TY  - JOUR
AU  - Amerio, A.
AU  - Calore, F.
AU  - Serpico, P. D.
AU  - Zaldivar, B.
PY  - 2024
DA  - 2024//
TI  - Deepening gamma-ray point-source catalogues with sub-threshold information
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 055
EP  - 18pp
VL  - 03
IS  - 3
PB  - IOP Publishing Ltd
KW  - gamma ray theory
KW  - Frequentist statistics
AB  - We propose a novel statistical method to extend Fermi-LAT catalogues of highlatitude -y-ray sources below their nominal threshold. To do so, we rely on the determination of the differential source -count distribution of sub -threshold sources which only provides the statistical flux distribution of faint sources. By simulating ensembles of synthetic skies, we assess quantitatively the likelihood for pixels in the sky with relatively low -test statistics to be due to sources, therefore complementing the source -count distribution with spatial information. Besides being useful to orient efforts towards multi -messenger and multi -wavelength identification of new -y-ray sources, we expect the results to be especially advantageous for statistical applications such as cross -correlation analyses.
SN  - 1475-7516
UR  - https://arxiv.org/abs/2306.16483
UR  - https://doi.org/10.1088/1475-7516/2024/03/055
DO  - 10.1088/1475-7516/2024/03/055
LA  - English
N1  - WOS:001194945600003
ID  - Amerio_etal2024
ER  -