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Opacity in the jet of 3C309.1

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E. Ros, A.P. Lobanov (MPIfR, Bonn, Germany)

Astrophysics · Submitted 25 Oct 2001

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

The authors' main claim Finally, we discuss briefly the observed shift of the core position.

how it is stated · unclear 0.78 read the record →

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arXiv IDastro-ph/0110542 (version 1)
Pith IDDZQYPK56, Pith's permanent record of this paper and its review
CitationA.P. Lobanov (MPIfR, Bonn, E. Ros, Germany). "Opacity in the jet of 3C309.1." arXiv:astro-ph/0110542 (2001). https://pith.science/paper/DZQYPK56
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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, 4,486 input tokens.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.56 · human participants 0.02 · controlled comparison 0.06 · randomized assignment 0.01 · states quantitative result 0.20 · compares with prior results 0.12 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

The "core" of a radio source is believed to mark the frequency-dependent location where the optical depth to synchrotron self--absorption tau_s~1. The frequency dependence can be used for derive physical conditions of the radio emitting region and the ambient environment near the central engine of the radio source. In order to test and improve the models to derive this information, we made multi-frequency dual-polarization observations of 3C309.1 in 1998.6, phase-referenced to the QSOs S5 1448+76 and 4C72.20 (S5 1520+72) (4d26' and 1d49' away, respectively). We present here preliminary results from these observations: total and polarized intensity maps, spectral information deduced from these images, and the relative position of 3C309.1 with respect to S5 1448+76 at different frequencies. Finally, we discuss briefly the observed shift of the core position.

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 The "core" of a radio source is believed to mark the frequency-dependent location where the optical depth to synchrotron self--absorption tau_s~1. background 1.00 0.04 0.05 hedged possibility 0.65
s1 The frequency dependence can be used for derive physical conditions of the radio emitting region and the ambient environment near the central engine of the radio source. background 1.00 0.04 0.04 asserted 0.86
s2 In order to test and improve the models to derive this information, we made multi-frequency dual-polarization observations of 3C309.1 in 1998.6, phase-referenced to the QSOs S5 1448+76 and 4C72.20 (S5 1520+72) (4d26' and 1d49' away, respectively). method 0.94 0.97 0.03 asserted 0.95
s3 We present here preliminary results from these observations: total and polarized intensity maps, spectral information deduced from these images, and the relative position of 3C309.1 with respect to S5 1448+76 at different frequencies. contribution 0.53 0.96 0.08 asserted 0.96
s4 Finally, we discuss briefly the observed shift of the core position. interpretation 0.65 0.59 0.13 unclear 0.78

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

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sources read
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not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
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  • 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

The "core" of a radio source is believed to mark the frequency-dependent location where the optical depth to synchrotron self--absorption tau_s~1. The frequency dependence can be used for derive physical conditions of the radio emitting region and the ambient environment near the central engine of the radio source. In order to test and improve the models to derive this information, we made multi-frequency dual-polarization observations of 3C309.1 in 1998.6, phase-referenced to the QSOs S5 1448+76 and 4C72.20 (S5 1520+72) (4d26' and 1d49' away, respectively). We present here preliminary results from these observations: total and polarized intensity maps, spectral information deduced from these images, and the relative position of 3C309.1 with respect to S5 1448+76 at different frequencies. Finally, we discuss briefly the observed shift of the core position.

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