IERS B1204+281

Basic data :
7C 1204+2811 -- 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 (2014ApJS,7C,...), QSO (2015Ap&SS,QSO,...), Bla (2009A&A,[MGL2009],...), X (2009A&A,RX,...), MIR (WISEA,WISE), Opt (LAMOST,SDSS), AGN (CGRaBS), Bz? ([SRM2005]), G (2016MNRAS), * (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] : 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 07 27.90046635 +27 54 58.8497008 (Radio) [ 0.0791293 0.1263 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 04 55.10784390 +28 11 40.5494050 [ 0.0791293 0.1263 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) : 205.77833963557 +80.22239481204 [ 0.0791293 0.1263 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 : -0.183 0.059 [0.182 0.126 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) 245866 [78] / z(spectroscopic) 2.18097 [0.00026] / cz 653838.4 [77.9]    (Opt) C 2020ApJS..249....3A 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 (8) : V 18.1 [~] E ~ R 18.69 [~] D 2008ApJS..175...97H G 18.358459 [0.003975] C 2020yCat.1350....0G u (AB) 19.289 [0.024] C 2020ApJS..249....3A g (AB) 18.864 [0.009] B 2020ApJS..249....3A r (AB) 18.758 [0.010] C 2020ApJS..249....3A i (AB) 18.520 [0.011] C 2020ApJS..249....3A z (AB) 18.287 [0.026] 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.

7C 1204+2811	JVAS B1204+281	TXS 1204+281	[VV2003] J120727.8+275501
B2 1204+28	LAMOST J120727.90+275458.8	VCS1 J1207+2754	[VV2006] J120727.8+275501
B2.2 1204+28	MITG J120727+2754	VIPS J12074+2754	[VV2010] J120727.8+275501
BWE 1204+2811	NRAO 1204+28	WB 1204+2811	[VV96] J120727.8+275501
CGRaBS J1207+2754	NVSS J120727+275459	WISEA J120727.90+275458.9	[VV98] J120727.8+275501
CLASS J120727.9023+275458.844	OHIO N 208	WISE J120727.90+275458.9	[W72] 1205+28
FIRST J120727.8+275458	QSO B1204+281	[ATZ98] D048	EQ 1204+282
GB6 B1204+2811	RGB J1207+279	[DT2000] NGC 4104 23	Gaia DR3 4006985649995293440
87GB 120453.9+281142	RGB J1207.5+2755	[HB93] 1204+281	Gaia DR1 4006985649995293440
ICRF J120727.9+275458	RX J1207.4+2755	[MGL2009] BZQ J1207+2754	Gaia DR2 4006985649995293440
IERS B1204+281	1RXS J120728.3+275507	[MML2015] 5BZQ J1207+2754
IVS B1204+281	S3 1204+28	[SRM2005] J120727.90+275458.8
JVAS J1207+2754	SDSS J120727.90+275458.8	[VV2000] J120727.8+275501

References (80 between 1850 and 2023) (Total 80) 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 : IERS B1204+281

Link by name to the catalogue in VizieR :

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

report an error concerning the data of this object

Store this result in Votable, in Ascii, or in the CDS portal

To bookmark this query, right click on this link: simbad:IERS B1204+281 and select 'bookmark this link' or equivalent in the popup menu