First estimate of the time delay in HE 1104-1805

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First estimate of the time delay in HE 1104-1805. / Wisotzki, Lutz; Wucknitz, Olaf; Lopez, Sebastian; Sørensen, Anton Norup.

In: Astronomy and Astrophysics, Vol. 339, No. 3, 20.11.1998, p. L73-L76.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Wisotzki, L, Wucknitz, O, Lopez, S & Sørensen, AN 1998, 'First estimate of the time delay in HE 1104-1805', Astronomy and Astrophysics, vol. 339, no. 3, pp. L73-L76.

APA

Wisotzki, L., Wucknitz, O., Lopez, S., & Sørensen, A. N. (1998). First estimate of the time delay in HE 1104-1805. Astronomy and Astrophysics, 339(3), L73-L76.

Vancouver

Wisotzki L, Wucknitz O, Lopez S, Sørensen AN. First estimate of the time delay in HE 1104-1805. Astronomy and Astrophysics. 1998 Nov 20;339(3):L73-L76.

Author

Wisotzki, Lutz ; Wucknitz, Olaf ; Lopez, Sebastian ; Sørensen, Anton Norup. / First estimate of the time delay in HE 1104-1805. In: Astronomy and Astrophysics. 1998 ; Vol. 339, No. 3. pp. L73-L76.

Bibtex

@article{a3b030ca3b5943f286c447701ee00241,
title = "First estimate of the time delay in HE 1104-1805",
abstract = "We present first results from five years of spectrophotometric monitoring of the bright double QSO and gravitational lens HE 1104-1805. The quasar has varied considerably over this time, while the emission line fluxes appear to have remained constant. We have constructed monochromatic continuum light curves for components A and B, finding that B leads the variability. A quantitative analysis with the Pelt method gives a best estimate for the light travel time delay of about 0.73 years, although a value as low as 0.3 cannot yet be excluded. We discuss possible models for the QSO-lens configuration and use our measured time delay to predict the redshift of the lens, zd. Finding that most likely zd ≲ 1, we can rule out the hitherto favoured values of zd = 1.32 or 1.66. A new candidate is an absorption system at z = 0.73, but the lens could also be an elliptical not detected in absorption.",
keywords = "Gravitational lensing, Quasars: general, Quasars: individual: HE 1104-1805",
author = "Lutz Wisotzki and Olaf Wucknitz and Sebastian Lopez and S{\o}rensen, {Anton Norup}",
year = "1998",
month = nov,
day = "20",
language = "English",
volume = "339",
pages = "L73--L76",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "E D P Sciences",
number = "3",

}

RIS

TY - JOUR

T1 - First estimate of the time delay in HE 1104-1805

AU - Wisotzki, Lutz

AU - Wucknitz, Olaf

AU - Lopez, Sebastian

AU - Sørensen, Anton Norup

PY - 1998/11/20

Y1 - 1998/11/20

N2 - We present first results from five years of spectrophotometric monitoring of the bright double QSO and gravitational lens HE 1104-1805. The quasar has varied considerably over this time, while the emission line fluxes appear to have remained constant. We have constructed monochromatic continuum light curves for components A and B, finding that B leads the variability. A quantitative analysis with the Pelt method gives a best estimate for the light travel time delay of about 0.73 years, although a value as low as 0.3 cannot yet be excluded. We discuss possible models for the QSO-lens configuration and use our measured time delay to predict the redshift of the lens, zd. Finding that most likely zd ≲ 1, we can rule out the hitherto favoured values of zd = 1.32 or 1.66. A new candidate is an absorption system at z = 0.73, but the lens could also be an elliptical not detected in absorption.

AB - We present first results from five years of spectrophotometric monitoring of the bright double QSO and gravitational lens HE 1104-1805. The quasar has varied considerably over this time, while the emission line fluxes appear to have remained constant. We have constructed monochromatic continuum light curves for components A and B, finding that B leads the variability. A quantitative analysis with the Pelt method gives a best estimate for the light travel time delay of about 0.73 years, although a value as low as 0.3 cannot yet be excluded. We discuss possible models for the QSO-lens configuration and use our measured time delay to predict the redshift of the lens, zd. Finding that most likely zd ≲ 1, we can rule out the hitherto favoured values of zd = 1.32 or 1.66. A new candidate is an absorption system at z = 0.73, but the lens could also be an elliptical not detected in absorption.

KW - Gravitational lensing

KW - Quasars: general

KW - Quasars: individual: HE 1104-1805

UR - http://www.scopus.com/inward/record.url?scp=0002750813&partnerID=8YFLogxK

M3 - Journal article

AN - SCOPUS:0002750813

VL - 339

SP - L73-L76

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

IS - 3

ER -

ID: 235848675