2017MNRAS.468.1568D

Query : 2017MNRAS.468.1568D

2017MNRAS.468.1568D - Mon. Not. R. Astron. Soc., 468, 1568-1574 (2017/June-3)

Modelling long-range wavelength distortions in quasar absorption echelle spectra.

DUMONT V. and WEBB J.K.

Abstract (from CDS):

Spectra observed with the Ultraviolet and Visual Echelle Spectrograph on the European Southern Observatory's VLT exhibit long-range wavelength distortions. These distortions impose a systematic error on high-precision measurements of the fine-structure constant, α, derived from intervening quasar absorption systems. If the distortion is modelled using a model that is too simplistic, the resulting bias in Δα/α away from the true value can be larger than the statistical uncertainty on the α measurement. If the effect is ignored altogether, the same is true. If the effect is modelled properly, accounting for the way in which final spectra are generally formed from the co-addition of exposures made at several different instrumental settings, the effect can be accurately removed and the correct Δα/α recovered.

Journal keyword(s): methods: data analysis - techniques: spectroscopic - quasars: absorption lines - cosmological parameters - cosmological parameters

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 - 2026	#notes
1	QSO J0430-4855	QSO	04 30 37.3003527936	-48 55 23.577559068	15.17	16.19	16.09			~	17	0

Query : 2017MNRAS.468.1568D

Basic data :

QSO J0430-4855 -- Quasar

QSO (2010A&A,QSO,...), AGN (2015MNRAS), * (Gaia), NIR (2MASS)

04 30 37.3003527936 -48 55 23.577559068 (Optical) [ 0.0250 0.0291 90 ] A 2020yCat.1350....0G

04 29 14.5154152824 -49 01 47.581799113 [ 0.0250 0.0291 90 ]

255.7896478479090 -42.9106157073180 [ 0.0250 0.0291 90 ]

-0.006 0.013 [0.029 0.036 90] A 2020yCat.1350....0G

V(km/s) 237618 [5996] / z(~) 1.940000 [0.020000] / cz 581597.37 [5995.85] D 1995RMxAA..31..159M

U 15.17 [~] D 2015MNRAS.453.1879K

B 16.19 [~] D 2015MNRAS.453.1879K

V 16.09 [~] D 2015MNRAS.453.1879K

G 15.834169 [0.003441] C 2020yCat.1350....0G

J 14.853 [0.050] C 2003yCat.2246....0C

H 14.652 [0.058] C 2003yCat.2246....0C

K 13.795 [0.052] C 2003yCat.2246....0C

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`QSO J0430-4855`	`EC 04292-4901`	`TIC 259318603`	`[VV2010] J043037.2-485523`
`CTQ 512`	`2MASS J04303730-4855237`	`[VV2000] J043037.2-485523`	`[VV98] J043037.2-485523`
`CTS G30.01`	`QSO B0429-4901`	`[VV2003] J043037.2-485523`	`Gaia DR2 4787832939454577536`
`CTS 512`	`SQUAD DR1 J043037-485523`	`[VV2006] J043037.2-485523`	`Gaia DR3 4787832939454577536`

References (17 between 1850 and 2026) (Total 17)
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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Data at NED - NASA/IPAC Extragalactic Database : QSO J0430-4855

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2MASS J04303730-4855237 Gaia DR2 4787832939454577536 Gaia DR3 4787832939454577536

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