No Evidence for Galactic Latitude Dependence of the Fast Radio Burst Sky Distribution
<jats:title>Abstract</jats:title> <jats:p>We investigate whether the sky rate of fast radio bursts (FRBs) depends on Galactic latitude using the first catalog of FRBs detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Astronomical Society
2022
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| Online Access: | https://hdl.handle.net/1721.1/142144 |
| _version_ | 1811075879592263680 |
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| author | Josephy, A Chawla, P Curtin, AP Kaspi, VM Bhardwaj, M Boyle, PJ Brar, C Cassanelli, T Fonseca, E Gaensler, BM Leung, C Lin, H-H Masui, KW Mckinven, R Mena-Parra, J Michilli, D Ng, C Pleunis, Z Rafiei-Ravandi, M Rahman, M Sanghavi, P Scholz, P Shin, K Smith, KM Stairs, IH Tendulkar, SP Zwaniga, AV |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Josephy, A Chawla, P Curtin, AP Kaspi, VM Bhardwaj, M Boyle, PJ Brar, C Cassanelli, T Fonseca, E Gaensler, BM Leung, C Lin, H-H Masui, KW Mckinven, R Mena-Parra, J Michilli, D Ng, C Pleunis, Z Rafiei-Ravandi, M Rahman, M Sanghavi, P Scholz, P Shin, K Smith, KM Stairs, IH Tendulkar, SP Zwaniga, AV |
| author_sort | Josephy, A |
| collection | MIT |
| description | <jats:title>Abstract</jats:title>
<jats:p>We investigate whether the sky rate of fast radio bursts (FRBs) depends on Galactic latitude using the first catalog of FRBs detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project. We first select CHIME/FRB events above a specified sensitivity threshold in consideration of the radiometer equation, and then we compare these detections with the expected cumulative time-weighted exposure using Anderson–Darling and Kolmogorov–Smirnov tests. These tests are consistent with the null hypothesis that FRBs are distributed without Galactic latitude dependence (<jats:italic>p</jats:italic>-values distributed from 0.05 to 0.99, depending on completeness threshold). Additionally, we compare rates in intermediate latitudes (∣<jats:italic>b</jats:italic>∣ < 15°) with high latitudes using a Bayesian framework, treating the question as a biased coin-flipping experiment–again for a range of completeness thresholds. In these tests the isotropic model is significantly favored (Bayes factors ranging from 3.3 to 14.2). Our results are consistent with FRBs originating from an isotropic population of extragalactic sources.</jats:p> |
| first_indexed | 2024-09-23T10:13:14Z |
| format | Article |
| id | mit-1721.1/142144 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:13:14Z |
| publishDate | 2022 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1421442023-04-07T19:40:44Z No Evidence for Galactic Latitude Dependence of the Fast Radio Burst Sky Distribution Josephy, A Chawla, P Curtin, AP Kaspi, VM Bhardwaj, M Boyle, PJ Brar, C Cassanelli, T Fonseca, E Gaensler, BM Leung, C Lin, H-H Masui, KW Mckinven, R Mena-Parra, J Michilli, D Ng, C Pleunis, Z Rafiei-Ravandi, M Rahman, M Sanghavi, P Scholz, P Shin, K Smith, KM Stairs, IH Tendulkar, SP Zwaniga, AV MIT Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology. Department of Physics <jats:title>Abstract</jats:title> <jats:p>We investigate whether the sky rate of fast radio bursts (FRBs) depends on Galactic latitude using the first catalog of FRBs detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project. We first select CHIME/FRB events above a specified sensitivity threshold in consideration of the radiometer equation, and then we compare these detections with the expected cumulative time-weighted exposure using Anderson–Darling and Kolmogorov–Smirnov tests. These tests are consistent with the null hypothesis that FRBs are distributed without Galactic latitude dependence (<jats:italic>p</jats:italic>-values distributed from 0.05 to 0.99, depending on completeness threshold). Additionally, we compare rates in intermediate latitudes (∣<jats:italic>b</jats:italic>∣ < 15°) with high latitudes using a Bayesian framework, treating the question as a biased coin-flipping experiment–again for a range of completeness thresholds. In these tests the isotropic model is significantly favored (Bayes factors ranging from 3.3 to 14.2). Our results are consistent with FRBs originating from an isotropic population of extragalactic sources.</jats:p> 2022-04-27T17:15:51Z 2022-04-27T17:15:51Z 2021 2022-04-27T17:12:51Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142144 Josephy, A, Chawla, P, Curtin, AP, Kaspi, VM, Bhardwaj, M et al. 2021. "No Evidence for Galactic Latitude Dependence of the Fast Radio Burst Sky Distribution." Astrophysical Journal, 923 (1). en 10.3847/1538-4357/AC33AD Astrophysical Journal Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf American Astronomical Society The American Astronomical Society |
| spellingShingle | Josephy, A Chawla, P Curtin, AP Kaspi, VM Bhardwaj, M Boyle, PJ Brar, C Cassanelli, T Fonseca, E Gaensler, BM Leung, C Lin, H-H Masui, KW Mckinven, R Mena-Parra, J Michilli, D Ng, C Pleunis, Z Rafiei-Ravandi, M Rahman, M Sanghavi, P Scholz, P Shin, K Smith, KM Stairs, IH Tendulkar, SP Zwaniga, AV No Evidence for Galactic Latitude Dependence of the Fast Radio Burst Sky Distribution |
| title | No Evidence for Galactic Latitude Dependence of the Fast Radio Burst Sky Distribution |
| title_full | No Evidence for Galactic Latitude Dependence of the Fast Radio Burst Sky Distribution |
| title_fullStr | No Evidence for Galactic Latitude Dependence of the Fast Radio Burst Sky Distribution |
| title_full_unstemmed | No Evidence for Galactic Latitude Dependence of the Fast Radio Burst Sky Distribution |
| title_short | No Evidence for Galactic Latitude Dependence of the Fast Radio Burst Sky Distribution |
| title_sort | no evidence for galactic latitude dependence of the fast radio burst sky distribution |
| url | https://hdl.handle.net/1721.1/142144 |
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