2MAXI J2042+751

Query : 2MAXI J2042+751

Basic data :
ICRF J204237.3+750802 -- Seyfert 1 Galaxy
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,ICRF,...), QSO (2008ApJS,QSO,...), X (2012ApJS,2MAXI,...), rG (2012ApJ,[LCF2001]), Sy1 (2013ApJS), AGN (CGRaBS), G (LEDA), * (Gaia), gam (INTREF), UV (KUV), NIR (2MASS), Opt (SDSS)
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) : 		20 42 37.3079247456 +75 08 02.445851940 (Optical) [ 0.0156 0.0158 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) : 		20 43 13.0148272605 +74 57 08.637845940 [ 0.0156 0.0158 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) : 		108.9978584513893 +19.5265365856228 [ 0.0156 0.0158 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 : 		0.015 -0.049 [0.022 0.021 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) 29832 [150] / z(emission) 0.10499406 [0.0005] / cz 31476.4273 [150]
   (Opt) C 2022ApJS..261....2K
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) :
V 14.46 [~] E ~
R 13.80 [~] D 2008ApJS..175...97H
G 14.301549 [0.003544] C 2020yCat.1350....0G
J 12.503 [0.028] C 2003yCat.2246....0C
H 11.667 [0.031] C 2003yCat.2246....0C
K 10.514 [0.022] C 2003yCat.2246....0C
u (AB) 15.330 [0.004] C 2009ApJS..182..543A
g (AB) 14.874 [0.003] C 2009ApJS..182..543A
r (AB) 14.445 [0.003] C 2009ApJS..182..543A
i (AB) 13.568 [0.003] C 2009ApJS..182..543A
z (AB) 13.777 [0.004] C 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

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

The count displayed here is the number of children objects.
The list obtained by clicking the button may be larger, as some children may be linked with different references or probability.

%This number is the number of distinct objets linked, by using this button, you will obtain all links (may be more than one) from that object to his children

: 3 		Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (44) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

ICRF J204237.3+750802 INTREF 1036 S5 2043+749 [HB93] 2043+749
BWE 2043+7457 KNOWS J204240+750802 SDSS J204237.30+750802.4 [KRL2007b] 377
4C 74.26 KUV 20432+7457 SWIFT J2043.0+7504 [LCF2001] J2042+751
CGRaBS J2042+7508 LEDA 2821908 SWIFT J2042.3+7507 [VV2000] J204237.3+750802
CLASS J204237.3218+750802.436 2MASS J20423730+7508024 SWIFT J2042.7+7508 [VV2003] J204237.3+750802
CRATES J204235+750801 2MAXI J2042+751 SWIFT J2042.9+7507 [VV2006] J204237.3+750802
EF B2043+7455 MAXI J2041+750 TGSSADR J204237.5+750800 [VV2010] J204237.3+750802
GB3 2043+749 NVSS J204237+750802 TIC 372687390 [VV96] J204237.3+750802
GB6 J2042+7508 PBC J2042.6+7508 2XMM J204237.2+750802 [VV98] J204237.3+750802
87GB 204308.7+745733 QSO J2042+7508 XSS J20404+7521 Gaia DR2 2277830824488948608
IERS B2043+749 RFC J2042+7508 [BAG2012] 310.7268+75.1344 Gaia DR3 2277830824488948608

References (257 between 1850 and 2024) (Total 257)
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


velocities : 8    PM : 2   

   

Observing logs


ISO : 5    XMM : 1   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : ICRF J204237.3+750802

Link by name to the catalogue in VizieR :

BWE 2043+7457 4C 74.26 IERS B2043+749 2MASS J20423730+7508024 NVSS J204237+750802
SDSS J204237.30+750802.4 Gaia DR2 2277830824488948608 Gaia DR3 2277830824488948608

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