W Com

Query : W Com C.D.S. - SIMBAD4 rel 1.5.6 - 2016.07.27CEST09:50:33

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


Basic data :
7C 1219+2830 -- 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:
Rad (7C,B2,...), gam (1AGL,2EG,...), X (Ref,2E,...), BLL (Ref,[VV2000b],...), Bla (Ref,[DGT2001],...), V* (AN,V*,...), QSO (QSO,[HB93],...), AGN (Ref,CGRaBS), IR (2MASS,WISE), GiC (CAIRNS), AG? (Ref)
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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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 21 31.69052 +28 13 58.5002 (Radio) [ 0.270 0.018 90 ] A 2009A&A...493..317L
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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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
FK5 coord. (ep=J2000 eq=2000) :
12 21 31.691 +28 13 58.50 [ 0.270 0.018 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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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 19 01.12 +28 30 36.7 [ 0.270 0.018 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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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) :
201.7352 +83.2880 [ 0.270 0.018 90 ]
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) 29266 [48] / z(spectroscopic) 0.10289 [0.00016] / cz 30845.6 [48.0]
   C 2009yCat.2294....0A
Syntax of fluxes (or magnitudes) is : "filter-name flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, J, H, K, u, g, r, i, z
  • 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 16.81 [~] D 2010A&A...518A..10V
V 16.11 [~] D 2010A&A...518A..10V
R 14.24 [~] D 2008ApJS..175...97H
J 12.478 [0.026] C 2003yCat.2246....0C
H 11.742 [0.035] C 2003yCat.2246....0C
K 10.972 [0.021] C 2003yCat.2246....0C
u (AB) 15.877 [0.005] B 2009yCat.2294....0A
g (AB) 15.379 [0.003] B 2009yCat.2294....0A
r (AB) 15.045 [0.004] B 2009yCat.2294....0A
i (AB) 14.771 [0.004] B 2009yCat.2294....0A
z (AB) 14.568 [0.005] B 2009yCat.2294....0A
SIMBAD with radius arcmin
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VizieR photometry viewer    sed-help-icon
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 (74) :

7C 1219+2830 3FGL J1221.4+2814 QSO B1219+28 [ATZ98] D115
1AGL J1222+2851 1FHL J1221.6+2814 QSO B1219+285 [CRJ2004] J1221.5+2813
AN 10.1916 FIRST J122131.6+281358 RGB J1221+282 [DGT2001] B1219+285
B2 1219+28 GB6 B1219+2830 RGB J1221.5+2813 [GGR94] 1219+285
B2.2 1219+28 87GB 121900.8+283039 RORF 1219+285 [HB93] 1219+285
BWE 1219+2830 GeV J1222+2837 RX J1221.5+2814 [IN88] 1219+285
CAIRNS J122131.69+281358.5 ICRF J122131.6+281358 RX J1221.5+2813 [MGL2009] BZB J1221+2813
CGRaBS J1221+2813 IERS B1219+285 1RXS J122131.1+281402 [P82] 1219+285
CLASS J122131.6935+281358.496 INTREF 489 S3 1219+28 [VV2000b] J122131.7+281358
2E 2673 IVS B1219+285 SDSS J122131.69+281358.4 [VV2003b] J122131.7+281358
2E 1219.0+2830 JVAS J1221+2813 TXS 1219+285 [VV2006b] J122131.7+281358
2EG J1222+2821 JVAS B1219+285 V* W Com [VV2010b] J122131.7+281358
3EG J1222+2841 LINEAR 3472523 VIPS J12215+2813 [VV98b] J122131.7+281358
EGR J1222+2845 MASIV J1221+2813 VIPS 550 [VYP98] 1219+285
2EGS J1222+2821 2MASS J12213168+2813585 VRO 28.12.02 [W72] 1219+28
1ES 1218+28.5 MITG J122132+2814 WB 1219+2830 [ZEH2003] RX J1221.5+2814 2
0FGL J1221.7+2814 NRAO 1219+28 WISE J122131.68+281358.4 AAVSO 1216+28
1FGL J1221.5+2814 NVSS J122131+281358 WISE J122131.69+281358.5
2FGL J1221.4+2814 OHIO N 231 2XMM J122131.6+281358

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References (678 between 1850 and 2016)
Simbad bibliographic survey began in 1950 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Measurements (7 types) :


Einstein : 1    IUE : 2    posa : 1    V* : 1    velocities : 5    Z : 3    ze : 1   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : W Com

Link by name to the catalogue in VizieR :

BWE 1219+2830 3EG J1222+2841 FIRST J122131.6+281358 IERS B1219+285 2MASS J12213168+2813585
MITG J122132+2814 NVSS J122131+281358 1RXS J122131.1+281402 SDSS J122131.69+281358.4 V* W Com

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2016.07.27-09:50:33

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