A dataset provided by the European Space Agency

Name: INTEGRAL observations of A 0535+26 in outburst
Published: 2026-03-05T13:05:57Z

Proposal ID	0840017
Obs ID	08400170001, 08400170002, 08400170003, 08400170004, 08400170005, 08400170006, 08400170007, 08400170008
Title	INTEGRAL observations of A 0535+26 in outburst
Download Data Associated to the proposal	https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0840017
DOI	https://doi.org/10.57780/esa-9n2y5pq
Author	Caballero
Abstract	We propose to observe the Be/X-ray binary system A 0535+26 in the case it presents a normal and a giant outburst, monitoring the rise to the peak and the descending part of the outburst. In the case of a giant outburst, one main goal will be to study the luminosity dependence of the cyclotron energy. For the first time, high accuracy measurements at high luminosities of the cyclotron energy in A0535+26 will allow to test the hypothesis of a change in the height in the accretion column caused by an increase in the mass accretion rate. If the source enters a normal outburst, another important goal will be to study possible magnetospheric instabilities, which have recently been discovered for this source. Non-stationary accretion can be probed using INTEGRAL capabilities, which will allow to monitor the cyclotron line energy, to perform a precise timing analysis and to study the pulse profile evolution with time and luminosity. Recent observations of two normal outbursts with INTEGRAL have revealed new unexpected features, making observations of normal outbursts extremely useful tools to study the onset of the accretion onto a neutron star at low accretion rates.
Publications	A comprehensive analysis of the hard X-ray spectra of bright Seyfert galaxies - Lubinski, P., Beckmann, V.,Gibaud, L.,Paltani, S.,Papadakis, I. E.,Ricci, C.,Soldi, S.,Turler, M.,Walter, R.,Zdziarski, A. A. (2016-05-01) http://ui.adsabs.harvard.edu/#abs/2016MNRAS.458.2454L A photometric study of two neglected eclipsing binaries - Kudak, V., Fedurco, M.,Perig, V.,Parimucha, S. (2021-08-01) http://ui.adsabs.harvard.edu/#abs/2021RAA....21..174K A recent change in the optical and γ-ray polarization of the Crab nebula and pulsar - Moran, P., Kyne, G.,Gouiffes, C.,Laurent, P.,Hallinan, G.,Redfern, R. M.,Shearer, A. (2016-03-01) http://ui.adsabs.harvard.edu/#abs/2016MNRAS.456.2974M 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 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 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 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 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/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 Kinematics of massive star ejecta in the Milky Way as traced by ²⁶Al - Kretschmer, Karsten, Diehl, Roland,Krause, Martin,Burkert, Andreas,Fierlinger, Katharina,Gerhard, Ortwin,Greiner, Jochen,Wang, Wei (2013-11-01) http://ui.adsabs.harvard.edu/#abs/2013A&A...559A..99K 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 Multiwavelength observation of 1A 0535+262=HD 245770 from 2010 to 2021 - Liu, Wei, Yan, Jingzhi,Xiao, Guangcheng,Li, Xiukun,Gao, Bo,Liu, Qingzhong (2024-01-01) http://ui.adsabs.harvard.edu/#abs/2024A&A...681A..10L 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 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 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 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 INTEGRAL/IBIS AGN catalogue - I. X-ray absorption properties versus optical classification - Malizia, A., Bassani, L.,Bazzano, A.,Bird, A. J.,Masetti, N.,Panessa, F.,Stephen, J. B.,Ubertini, P. (2012-11-01) http://ui.adsabs.harvard.edu/#abs/2012MNRAS.426.1750M The INTEGRAL/SPI view of A0535+26 during the Giant Outburst of 2011 February - Sartore, N., Jourdain, E.,Roques, J. P. (2015-06-01) http://ui.adsabs.harvard.edu/#abs/2015ApJ...806..193S The spectral catalogue of INTEGRAL gamma-ray bursts. results of the joint IBIS/SPI spectral analysis - Bosnjak, Z., Gotz, D.,Bouchet, L.,Schanne, S.,Cordier, B. (2014-01-01) http://ui.adsabs.harvard.edu/#abs/2014A&A...561A..25B Timing properties of gamma-ray bursts detected by SPI-ACS detector onboard INTEGRAL - Savchenko, V., Neronov, A.,Courvoisier, T. J. -L. (2012-05-01) http://ui.adsabs.harvard.edu/#abs/2012A&A...541A.122S 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 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 X-Ray and Optical Observations of A 0535+26 - Camero-Arranz, A., Finger, M. H.,Wilson-Hodge, C. A.,Jenke, P.,Steele, I.,Coe, M. J.,Gutierrez-Soto, J.,Kretschmar, P.,Caballero, I.,Yan, J.,Rodriguez, J.,Suso, J.,Case, G.,Cherry, M. L.,Guiriec, S.,McBride, V. A. (2012-07-01) http://ui.adsabs.harvard.edu/#abs/2012ApJ...754...20C
Temporal Coverage	2011-02-23T21:38:53Z / 2011-03-17T15:32:28Z
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	2026-03-05T13:05:57Z
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, Caballero, 2026, 'INTEGRAL observations of A 0535+26 in outburst', 1.0, European Space Agency, https://doi.org/10.57780/esa-9n2y5pq