Cyg X-1

Query : Cyg X-1
C.D.S. - SIMBAD4 rel 1.5.12 - 2018.02.18CET21:04:22

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


Basic data :
HD 226868 -- 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:
* (AG,ALS,...), X (3A,2E,...), gam (1FGL,INTEGRAL1,...), SB* (SBC7,SBC9), V* (V*,AAVSO), BH? (Ref), El* (Ref), HXB (Ref), *iA ([MJD95]), Ae* (Ref), s*b (Ref), IR (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] : 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) :
19 58 21.67595 +35 12 05.7783 (Optical) [ 7.56 6.59 89 ] A 2007A&A...474..653V
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
FK5 coord. (ep=J2000 eq=2000) :
19 58 21.676 +35 12 05.78 [ 7.56 6.59 89 ]
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) :
19 56 28.88 +35 03 54.8 [ 43.66 38.08 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] : 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) :
071.3350 +03.0668 [ 7.56 6.59 89 ]
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 :
-3.37 -7.15 [0.75 0.86 0] A 2007A&A...474..653V
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) -2.70 [3.2] / z(~) -0.000009 [0.000011] / cz -2.70 [3.20]
   C 2006AstL...32..759G
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):
0.538 [0.033] A 2011ApJ...742...83R
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:
O9.7Iabpvar C 2011ApJS..193...24S
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) :
U 9.38 [~] C 1973LicOB..24....1B
B 9.72 [~] C 2002yCat.2237....0D
V 8.91 [~] C 2002yCat.2237....0D
R 8.42 [0.06] E 2009yCat.1315....0Z
J 6.872 [0.023] C 2003yCat.2246....0C
H 6.652 [0.018] C 2003yCat.2246....0C
K 6.501 [0.020] C 2003yCat.2246....0C
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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!).

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (49) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

V* V1357 Cyg 1H 1956+350 PBC J1958.3+3512 UBV 17047
3A 1956+350 HD 226868 PPM 83929 UBV M 27507
AG+35 1910 H 1956+350 1RXS J195821.9+351156 uvby98 100226868
ALS 10678 H 1957+35 SAO 69181 WEB 17338
BD+34 3815 HIC 98298 SBC7 776 1XRS 19564+350
CGO 548 Hilt 849 SBC9 1193 X Cyg X-1
2E 4306 HIP 98298 SV* SVS 1808 [BM83] X1956+350
2E 1956.4+3503 INTEGRAL1 116 SWIFT J1958.4+3510 [KRL2007b] 370
1FGL J1958.9+3459 INTREF 1001 SWIFT J1958.3+3512 [MJD95] J195821.72+351205.9
GCRV 12319 LS II +35 8 TYC 2678-791-1 AAVSO 1954+34
GEN# +1.00226868 1M 1956+350 2U 1956+35
GOS G071.34+03.07 01 2MASS J19582166+3512057 3U 1956+35
GSC 02678-00791 MCW 770 4U 1956+35

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References (2327 between 1998 and 2018) (Total 3680)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

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Measurements (10 types) :


distance : 1    herschel : 10    ISO : 6    IUE : 54    MK : 4    oRV : 3    PLX : 3    PM : 2    velocities : 5    XMM : 12   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : Cyg X-1

Link by name to the catalogue in VizieR :

V* V1357 Cyg AG+35 1910 ALS 10678 BD+34 3815 2E 4306
GSC 02678-00791 HD 226868 HIC 98298 HIP 98298 LS II +35 8
2MASS J19582166+3512057 PPM 83929 1RXS J195821.9+351156 SAO 69181 TYC 2678-791-1
uvby98 100226868

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2018.02.18-21:04:22

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