A dataset provided by the European Space Agency

Proposal ID 1020018
Obs ID 10200180001
Title Helium-rich thermonuclear bursts from the Slow Burster
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:1020018
DOI https://doi.org/10.57780/esa-14xx0mw
Author Galloway
Abstract Thermonuclear bursts in systems accreting pure helium reveal the structure of the neutron star (NS) interiors. In the absence of heating from steady H-burning between bursts, the burst recurrence times and energetics are much more sensitive to the thermal properties and processes in the NS crust and core. Interestingly, burst ignition models predict significantly longer burst recurrence times than observed for such sources. One way to resolve this discrepancy is fractional covering of the accreted fuel on the NS surface, and recent analysis of a large sample of bursts from 4U 172834 appears to lend support to this hypothesis. However, a large variation in the properties of bursts observed at similar accretion rates suggests that other processes, perhaps including steady He-burning or incomplete burning, may also be important.We propose to observe 4U 172834 with INTEGRAL and XMM-Newton simultaneously, in order to measure the burst recurrence time and the persistent X-ray flux (and hence the accretion rate) in the broadest possible band, to distinguish between these possibilities. The precise accretion rate measured over a wide, multi-instrument energy band is crucial, as it will enable detection of additional soft (or hard) spectral components outside the sensitivity band of individual detectors. The results of this study will provide stringent constraints for modeling of burst ignition conditions.
Publications
Temporal Coverage 2013-09-30T18:22:28Z / 2013-10-03T06:30:40Z
Version 1.0
Mission Description The INTEGRAL (International Gamma-Ray Astrophysics Laboratory) mission, launched by the European Space Agency (ESA) on October 17, 2002, was designed to study high-energy phenomena in the universe. INTEGRAL was operating until february 2025 and it was equipped with three high-energy instruments: the Imager on Board the INTEGRAL Satellite (IBIS), the Spectrometer on INTEGRAL (SPI), and the JEM-X (Joint European Monitor for X-rays). Its Optical Monitoring Camera (OMC) provided optical V-band magnitude measurements, complementing the high-energy observations.
Creator Contact https://www.cosmos.esa.int/web/integral/helpdesk
Date Published 2026-03-05T13:05:58Z
Keywords INTEGRAL gamma-ray data, ESA INTEGRAL mission dataset, gamma-ray astronomy observations, high-energy astrophysics data, IBIS imaging data, SPI spectrometer data, JEM-X X-ray monitoring data, OMC optical monitoring data, coded mask telescope observations, gamma-ray spectroscopy dataset, MeV astrophysics data, keV–MeV photon observations, gamma-ray burst observations dataset, black hole gamma-ray data, neutron star high-energy observations, positron annihilation 511 keV line data, Galactic Center gamma-ray emission dataset, supernova nucleosynthesis gamma-ray lines, active galactic nuclei high-energy data, transient astrophysical source monitoring, calibrated photon event lists, gamma-ray light curves, high-energy spectra data, sky maps gamma-ray, time-series astrophysical observations, long-term gamma-ray monitoring dataset
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Galloway, 2026, 'Helium-rich thermonuclear bursts from the Slow Burster', 1.0, European Space Agency, https://doi.org/10.57780/esa-14xx0mw