QSO B2254+0727

Query : QSO B2254+0727

Basic data :
QSO B2254+0727 -- 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 (2020A&A,BWE,...), BLL (2010A&A,[VV2000b],...), Bla (2016ApJS,[DGT2001],...), QSO (2016A&A,QSO,...), X (2009A&A,1E,...), MIR (WISEA,WISE), AGN (2020MNRAS), G (2018MNRAS), * (Gaia), UV (PG), NIR (2MASS), Opt (LAMOST)
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) : 		22 57 17.30311778 +07 43 12.3025633 (Radio) [ 0.0346332 0.035 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) : 		22 54 45.98544017 +07 27 08.8452774 [ 0.0346332 0.035 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) : 		080.42536183996 -45.52195276547 [ 0.0346332 0.035 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 : 		0.034 0.275 [0.132 0.115 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) 51630 [~] / z(spectroscopic) 0.190 [~] / cz 56961 [~]
   D 2011NewA...16..503M
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 17.07 [~] D 2010A&A...518A..10V
V 16.36 [~] D 2010A&A...518A..10V
G 17.769951 [0.011502] C 2020yCat.1350....0G
J 14.204 [0.043] C 2003yCat.2246....0C
H 13.322 [0.051] C 2003yCat.2246....0C
K 12.543 [0.031] C 2003yCat.2246....0C
u (AB) 17.242090 [~] D 2018MNRAS.474.1873W
g (AB) 16.664419 [~] D 2018MNRAS.474.1873W
r (AB) 16.137590 [~] D 2018MNRAS.474.1873W
i (AB) 15.799880 [~] D 2018MNRAS.474.1873W
z (AB) 15.501820 [~] D 2018MNRAS.474.1873W
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 Simbad points in this preview
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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!). sed-help-icon
Some important notes on this object about identifications and objects associations.
notes:

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (55) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO B2254+0727 1Jy 2254+07 QSO B2254+074 [IN88] 2254+074
BWE 2254+0727 1Jy 2254+074 RFC J2257+0743 [MGL2009] BZB J2257+0743
CLASS J225717.3062+074312.307 LAMOST J225717.30+074312.2 RORF 2254+074 [MML2015] 5BZB J2257+0743
1E 2254.7+0727 LAMOST J225717.30+074312.4 S2 2254+074 [P82] 2254+074
2E 4662 2MASS J22571731+0743122 S2 2254+07 [VV2000b] J225717.3+074312
2E 2254.7+0727 MITG J2257+0743 TGSSADR J225717.3+074312 [VV2003b] J225717.3+074312
FIRST J225717.3+074312 MITG J225718+0743 TIC 257425179 [VV2006b] J225717.3+074312
GB6 B2254+0727 NVSS J225717+074312 TXS 2254+074 [VV2010b] J225717.3+074312
87GB 225446.1+072711 OHIO Y 091 WB 2254+0727 [VV98b] J225717.3+074312
ICRF J225717.3+074312 PG 2254+075 WISEA J225717.30+074312.3 [VYP98] 2254+074
IERS B2254+074 PKS J2257+0743 WISE J225717.30+074312.3 Gaia DR3 2712232853416646912
IVS B2254+074 PKS 2254+07 Zel 2254+074 Gaia DR1 2712232849121358720
JVAS B2254+074 PKS 2254+074 [DGT2001] B2254+074 Gaia DR2 2712232853416646912
JVAS J2257+0743 PMN J2257+0743 [HB93] 2254+074

References (303 between 1850 and 2024) (Total 303)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

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Collections of Measurements


velocities : 7    PM : 3   

   

Observing logs


ISO : 3   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : QSO B2254+0727

Link by name to the catalogue in VizieR :

BWE 2254+0727 2E 4662 FIRST J225717.3+074312 IERS B2254+074 2MASS J22571731+0743122
MITG J2257+0743 MITG J225718+0743 NVSS J225717+074312 PG 2254+075 PKS J2257+0743
PKS 2254+07 PKS 2254+074 PMN J2257+0743 WISEA J225717.30+074312.3 WISE J225717.30+074312.3
Gaia DR3 2712232853416646912 Gaia DR1 2712232849121358720 Gaia DR2 2712232853416646912

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