A dataset provided by the European Space Agency

Name: Catch Scorpius X-1 by the tail: high quality hard X-ray tail from monitoring observations of the brightest neutron star.
Published: 2025-03-25T09:54:38Z

Proposal ID	1220027
Obs ID	12200270001, 12200270002, 12200270004, 12200270005, 12200270006, 12200270007
Title	Catch Scorpius X-1 by the tail: high quality hard X-ray tail from monitoring observations of the brightest neutron star.
Download Data Associated to the proposal	https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:1220027
DOI	https://doi.org/10.57780/esa-8kx6qgx
Author	Revnivtsev
Abstract	Luminous accretion powered neutron stars generate majority of their X-ray emission in optically thick accretion disks and boundary/spreading layers. Numerous experiments in hard X-ray energy range show that nevertheless part of the energy release sometimes occurs in optically thin regime. This leads to generation of hard X-ray tail in spectra of luminous neutron stars. Among different physical mechanisms under discussion are Comptonization on thermal and non thermal population of electrons, on bulk motion of matter in the accretion flow, synchrotron emission of relativistic electrons. Scorpius X-1 is the brightest accretion powered neutron star on the sky, therefore it is reasonable to validate all proposed theoretical models on data, collected from this source. INTEGRAL data collected so far allowed us to obtain its spectrum at energies 20-300 keV and exclude some of the proposed models. INTEGRAL data have demonstrated that hard X-ray tail of Sco X-1 is highly variable with factor of more than 50. This means that highest statistical quality spectrum of Sco X-1 can be obtained not by averaging all of the available dataset, but by collection of data during carefully selected periods of its enhanced activity. Thus, the goal of our proposal is to monitor the behavior of hard X-ray emission of Sco X-1 with the aim to obtain the best statistical quality of hard X-ray part of its spectrum. Such increase of statistical quality will allow to further constrain physical models of generation of non thermal population of particles in the accretion flows.
Publications	Background modelling for I3-ray spectroscopy with INTEGRAL/SPI - Siegert, Thomas, Diehl, Roland,Weinberger, Christoph,Pleintinger, Moritz M. M.,Greiner, Jochen,Zhang, Xiaoling (2019-06-01) http://ui.adsabs.harvard.edu/#abs/2019A&A...626A..73S Comparing simulated ²⁶Al maps to gamma-ray measurements - Pleintinger, Moritz M. M., Siegert, Thomas,Diehl, Roland,Fujimoto, Yusuke,Greiner, Jochen,Krause, Martin G. H.,Krumholz, Mark R. (2019-12-01) http://ui.adsabs.harvard.edu/#abs/2019A&A...632A..73P Diffuse Galactic emission spectrum between 0.5 and 8.0 MeV - Siegert, Thomas, Berteaud, Joanna,Calore, Francesca,Serpico, Pasquale D.,Weinberger, Christoph (2022-04-01) http://ui.adsabs.harvard.edu/#abs/2022A&A...660A.130S Extreme relativistic electron fluxes in the Earths outer radiation belt: Analysis of INTEGRAL IREM data - Meredith, Nigel P., Horne, Richard B.,Sandberg, Ingmar,Papadimitriou, Constantinos,Evans, Hugh D. R. (2017-07-01) http://ui.adsabs.harvard.edu/#abs/2017SpWea..15..917M Fermi Transient J1544{dash}0649: A Flaring Radio-weak BL Lac - Bruni, Gabriele, Panessa, Francesca,Ghisellini, Gabriele,Chavushyan, Vahram,Pena-Herazo, Harold A.,Hernandez-Garcia, Lorena,Bazzano, Angela,Ubertini, Pietro,Kraus, Alex (2018-02-01) http://ui.adsabs.harvard.edu/#abs/2018ApJ...854L..23B