MR 2251-178

Basic data :
NAME MR 2251-178 -- 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 (2A,3A,...), QSO (2013ApJS,QSO,...), G (2016A&A,6dFGS,...), Rad (GLEAM,NVSS,...), Sy1 (2013ApJS), MIR (WISEA,WISE), IR (IRAS,2MASSI), AG? (2012ApJ), V* (2018AJ), * (Gaia), BH? ([KB2007]), gam (INTREF), NIR (2MASS), Opt (ATO) 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) : 22 54 05.8858611984 -17 34 55.402233708 (Optical) [ 0.0210 0.0191 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) : 22 51 25.9431252150 -17 50 54.952427762 [ 0.0210 0.0191 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) : 046.1973974820980 -61.3256117571068 [ 0.0210 0.0191 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 : -0.025 0.089 [0.027 0.024 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) 18715 [150] / z(emission) 0.06450101 [0.0005] / cz 19336.9163 [150]    (Opt) C 2022ApJS..261....2K 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): 0.0009 [0.025] A 2020yCat.1350....0G Syntax of morphological type is : mtype quality bibcode mtype : Hubble morphological class (spirals, ellipticals, etc) quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the morphological type reference Morphological type: E D 2012AstL...38..475K 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): 0.247 0.207 50 (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 (7) : B 14.99 [~] D 2010A&A...518A..10V V 14.36 [~] D 2010A&A...518A..10V R 15.12 [~] D 2009MNRAS.399..683J G 14.059732 [0.007914] C 2020yCat.1350....0G J 12.536 [0.026] C 2006AJ....131.1163S H 11.889 [0.039] C 2006AJ....131.1163S K 11.131 [0.029] C 2006AJ....131.1163S	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 points in this preview 2MASS DSS SDSSXMMIRACIRISGALEX All (CDSPortal) Send to 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!).
Some important notes on this object about identifications and objects associations. notes: see also ClG 2251-17 MRC 2251-178 doesn't exist not 1E 2251.1-1751

NAME MR 2251-178	IRAS F22514-1750	QSO B2251-178	[KB2007] J225405.8-173455.0
2A 2251-179	LEDA 3970981	RBS 1913	[VV2000] J225405.9-173455
3A 2248-185	2MASS J22540589-1734553	1RXS J225406.7-173451	[VV2003] J225405.9-173455
ATO J343.5245-17.5820	2MASSI J2254058-173455	SWIFT J2254.0-1732	[VV2006] J225405.9-173455
1AXG J225406-1734	2MASX J22540585-1734555	SWIFT J2254.1-1734	[VV2010] J225405.9-173455
6dFGS gJ225405.9-173455	2MAXI J2254-174	SWIFT J2254.0-1734	[VV96] J225405.9-173455
2E 4645	MAXI J2253-177	TIC 111750307	[VV98] J225405.9-173455
2E 2251.4-1750	NVSS J225405-173455	WISEA J225405.88-173455.3	Gaia DR2 2403142297848977920
1ES 2251-17.8	PBC J2254.0-1734	WISE J225405.88-173455.1	Gaia DR3 2403142297848977920
GLEAM J225405-173452	QSO J2254-1734	WISH B2251.4-1750
1H 2251-179	QSO B2251-179	XSS J22539-1735
INTREF 1092	QSO B2251-1750	[BDW2002] q2251-1750

References (436 between 1850 and 2024) (Total 436) Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system). Follow new references on this object

Collections of Measurements

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : MR 2251-178

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