Pith. Sign in

RECORD

Simultaneous optical and X-ray high speed photometry of Cyg X-2

PaperPDF from arXiv

data files

Paper breakdownThe authors' claims, conditions and measurements, as JSON Signed receiptProof this review has not been altered
X Bluesky LinkedIn Reddit Hacker News
G. Dubus, B. Kern, A. A. Esin, R. E. Rutledge, C. Martin

Astrophysics · Submitted 21 Oct 2003

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

The authors' main claim We do not find significant correlations between the X-ray and optical fluxes on short timescales, hence cannot conclude whether magnetic flares contribute significantly to the optical emission.

how it is stated · asserted 0.97 read the record →

Comment (0) Read on arXiv ↗
Cite ▾
arXiv IDastro-ph/0310615 (version 1)
Pith IDCVYNWC7M, Pith's permanent record of this paper and its review
CitationA. A. Esin, B. Kern, C. Martin, G. Dubus, R. E. Rutledge. "Simultaneous optical and X-ray high speed photometry of Cyg X-2." arXiv:astro-ph/0310615 (2003). https://pith.science/paper/CVYNWC7M
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.

Open the compiled record

Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,003 input tokens.

What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.95 · human participants 0.02 · controlled comparison 0.05 · randomized assignment 0.01 · states quantitative result 0.98 · compares with prior results 0.57 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

The X-ray emission from X-ray binaries may originate in flares occurring when magnetic loops anchored in the disc reconnect. In analogy with our Sun, H alpha emission should arise as the accelerated electrons thermalize in the optically emitting disc, perhaps leading to correlated variability between X-rays, H alpha and the optical continuum. We present simultaneous X-ray and optical high speed photometry of the neutron star low-mass X-ray binary Cyg X-2 to search for such correlations. The highest time resolution achieved is 5 ms in white light and 100 ms with a 3 nm filter centred on H alpha. We find power on timescales > 100s (flickering) in optical with a total r.m.s. of a few %, about an order of magnitude less than that seen in X-rays. We do not find significant correlations between the X-ray and optical fluxes on short timescales, hence cannot conclude whether magnetic flares contribute significantly to the optical emission.

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 X-ray emission from X-ray binaries may originate in flares occurring when magnetic loops anchored in the disc reconnect. background 1.00 0.05 0.02 hedged possibility 1.00
s1 In analogy with our Sun, H alpha emission should arise as the accelerated electrons thermalize in the optically emitting disc, perhaps leading to correlated variability between X-rays, H alpha and the optical continuum. background 0.99 0.06 0.02 hedged possibility 0.89
s2 We present simultaneous X-ray and optical high speed photometry of the neutron star low-mass X-ray binary Cyg X-2 to search for such correlations. contribution 0.98 0.95 0.03 asserted 0.86
s3 The highest time resolution achieved is 5 ms in white light and 100 ms with a 3 nm filter centred on H alpha. method 0.98 0.95 0.02 asserted 1.00
s4 We find power on timescales > 100s (flickering) in optical with a total r.m.s. of a few %, about an order of magnitude less than that seen in X-rays. result 1.00 0.97 0.13 asserted 1.00
s5 We do not find significant correlations between the X-ray and optical fluxes on short timescales, hence cannot conclude whether magnetic flares contribute significantly to the optical emission. result 0.90 0.97 0.88 asserted 0.97

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 X-ray emission from X-ray binaries may originate in flares occurring when magnetic loops anchored in the disc reconnect. In analogy with our Sun, H alpha emission should arise as the accelerated electrons thermalize in the optically emitting disc, perhaps leading to correlated variability between X-rays, H alpha and the optical continuum. We present simultaneous X-ray and optical high speed photometry of the neutron star low-mass X-ray binary Cyg X-2 to search for such correlations. The highest time resolution achieved is 5 ms in white light and 100 ms with a 3 nm filter centred on H alpha. We find power on timescales > 100s (flickering) in optical with a total r.m.s. of a few %, about an order of magnitude less than that seen in X-rays. We do not find significant correlations between the X-ray and optical fluxes on short timescales, hence cannot conclude whether magnetic flares contribute significantly to the optical emission.

Human review

How Pith checks papers → · Full audit of this paper →

Discussion

Know something about this paper? Leave a comment, or highlight any passage above to comment on it.