V* V1521 Cyg

Basic data :
V* V1521 Cyg -- High Mass X-ray Binary 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 (X,3A,...), Rad (ECX6,GB6,...), gam (2AGL,1FGL,...), HXB (2013ApJS), WR* (WR), HX? (2016ApJS), V* (V*), 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) : 20 32 25.78 +40 57 27.9 (Infrared) [ 60 60 90 ] C 2003yCat.2246....0C 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) : 20 30 37.63 +40 47 12.6 [ 60 60 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) : 079.84549 +00.70006 [ 60 60 90 ] Spectral type is made of 3 parts: %coding is composed of 4 parts : the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities; a quality letter: A=best quality→E=worst quality, {� } =unknown quality % a quality letter: A=best quality -> E=worst quality, {� } =unknown quality bibcode : bibcode of the spectral type reference Spectral type: WN4/5-6/7 C 1996A&A...314..521V 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 (3) : J 15.309 [0.059] C 2003yCat.2246....0C H 13.192 [0.057] C 2003yCat.2246....0C K 11.921 [0.031] C 2003yCat.2246....0C	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: Variable source (radio). 2013ApJ...762...85W.

X Cyg X-3	87GB 203037.0+404726	PBC J2032.4+4057	WR 145a
3A 2030+407	GPS 2030+407	RGB J2032+409	1XRS 20305+407
2AGL J2033+4100	GPSR 079.846+0.700	RX J2032.3+4057	[AAA2018] FGL J2032.1+4058
2E 4376	GT 2030+407	1RXS J203226.2+405725	[BM83] X2030+407
2E 2030.5+4047	1H 2030+407	SWIFT J2032.5+4055	[BSF97] J203225.77+405728.0
ECX6-23	H 2030+407	SWIFT J2032.4+4057	[FS2003] 1076
1ES 2030+40.7	INTEGRAL1 118	TIC 17032547	[KRL2007b] 376
1FGL J2032.4+4057	1M 2030+407	2U 2030+40	[WBC2013] J203225.6+405726
2FGL J2032.1+4049	2MASS J20322578+4057279	3U 2030+40
4FGL J2032.6+4053	18P 57	4U 2030+40
GB6 B2030+4047	19P 17	V* V1521 Cyg

References (1896 between 1850 and 2023) (Total 1896) 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 : V* V1521 Cyg

Link by name to the catalogue in VizieR :

Search by coordinates in Vizier (radius: 5 arcsec)

• The position of this object in the 7th WR catalogue is quitea bit off. Using the chart by Weekes & Geary (1982PASP...94..708W),the star is identifiable in 2MASS at:X Cyg X-3: 20 32 25.78 +40 57 27.9 (J2000, 2MASS)B. Skiff

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