Gamma-Ray Emission of ⁶⁰Fe and ²⁶Al Radioactivity in Our Galaxy - Wang, W., Siegert, T.,Dai, Z. G.,Diehl, R.,Greiner, J.,Heger, A.,Krause, M.,Lang, M.,Pleintinger, M. M. M.,Zhang, X. L. (2020-02-01) http://ui.adsabs.harvard.edu/#abs/2020ApJ...889..169W INTEGRAL/SPI {$gamma$}-ray line spectroscopy. Response and background characteristics - Diehl, Roland, Siegert, Thomas,Greiner, Jochen,Krause, Martin,Kretschmer, Karsten,Lang, Michael,Pleintinger, Moritz,Strong, Andrew W.,Weinberger, Christoph,Zhang, Xiaoling (2018-03-01) http://ui.adsabs.harvard.edu/#abs/2018A&A...611A..12D New hard X-ray sources discovered in the ongoing INTEGRAL Galactic plane survey after 14 yr of observations - Krivonos, Roman A., Tsygankov, Sergey S.,Mereminskiy, Ilya A.,Lutovinov, Alexander A.,Sazonov, Sergey Yu.,Sunyaev, Rashid A. (2017-09-01) http://ui.adsabs.harvard.edu/#abs/2017MNRAS.470..512K Primordial black hole dark matter in the context of extra dimensions - Friedlander, Avi, Mack, Katherine J.,Schon, Sarah,Song, Ningqiang,Vincent, Aaron C. (2022-05-01) http://ui.adsabs.harvard.edu/#abs/2022PhRvD.105j3508F Searching for redshifted 2.2 MeV neutron-capture lines from accreting neutron stars: Theoretical X-ray luminosity requirements and INTEGRAL/SPI observations - Ducci, L., Santangelo, A.,Tsygankov, S.,Mushtukov, A.,Ferrigno, C. (2024-10-01) http://ui.adsabs.harvard.edu/#abs/2024A&A...690A.309D ²⁶Al gamma rays from the Galaxy with INTEGRAL/SPI - Pleintinger, Moritz M. M., Diehl, Roland,Siegert, Thomas,Greiner, Jochen,Krause, Martin G. H. (2023-04-01) http://ui.adsabs.harvard.edu/#abs/2023A&A...672A..53P Surround and Squash: the impact of superbubbles on the interstellar medium in Scorpius-Centaurus OB2 - Krause, Martin G. H., Burkert, Andreas,Diehl, Roland,Fierlinger, Katharina,Gaczkowski, Benjamin,Kroell, Daniel,Ngoumou, Judith,Roccatagliata, Veronica,Siegert, Thomas,Preibisch, Thomas (2018-11-01) http://ui.adsabs.harvard.edu/#abs/2018A&A...619A.120K Swift, NuSTAR, and INTEGRAL observations of the symbiotic X-ray binary IGR J16194-2810 - Bozzo, E., Romano, P.,Ferrigno, C.,Ducci, L. (2024-01-01) http://ui.adsabs.harvard.edu/#abs/2024MNRAS.527.3585B The Galactic Bulge Diffuse Emission in Broadband X-Rays with NuSTAR - Perez, Kerstin, Krivonos, Roman,Wik, Daniel R. (2019-10-01) http://ui.adsabs.harvard.edu/#abs/2019ApJ...884..153P The INTEGRAL/IBIS AGN catalogue: an update - Malizia, A., Landi, R.,Molina, M.,Bassani, L.,Bazzano, A.,Bird, A. J.,Ubertini, P. (2016-07-01) http://ui.adsabs.harvard.edu/#abs/2016MNRAS.460...19M VerticaVertical position of the Sun with gamma-rays - Siegert, Thomas, (2019-12-01) http://ui.adsabs.harvard.edu/#abs/2019A&A...632L...1S Water megamaser emission in hard X-ray selected AGN - Panessa, F., Castangia, P.,Malizia, A.,Bassani, L.,Tarchi, A.,Bazzano, A.,Ubertini, P. (2020-09-01) http://ui.adsabs.harvard.edu/#abs/2020A&A...641A.162P X-ray absorption in INTEGRAL active galactic nuclei. Host galaxy inclination - Malizia, A., Bassani, L.,Stephen, J. B.,Bazzano, A.,Ubertini, P. (2020-07-01) http://ui.adsabs.harvard.edu/#abs/2020A&A...639A...5M
Temporal Coverage	2015-08-04T17:12:54Z / 2016-08-04T00:48:22Z
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	2025-03-25T09:54:38Z
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Revnivtsev, 2025, 'Catch Scorpius X-1 by the tail: high quality hard X-ray tail from monitoring observations of the brightest neutron star.', 1.0, European Space Agency, https://doi.org/10.57780/esa-8kx6qgx