A dataset provided by the European Space Agency

Name: Probing the nature of the circumstellar environment around periastron in SFXTs
Published: 2025-03-25T09:54:36Z

Proposal ID	0920016
Obs ID	09200160001, 09200160003, 09200160005
Title	Probing the nature of the circumstellar environment around periastron in SFXTs
Download Data Associated to the proposal	https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0920016
DOI	https://doi.org/10.57780/esa-tdxeovg
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 7 systems with known ephemeris using both XMM and INTEGRAL to measure the instantaneous accretion rate, emission spectrum and periodic signals generated around and on the neutron star. Now that the orbital parameters of these SFXT 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 ~1.7 Ms of INTEGRAL observations complemented with 140 ks of simultaneous XMM-Newton observatons.
Publications	Accurate localization and identification of six hard X-ray sources from Chandra and XMM-Newton data - Karasev, D. I., Lutovinov, A. A.,Revnivtsev, M. G.,Krivonos, R. A. (2012-10-01) http://ui.adsabs.harvard.edu/#abs/2012AstL...38..629K A possible cyclotron resonance scattering feature near 0.7 keV in X1822-371 - Iaria, R., Di Salvo, T.,Matranga, M.,Galiano, C. G.,D Ai, A.,Riggio, A.,Burderi, L.,Sanna, A.,Ferrigno, C.,Del Santo, M.,Pintore, F.,Robba, N. R. (2015-05-01) http://ui.adsabs.harvard.edu/#abs/2015A&A...577A..63I Apsidal motion and absolute parameters of GV Nor and V881 Sco based on mid-resolution spectroscopy and TESS photometry - Surgit, Derya, Zasche, Petr,Hadrava, Petr,Erdem, Ahmet,Engelbrecht, Chris A.,Marang, Fred,Masek, Martin,Stevens, Daniel J. (2023-03-01) http://ui.adsabs.harvard.edu/#abs/2023MNRAS.519.4699S 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 Burst-induced coronal cooling in GS 1826-24. The clock wagging its tail - Sanchez-Fernandez, C., Kajava, J. J. E.,Poutanen, J.,Kuulkers, E.,Suleimanov, V. F. (2020-02-01) http://ui.adsabs.harvard.edu/#abs/2020A&A...634A..58S 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 Constraints on positron annihilation kinematics in the inner Galaxy - Siegert, Thomas, Crocker, Roland M.,Diehl, Roland,Krause, Martin G. H.,Panther, Fiona H.,Pleintinger, Moritz M. M.,Weinberger, Christoph (2019-07-01) http://ui.adsabs.harvard.edu/#abs/2019A&A...627A.126S Determining the nature of faint X-ray sources from the ASCA Galactic center survey - Lutovinov, A. A., Revnivtsev, M. G.,Karasev, D. I.,Shimansky, V. V.,Burenin, R. A.,Bikmaev, I. F.,Vorob ev, V. S.,Tsygankov, S. S.,Pavlinsky, M. N. (2015-05-01) http://ui.adsabs.harvard.edu/#abs/2015AstL...41..179L 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 Discovery of blue companions to two southern Cepheids: WW Car and FN Vel - Kovtyukh, V., Szabados, L.,Chekhonadskikh, F.,Lemasle, B.,Belik, S. (2015-04-01) http://ui.adsabs.harvard.edu/#abs/2015MNRAS.448.3567K Dose Measured On-Board INTEGRAL After More Than 12 Years in Space - Claret, Arnaud, Laurent, Philippe,Sauvageon, Aymeric,Savchenko, Volodymyr (2015-12-01) http://ui.adsabs.harvard.edu/#abs/2015ITNS...62.2784C Dust-scattering Halo and Giant Hard X-Ray Flare from the Supergiant Fast X-Ray Transient IGR J16479-4514 Investigated with XMM-Newton and INTEGRAL - Sguera, V., Tiengo, A.,Sidoli, L.,Bird, A. J. (2020-09-01) http://ui.adsabs.harvard.edu/#abs/2020ApJ...900...22S Ephemeris, orbital decay, and masses of ten eclipsing high-mass X-ray binaries - Falanga, M., Bozzo, E.,Lutovinov, A.,Bonnet-Bidaud, J. M.,Fetisova, Y.,Puls, J. (2015-05-01) http://ui.adsabs.harvard.edu/#abs/2015A&A...577A.130F 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 Galactic survey of ⁴⁴Ti sources with the IBIS telescope onboard INTEGRAL - Tsygankov, Sergey S., Krivonos, Roman A.,Lutovinov, Alexander A.,Revnivtsev, Mikhail G.,Churazov, Eugene M.,Sunyaev, Rashid A.,Grebenev, Sergey A. (2016-06-01) http://ui.adsabs.harvard.edu/#abs/2016MNRAS.458.3411T 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 Gamma-ray spectroscopy of positron annihilation in the Milky Way - Siegert, Thomas, Diehl, Roland,Khachatryan, Gerasim,Krause, Martin G. H.,Guglielmetti, Fabrizia,Greiner, Jochen,Strong, Andrew W.,Zhang, Xiaoling (2016-02-01) http://ui.adsabs.harvard.edu/#abs/2016A&A...586A..84S Hard X-Ray Tail Discovered in the Clocked Burster GS 1826-238 - Rodi, J., Jourdain, E.,Roques, J. P. (2016-02-01) http://ui.adsabs.harvard.edu/#abs/2016ApJ...817..101R IGR J17463-2854, a possible symbiotic binary system in the galactic center region - Karasev, D. I., Tsygankov, S. S.,Lutovinov, A. A. (2015-08-01) http://ui.adsabs.harvard.edu/#abs/2015AstL...41..394K INTEGRAL 11-year hard X-ray survey above 100 keV - Krivonos, R., Tsygankov, S.,Lutovinov, A.,Revnivtsev, M.,Churazov, E.,Sunyaev, R. (2015-04-01) http://ui.adsabs.harvard.edu/#abs/2015MNRAS.448.3766K INTEGRAL and XMM-Newton observations of IGR J16418-4532: evidence of accretion regime transitions in a supergiant fast X-ray transient - Drave, S. P., Bird, A. J.,Sidoli, L.,Sguera, V.,McBride, V. A.,Hill, A. B.,Bazzano, A.,Goossens, M. E. (2013-07-01) http://ui.adsabs.harvard.edu/#abs/2013MNRAS.433..528D INTEGRAL Observations of Magnetars - Pacholski, Dominik Patryk, Ducci, Lorenzo,Topinka, Martin,Mereghetti, Sandro (2025-01-01) http://ui.adsabs.harvard.edu/#abs/2025AN....34640109P 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 Investigation of the energy dependence of the orbital light curve in LS 5039 - Chang, Z., Zhang, S.,Ji, L.,Chen, Y. P.,Kretschmar, P.,Kuulkers, E.,Collmar, W.,Liu, C. Z. (2016-11-01) http://ui.adsabs.harvard.edu/#abs/2016MNRAS.463..495C JEM-X/INTEGRAL X-ray survey of the galactic center region - Grebenev, S. A., Mereminskiy, I. A. (2015-12-01) http://ui.adsabs.harvard.edu/#abs/2015AstL...41..765G Leptonic origin of the 100 MeV γ-ray emission from the Galactic centre - Malyshev, D., Chernyakova, M.,Neronov, A.,Walter, R. (2015-10-01) http://ui.adsabs.harvard.edu/#abs/2015A&A...582A..11M Low mass X-ray binaries in the Inner Galaxy: implications for millisecond pulsars and the GeV excess - Haggard, Daryl, Heinke, Craig,Hooper, Dan,Linden, Tim (2017-05-01) http://ui.adsabs.harvard.edu/#abs/2017JCAP...05..056H Multicolour modelling of SN 2013dx associated with GRB 130702A^★ - Volnova, A. A., Pruzhinskaya, M. V.,Pozanenko, A. S.,Blinnikov, S. I.,Minaev, P. Yu.,Burkhonov, O. A.,Chernenko, A. M.,Ehgamberdiev, Sh. A.,Inasaridze, R.,Jelinek, M.,Khorunzhev, G. A.,Klunko, E. V.,Krugly, Yu. N.,Mazaeva, E. D.,Rumyantsev, V. V.,Volvach, A. E. (2017-05-01) http://ui.adsabs.harvard.edu/#abs/2017MNRAS.467.3500V Multi-wavelength Study of HESS J1741-302 - Hare, Jeremy, Rangelov, Blagoy,Sonbas, Eda,Kargaltsev, Oleg,Volkov, Igor (2016-01-01) http://ui.adsabs.harvard.edu/#abs/2016ApJ...816...52H Neutron star masses from hydrodynamical effects in obscured supergiant high mass X-ray binaries - Manousakis, A., Walter, R.,Blondin, J. M. (2012-11-01) http://ui.adsabs.harvard.edu/#abs/2012A&A...547A..20M 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 New interpretation of the two hard X-ray sources IGR J17503-2636 and IGR J17507-2647 - Sidoli, L., Sguera, V.,Esposito, P.,Sathyaprakash, R.,Ponti, G.,Mondal, S.,Bird, A. J. (2025-01-01) http://ui.adsabs.harvard.edu/#abs/2025A&A...693A..45S New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant - Riess, Adam G., Casertano, Stefano,Yuan, Wenlong,Macri, Lucas,Anderson, Jay,MacKenty, John W.,Bowers, J. Bradley,Clubb, Kelsey I.,Filippenko, Alexei V.,Jones, David O.,Tucker, Brad E. (2018-03-01) http://ui.adsabs.harvard.edu/#abs/2018ApJ...855..136R NuSTAR and INTEGRAL Observations of a Low/Hard State of 1E1740.7-2942 - Natalucci, Lorenzo, Tomsick, John A.,Bazzano, Angela,Smith, David M.,Bachetti, Matteo,Barret, Didier,Boggs, Steven E.,Christensen, Finn E.,Craig, William W.,Fiocchi, Mariateresa,Furst, Felix,Grefenstette, Brian W.,Hailey, Charles J.,Harrison, Fiona A.,Krivonos, Roman,Kuulkers, Erik,Miller, Jon M.,Pottschmidt, Katja,Stern, Daniel,Ubertini, Pietro,Walton, Dominic J.,Zhang, William W. (2014-01-01) http://ui.adsabs.harvard.edu/#abs/2014ApJ...780...63N On the Puzzling High-Energy Pulsations of the Energetic Radio-Quiet γ-Ray Pulsar J1813-1246 - Marelli, M., Harding, A.,Pizzocaro, D.,De Luca, A.,Wood, K. S.,Caraveo, P.,Salvetti, D.,Saz Parkinson, P. M.,Acero, F. (2014-11-01) http://ui.adsabs.harvard.edu/#abs/2014ApJ...795..168M Orbital variations in intensity and spectral properties of the highly obscured sgHMXB IGR J16318-4848 - Iyer, Nirmal, Paul, Biswajit (2017-10-01) http://ui.adsabs.harvard.edu/#abs/2017MNRAS.471..355I Phase-resolved hard X-ray emission of the high-mass binary LS 5039: a spectral hardening above 50 keV detected with INTEGRAL - Falanga, M., Bykov, A. M.,Li, Z.,Krassilchtchikov, A. M.,Petrov, A. E.,Bozzo, E. (2021-10-01) http://ui.adsabs.harvard.edu/#abs/2021A&A...654A.127F Phase-resolved X-Ray Spectra of Magnetars and the Coronal Outflow Model - Hascoet, Romain, Beloborodov, Andrei M.,den Hartog, Peter R. (2014-05-01) http://ui.adsabs.harvard.edu/#abs/2014ApJ...786L...1H QPO and LFN in the power spectrum of rapid variability for the X-ray nova SWIFT J174510.8-262411 - Prosvetov, A. V., Grebenev, S. A. (2015-10-01) http://ui.adsabs.harvard.edu/#abs/2015AstL...41..549P