4C 15.54

Basic data :
4C 15.54 -- BL Lac 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 (2014ApJS,4C,...), gam (2EG,3EG,...), BLL (2010A&A,[VV2000b],...), Bla ([IN88],[MGL2009],...), QSO (2016A&A,QSO,...), AGN (2011ApJ,[SRC2012b]), G (2022ApJS,LEDA), X (2009A&A,2E), MIR (WISEA,WISE), Bz? (2022ApJS), * (Gaia), NIR (2MASS) 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) : 16 07 06.43046256 +15 51 34.4855829 (Radio) [ 0.0877284 0.1518 0 ] A 2020A&A...644A.159C 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) : 16 04 49.40787515 +15 59 32.8037005 [ 0.0877284 0.1518 0 ] 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) : 029.37850427460 +43.40904034424 [ 0.0877284 0.1518 0 ] 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 : -0.147 -0.445 [0.271 0.266 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) 114622 [~] / z(emission) 0.496 [~] / cz 148697 [~]    (Opt) D 2012ApJ...748...49S 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): 0.4596 [0.273] A 2020yCat.1350....0G 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 20.15 [~] D 2010A&A...518A..10V V 19.49 [~] D 2010A&A...518A..10V R 17.5 [~] E 2009A&A...495..691M G 19.260620 [0.020059] C 2020yCat.1350....0G J 16.556 [0.128] D 2011NewA...16..503M H 15.935 [0.160] D 2011NewA...16..503M K 15.024 [15.024] D 2011NewA...16..503M	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: Another likely optical counterpart for 3EG J1605+1553 is VIPS J16036+1554 (Taylor et al., 2007ApJ...671.1355T) See also Specfind radio flux densities.

4C 15.54	FIRST J160706.4+155134	PKS 1604+159	9Y-MST J1607+1550
BWE 1604+1559	87GB 160450.7+155905	PKS J1607+1551	[HB93] 1604+159
CLASS J160706.4275+155134.494	GLEAM J160706+155134	QSO B1604+159	[IN88] 1604+159
CRATES J160707+155113	ICRF J160706.4+155134	S3 1604+15	[MGL2009] BZB J1607+1551
Cul 1604+159	IERS B1604+159	TGSSADR J160706.5+155133	[MML2015] 5BZB J1607+1551
2E 3592	INTREF 672	TIC 172746687	[SRC2012b] J1607+1551
2E 1604.8+1559	IVS B1604+159	TXS 1604+159	[VV2000b] J160706.4+155134
2EG J1605+1558	JVAS J1607+1551	VCS1 J1607+1551	[VV2003b] J160706.4+155134
3EG J1605+1553	LEDA 2819308	VIPS J16071+1551	[VV2006b] J160706.4+155134
EGR J1607+1533	2MASS J16070642+1551344	VLSSr J160706.6+155132	[VV2010b] J160706.4+155134
1FGL J1607.1+1552	MC3 1604+15.9	VLSS J1607.1+1551	[VV98b] J160706.4+155134
2FGL J1607.0+1552	MRC 1604+159	WB 1604+1559	Gaia DR3 1198384631085820032
3FGL J1607.0+1551	NRAO 1604+15	WISEA J160706.43+155134.7	Gaia DR1 1198384626788950912
4FGL J1607.0+1550	NVSS J160706+155134	WISE J160706.43+155134.8	Gaia DR2 1198384631085820032
3FHL J1607.0+1550	OHIO S 108.2	WISE J160706.43+155134.7

References (168 between 1850 and 2024) (Total 168) 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 :

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

Data at NED - NASA/IPAC Extragalactic Database : 4C 15.54

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