QSO B0237+040

Basic data :
QSO B0237+040 -- 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 (2010AJ,BWE,...), QSO (2005ApJ,QSO,...), Bla (2009A&A,[MGL2009],...), AGN (2020MNRAS,CGRaBS), X (2009A&A,2E), MIR (WISEA,WISE), Opt (LAMOST,SDSS), Bz? ([SRM2005]), G (LEDA), * (Gaia), 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) : 02 39 51.26304643 +04 16 21.4117680 (Radio) [ 0.0511574 0.0557 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) : 02 37 14.41052310 +04 03 29.5548333 [ 0.0511574 0.0557 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) : 166.89543926048 -49.11948674761 [ 0.0511574 0.0557 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 : 0.044 -0.022 [0.120 0.122 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) 177514 [39] / z(spectroscopic) 0.97571 [0.00013] / cz 292510.5 [39.0]    (Opt) C 2020ApJS..249....3A 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): 0.0056 [0.1250] A 2018yCat.1345....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): 0.0000127 0.0000052 -5 (Rad) D 2010AJ....139.1713C 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) : V 18.50 [~] E ~ R 17.34 [~] D 2008ApJS..175...97H G 17.587563 [0.006257] C 2020yCat.1350....0G J 16.611 [0.111] D 2003yCat.2246....0C H 15.873 [0.143] D 2003yCat.2246....0C K 15.354 [0.160] D 2003yCat.2246....0C u (AB) 18.285 [0.017] C 2020ApJS..249....3A g (AB) 18.028 [0.006] B 2020ApJS..249....3A r (AB) 17.803 [0.006] B 2020ApJS..249....3A i (AB) 17.743 [0.007] B 2020ApJS..249....3A z (AB) 17.526 [0.018] C 2020ApJS..249....3A	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 Specfind radio flux densities.

QSO B0237+040	JVAS B0237+040	RFC J0239+0416	[MGL2009] BZQ J0239+0416
BWE 0237+0403	LAMOST J023951.26+041621.4	RORF 0237+040	[MML2015] 5BZQ J0239+0416
CGRaBS J0239+0416	LEDA 2823194	S2 0237+04	[P82] 0237+040
CLASS J023951.2616+041621.403	MASIV J0239+0416	SDSS J023951.26+041621.4	[SRM2005] J023951.26+041621.4
CRATES J023950+041626	2MASS J02395128+0416214	TGSSADR J023951.2+041620	[VV2000] J023951.3+041622
2E 632	MITG J023952+0416	TIC 328179473	[VV2003] J023951.3+041622
2E 0237.2+0403	MRC 0237+040	TXS 0237+040	[VV2006] J023951.3+041622
FIRST J023951.2+041621	NAIC 0237+041	VLSSr J023950.8+041630	[VV2010] J023951.3+041622
GB6 B0237+0403	NVSS J023951+041621	VLSS J0239.8+0416	[VV96] J023951.3+041622
87GB 023713.9+040343	OHIO D 062	VSOP J0239+0416	[VV98] J023951.3+041622
GLEAM J023951+041616	PKS J0239+0416	WB 0237+0403	[WTW94] 0237+040
ICRF J023951.2+041621	PKS 0237+040	WISEA J023951.27+041621.2	Gaia DR3 2503912229297052800
IERS B0237+040	PMN J0239+0416	WISE J023951.27+041621.2	Gaia DR1 2503912229297052800
IVS B0237+040	QSO B0237+04	Zel 0237+040	Gaia DR2 2503912229297052800
JVAS J0239+0416	QSO J0239+0416	[HB93] 0237+040

References (107 between 1850 and 2024) (Total 107) 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 : QSO B0237+040

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