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Potential and sky coverage for off-axis fringe tracking in optical long baseline interferometry
Boskri, Abdelkarim1,2; Petrov, Romain G.2; El Halkouj, Thami1; Hadjara, Massinissa3,4,5; Leftley, James2; Benkhaldoun, Zouhair1; Cruzalebes, Pierre2; Ziad, Aziz2; Carbillet, Marcel2
2021-09-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume506Issue:1Pages:1364-1388
AbstractThe spectacular results provided by the second-generationVLTI instruments GRAVITY and MATISSE on active galactic nuclei (AGN) trigger and justify a strong increase in the sensitivity limit of optical interferometers. A key component of such an upgrade is off-axis fringe tracking. To evaluate its potential and limitations, we describe and analyse its error budget including fringe sensing precision and temporal, angular and chromatic perturbations of the piston. The global tracking error is computed using standard seeing parameters for different sites, seeing conditions and telescope sizes for the current GRAVITY Fringe Tracker (GFT) and a new concept of Hierarchical Fringe Tracker. Then, it is combined with a large catalogue of guide star candidates from Gaia to produce sky coverage maps that give the probability to find a usable off-axis guide star in any part of the observable sky. These maps can be used to set the specifications of the system, check its sensitivity to seeing conditions, and evaluate the feasibility of science programs. We check the availability of guide stars and the tracking accuracy for a large set of 15799 Quasars to confirm the feasibility of a large program on Broad Line Regions in the K band with the GFT and show how it can be extended to the L, M, and N bands. Another set of 331 well-characterized nearby AGNs shows the high potential of MATISSE for imaging and characterization of the dust torus in the N band under off-axis tracking on both Unit Telescopes and Auxiliary Telescopes.
Keywordatmospheric effects instrumentation: high angular resolution techniques: interferometric galaxies: active quasars: supermassive black holes
Funding OrganizationFrench government ; French government ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; French government ; French government ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; French government ; French government ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; French government ; French government ; Chinese Academy of Sciences ; Chinese Academy of Sciences
DOI10.1093/mnras/stab1505
WOS KeywordISOPISTONIC ANGLE ; STATISTICS ; PHASE ; AMBER
Language英语
Funding ProjectFrench government[ANR-15-IDEX-01] ; Chinese Academy of Sciences
Funding OrganizationFrench government ; French government ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; French government ; French government ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; French government ; French government ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; French government ; French government ; Chinese Academy of Sciences ; Chinese Academy of Sciences
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000703918800090
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75118
Collection中国科学院国家天文台
Corresponding AuthorBoskri, Abdelkarim; Petrov, Romain G.
Affiliation1.Cadi Ayyad Univ FSSM, Oukaimeden Observ, LPHEA Lab, BP 2390, Marrakech, Morocco
2.Univ Cote dAzur, Observ Cote dAzur, Lab Lagrange, CNRS, Parc Valrose,Bat H Fizeau, F-06108 Nice, France
3.Chinese Acad Sci, Natl Astron Observ, CAS, South Amer Ctr Astron, Beijing 100101, Peoples R China
4.Univ Chile, Dept Astron, Casilla 36-D, Santiago 7550000, Chile
5.Ctr Rech Astron Astrophys & Geophys CRAAG, Route Observ,BP 63, Bouzareah 16340, Alger, Algeria
Recommended Citation
GB/T 7714
Boskri, Abdelkarim,Petrov, Romain G.,El Halkouj, Thami,et al. Potential and sky coverage for off-axis fringe tracking in optical long baseline interferometry[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,506(1):1364-1388.
APA Boskri, Abdelkarim.,Petrov, Romain G..,El Halkouj, Thami.,Hadjara, Massinissa.,Leftley, James.,...&Carbillet, Marcel.(2021).Potential and sky coverage for off-axis fringe tracking in optical long baseline interferometry.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,506(1),1364-1388.
MLA Boskri, Abdelkarim,et al."Potential and sky coverage for off-axis fringe tracking in optical long baseline interferometry".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 506.1(2021):1364-1388.
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