A dataset provided by the European Space Agency

Proposal ID 1020009
Obs ID 10200090001
Title Probing the circumstellar environment during periastron passage in the SFXTs IGR J17354-3255 and IGR J18483-0311
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:1020009
DOI https://doi.org/10.57780/esa-qtxv3pg
Author Drave
Abstract The mass transfer and accretion mechanisms in SFXTs are key questions to be answered in order to place the SFXTs in the wider context of HMXB systems. Current theories centre on mass transfer via isotropic but inhomogeneous (clumpy) winds, but some systems also show evidence of disk-like structures around the supergiant, analogous to those seen in Be/X-ray binaries. We propose a campaign of periastron observations of 2 SFXTs with known ephemerides following on from the accepted AO-9 programme Probing the nature of the circumstellar environment around periastron in SFXTs (P.I. Drave, PropID 0920016). Using both INTEGRAL and XMM-Newton we will measure the instantaneous accretion rate, emission spectrum and time variability generated on and around the neutron star. Now that the orbital parameters of these SFXTs are well-determined, targeted continuous broad-band observations around periastron provide us with the best opportunity to use the (assumed) neutron star as a direct probe of the circumstellar wind environment. To achieve the goals outlined in this proposal we request 467ks of fixed time INTEGRAL observations complemented with 80ks of simultaneous XMM-Newton observations.
Publications
Temporal Coverage 2013-03-29T11:31:08Z / 2013-03-31T07:34:25Z
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 2025-03-25T09:54:37Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Drave, 2025, 'Probing the circumstellar environment during periastron passage in the SFXTs IGR J17354-3255 and IGR J18483-0311', 1.0, European Space Agency, https://doi.org/10.57780/esa-qtxv3pg