A dataset provided by the European Space Agency

Name: Unveiling the Nature of the hard X-ray excess in the Coma cluster
Published: 2026-03-05T13:05:56Z

Proposal ID	0620007
Obs ID	06200070001, 06200070002, 06200070003
Title	Unveiling the Nature of the hard X-ray excess in the Coma cluster
Download Data Associated to the proposal	https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0620007
DOI	https://doi.org/10.57780/esa-ry91ijd
Author	Eckert
Abstract	The presence of excess emission from the Coma cluster above 10 keV has been claimed from BeppoSAX and RXTE observations. However, an independent analysis of the same BeppoSAX data by another group still casts doubts on this result. Confirmation of this result is of prime importance to study the population of relativistic electrons, to measure directly the magnetic field in the cluster and to understand the state of the gas in the cluster. Existing INTEGRAL data (1 Ms) allowed us to to identify a region South-West of the cluster core in excess compared to the 1-10 keV profile. We found that the position of the excess coincides with the 1.4 GHz radio peak, which strongly suggests that the emission from this region is non-thermal. However, it is not yet possible to exclude the possibility that the emission is due to very hot thermal gas. Therefore, we propose another 1 Ms INTEGRAL observation of the Coma cluster, that will allow usto detect the source up to 80 keV in order to reveal the nature of the excess. Moreover, we will be able to better characterize the morphology of the cluster above 18 keV, and study more extensively the high-energy emitting region discovered in existing INTEGRAL data, which is a unique use of INTEGRAL?s imaging capabilities.
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 new look inside planetary nebula LoTr 5: a long-period binary with hints of a possible third component - Aller, A., Lillo-Box, J.,Vuckovic, M.,Van Winckel, H.,Jones, D.,Montesinos, B.,Zorotovic, M.,Miranda, L. F. (2018-05-01) http://ui.adsabs.harvard.edu/#abs/2018MNRAS.476.1140A An infrared study of Galactic OH/IR stars - III. Variability properties of the Arecibo sample - Jimenez-Esteban, F. M., Engels, D.,Aguado, D. S.,Gonzalez, J. B.,Garcia-Lario, P. (2021-08-01) http://ui.adsabs.harvard.edu/#abs/2021MNRAS.505.6051J 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 Broad-band study of hard X-ray-selected absorbed active galactic nuclei - de Rosa, A., Panessa, F.,Bassani, L.,Bazzano, A.,Bird, A.,Landi, R.,Malizia, A.,Molina, M.,Ubertini, P. (2012-03-01) http://ui.adsabs.harvard.edu/#abs/2012MNRAS.420.2087D Catalog of short gamma-ray transients detected in the SPI/INTEGRAL experiment - Minaev, P. Yu., Pozanenko, A. S.,Molkov, S. V.,Grebenev, S. A. (2014-05-01) http://ui.adsabs.harvard.edu/#abs/2014AstL...40..235M 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 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 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 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 High-energy emission processes in M87 - de Jong, S., Beckmann, V.,Soldi, S.,Tramacere, A.,Gros, A. (2015-07-01) http://ui.adsabs.harvard.edu/#abs/2015MNRAS.450.4333D 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/IBIS 7-year All-Sky Hard X-Ray Survey. II. Catalog of sources - Krivonos, R., Tsygankov, S.,Revnivtsev, M.,Grebenev, S.,Churazov, E.,Sunyaev, R. (2010-11-01) http://ui.adsabs.harvard.edu/#abs/2010A&A...523A..61K INTEGRAL/IBIS 7-year All-Sky Hard X-ray Survey. I. Image reconstruction - Krivonos, R., Revnivtsev, M.,Tsygankov, S.,Sazonov, S.,Vikhlinin, A.,Pavlinsky, M.,Churazov, E.,Sunyaev, R. (2010-09-01) http://ui.adsabs.harvard.edu/#abs/2010A&A...519A.107K 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 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 Precursors of short gamma-ray bursts detected by the INTEGRAL observatory - Minaev, Pavel, Pozanenko, Alexei,Molkov, Sergei (2018-01-01) http://ui.adsabs.harvard.edu/#abs/2018IJMPD..2744013M Progressive steepening of the SNR RX J1713.7-3946 X-ray spectrum from XMM-Newton to INTEGRAL - Kuznetsova, Ekaterina, Krivonos, Roman,Churazov, Eugene,Lyskova, Natalia,Lutovinov, Alexander (2019-10-01) http://ui.adsabs.harvard.edu/#abs/2019MNRAS.489.1828K 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 Spatial clustering and halo occupation distribution modelling of local AGN via cross-correlation measurements with 2MASS galaxies - Krumpe, Mirko, Miyaji, Takamitsu,Coil, Alison L.,Aceves, Hector (2018-02-01) http://ui.adsabs.harvard.edu/#abs/2018MNRAS.474.1773K 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 catalog of variable sources detected by INTEGRAL. I. Catalog and techniques - Telezhinsky, I., Eckert, D.,Savchenko, V.,Neronov, A.,Produit, N.,Courvoisier, T. J. -L. (2010-11-01) http://ui.adsabs.harvard.edu/#abs/2010A&A...522A..68T The Deep Look at the Hard X-Ray Sky: The Swift-INTEGRAL X-Ray (SIX) Survey - Bottacini, Eugenio, Ajello, Marco,Greiner, Jochen (2012-08-01) http://ui.adsabs.harvard.edu/#abs/2012ApJS..201...34B The first GRB survey of the IBIS/PICsIT archive - Bianchin, V., Mereghetti, S.,Guidorzi, C.,Foschini, L.,Vianello, G.,Malaguti, G.,Di Cocco, G.,Gianotti, F.,Schiavone, F. (2011-12-01) http://ui.adsabs.harvard.edu/#abs/2011A&A...536A..46B 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 IBIS Soft Gamma-Ray Sky after 1000 Integral Orbits - Bird, A. J., Bazzano, A.,Malizia, A.,Fiocchi, M.,Sguera, V.,Bassani, L.,Hill, A. B.,Ubertini, P.,Winkler, C. (2016-03-01) http://ui.adsabs.harvard.edu/#abs/2016ApJS..223...15B 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 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 Time Evolution of Flares in GRB 130925A: Jet Precession in a Black Hole Accretion System - Hou, Shu-Jin, Liu, Tong,Gu, Wei-Min,Lin, Da-Bin,Sun, Mou-Yuan,Wu, Xue-Feng,Lu, Ju-Fu (2014-01-01) http://ui.adsabs.harvard.edu/#abs/2014ApJ...781L..19H 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 XMM-Newton and Swift observations prove GRB090709A to be a distant, standard, long GRB - de Luca, A., Esposito, P.,Israel, G. L.,Gotz, D.,Novara, G.,Tiengo, A.,Mereghetti, S. (2010-03-01) http://ui.adsabs.harvard.edu/#abs/2010MNRAS.402.1870D 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	2009-05-05T07:41:08Z / 2009-07-13T18:28:54Z
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	2026-03-05T13:05:56Z
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, Eckert, 2026, 'Unveiling the Nature of the hard X-ray excess in the Coma cluster', 1.0, European Space Agency, https://doi.org/10.57780/esa-ry91ijd