Gamma-Ray Dark Matter Searches in Milky Way Satellites—A Comparative Review of Data Analysis Methods and Current Results

Rico, J.

doi:10.3390/galaxies8010025

Cited by 25 publications

(22 citation statements)

References 65 publications

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“…57 with integration limits on x defined by the bin under consideration. The forward-folding procedure applied in IACTs can be found for instance in fundamental physics studies, like the search for dark matter [74] or tests of the equivalence principle from the time of flight of cosmic gamma-rays [75].…”

Section: Forward Foldingmentioning

confidence: 99%

Statistical Tools for Imaging Atmospheric Cherenkov Telescopes

D’Amico¹

2022

Preprint

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The development of Imaging Atmospheric Cherenkov Telescopes (IACTs) unveiled the sky in the teraelectronvolt regime, initiating the so-called “TeV revolution” at the beginning of the new millennium. This revolution was also facilitated by the implementation and adaptation of statistical tools for analyzing the shower images collected by these telescopes and inferring the properties of the astrophysical sources that produce such events. The image reconstruction techniques, the background discrimination and the signal-detection analyses are just a few of the pioneering studies applied in the last decades in the analysis of IACTs data. This (succinct) review has the intent of summarizing the most common statistical tools that are used for analyzing data collected with IACTs, focusing on their application in the full analysis chain, giving references to the past literature for a deepened examination.

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Section: Forward Foldingmentioning

confidence: 99%

Statistical Tools for Imaging Atmospheric Cherenkov Telescopes

D’Amico¹

2022

Preprint

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“…The forward folding procedure applied in IACTs can be found for instance in fundamental physics studies, such as the search for dark matter [74] or tests of the equivalence principle from the time of flight of cosmic gamma rays [75].…”

Section: Forward Foldingmentioning

confidence: 99%

Statistical Tools for Imaging Atmospheric Cherenkov Telescopes

D’Amico

2022

Universe

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The development of Imaging Atmospheric Cherenkov Telescopes (IACTs) unveiled the sky in the teraelectronvolt regime, initiating the so-called “TeV revolution”, at the beginning of the new millennium. This revolution was also facilitated by the implementation and adaptation of statistical tools for analyzing the shower images collected by these telescopes and inferring the properties of the astrophysical sources that produce such events. Image reconstruction techniques, background discrimination, and signal-detection analyses are just a few of the pioneering studies applied in recent decades in the analysis of IACTs data. This (succinct) review has the intent of summarizing the most common statistical tools that are used for analyzing data collected with IACTs, focusing on their application in the full analysis chain, including references to existing literature for a deeper examination.

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“…Indeed, the spectrum normalization is completely degenerated between these two quantities, and therefore we will discuss the results based on this overall normalization from now on. To compute the detection or extension significance of the source, we adopt the Test Statistic [9],…”

Section: Pos(icrc2021)508mentioning

confidence: 99%

Spatial extension as a “smoking gun” for dark subhalo detection with Fermi-LAT and implications for WIMP constraints

Coronado-Blázquez¹,

Pérez-Romero²,

Aguirre-Santaella³

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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Spatial extension has been hailed as a "smoking gun" in the gamma-ray search of dark galactic subhalos, which would appear as unidentified sources for gamma-ray telescopes. In this work, we study the actual sensitivity of the Fermi-LAT to extended subhalos using simulated data based on a realistic sky model for the first time. We generate spatial templates for a set of representative subhalos, whose parameters were derived from our previous work with N-body cosmological simulation data. We find that detecting an extended subhalo and finding an unequivocal signal of angular extension requires, respectively, a flux 2 to 10 times larger than in the case of a pointlike source. By studying a large grid of models, where parameters such as the WIMP mass, annihilation channel or subhalo model are varied significantly, we obtain the response of the LAT as a function of the product of annihilation cross section times the J-factor. Indeed, we show that spatial extension can be used as an additional "filter" to reject subhalos candidates among the pool of unidentified LAT sources, as well as a "smoking gun" for positive identification. We conclude that typical angular extensions of about 0.3 • are expected for the considered scenarios. Finally, we also study the impact of the obtained LAT sensitivity to such extended subhalos on the achievable dark matter constraints, that now worsen by a factor of a few with respect to the point-source limits.

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Gamma-Ray Dark Matter Searches in Milky Way Satellites—A Comparative Review of Data Analysis Methods and Current Results

Cited by 25 publications

References 65 publications

Statistical Tools for Imaging Atmospheric Cherenkov Telescopes

Statistical Tools for Imaging Atmospheric Cherenkov Telescopes

Statistical Tools for Imaging Atmospheric Cherenkov Telescopes

Spatial extension as a “smoking gun” for dark subhalo detection with Fermi-LAT and implications for WIMP constraints

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