Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree Algorithm
Gamma rays are the most energetic photons in the electromagnetic spectrum, detected with ground-based and space-based detectors in different energy ranges from sources in our galaxy and beyond. Gamma-ray point sources can be identified by special clustering of these photons. The minimum spanning tre...
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| Format: | Article |
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Damghan university
2023-12-01
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| Series: | Iranian Journal of Astronomy and Astrophysics |
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| Online Access: | https://ijaa.du.ac.ir/article_385_9e13b5118e28445c89addefd40f41ca2.pdf |
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| author | Mehran Soor Fatemeh Akhondi Hadi Hedayati |
| author_facet | Mehran Soor Fatemeh Akhondi Hadi Hedayati |
| author_sort | Mehran Soor |
| collection | DOAJ |
| description | Gamma rays are the most energetic photons in the electromagnetic spectrum, detected with ground-based and space-based detectors in different energy ranges from sources in our galaxy and beyond. Gamma-ray point sources can be identified by special clustering of these photons. The minimum spanning tree (MST) algorithm is a graph-based method in order to find clusters. In this paper, we use the MST algorithm for finding point sources in Fermi gamma-ray space telescope data which is sensitive to photons with energies of 20 MeV up to more than 300 GeV. To this end, we selected eight completely random (10°×10°) fields of Fermi gamma-ray sky and tested the algorithm on the 12-year Fermi-LAT sky (Pass 8) at energy ranges above 3 GeV and above 6 GeV and with different cluster selection criteria. The calculation of Precision and Recall for both fields shows that MST is a useful algorithm in order to identify the point. |
| format | Article |
| id | doaj-art-19d42b6ddc2e4e6d9ee3d5595e7c1e45 |
| institution | Kabale University |
| issn | 2322-4924 2383-403X |
| language | English |
| publishDate | 2023-12-01 |
| publisher | Damghan university |
| record_format | Article |
| series | Iranian Journal of Astronomy and Astrophysics |
| spelling | doaj-art-19d42b6ddc2e4e6d9ee3d5595e7c1e452025-01-12T10:03:51ZengDamghan universityIranian Journal of Astronomy and Astrophysics2322-49242383-403X2023-12-0110432733410.22128/ijaa.2023.736.1170385Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree AlgorithmMehran Soor0Fatemeh Akhondi1Hadi Hedayati2Department of Physics, K.N. Toosi University of Technology, Tehran, IranDepartment of Physics, K.N Toosi University of Technology, 4 P.O. Box 15875-4416, Tehran, IranDepartment of Physics, K.N. Toosi University of Technology, Tehran, IranGamma rays are the most energetic photons in the electromagnetic spectrum, detected with ground-based and space-based detectors in different energy ranges from sources in our galaxy and beyond. Gamma-ray point sources can be identified by special clustering of these photons. The minimum spanning tree (MST) algorithm is a graph-based method in order to find clusters. In this paper, we use the MST algorithm for finding point sources in Fermi gamma-ray space telescope data which is sensitive to photons with energies of 20 MeV up to more than 300 GeV. To this end, we selected eight completely random (10°×10°) fields of Fermi gamma-ray sky and tested the algorithm on the 12-year Fermi-LAT sky (Pass 8) at energy ranges above 3 GeV and above 6 GeV and with different cluster selection criteria. The calculation of Precision and Recall for both fields shows that MST is a useful algorithm in order to identify the point.https://ijaa.du.ac.ir/article_385_9e13b5118e28445c89addefd40f41ca2.pdfastronomy data analysisclusteringgamma-ray sources |
| spellingShingle | Mehran Soor Fatemeh Akhondi Hadi Hedayati Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree Algorithm Iranian Journal of Astronomy and Astrophysics astronomy data analysis clustering gamma-ray sources |
| title | Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree Algorithm |
| title_full | Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree Algorithm |
| title_fullStr | Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree Algorithm |
| title_full_unstemmed | Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree Algorithm |
| title_short | Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree Algorithm |
| title_sort | identification of gamma ray point sources in fermi lat data with minimum spanning tree algorithm |
| topic | astronomy data analysis clustering gamma-ray sources |
| url | https://ijaa.du.ac.ir/article_385_9e13b5118e28445c89addefd40f41ca2.pdf |
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