3C 452

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Basic data :
3C 452 -- Seyfert 2 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 (3C,ASB,...), AGN ([HB91],[VV2000c],...), G (LEDA,2MASX), X (PBC,SWIFT), Sy2 (Ref), QSO (QSO) 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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options), position angle (in degrees North to East of the specified coordinate frame) 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 45 48.787 +39 41 15.36 (Infrared) [ ] B 2006AJ....131.1163S 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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options), position angle (in degrees North to East of the specified coordinate frame) 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 43 32.82 +39 25 26.9 [ ] 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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options), position angle (in degrees North to East of the specified coordinate frame) 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) : 098.1313 -17.0586 [ ] 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) 23326 [25] / z(~) 0.081086 [0.000083] / cz 24308.97 [24.88]    D 2002LEDA.........0P 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 ~ 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) (incl) : inclination (in units of 15° from 0 to 7) (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): 0.380 0.251 75 (IR) 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 (5) : B 17.60 [~] D 2010A&A...518A..10V V 16.56 [~] D 2010A&A...518A..10V J 13.351 [0.056] C 2006AJ....131.1163S H 12.965 [0.092] C 2006AJ....131.1163S K 12.388 [0.101] C 2006AJ....131.1163S	SIMBAD with radius arcmin Interactive AladinLite view 2MASS DSS SDSSXMMIRACIRISGALEX VizieR photometry viewer    within radius 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!).

3C 452	DB 122	OHIO A 584	VLSS J2245.7+3940
ASB 76	GB6 B2243+3925	OHIO Y 372	WB 2243+3925
B2 2243+39	87GB 224331.7+392521	PBC J2245.8+3939	WN B2243.5+3925C
B2.3 2243+39	GRA B2243+39	QSO B2243+394	[HB91] 2243+394
B3 2243+394A	GRA J2245+39	S3 2243+39	[VV2000c] J224548.8+394115
BWE 2243+3925	1Jy 2243+394	S4 2243+394	[VV2003c] J224548.8+394115
3C 452.0	1Jy 2243+39	S4 2243+39	[VV2006c] J224548.8+394115
4C 39.71	LEDA 69671	SWIFT J2245.8+3941	[VV2010c] J224548.8+394115
3CR 452	2MASX J22454878+3941153	SWIFT J2246.0+3941	[VV98c] J224548.8+394115
CTA 103	MITG J2245+3941	SWIFT J2245.7+3941	[W72] 2243+39
DA 584	NRAO 697	SWIFT J2245.5+3941

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References (178 between 1998 and 2018) (Total 319) 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

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