755.3+6237	[VV2003c] J175548.5+623644
6C 175524+623700	JVAS J1755+6236	Z 300-95	[VV2006c] J175548.5+623644
6C 175521+623651	JVAS J1755+626	Z 301-2	[VV2010c] J175548.5+623644
7C 175523.30+623708.00	LEDA 61121	Z 1755.4+6237	[VV98c] J175548.5+623644
CLASS J175548.4406+623644.118	2MASX J17554844+6236435	[CHM2007] HDC 1019 J175548.44+6236435	[WCB96] J25 A
GB6 B1755+6237	MCG+10-25-119	[CHM2007] LDC 1271 J175548.44+6236435	[ZEH2003] RX J1755.8+6236 3
GB6 J1755+6236	NVSS J175548+623644	[HGH95] J175548.6+623644	Gaia DR2 1436561973764655104
87GB 175521.2+623712	UGC 11061	[MGL2009] BZU J1755+6236
GIN 645	UZC J175548.3+623643	[MGL2015] 5BZG J1755+6236

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References (53 between 1850 and 2019) (Total 53) 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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