NGC 3994

Basic data :
NGC 3994 -- LINER-type Active Galaxy Nucleus 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: G (2015ApJ,APG,...), Rad (B2,6C,...), AGN ([VV2000c],[VV2003c],...), GiG (K79,[CHM2007],...), GiP ([BGK2003],[T76]), LIN (2014ApJ), Q? (FBQS), AG? (2020MNRAS), IG (VV), * (Gaia), HI (2016A&A), IR (IRAS), 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) : 11 57 36.8662975416 +32 16 39.447161112 (Optical) [ 13.1005 29.7522 90 ] C 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) : 11 55 02.4323496304 +32 33 21.366579426 [ 13.1005 29.7522 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) : 185.9105749082502 +77.2412710824345 [ 13.1005 29.7522 90 ] 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) 3066 [3] / z(spectroscopic) 0.01028 [0.00001] / cz 3081.9 [3.0]    (Opt) C 2012ApJS..203...21A 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: Sbc C 2021A&A...648A..64K 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): 0.817 0.441 10 (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 13.51 [~] D 2010A&A...518A..10V V 12.87 [~] D 2010A&A...518A..10V G 18.744251 [0.044906] C 2020yCat.1350....0G J 10.757 [0.013] C 2006AJ....131.1163S H 10.038 [0.012] C 2006AJ....131.1163S K 9.719 [0.017] C 2006AJ....131.1163S u (AB) 15.149 [0.005] B 2012ApJS..203...21A g (AB) 13.597 [0.002] B 2012ApJS..203...21A r (AB) 12.678 [0.002] B 2012ApJS..203...21A i (AB) 12.222 [0.002] B 2012ApJS..203...21A z (AB) 11.907 [0.002] B 2012ApJS..203...21A	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 Specfind radio flux densities.

NGC 3994	GB6 B1155+3233	NVSS J115736+321639	[DC78] UGC 6936
APG 313	87GB 115506.6+323354	SDSS J115736.86+321639.4	[DC78] UGC 6944
Ark 337	IRAS F11551+3233	UGC 6936	[T76] 46B
B2.1 1155+32	IRAS F11550+3233	UZC J115736.9+321639	[VV2000c] J115736.7+321641
6C 115503+323501	IRAS 11550+3233	VV 249b	[VV2003c] J115736.7+321641
7C 115504.5+323404	K79 39B	WN B1155.0+3234B	[VV2006c] J115736.7+321641
7C 115503.20+323329.00	KUG 1155+325A	Z 1155.0+3233	[VV2010c] J115736.7+321641
7C 115508.40+323404.00	LEDA 37616	Z 186-74	[VV98c] J115736.7+321641
CASG 138	LJHY 26	[BGK2003] B115502.2+323319	[WGB2006] 115454+32360 c
ECO 3204	2MASX J11573685+3216400	[CAB95] IRAS F11550+3233	Gaia DR3 4027487835296775808
FBQS J1157+3216	MCG+06-26-059	[CHM2007] HDC 683 J115736.85+3216400
FIRST J115736.8+321638	MY 115503.2+321732.9	[CHM2007] LDC 852 J115736.85+3216400

References (196 between 1850 and 2024) (Total 196) 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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External archives :

Data at NED - NASA/IPAC Extragalactic Database : NGC 3994

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