2FGL J0045.3+2127

Query : 2FGL J0045.3+2127

Basic data :
2FGL J0045.3+2127 -- 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:
BLL (2010ApJ,[NBK96],...), Rad (BWE,CLASS,...), gam (1FGL,2FGL,...), Bla (2017A&A,RBPL,...), Bz? (2019A&A,3HSP,...), X (2009A&A,RX,...), * (USNO,Gaia), MIR (WISEA,WISE), Opt (LAMOST,SDSS), QSO (2020ApJS), AGN (2011ApJ), BL? (2021MNRAS), G (2021AJ), UV (GALEX), 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) :
00 45 19.2982391160 +21 27 40.001545080 (Optical) [ 0.0569 0.0297 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) :
00 42 40.5627848883 +21 11 16.258029156 [ 0.0569 0.0297 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) :
121.0350288241788 -41.3881079825412 [ 0.0569 0.0297 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 :
-0.038 -0.044 [0.077 0.056 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) 242278 [~] / z(spectroscopic) 2.070000 [~] / cz 620570.39 [~]
   (Opt) D 2020ApJS..250....8L
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas):
0.2039 [0.0647] A 2020yCat.1350....0G
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 (13) :
U (AB) 17.37 [0.07] D 2007ApJS..173..471M
B (AB) 17.33 [0.07] D 2007ApJS..173..471M
V (AB) 17.01 [0.01] D 2007ApJS..173..471M
R 17.3 [0.35] D 1998USNO2.C......0M
G 16.779131 [0.007637] C 2020yCat.1350....0G
J 15.30 [0.05] C 2003yCat.2246....0C
H 14.63 [0.05] C 2003yCat.2246....0C
K 14.00 [0.06] C 2003yCat.2246....0C
u (AB) 17.4165 [0.0180] C 2020ApJS..250....8L
g (AB) 17.1211 [0.0235] C 2020ApJS..250....8L
r (AB) 16.7969 [0.0150] C 2020ApJS..250....8L
i (AB) 16.6136 [0.0136] C 2020ApJS..250....8L
z (AB) 16.4069 [0.0216] C 2020ApJS..250....8L
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!).
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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 (47) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

2MASS J00451930+2127401 GB6 B0042+2111 1RXS J004519.6+212735 [MGL2009] BZB J0045+2127
BWE 0042+2111 87GB 004239.8+211104 SDSS J004519.30+212739.9 [MML2015] 5BZB J0045+2127
CLASS J004519.3008+212740.054 GLEAM J004518+212733 TGSSADR J004519.3+212743 [NBK96] J00453+2127
1FGL J0045.3+2127 3HSP J004519.3+212740 TIC 435854369 [VV2000b] J004519.1+212743
2FGL J0045.3+2127 IERS B0042+211 USNO-A2.0 1050-00219232 [VV2003b] J004519.1+212743
3FGL J0045.3+2126 IVS B0042+211 2WHSP J004519.2+212739 [VV2006b] J004519.1+212743
4FGL J0045.3+2128 LAMOST J004519.30+212739.9 WISEA J004519.29+212740.0 [VV2010b] J004519.1+212743
1FHL J0045.2+2126 NVSS J004519+212742 WISE J004519.28+212740.1 [VV98b] J004519.1+212743
2FHL J0045.2+2127 RBPL J0045+2127 WISE J004519.29+212740.0 [ZEH2003] RX J0045.3+2127 1
3FHL J0045.3+2127 RGB J0045+214 9Y-MST J0045+2127 Gaia DR3 2801767455360573696
GALEX J004519.2+212740 RX J0045.3+2127 [BSF97] J004519.6+212743 Gaia DR2 2801767455360573696
GB6 J0045+2127 RX J0045.2+2127 [DGT2001] J0045+214

References (76 between 1850 and 2024) (Total 76)
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 : 1    PLX : 2    PM : 2   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : 2FGL J0045.3+2127

Link by name to the catalogue in VizieR :

2MASS J00451930+2127401 BWE 0042+2111 GALEX J004519.2+212740 IERS B0042+211 NVSS J004519+212742
1RXS J004519.6+212735 SDSS J004519.30+212739.9 USNO-A2.0 1050-00219232 WISEA J004519.29+212740.0 WISE J004519.28+212740.1
WISE J004519.29+212740.0 Gaia DR3 2801767455360573696 Gaia DR2 2801767455360573696

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