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VLBA imaging of a periodic 12.2 GHz methanol maser flare in G9.62+0.20E

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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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S. Goedhart, V. Minier, M. J. Gaylard, D. J. van der Walt

Astrophysics · Submitted 2 Dec 2004

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

The authors' main claim This rules out any mechanism which disturbs the masing region itself, implying that the flares are caused by a change in either the seed or pump photon levels.

how it is stated · asserted 0.99 read the record →

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arXiv IDastro-ph/0412056 (version 1)
Pith IDDXTDW6RR, Pith's permanent record of this paper and its review
CitationD. J. van der Walt, M. J. Gaylard, S. Goedhart, V. Minier. "VLBA imaging of a periodic 12.2 GHz methanol maser flare in G9.62+0.20E." arXiv:astro-ph/0412056 (2004). https://pith.science/paper/DXTDW6RR
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, 6,179 input tokens.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.26 · human participants 0.01 · controlled comparison 0.05 · randomized assignment 0.01 · states quantitative result 0.98 · compares with prior results 0.15 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

The class II methanol maser source G9.62+0.20E undergoes periodic flares at both 6.7 and 12.2 GHz. The flare starting in 2001 October was observed at seven epochs over three months using the VLBA at 12.2 GHz. High angular resolution images (beam size $\sim$ 1.7 x 0.6 mas) were obtained, enabling us to observe changes in 16 individual maser components. It was found that while existing maser spots increased in flux density, no new spots developed and no changes in morphology were observed. This rules out any mechanism which disturbs the masing region itself, implying that the flares are caused by a change in either the seed or pump photon levels. A time delay of 1--2 weeks was observed between groups of maser features. These delays can be explained by light travel time between maser groups. The regularity of the flares can possibly be explained by a binary system.

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 class II methanol maser source G9.62+0.20E undergoes periodic flares at both 6.7 and 12.2 GHz. background 0.95 0.39 0.06 asserted 1.00
s1 The flare starting in 2001 October was observed at seven epochs over three months using the VLBA at 12.2 GHz. method 0.94 0.93 0.02 asserted 1.00
s2 High angular resolution images (beam size $\sim$ 1.7 x 0.6 mas) were obtained, enabling us to observe changes in 16 individual maser components. method 0.96 0.95 0.03 asserted 1.00
s3 It was found that while existing maser spots increased in flux density, no new spots developed and no changes in morphology were observed. result 1.00 0.95 0.16 asserted 1.00
s4 This rules out any mechanism which disturbs the masing region itself, implying that the flares are caused by a change in either the seed or pump photon levels. interpretation 1.00 0.86 0.74 asserted 0.99
s5 A time delay of 1--2 weeks was observed between groups of maser features. result 1.00 0.94 0.05 asserted 1.00
s6 These delays can be explained by light travel time between maser groups. interpretation 1.00 0.69 0.08 hedged possibility 0.66
s7 The regularity of the flares can possibly be explained by a binary system. interpretation 1.00 0.46 0.12 hedged possibility 1.00

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

The class II methanol maser source G9.62+0.20E undergoes periodic flares at both 6.7 and 12.2 GHz. The flare starting in 2001 October was observed at seven epochs over three months using the VLBA at 12.2 GHz. High angular resolution images (beam size $\sim$ 1.7 x 0.6 mas) were obtained, enabling us to observe changes in 16 individual maser components. It was found that while existing maser spots increased in flux density, no new spots developed and no changes in morphology were observed. This rules out any mechanism which disturbs the masing region itself, implying that the flares are caused by a change in either the seed or pump photon levels. A time delay of 1--2 weeks was observed between groups of maser features. These delays can be explained by light travel time between maser groups. The regularity of the flares can possibly be explained by a binary system.

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