4C 18.47

Query : 4C 18.47
C.D.S. - SIMBAD4 rel 1.7 - 2021.04.19CEST01:32:25

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


Basic data :
4C 18.47 -- BL Lac - type object
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:
Sy1 (), Rad (4C,BWE,...), QSO (2015MNRAS,QSO,...), IR (2MASS,2MASSI,...), BLL (2014ApJS), * (Gaia), AGN ([VV2010c]), G (LEDA), X (RX)
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) :
16 09 11.2571758385 +17 56 16.288327632 (Optical) [ 0.2918 0.2686 90 ] A 2018yCat.1345....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) :
16 06 56.6541506356 +18 04 06.493157740 [ 0.2918 0.2686 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) :
032.2977926438582 +43.7128212623829 [ 0.2918 0.2686 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 :
0.219 -0.156 [0.542 0.482 90] A 2018yCat.1345....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) 86711 [318] / z(spectroscopic) 0.34680 [0.00106] / cz 103968.0 [317.8]
   C 2009yCat.2294....0A
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 20.21 [~] D 2010A&A...518A..10V
V 19.60 [~] D 2010A&A...518A..10V
G 19.0381 [0.0243] C 2018yCat.1345....0G
J 16.673 [0.166] C 2010AJ....139.2360S
H 15.639 [0.157] C 2010AJ....139.2360S
K 14.978 [0.132] C 2010AJ....139.2360S
u 19.697 [0.036] C 2010AJ....139.2360S
g 19.790 [0.020] C 2010AJ....139.2360S
r (AB) 18.320 [0.009] C 2012ApJS..203...21A
i 18.919 [0.018] C 2010AJ....139.2360S
z 18.138 [0.027] C 2010AJ....139.2360S
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within radius 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:



The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (36) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

4C 18.47 MITG J160911+1755 RGB J1609.2+1756 WISE J160911.25+175615.8
BWE 1606+1804 MITG J160913+1756 RGB J1609+179 [HB93] 1606+180
DA 402 MRC 1606+180 RX J1609.1+1756 [VV2000] J160911.4+175615
EF B1606+1804 NRAO 1606+18 SDSS J160911.25+175616.2 [VV2003] J160911.4+175615
GB6 B1606+1804 NVSS J160911+175616 SDSS J160911.26+175616.2 [VV2006] J160911.4+175615
87GB 160655.4+180413 OHIO S 113 TIC 103868986 [VV2010c] J160911.4+175615
LEDA 2819524 PKS J1609+1757 VRO 18.16.02 [VV96] J160911.4+175615
2MASS J16091126+1756160 PKS 1606+180 WB 1606+1804 [VV98] J160911.4+175615
2MASSI J1609112+175616 QSO B1606+180 WISEA J160911.25+175615.8 Gaia DR2 1199811036972579456

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References (51 between 1850 and 2021) (Total 51)
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 : 9    PM : 1   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : 4C 18.47

Link by name to the catalogue in VizieR :

4C 18.47 BWE 1606+1804 2MASS J16091126+1756160 2MASSI J1609112+175616 MITG J160911+1755
MITG J160913+1756 NVSS J160911+175616 PKS J1609+1757 PKS 1606+180 SDSS J160911.25+175616.2
SDSS J160911.26+175616.2 WISEA J160911.25+175615.8 WISE J160911.25+175615.8 Gaia DR2 1199811036972579456

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Annotations :
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Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

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2021.04.19-01:32:25

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