NGC 7720

Basic data :
NGC 7720 -- 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: Rad (2020A&A,ASB,...), GiC (GIN,NFP,...), G (2015ApJS,LEDA,...), QSO ([VV2000],[VV2003],...), rG ([MO2001b],[OLK95],...), X (RX,2XMM,...), AGN ([HB91],[VV2010c]), BiC (2008MNRAS,[CAC2009]), Sy1 (2012ApJ), GiP (KPG), GiG ([CHM2007]), IG (VV), * (Gaia), Opt (SDSS) 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) : 23 38 29.38324020 +27 01 53.2580084 (Radio) [ 0.124929 0.1832 0 ] A 2020A&A...644A.159C 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) : 23 35 58.97773634 +26 45 16.0690649 [ 0.124929 0.1832 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] : 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) : 103.50157662550 -33.07300751411 [ 0.124929 0.1832 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) 8962 [44] / z(~) 0.03035 [0.00015] / cz 9100.0 [44.0]    (Opt) C 2004AJ....128.1558S 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+cG 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): 1.027 0.698 25 (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 (11) : B 13.9 [~] D 1999PASP..111..438F V 13.3 [~] E ~ G 20.130051 [0.017535] C 2020yCat.1350....0G J 10.285 [0.020] C 2006AJ....131.1163S H 9.573 [0.026] C 2006AJ....131.1163S K 9.275 [0.031] C 2006AJ....131.1163S u (AB) 15.781 [0.011] C 2015ApJS..219...12A g (AB) 13.730 [0.002] B 2015ApJS..219...12A r (AB) 12.804 [0.002] B 2015ApJS..219...12A i (AB) 12.318 [0.002] B 2015ApJS..219...12A z (AB) 11.961 [0.002] B 2015ApJS..219...12A	SIMBAD within arcmin ', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay points in this preview 2MASS DSS SDSSXMMIRACIRISGALEX All (CDSPortal) Send to within 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!).
Some important notes on this object about identifications and objects associations. notes: brightest cluster galaxy in ACO 2634 (2004ApJ...617..879L) see companion NGC 7720A Brightest Galaxy of the cluster: ACO 2634 (Hudson et al., 2001MNRAS.327..265H) See also Specfind radio flux densities.

NGC 7720	1Jy 2335+267	2XMM J233829.3+270153	[OWH82] 233555.4+264402
ASB 78	KPG 588a	Z 2336.0+2645	[PCD91] 233559.00+264515.0
B2 2335+26	LEDA 71985	Z 476-91	[PCD91] 2335+267 1
2C 1906	LHE 542	[BO85] ACO 2634 1	[PL95] J233829.44+270149.7
3C 465	MAPS-PP O-843-46905	[BS88] ACO 2634 1	[PRB93] 201
3C 465.0	2MASX J23382938+2701526	[BTM97] ACO 2634 1	[SM98] 1
4C 26.64	MCG+04-55-036	[CAC2009] A2634 a	[SRT77] ACO 2634 6
3CR 465	MITG J233827+2701	[CCA99] UGC 12716a	[VV2000] J233829.4+270152
CTA 106	NFP J233829.4+270154	[CHM2007] LDC 1590 J233829.38+2701526	[VV2003] J233829.4+270152
CTD 143	NRAO 715	[CHM2007] HDC 1248 J233829.38+2701526	[VV2006] J233829.4+270152
Cul 2335+26	PKS 2335+26	[D80] ACO 2634 77	[VV2010c] J233829.4+270152
Cul 2335+267	PKS J2335+2701	[FWB89] Galaxy 468	[VV96] J233829.4+270152
DA 604	PKS 2335+267	[HB91] 2335+267	[VV98] J233829.4+270152
DB 124	RX J233829.1+270153	[L84] A2634-G1	[WCB96] ACO 2634 A
GB6 B2335+2644	S1 2335+26	[LGC91] ACO 2634 1221	[YZC2001] 86
87GB 233557.7+264453	SDSS J233829.38+270153.2	[LO95] 2335+267	[YZC2001] 87
GIN 716	UGC 12716	[LPS2014] 354.6227+27.0305	[ZBO89] ACO 2634-1
ICRF J233829.3+270153	UZC J233829.4+270151	[LVL2003] J233829.40+270153.2	[ZEH2003] RX J2338.4+2700 8
IERS B2335+267	VRO 26.23.02	[MO2001b] J233829+270155	Gaia DR3 2864833247602031360
JVAS J2338+2701	VV 1991	[MO2001b] J233829.5+270155.1
1Jy 2335+26	WB 2335+2644	[OLK95] 2335+267

References (533 between 1850 and 2023) (Total 533) 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 7720

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