8C 1803+784

Basic data :
8C 1803+784 -- BL Lac 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,8C,...), QSO (2008ApJS,QSO,...), gam (2AGL,0FGL,...), Bla (2016ApJS,RBPL,...), X (2009A&A,2E,...), BLL (2010ApJ,[VV98b]), AGN (2011ApJ,CGRaBS), MIR (WISEA,WISE), Bz? ([SRM2005]), * (Gaia), NIR (2MASS), IR (IRAS) 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) : 18 00 45.6838528560 +78 28 04.018028016 (Optical) [ 0.0269 0.0299 90 ] A 2020yCat.1350....0G 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) : 18 03 39.2394958985 +78 27 54.312033375 [ 0.0269 0.0299 90 ] 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) : 110.0376148618935 +29.0649861602471 [ 0.0269 0.0299 90 ] 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 : -0.009 0.018 [0.033 0.042 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) 142932 [~] / z(emission) 0.680 [~] / cz 203859 [~]    (Opt) D 2016ApJ...818..113N 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): 0.0000088 0.0000068 82 (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 (7) : B 16.4 [~] E ~ V 15.90 [~] D 2010ApJ...710..764K R 15.46 [~] D 2008ApJS..175...97H G 15.799002 [0.033086] C 2020yCat.1350....0G J 12.433 [0.021] C 2003yCat.2246....0C H 11.617 [0.019] C 2003yCat.2246....0C K 10.804 [0.015] 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 Specfind radio flux densities.

8C 1803+784	IERS B1803+784	RORF 1803+784	[DGT2001] B1803+784
2AGL J1800+7821	IRAS 18036+7827	1RXS J180043.6+782806	[HB93] 1803+784
6C 180338+782745	IRAS F18036+7827	S5 1803+78	[HMI96] 1803+7827
CGRaBS J1800+7828	IVS B1803+784	S5 1803+784	[IN88] 1803+784
CJF B1803+784	JVAS B1803+784	SWIFT J1759.6+7846	[MGL2009] BZB J1800+7828
CLASS J180045.6824+782804.011	JVAS J1800+7828	TIC 288432319	[MML2015] 5BZB J1800+7828
2E 4007	1Jy 1803+78	VLSS J1800.7+7828	[OKM2018] SWIFT J1759.6+7846
2E 1803.5+7828	1Jy 1803+784	VSOP J1800+7828	[P82] 1803+784
0FGL J1802.2+7827	KNOWS J180044+782812	WB 1803+7827	[PW82] 1803+78
1FGL J1800.4+7827	MASIV J1800+7828	WISEA J180045.69+782804.1	[SRM2005] J180045.68+782804.0
2FGL J1800.5+7829	2MASS J18004568+7828040	WISE J180045.70+782804.1	[VV2000] J180045.7+782805
3FGL J1800.5+7827	NVSS J180045+782805	WISE J180045.69+782804.1	[VV2003] J180045.7+782805
4FGL J1800.6+7828	NVSS J180045+782804	WMAP 72	[VV2006] J180045.7+782805
1FHL J1800.5+7829	QSO B1803+78	WMAP J1800+7828	[VV2010] J180045.7+782805
2FHL J1801.2+7828	QSO B1803+784	WMAP J1800+7827	[VV98b] J180045.7+782805
3FHL J1800.7+7828	QSO B1803+7827	WN B1803.6+7827	Gaia DR3 2293842045955346176
1FLE J1753+7815	QSO J1800+7828	9Y-MST J1800+7827	Gaia DR1 2293842045955346176
ICRF J180045.6+782804	RBPL J1800+7828	[BDW2002] q1803+7827	Gaia DR2 2293842045955346176

References (713 between 1850 and 2023) (Total 713) 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 : 8C 1803+784

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