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The WC6 Wolf-Rayet star MLA 1159 in M31 and its ionization nebula BA 1-642

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J. Greiner (Astrophys. Inst. Potsdam, Germany), G.H. Tovmassian (UNAM Ensenada, Mexico), S. Komossa (MPE Garching, M. Rosado, A. Arrieta (both UNAM Ensenada

Astrophysics · Submitted 3 May 1999

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

The authors' main claim Though both objects have been known for many years, our observations (1) confirm the Wolf-Rayet nature of MLA 1159, (2) allow one to determine the nebula as an ionization nebula, and (3) demonstrate the association of MLA 1159 with the nebula.

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arXiv IDastro-ph/9905011 (version 1)
CitationA. Arrieta (both UNAM Ensenada, Germany), G.H. Tovmassian (UNAM Ensenada, J. Greiner (Astrophys. Inst. Potsdam, Mexico), M. Rosado, S. Komossa (MPE Garching. "The WC6 Wolf-Rayet star MLA 1159 in M31 and its ionization nebula BA 1-642." arXiv:astro-ph/9905011 (1999). https://pith.science/paper/astro-ph/9905011
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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-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,184 input tokens, $0.0001 reported.

What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.35 · human participants 0.01 · controlled comparison 0.02 · randomized assignment 0.01 · states quantitative result 0.07 · compares with prior results 0.37 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

We report on optical imaging and spectroscopic observations of the Wolf-Rayet candidate star MLA 1159 and the surrounding ionization nebula BA 1-642 in the Andromeda Galaxy. Though both objects have been known for many years, our observations (1) confirm the Wolf-Rayet nature of MLA 1159, (2) allow one to determine the nebula as an ionization nebula, and (3) demonstrate the association of MLA 1159 with the nebula. The supersoft X-ray source RX J0045.5+4206 whose error box encompasses the full nebula, seems to be a chance superposition and not related to MLA 1159 and/or BA 1-642.

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 report on optical imaging and spectroscopic observations of the Wolf-Rayet candidate star MLA 1159 and the surrounding ionization nebula BA 1-642 in the Andromeda Galaxy. contribution 0.99 0.94 0.06 asserted 0.94
s1 Though both objects have been known for many years, our observations (1) confirm the Wolf-Rayet nature of MLA 1159, (2) allow one to determine the nebula as an ionization nebula, and (3) demonstrate the association of MLA 1159 with the nebula. result 0.94 0.95 0.85 asserted 1.00
s2 The supersoft X-ray source RX J0045.5+4206 whose error box encompasses the full nebula, seems to be a chance superposition and not related to MLA 1159 and/or BA 1-642. result 0.66 0.59 0.07 hedged possibility 0.66

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

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  • full text
  • figures and tables
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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 report on optical imaging and spectroscopic observations of the Wolf-Rayet candidate star MLA 1159 and the surrounding ionization nebula BA 1-642 in the Andromeda Galaxy. Though both objects have been known for many years, our observations (1) confirm the Wolf-Rayet nature of MLA 1159, (2) allow one to determine the nebula as an ionization nebula, and (3) demonstrate the association of MLA 1159 with the nebula. The supersoft X-ray source RX J0045.5+4206 whose error box encompasses the full nebula, seems to be a chance superposition and not related to MLA 1159 and/or BA 1-642.

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