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VLBI imaging of the gravitational lens MGJ0414+0534

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Paper breakdownThe authors' claims, conditions and measurements, as JSON Signed receiptProof this review has not been altered
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E. Ros (1), J.C. Guirado (2, 3), J.M. Marcaide (2), M.A. Perez-Torres (2), E.E. Falco (4), J.A. Munoz(4, 5)
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A. Alberdi (6), L. Lara (6) ((1) MPIfR, Germany; (2) U. Valencia, Spain; (3) CAB/INTA, Spain; (4) CfA, US; (5) IAC, Spain, (6) IAA/CSIC, Spain)

Astrophysics · Submitted 29 Sep 2000

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim A simple model combining a singular isothermal ellipsoid to represent the main lens galaxy, external shear, and a singular isothermal sphere to represent an additional, nearby object accounts well for the core positions and flux densities of the VLBI images.

how it is stated · asserted 0.98 read the record →

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arXiv IDastro-ph/0009493 (version 1)
Pith IDJKFQHRDN, Pith's permanent record of this paper and its review
Citation3), 5), (6) IAA/CSIC, A. Alberdi (6), E.E. Falco (4), E. Ros (1), Germany; (2) U. Valencia, J.A. Munoz(4, J.C. Guirado (2, J.M. Marcaide (2), L. Lara (6) ((1) MPIfR, M.A. Perez-Torres (2), Spain, Spain), Spain; (3) CAB/INTA, Spain; (4) CfA, US; (5) IAC. "VLBI imaging of the gravitational lens MGJ0414+0534." arXiv:astro-ph/0009493 (2000). https://pith.science/paper/JKFQHRDN
Claim paper

The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,660 input tokens.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.11 · human participants 0.02 · controlled comparison 0.02 · randomized assignment 0.01 · states quantitative result 0.57 · compares with prior results 0.08 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; .

We observed the quadruple gravitationally lensed image of MGJ0414+0534 on 23 November 1997 with a global VLBI array at 8.4 GHz. We report wide-field imaging results of its four components at submilliarcsecond resolution, displaying complex core-like and jet-like extended structures. A simple model combining a singular isothermal ellipsoid to represent the main lens galaxy, external shear, and a singular isothermal sphere to represent an additional, nearby object accounts well for the core positions and flux densities of the VLBI images. This model predicts delays between the different lensed images of several weeks.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 We observed the quadruple gravitationally lensed image of MGJ0414+0534 on 23 November 1997 with a global VLBI array at 8.4 GHz. method 0.90 0.97 0.03 asserted 1.00
s1 We report wide-field imaging results of its four components at submilliarcsecond resolution, displaying complex core-like and jet-like extended structures. result 0.94 0.95 0.19 asserted 1.00
s2 A simple model combining a singular isothermal ellipsoid to represent the main lens galaxy, external shear, and a singular isothermal sphere to represent an additional, nearby object accounts well for the core positions and flux densities of the VLBI images. method 0.55 0.81 0.46 asserted 0.98
s3 This model predicts delays between the different lensed images of several weeks. result 0.73 0.77 0.22 asserted 0.99

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 1.00.

What was examined, and what was not

sources read
  • arXiv listing abstract v1
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
levels run
  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

We observed the quadruple gravitationally lensed image of MGJ0414+0534 on 23 November 1997 with a global VLBI array at 8.4 GHz. We report wide-field imaging results of its four components at submilliarcsecond resolution, displaying complex core-like and jet-like extended structures. A simple model combining a singular isothermal ellipsoid to represent the main lens galaxy, external shear, and a singular isothermal sphere to represent an additional, nearby object accounts well for the core positions and flux densities of the VLBI images. This model predicts delays between the different lensed images of several weeks.

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How each label was checked · JSON

Found among the papers closest to this one by title and main claim. Pith's classifier compared each pair's main results and a second model family confirmed the relation; checked against two further families, shown conflicts agreed 118 times in 120 and shown same results 218 times in 239. The quoted sentence is the other paper's main claim.

States the same result 1 paper
  • We present also a lens model for MGJ0414+0534, which reproduces the core positions and flux densities of the VLBI images, combining a singular isothermal ellipsoid with external shear, and a singular isothermal sphere to represent, respectively, the main lens galaxy and its neighbor, a faint galaxy near one of the images.

    VLBI imaging of the gravitational lenses B1422+231 and MGJ0414+0534 · 0.98

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