Variability of the gravitational lens UM 673 in 2003-2005

E. A. Koptelova; B. P. Artamonov; V. V. Bruevich; O. A. Burkhonov; A. V. Sergeev

doi:10.1134/S1063772908040021

Variability of the gravitational lens UM 673 in 2003-2005

E. A. Koptelova, B. P. Artamonov, V. V. Bruevich, O. A. Burkhonov, A. V. Sergeev

Graduate Institute of Astronomy

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5 Scopus citations

Abstract

Results of VRI photometry of two components of the gravitationally lensed quasar UM 673 in 2003-2005 are presented. The observational data were obtained on the 1.5-m telescope of the Maidanak observatory. During the monitoring of the system, considerable brightness variations in components A and B with amplitudes of about 0.2^m were recorded, demonstrating variability of the quasar. The increase in the brightness of the components was accompanied by reddening of their V-R color indices. Analysis of the brightness and color variations of the components shows no variations related to microlensing.

Original language	English
Pages (from-to)	270-277
Number of pages	8
Journal	Astronomy Reports
Volume	52
Issue number	4
DOIs	https://doi.org/10.1134/S1063772908040021
State	Published - Apr 2008

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title = "Variability of the gravitational lens UM 673 in 2003-2005",

abstract = "Results of VRI photometry of two components of the gravitationally lensed quasar UM 673 in 2003-2005 are presented. The observational data were obtained on the 1.5-m telescope of the Maidanak observatory. During the monitoring of the system, considerable brightness variations in components A and B with amplitudes of about 0.2m were recorded, demonstrating variability of the quasar. The increase in the brightness of the components was accompanied by reddening of their V-R color indices. Analysis of the brightness and color variations of the components shows no variations related to microlensing.",

author = "Koptelova, {E. A.} and Artamonov, {B. P.} and Bruevich, {V. V.} and Burkhonov, {O. A.} and Sergeev, {A. V.}",

note = "Funding Information: This work was supported by a Presidential Grant of the Russian Federation for the Support of Young Russian Scientists and Their Supervisors (grant MK-2637.2006.2) and by the Russian Foundation for Basic Research (project code 06-02-16857).",

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volume = "52",

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TY - JOUR

T1 - Variability of the gravitational lens UM 673 in 2003-2005

AU - Koptelova, E. A.

AU - Artamonov, B. P.

AU - Bruevich, V. V.

AU - Burkhonov, O. A.

AU - Sergeev, A. V.

N1 - Funding Information: This work was supported by a Presidential Grant of the Russian Federation for the Support of Young Russian Scientists and Their Supervisors (grant MK-2637.2006.2) and by the Russian Foundation for Basic Research (project code 06-02-16857).

PY - 2008/4

Y1 - 2008/4

N2 - Results of VRI photometry of two components of the gravitationally lensed quasar UM 673 in 2003-2005 are presented. The observational data were obtained on the 1.5-m telescope of the Maidanak observatory. During the monitoring of the system, considerable brightness variations in components A and B with amplitudes of about 0.2m were recorded, demonstrating variability of the quasar. The increase in the brightness of the components was accompanied by reddening of their V-R color indices. Analysis of the brightness and color variations of the components shows no variations related to microlensing.

AB - Results of VRI photometry of two components of the gravitationally lensed quasar UM 673 in 2003-2005 are presented. The observational data were obtained on the 1.5-m telescope of the Maidanak observatory. During the monitoring of the system, considerable brightness variations in components A and B with amplitudes of about 0.2m were recorded, demonstrating variability of the quasar. The increase in the brightness of the components was accompanied by reddening of their V-R color indices. Analysis of the brightness and color variations of the components shows no variations related to microlensing.

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DO - 10.1134/S1063772908040021

M3 - 期刊論文

AN - SCOPUS:45349090771

VL - 52

SP - 270

EP - 277

JO - Astronomy Reports

JF - Astronomy Reports

SN - 1063-7729

IS - 4

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Variability of the gravitational lens UM 673 in 2003-2005

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