@1999444

Basic data :
3C 279 -- Blazar 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,3C,...), gam (1AGL,2AGL,...), QSO (2009ApJS,QSO,...), X (2012ApJS,1AXG,...), Bla (2009A&A,[DGT2001],...), AGN (2011ApJ,CGRaBS), G (2012A&A,LEDA), smm (JCMTSE,JCMTSF), MIR (WISEA,WISE), IR (IRAS,2MASSI), Q? (2021MNRAS), AG? (2022ApJS), V* (AAVSO), * (Gaia), cm (AT20G), NIR (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) : 12 56 11.16657958 -05 47 21.5251510 (Radio) [ 0.0324621 0.0388 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) : 12 53 35.83695473 -05 31 07.8833574 [ 0.0324621 0.0388 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) : 305.10433409135 +57.06240551912 [ 0.0324621 0.0388 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 : 0.158 0.187 [0.066 0.046 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) 121212 [150] / z(emission) 0.53541840 [0.0005] / cz 160514.3982 [150]    (Opt) C 2022ApJS..261....2K 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): 0.0214 [0.0558] A 2020yCat.1350....0G 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 (7) : B 18.01 [~] D 2010A&A...518A..10V V 17.75 [~] D 2010A&A...518A..10V R 15.87 [~] D 2008ApJS..175...97H G 15.445930 [0.034956] C 2020yCat.1350....0G J 12.585 [0.027] C 2003yCat.2246....0C H 11.740 [0.026] C 2003yCat.2246....0C K 10.941 [0.026] C 2003yCat.2246....0C	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: see also MSH12-004 See also Specfind radio flux densities.

3C 279	HE 1253-0531	QSO J1256-0547	[CAB95] IRAS F12535-0530
1AGL J1256-0549	ICRF J125611.1-054721	RBS 1184	[CGL99] 12
2AGL J1255-0543	IERS B1253-055	RORF 1253-055	[CMG2008] 194.20-5.66
AT20G J125611-054721	IGR J12562-0547	RX J1256.1-0547	[DGT2001] B1253-055
1AXG J125611-0547	INTREF 530	1RXS J125611.2-054719	[GGR94] 1253-055
4C -05.55	IRAS F12535-0530	SPASS J125610-054734	[GR92] 1253-055
CGRaBS J1256-0547	IVS B1253-055	SWIFT J1256.2-0551	[GW2008] CoNFIG 151
CTA 56	JCMTSE J125611.1-054720	SWIFT J1256.1-0547	[HB93] 1253-055
Cul 1253-055	JCMTSF J125611.1-054720	TeV J1256-057	[IN88] 1253-055
1E 1253.5-0531	1Jy 1253-055	TGSSADR J125611.0-054720	[KRL2007b] 126
2E 2900	1Jy 1253-05	TIC 175710789	[MGL2009] BZQ J1256-0547
2E 1253.5-0531	LEDA 2817645	TXS 1253-055	[MML2015] 5BZQ J1256-0547
2EG J1256-0546	2MASS J12561117-0547215	UT 1253-055	[P82] 1253-055
3EG J1255-0549	2MASSI J1256111-054721	VCS1 J1256-0547	[S77] 221
EGR J1256-0552	MRC 1253-055	VLSSr J125611.1-054723	[VV2000] J125611.1-054721
1ES 1253-05.5	MSH 12-0-02	VLSS J1256.1-0547	[VV2003] J125611.1-054721
0FGL J1256.1-0547	NRAO 413	VSOP J1256-0547	[VV2006] J125611.1-054721
1FGL J1256.2-0547	NVSS J125611-054720	WB 1253-0531	[VV2010] J125611.1-054721
2FGL J1256.1-0547	OHIO N -089	WISEA J125611.15-054721.7	[VV96] J125611.1-054721
3FGL J1256.1-0547	PBC J1256.1-0547	WISE J125611.17-054721.5	[VV98] J125611.1-054721
4FGL J1256.1-0547	PCCS2 143 G305.09+57.06	WISE J125611.15-054721.7	[VYP98] 1253-055
1FHL J1256.1-0547	PKS 1253-05	WMAP 181	[WCO2009] J125612-054728
2FHL J1256.2-0548	PKS 1253-055	WMAP J1256-0547	[WPW2003] J1256-0547
3FHL J1256.1-0547	PKS J1256-0547	WMAP J1256-0546	[WTW94] 1253-055
FIRST J125611.1-054721	PLCKERC -857 G305.11+57.05	XMMSL1 J125611.0-054720	AAVSO 1251-05
1FLE J1256-0545	PMN J1256-0547	XSS J12565-0537	Gaia DR3 3677618218816419456
GeV J1256-0546	QSO B1253-055E	9Y-MST J1256-0546	Gaia DR1 3677618214520515968
GLEAM J125611-054719	QSO B1253-055	[BAG2012] 194.0513-05.7909	Gaia DR2 3677618218816419456
GRA B1254-05	QSO B1253-05	[BDW2002] q1253-0531

References (3041 between 1850 and 2024) (Total 3041) 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 : 3C 279

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