INTEGRAL monitoring of unusually long X-ray bursts

Jérôme Chenevez (Invited author), M. Falanga (Invited author), E. Kuulkers (Invited author), Søren Brandt (Invited author), Niels Lund (Invited author), A. Cumming (Invited author)

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch


    X-ray bursts are thermonuclear explosions on the surface of accreting neutron stars in X-ray binaries. As most of the known X-ray bursters are frequently observed by INTEGRAL, an international collaboration have been taking advantage of its instrumentation to specifically monitor the occurrence of exceptional burst events lasting more than ~10 minutes. Half of the dozen so-called intermediate long bursts registered so far have been observed by INTEGRAL. The goal is to derive a comprehensive picture of the relationship between the nuclear ignition processes and the accretion states of the system leading up to such long bursts. Depending on the composition of the accreted material, these bursts may be explained by either the unstable burning of a large pile of mixed hydrogen and helium, or the ignition of a thick pure helium layer. Intermediate long bursts are particularly expected to occur at very low accretion rates and make possible to study the transition from a hydrogen-rich bursting regime to a pure helium regime.
    Original languageEnglish
    Title of host publicationProceedings of the 7th INTEGRAL workshop
    PublisherProceedings of Science
    Publication date2008
    Publication statusPublished - 2008
    EventThe 7th INTEGRAL Workshop: An INTEGRAL view of compact objects - Copenhagen, Denmark
    Duration: 8 Sept 200811 Sept 2008
    Conference number: 7


    ConferenceThe 7th INTEGRAL Workshop


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