{"title":"Exploration of Fermi-LAT Data: An Analysis of Pulsar J1930+1852","authors":"A. Cook","doi":"10.26443/msurj.v13i1.25","DOIUrl":null,"url":null,"abstract":"Background: Fermi-LAT’s 9-year data set of astrophysical gamma-rays (recently reprocessed) has revealed many new astrophysical sources. A closer analysis of one of these previously unseen sources, PSR J1930+1852 and associated pulsar wind nebula, G54.0+0.3, could help to confirm the gamma-ray emission mechanism of pulsars.\nMethods: An investigation and analysis of PSR J1930+1852 and PWN G54.0+0.3 using Fermi-LAT data and science tools using maximum likelihood fitting is detailed.Results: A 4.3 σ (p = 0.000017) excess above background was observed at the coordinates of the pulsar/pulsar wind nebula and the sources spectrum appears to be consistent with a single power law.\nLimitations: The sources in the models are modelled as point sources. Further studies may want to consider the possibility of extended sources in the modelled region.\nConclusion: There is evidence for a Fermi-LAT detection of this pulsar wind nebula and the source spectrum appears to be consistent with a standard power law. An upper limit calculation predicts only about 100 events with energy above 1 GeV in the 9-year data set so a pulsation search was not conducted.","PeriodicalId":91927,"journal":{"name":"McGill Science undergraduate research journal : MSURJ","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2018-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"McGill Science undergraduate research journal : MSURJ","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.26443/msurj.v13i1.25","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Background: Fermi-LAT’s 9-year data set of astrophysical gamma-rays (recently reprocessed) has revealed many new astrophysical sources. A closer analysis of one of these previously unseen sources, PSR J1930+1852 and associated pulsar wind nebula, G54.0+0.3, could help to confirm the gamma-ray emission mechanism of pulsars.
Methods: An investigation and analysis of PSR J1930+1852 and PWN G54.0+0.3 using Fermi-LAT data and science tools using maximum likelihood fitting is detailed.Results: A 4.3 σ (p = 0.000017) excess above background was observed at the coordinates of the pulsar/pulsar wind nebula and the sources spectrum appears to be consistent with a single power law.
Limitations: The sources in the models are modelled as point sources. Further studies may want to consider the possibility of extended sources in the modelled region.
Conclusion: There is evidence for a Fermi-LAT detection of this pulsar wind nebula and the source spectrum appears to be consistent with a standard power law. An upper limit calculation predicts only about 100 events with energy above 1 GeV in the 9-year data set so a pulsation search was not conducted.