Upper limit of peak area

Helene, O.

doi:10.1016/0167-5087(83)90709-3

Cited by 338 publications

(242 citation statements)

References 4 publications

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“…The upper limit is obtained by looking for 2Δln(likelihood)=4 when increasing the flux from the maximum likelihood value if the TS value of the source is larger than 1. Whenever TS < 1, we switched to the Bayesian method proposed by Helene (1983).…”

Section: Spectramentioning

confidence: 99%

Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10 GeV

Ackermann

Ajello

Baldini

et al. 2017

ApJ

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The spatial extension of a γ-ray source is an essential ingredient to determine its spectral properties, as well as its potential multiwavelength counterpart. The capability to spatially resolve γ-ray sources is greatly improved by the newly delivered Fermi-Large Area Telescope (LAT) Pass 8 event-level analysis, which provides a greater acceptance and an improved point-spread function, two crucial factors for the detection of extended sources. Here, we present a complete search for extended sources located within 7°from the Galactic plane, using 6 yr of Fermi-LAT data above 10 GeV. We find 46 extended sources and provide their morphological and spectral characteristics. This constitutes the first catalog of hard Fermi-LAT extended sources, named the Fermi Galactic Extended Source Catalog, which allows a thorough study of the properties of the Galactic plane in the sub-TeV domain.

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Section: Spectramentioning

confidence: 99%

Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10 GeV

Ackermann

Ajello

Baldini

et al. 2017

ApJ

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“…(10) in [28]). Using the effective area and assuming a differential power law photon spectrum, the upper limit to the fluence of a GRB in the VHE range is obtained.…”

Section: Discussionmentioning

confidence: 99%

ARGO-YBJ constraints on very high energy emission from GRBs

Aielli

Bacci

Bartoli

et al. 2009

Astroparticle Physics

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The ARGO-YBJ (Astrophysical Radiation Ground-based Observatory at YangBaJing) experiment is designed for very high energy γ-astronomy and cosmic ray researches. Due to the full coverage of a large area (5600m 2 ) with resistive plate chambers at a very high altitude (4300 m a.s.l.), the ARGO-YBJ detector is used to search for transient phenomena, such as Gamma-ray bursts (GRBs). Because the ARGO-YBJ detector has a large field of view (∼2 sr) and is operated with a high duty cycle (>90%), it is well suited for GRB surveying and can be operated in searches for high energy GRBs following alarms set by satellite-borne observations at lower energies. In this paper, the sensitivity of the ARGO-YBJ detector for GRB detection is estimated. Upper limits to fluence with 99% confidence level for 26 GRBs inside the field of

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“…2. For different number of observed events n and different expected background b, the upper limits derived in [5] are shown in Fig. 4.…”

Section: Epj Web Of Conferencesmentioning

confidence: 99%

“…The general case of a possible expected background b 0 was treated by O. Helene [ 5], and Eq. 14 becomes:…”

Section: Epj Web Of Conferencesmentioning

confidence: 99%

“…[ 5] and the frequentist approach was attempted by G. Zech [8]. In order to determine the probability distribution of the number of events from the sum of two Poissonian processes with s and b expected number of events from signal and background, respectively, one can write the probability distribution for the total observed number of events n as:…”

Section: Steps Towards a Frequentist Approachmentioning

confidence: 99%

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Setting limits and application to Higgs boson search

Lista

2013

EPJ Web of Conferences

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Abstract. This lecture summarizes the basic concept of hypothesis testing, will introduce the concepts of significance and upper limit under the frequentist and Bayesian approaches, and will discuss the benefits and limitations of the most popular approaches. Special attention will be devoted to the so-called modified frequentist approach, which is a popular method in High Energy Physics, and some application to real physics cases will be discussed.

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Upper limit of peak area

Cited by 338 publications

References 4 publications

Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10 GeV

Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10 GeV

ARGO-YBJ constraints on very high energy emission from GRBs

Setting limits and application to Higgs boson search

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