2004A&A...422..523P


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET21:36:06

2004A&A...422..523P - Astronomy and Astrophysics, volume 422, 523-526 (2004/8-1)

The ratio of the C IVλλ1548,1550 rest-wavelengths from high-redshift QSO absorption lines.

PETITJEAN P. and ARACIL B.

Abstract (from CDS):

We use very high quality VLT-UVES quasar spectra obtained in the course of the ESO Large Programme ``Cosmic evolution of the Intergalactic Medium", to show that the ratio of the C IV doublet rest-wavelengths published in the literature and widely used is not consistent with high-redshift observations. From the analysis of 106 C IV systems we obtain: λ21=1.00166228±0.13x10–6. A similar analysis on 28 Si IV systems shows that the observed ratio is consistent with the well known Si IVλλ1393,1402 wavelengths. Using Si IV lines to calibrate the C IV lines in 11 systems, we find λ1,2=1548.2049 and 1550.7785±0.0012Å which is consistent with the Griesmann & Kling (2000ApJ...536L.113G) laboratory wavelengths. The precision on the doublet ratio is better because of the large number of C IV systems available for the measurement. This shows that it is possible to perform atomic physics measurements using high redshift astrophysical data.

Abstract Copyright:

Journal keyword(s): cosmology: observations - galaxies: intergalactic medium - galaxies: halos - galaxies: quasars: absorption lines

Simbad objects: 1

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Number of rows : 1

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 QSO J0831+5245 QSO 08 31 41.7095363198 +52 45 17.620340544   19.2   14.5 13.9 ~ 496 1

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET21:36:06

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


Basic data :
QSO J0831+5245 -- Quasar
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:
QSO (2010A&A,QSO,...), IR (IRAS,2MASS,...), smm (JCMTSE,JCMTSF), X (2XMM,3XMM), * (Gaia), LeQ (2007ApJ), Rad (FIRST)
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) :
08 31 41.7095363198 +52 45 17.620340544 (Optical) [ 0.8179 1.1544 90 ] C 2018yCat.1345....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) :
08 27 58.0062371090 +52 55 27.016492596 [ 0.8179 1.1544 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) :
165.7547127261635 +36.2405172545121 [ 0.8179 1.1544 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) 275922 [~] / z(emission) 3.911 [~] / cz 1172488 [~]
   (Opt) C 2017AJ....154..114O
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 (12) :
B 19.2 [~] E ~
R 14.5 [~] D 2004MNRAS.348..857H
G 15.9716 [0.0111] C 2018yCat.1345....0G
I 13.9 [~] D 2004MNRAS.348..857H
J 13.410 [0.027] C 2003yCat.2246....0C
H 12.661 [0.026] C 2003yCat.2246....0C
K 12.050 [0.023] C 2003yCat.2246....0C
u (AB) 24.237 [1.062] D 2009yCat.2294....0A
g (AB) 17.310 [0.005] B 2009yCat.2294....0A
r (AB) 15.387 [0.003] B 2009yCat.2294....0A
i (AB) 14.864 [0.003] B 2009yCat.2294....0A
z (AB) 14.639 [0.005] B 2009yCat.2294....0A
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Some important notes on this object about identifications and objects associations.
notes:



The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (22) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO J0831+5245 2MASS J08314169+5245174 SDSS J083141.70+524517.5 [VV2003] J083141.6+524518
FIRST J083141.6+524517 NAME APM 08279+5255 TIC 71213405 [VV2006] J083141.6+524518
IRAS F08279+5255 NAME APM 0827+525 WISEA J083141.69+524517.5 [VV2010] J083141.6+524518
JCMTSE J083141.9+524518 QSO B0827+529 2XMM J083141.6+524517 Gaia DR2 1028742871820206336
JCMTSF J083141.3+524518 QSO B0827+5255 3XMM J083141.7+524517
KODIAQ J083141+524517 QSO B0827.9+5255 [VV2000] J083141.6+524518

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References (496 between 1850 and 2021) (Total 496)
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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Collections of Measurements


velocities : 2   

   

Observing logs


XMM : 2    herschel : 9   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : QSO J0831+5245

Link by name to the catalogue in VizieR :

FIRST J083141.6+524517 IRAS F08279+5255 2MASS J08314169+5245174 SDSS J083141.70+524517.5 WISEA J083141.69+524517.5
Gaia DR2 1028742871820206336

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