Search for 511 keV emission in satellite galaxies of the Milky Way with INTEGRAL/SPI - Siegert, Thomas, Diehl, Roland,Vincent, Aaron C.,Guglielmetti, Fabrizia,Krause, Martin G. H.,Boehm, Celine (2016-10-01) http://ui.adsabs.harvard.edu/#abs/2016A&A...595A..25S Searching for orbital period modulation in X-ray observations of the symbiotic X-ray binary GX 1+4 - Klawin, Moritz, Ducci, Lorenzo,Mirac Serim, M.,Santangelo, Andrea,Ferrigno, Carlo,Bozzo, Enrico (2024-12-01) http://ui.adsabs.harvard.edu/#abs/2024A&A...692A..19K Searching for supergiant fast X-ray transients with Swift - Romano, P., Bozzo, E.,Esposito, P.,Sbarufatti, B.,Haberl, F.,Ponti, G.,D Avanzo, P.,Ducci, L.,Segreto, A.,Jin, C.,Masetti, N.,Del Santo, M.,Campana, S.,Mangano, V. (2016-09-01) http://ui.adsabs.harvard.edu/#abs/2016A&A...593A..96R Sgr B2 hard X-ray emission with INTEGRAL after 2009: still detectable? - Kuznetsova, Ekaterina, Krivonos, Roman,Lutovinov, Alexander,Clavel, Maica (2022-01-01) http://ui.adsabs.harvard.edu/#abs/2022MNRAS.509.1605K Spectral and timing evolution of the bright failed outburst of the transient black hole Swift J174510.8-262411 - Del Santo, M., Belloni, T. M.,Tomsick, J. A.,Sbarufatti, B.,Cadolle Bel, M.,Casella, P.,Castro-Tirado, A.,Corbel, S.,Grinberg, V.,Homan, J.,Kalemci, E.,Motta, S.,Munoz-Darias, T.,Pottschmidt, K.,Rodriguez, J.,Wilms, J. (2016-03-01) http://ui.adsabs.harvard.edu/#abs/2016MNRAS.456.3585D SRGA J181414.6-225604: A New Galactic Symbiotic X-Ray Binary Outburst Triggered by an Intense Mass-loss Episode of a Heavily Obscured Mira Variable - De, Kishalay, Mereminskiy, Ilya,Soria, Roberto,Conroy, Charlie,Kara, Erin,Anand, Shreya,Ashley, Michael C. B.,Boyer, Martha L.,Chakrabarty, Deepto,Grefenstette, Brian,Hankins, Matthew J.,Hillenbrand, Lynne A.,Jencson, Jacob E.,Karambelkar, Viraj,Kasliwal, Mansi M.,Lau, Ryan M.,Lutovinov, Alexander,Moore, Anna M.,Ng, Mason,Panagiotou, Christos,Pasham, Dheeraj R.,Semena, Andrey,Simcoe, Robert,Soon, Jamie,Srinivasaragavan, Gokul P.,Travouillon, Tony,Yao, Yuhan (2022-08-01) http://ui.adsabs.harvard.edu/#abs/2022ApJ...935...36D ⁴⁴Ti ejecta in young supernova remnants - Weinberger, Christoph, Diehl, Roland,Pleintinger, Moritz M. M.,Siegert, Thomas,Greiner, Jochen (2020-06-01) http://ui.adsabs.harvard.edu/#abs/2020A&A...638A..83W Tandem Swift and INTEGRAL Data to Revisit the Orbital and Superorbital Periods of 1E 1740.7-2942 - Stecchini, Paulo Eduardo, Castro, Manuel,Jablonski, Francisco,D Amico, Flavio,Braga, Joao (2017-07-01) http://ui.adsabs.harvard.edu/#abs/2017ApJ...843L..10S The efficiency of nuclear burning during thermonuclear (Type I) bursts as a function of accretion rate - Cavecchi, Y., Galloway, D. K.,Goodwin, A. J.,Johnston, Z.,Heger, A. (2020-12-01) http://ui.adsabs.harvard.edu/#abs/2020MNRAS.499.2148C The failed state transition of the ATOLL source GRS 1724-308 - Tarana, A., Capitanio, F.,Cocchi, M. (2018-07-01) http://ui.adsabs.harvard.edu/#abs/2018MNRAS.477.3353T The first study of 54 new eccentric eclipsing binaries in our Galaxy - Zasche, P., Wolf, M.,Uhlar, R.,Cagas, P.,Jurysek, J.,Masek, M.,Honkova, K.,Kucakova, H.,Lehky, M.,Kotkova, L.,White, G. J.,Bewsher, D.,Tylsar, M.,Jelinek, M.,Paschke, A. (2018-11-01) http://ui.adsabs.harvard.edu/#abs/2018A&A...619A..85Z 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 Galactic ²⁶Al Emission Map as Revealed by INTEGRAL SPI - Bouchet, Laurent, Jourdain, Elisabeth,Roques, Jean-Pierre (2015-03-01) http://ui.adsabs.harvard.edu/#abs/2015ApJ...801..142B 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 The Study of Triple Systems V949 Cen, V358 Pup and V1055 Sco - Zasche, P., Honkova, K.,Jurysek, J.,Masek, M. (2015-06-01) http://ui.adsabs.harvard.edu/#abs/2015AcA....65..151Z Type I X-ray Bursts Detected by the JEM-X Telescope Onboard the INTEGRAL Observatory in 2003-2015 - Chelovekov, I. V., Grebenev, S. A.,Mereminskiy, I. A.,Prosvetov, A. V. (2017-12-01) http://ui.adsabs.harvard.edu/#abs/2017AstL...43..781C Unveiling the nature of INTEGRAL objects through optical spectroscopy. X. A new multi-year, multi-observatory campaign - Masetti, N., Parisi, P.,Palazzi, E.,Jimenez-Bailon, E.,Chavushyan, V.,McBride, V.,Rojas, A. F.,Steward, L.,Bassani, L.,Bazzano, A.,Bird, A. J.,Charles, P. A.,Galaz, G.,Landi, R.,Malizia, A.,Mason, E.,Minniti, D.,Morelli, L.,Schiavone, F.,Stephen, J. B.,Ubertini, P. (2013-08-01) http://ui.adsabs.harvard.edu/#abs/2013A&A...556A.120M Unveiling the short and faint X-ray transient nature of IGR J17419-2802 - Sguera, V., Sidoli, L. (2024-10-01) http://ui.adsabs.harvard.edu/#abs/2024A&A...690A.260S Variability of the symbiotic X-ray binary GX 1+4. Enhanced activity near periastron passage - Ilkiewicz, Krystian, Mikolajewska, Joanna,Monard, Berto (2017-05-01) http://ui.adsabs.harvard.edu/#abs/2017A&A...601A.105I 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 XMM-Newton and Swift observations of supergiant high mass X-ray binaries - Ferrigno, C., Bozzo, E.,Romano, P. (2022-08-01) http://ui.adsabs.harvard.edu/#abs/2022A&A...664A..99F XMMU J181227.8-181234: a new ultracompact X-ray binary candidate - Goodwin, A. J., Galloway, D. K.,in t Zand, J. J. M.,Kuulkers, E.,Bilous, A.,Keek, L. (2019-07-01) http://ui.adsabs.harvard.edu/#abs/2019MNRAS.486.4149G 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 X-ray burst-induced spectral variability in 4U 1728-34 - Kajava, J. J. E., Sanchez-Fernandez, C.,Kuulkers, E.,Poutanen, J. (2017-03-01) http://ui.adsabs.harvard.edu/#abs/2017A&A...599A..89K X-Ray Observations of the Isolated Black Hole Candidate OGLE-2011-BLG-0462 and Other Collapsed Objects Discovered through Gravitational Microlensing - Mereghetti, S., Sidoli, L.,Ponti, G.,Treves, A. (2022-07-01) http://ui.adsabs.harvard.edu/#abs/2022ApJ...934...62M
Temporal Coverage	2012-08-21T04:06:11Z / 2012-09-17T01:12:06Z
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	2025-03-25T09:54:36Z
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Drave, 2025, 'Probing the nature of the circumstellar environment around periastron in SFXTs ', 1.0, European Space Agency, https://doi.org/10.57780/esa-tdxeovg