Mrk 957

Query : Mrk 957

Basic data :
Mrk 957 -- 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: 		X (2011A&A,C84,...), AGN (2011A&A,[HB91],...), G (2016A&A,Mrk,...), Rad (5C,NVSS,...), IR (IRAS,ISOSS,...), * (USNO,Gaia), Sy1 (2012ApJ), QSO (QSO), gam (INTREF), NIR (2MASS), Opt (LAMOST)
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 41 53.4322147944 +40 21 17.647820820 (Optical) [ 0.1853 0.1427 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 39 09.7351799595 +40 04 51.231511277 [ 0.1853 0.1427 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) : 		120.9636345991943 -22.4803549461468 [ 0.1853 0.1427 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 : 		-0.132 -0.247 [0.210 0.160 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) 20559 [~] / z(~) 0.0711 [~] / cz 21315 [~]
   D 2004A&A...422...39S
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin): 		0.277 0.243 80 (NIR) C 2006AJ....131.1163S
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 15.94 [~] D 2010A&A...518A..10V
V 15.14 [~] D 2010A&A...518A..10V
G 18.412346 [0.008567] C 2020yCat.1350....0G
J 12.968 [0.046] C 2006AJ....131.1163S
H 12.177 [0.056] C 2006AJ....131.1163S
K 11.657 [0.050] C 2006AJ....131.1163S
u (AB) 16.758699 [~] D 2018MNRAS.474.1873W
g (AB) 15.665970 [~] D 2018MNRAS.474.1873W
r (AB) 15.066950 [~] D 2018MNRAS.474.1873W
i (AB) 14.596610 [~] D 2018MNRAS.474.1873W
z (AB) 14.298060 [~] D 2018MNRAS.474.1873W
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 ) :

: 1 : 19218 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (45) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

Mrk 957 LAMOST J004153.35+402119.4 TGSSADR J004153.3+402118 [SLK2004] 96
AKARI -FIS-V2 J0041533+402120 LAMOST J004153.28+402118.4 TIC 258977029 [SPH2011] 745
5C 3.100 LEDA 2506 USNO-B1.0 1303-00012326 [VV2000c] J004153.4+402117
C84 9 2MASS J00415342+4021176 WN B0039.1+4004 [VV2003c] J004153.4+402117
CGPG 0039.2+4005 2MASX J00415339+4021174 WSTB 36W174 [VV2006c] J004153.4+402117
2E 131 NVSS J004153+402116 2XMM J004153.4+402117 [VV2010c] J004153.4+402117
2E 0039.1+4004 QSO B0039+4004 XMMM31 J004153.4+402118 [VV98c] J004153.4+402117
INTREF 22 RX J004153.1+402117 [DML87] 567 Gaia DR3 369123680003054080
IRAS F00391+4004 RX J0041.8+4021 [HB91] 0039+400A Gaia DR2 369123680003054080
IRAS 00391+4004 RX J0041.9+4021 [KPM2002] G120.9640-22.4806
ISOSS J00418+4020 1RXS J004154.0+402118 [SHL2001] 127
LAMOST J004153.39+402117.2 TF 11 [SHP97] 134

References (103 between 1850 and 2024) (Total 103)
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 : 8    PM : 2   

   

Observing logs


ISO : 3    IUE : 2   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : Mrk 957

Link by name to the catalogue in VizieR :

2E 131 IRAS F00391+4004 IRAS 00391+4004 2MASS J00415342+4021176 2MASX J00415339+4021174
NVSS J004153+402116 1RXS J004154.0+402118 USNO-B1.0 1303-00012326 WN B0039.1+4004 [DML87] 567
Gaia DR3 369123680003054080 Gaia DR2 369123680003054080

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