LB 2449

Query : LB 2449

Basic data :
LB 2449 -- 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,6C,...), BLL (2008AJ,[NBK96],...), gam (0FGL,1FGL,...), X (2007AJ,RBS,...), Bla (2013ApJS,[DGT2001],...), QSO (2008ApJS,KODIAQ,...), AGN (2011ApJ,CGRaBS), * (GJ,SBSS,...), BL? (2007AJ), Bz? (2022ApJS,[SRM2005]), G (2021AJ), MIR (WISEA,WISE), Opt (LAMOST,SDSS), WD* (WD), blu (LB), UV (PG), NIR (2MASS)
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 48 18.7847605224 +58 20 28.717260720 (Optical) [ 0.0207 0.0222 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) : 		12 46 07.3092423182 +58 36 49.471982296 [ 0.0207 0.0222 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) : 		123.7230283980536 +58.7821419203173 [ 0.0207 0.0222 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 : 		-0.002 -0.014 [0.027 0.028 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) 163920 [507] / z(spectroscopic) 0.84739 [0.00169] / cz 254041.1 [506.6]
   D 2009ApJS..182..543A
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 (12) :
B 16.10 [~] D 2010A&A...518A..10V
V 15.78 [~] D 2010A&A...518A..10V
R 15.19 [~] D 2008ApJS..175...97H
G 15.588731 [0.019562] C 2020yCat.1350....0G
J 13.483 [0.024] C 2003yCat.2246....0C
H 12.778 [0.023] C 2003yCat.2246....0C
K 12.030 [0.022] C 2003yCat.2246....0C
u (AB) 15.965 [0.005] B 2009ApJS..182..543A
g (AB) 15.582 [0.003] B 2009ApJS..182..543A
r (AB) 15.319 [0.003] B 2009ApJS..182..543A
i (AB) 15.100 [0.003] B 2009ApJS..182..543A
z (AB) 14.934 [0.005] B 2009ApJS..182..543A
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 (70) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

6C 124606+583650 87GB 124607.1+583638 RGB J1248.3+5820 9Y-MST J1248+5820
BWE 1246+5836 GJ 3750 RGB J1248+583 [DGT2001] B1246+586
CGRaBS J1248+5820 ICRF J124818.7+582028 RX J1248.3+5820 [HMI96] 1246+5836
CJ2 1246+586 IERS B1246+586 1RXS J124818.9+582031 [MGL2009] BZB J1248+5820
CJF B1246+586 IVS B1246+586 SBSS 1246+586 [MML2015] 5BZB J1248+5820
CLASS J124818.7838+582028.725 JVAS J1248+5820 SDSS J124818.78+582028.9 [NBK96] J12483+5820
CRATES J124818+582029 JVAS B1246+586 SDSS J124818.79+582028.7 [SRM2005] J124818.78+582028.7
0FGL J1248.7+5811 JVAS J1248+583 SDSS J124818.78+582028.7 [VV2000b] J124818.8+582029
1FGL J1248.2+5820 KODIAQ J124818+582028 TIC 150343823 [VV2003b] J124818.8+582029
2FGL J1248.2+5820 LAMOST J124818.78+582028.9 TXS 1246+586 [VV2006b] J124818.8+582028
3FGL J1248.2+5820 LB 2449 VCS1 J1248+5820 [VV2010b] J124818.8+582028
4FGL J1248.3+5820 2MASS J12481877+5820285 VIPS J12483+5820 [VV98b] J124818.8+582029
1FHL J1248.1+5821 MY 124605.2+583736.7 WB 1246+5836 [ZEH2003] RX J1248.3+5820 1
2FHL J1248.1+5820 MY 124605.2+582115.9 WD 1246+586 Gaia DR3 1578013182604935168
3FHL J1248.3+5820 NVSS J124818+582028 WISEA J124818.78+582028.7 Gaia DR1 1578013178309867008
FIRST J124818.7+582028 PG 1246+586 WISE J124818.79+582028.8 Gaia DR2 1578013182604935168
GB6 B1246+5836 QSO B1246+586 WISE J124818.78+582028.7
GB6 J1248+5820 RBS 1158 WN B1246.1+5836

References (189 between 1850 and 2024) (Total 189)
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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Collections of Measurements


PM : 2    MK : 1   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : LB 2449

Link by name to the catalogue in VizieR :

BWE 1246+5836 FIRST J124818.7+582028 GJ 3750 IERS B1246+586 2MASS J12481877+5820285
NVSS J124818+582028 PG 1246+586 1RXS J124818.9+582031 SDSS J124818.78+582028.9 SDSS J124818.79+582028.7
SDSS J124818.78+582028.7 WD 1246+586 WISEA J124818.78+582028.7 WISE J124818.79+582028.8 WISE J124818.78+582028.7
WN B1246.1+5836 Gaia DR3 1578013182604935168 Gaia DR1 1578013178309867008 Gaia DR2 1578013182604935168

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