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Flux Measurement at 110 GeV of the Blazar Mrk 501 with CELESTE

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E. Brion (1), the CELESTE collaboration ((1) CENBG Bordeaux)

Astrophysics · Submitted 25 Oct 2005

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

The authors' main claim We obtain an excess of 2.9 sigma during this time and of 4.9 sigma during May and June 2000 that we interpret as a gamma-ray signal from Mrk 501, for which we calculate a flux of (6.9 +/- 2.2) * 10^{-7} photons m^{-2} s^{-1}.

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arXiv IDastro-ph/0510715 (version 1)
Pith ID57YV2D77, Pith's permanent record of this paper and its review
CitationE. Brion (1), the CELESTE collaboration ((1) CENBG Bordeaux). "Flux Measurement at 110 GeV of the Blazar Mrk 501 with CELESTE." arXiv:astro-ph/0510715 (2005). https://pith.science/paper/57YV2D77
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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-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,995 input tokens.

What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.38 · human participants 0.01 · controlled comparison 0.34 · randomized assignment 0.01 · states quantitative result 0.99 · compares with prior results 0.94 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

The new analysis variable xi, shown to be powerful on the data taken with the final configuration of CELESTE, has been applied to data taken with previous detector configurations. First, the analysis is validated on Crab observations, and then the cuts for the blazar Mrk 501 are optimized using Mrk 421 data since the sources have similar declinations. Data from Mrk 501 was recorded in 2000 and 2001. The old analysis gave a 2.5 sigma excess. We obtain an excess of 2.9 sigma during this time and of 4.9 sigma during May and June 2000 that we interpret as a gamma-ray signal from Mrk 501, for which we calculate a flux of (6.9 +/- 2.2) * 10^{-7} photons m^{-2} s^{-1}. An upper limit from the other data with no signal is determined.

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 new analysis variable xi, shown to be powerful on the data taken with the final configuration of CELESTE, has been applied to data taken with previous detector configurations. method 0.73 0.79 0.03 asserted 1.00
s1 First, the analysis is validated on Crab observations, and then the cuts for the blazar Mrk 501 are optimized using Mrk 421 data since the sources have similar declinations. method 1.00 0.85 0.03 asserted 0.99
s2 Data from Mrk 501 was recorded in 2000 and 2001. method 0.89 0.73 0.02 asserted 1.00
s3 The old analysis gave a 2.5 sigma excess. background 0.84 0.36 0.03 asserted 1.00
s4 We obtain an excess of 2.9 sigma during this time and of 4.9 sigma during May and June 2000 that we interpret as a gamma-ray signal from Mrk 501, for which we calculate a flux of (6.9 +/- 2.2) * 10^{-7} photons m^{-2} s^{-1}. result 1.00 0.96 0.88 asserted 0.90
s5 An upper limit from the other data with no signal is determined. result 1.00 0.90 0.04 asserted 0.98

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from analysis of existing data 0.69.

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 new analysis variable xi, shown to be powerful on the data taken with the final configuration of CELESTE, has been applied to data taken with previous detector configurations. First, the analysis is validated on Crab observations, and then the cuts for the blazar Mrk 501 are optimized using Mrk 421 data since the sources have similar declinations. Data from Mrk 501 was recorded in 2000 and 2001. The old analysis gave a 2.5 sigma excess. We obtain an excess of 2.9 sigma during this time and of 4.9 sigma during May and June 2000 that we interpret as a gamma-ray signal from Mrk 501, for which we calculate a flux of (6.9 +/- 2.2) * 10^{-7} photons m^{-2} s^{-1}. An upper limit from the other data with no signal is determined.

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