3C 303

Basic data :
ICRF J144302.7+520137 -- 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 (2014ApJS,ICRF,...), AGN (2007AJ,[HB91],...), X (2015ApJS,RX,...), QSO (2015ApJ,QSO), rG (2017MNRAS), G (LEDA,2MASX), gam (3FGL,4FGL), MIR (WISEA,WISE), Sy1 (2015ApJS), BL? (2021MNRAS), AG? (2022ApJS), * (Gaia), NIR (2MASS), 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) : 14 43 02.76069031 +52 01 37.2985156 (Radio) [ 0.0946931 0.1042 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) : 14 41 24.85591432 +52 14 18.5267818 [ 0.0946931 0.1042 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) : 090.52760598502 +57.50026841480 [ 0.0946931 0.1042 0 ] 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 : 0.016 -0.056 [0.202 0.219 90] A 2020yCat.1350....0G 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) 39371 [12] / z(spectroscopic) 0.14121 [0.00004] / cz 42333.7 [12.0]    (Opt) C 2012ApJS..203...21A Syntax of parallax is : 'value quality [error] bibcode' value : parallax value quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) [error] : mean error bibcode : bibcode of the parallax reference Parallaxes (mas): 0.2109 [0.1918] A 2020yCat.1350....0G 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): 0.177 0.131 90 (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 18.96 [~] D 2010A&A...518A..10V V 18.29 [~] D 2010A&A...518A..10V G 18.820854 [0.006437] C 2020yCat.1350....0G J 14.614 [0.142] D 2006AJ....131.1163S H 13.753 [0.156] D 2006AJ....131.1163S K 13.174 [0.134] D 2006AJ....131.1163S u (AB) 18.549 [0.028] C 2012ApJS..203...21A g (AB) 17.572 [0.006] B 2012ApJS..203...21A r (AB) 16.671 [0.004] B 2012ApJS..203...21A i (AB) 16.104 [0.004] B 2012ApJS..203...21A z (AB) 15.901 [0.010] B 2012ApJS..203...21A	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: 3C 303 has 2 radio components East and West: [K76] 3C 303E and [K76] 3C 303W. The X-ray source 1RXS J144302.8+520141 was identified with the active galaxy nucleus SDSS J144302.75+520137.2 by Anderson et al. (2007AJ....133..313A). See also Specfind radio flux densities.

ICRF J144302.7+520137	GB6 B1441+5214	RGB J1443+520B	[GW2008] CoNFIG 199
BWE 1441+5214	87GB 144124.2+521436	RGB J1443+520A	[HB91] 1441+522
3C 303.0	GRA B1441+52	RX J1443.0+5201	[K76] 3C 303 B
3C 303	IERS B1441+522	S4 1441+52	[KJK2017] J1443+5201
4C 52.33	ILT J144301.53+520138.2	S4 1441+522	[LK2005] C
6C 144123+521422	IVS B1441+522	SDSS J144302.76+520137.2	[OKM2018] SWIFT J1442.9+5206
7C 144123.39+521422.00	1Jy 1441+52	SDSS J144302.75+520137.2	[VV2000c] J144302.7+520137
CJ1 1441+522	LEDA 52571	TIC 155899472	[VV2003c] J144302.7+520137
3CR 303	2MASS J14430276+5201373	TXS 1441+522	[VV2006c] J144302.7+520137
DA 369	2MASX J14430282+5201368	WB 1441+5214	[VV2010c] J144302.7+520137
3FGL J1442.6+5156	NRAO 452	1WGA J1443.0+5201	[VV98c] J144302.7+520137
4FGL J1443.1+5201	NVSS J144301+520138	WISEA J144302.76+520137.4	[ZEH2003] RX J1443.0+5201 4
FIRST J144301.0+520140	OHIO Q 568	WISE J144302.77+520137.4	Gaia DR3 1605626386344892672
FIRST J144302.5+520137	QSO B1441+5214	WMAP J1442+5201	Gaia DR1 1605626382049550720
FIRST J144302.6+520137	RGB J1443.0+5201	WN B1441.3+5214	Gaia DR2 1605626386344892672

References (300 between 1850 and 2024) (Total 300) 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

Collections of Measurements

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : 3C 303

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