A dataset provided by the European Space Agency

Name: Spectral variability of NGC 5548 - pivoting or two components?
Published: 2025-03-25T09:54:30Z

Proposal ID	0220151
Obs ID	02201510001
Title	Spectral variability of NGC 5548 - pivoting or two components?
Download Data Associated to the proposal	https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0220151
DOI	https://doi.org/10.57780/esa-rrmhx3s
Author	McHardy
Abstract	It has been known for many years that the X-ray spectral indices ofSeyfert galaxies in the 2-10 keV band become steeper as the fluxincreases. Recently we, and others, have defined the shape of theflux/spectral index relationship very precisely and, in particular, itis noted that the spectral index reaches an asymptotic level at highfluxes.There are two main possible explanations for this relationship. Thefirst possibility is that the spectrum could consist of twocomponents, a relatively hard component of approximately constantflux, and a soft component of variable flux. The second possibilityis that there is intrinsic spectral variability in the component whichdominates the X-ray flux, such that the spectrum does becomeintrinsically softer at high fluxes, perhaps pivoting about some highenergy (100keV).Determining which possibility is actually the case has importantimplications for the physics of the high energy emission regionand is the main aim of the present proposal. Integral is ideallysuited to this programme.
Publications	20-100 keV properties of cataclysmic variables detected in the INTEGRAL/IBIS survey - Barlow, E. J., Knigge, C.,Bird, A. J.,J Dean, A.,Clark, D. J.,Hill, A. B.,Molina, M.,Sguera, V. (2006-10-01) http://ui.adsabs.harvard.edu/#abs/2006MNRAS.372..224B A deep INTEGRAL hard X-ray survey of the 3C 273/Coma region - Paltani, S., Walter, R.,McHardy, I. M.,Dwelly, T.,Steiner, C.,Courvoisier, T. J. -L. (2008-07-01) http://ui.adsabs.harvard.edu/#abs/2008A&A...485..707P A description of sources detected by INTEGRAL during the first 4 years of observations - Bodaghee, A., Courvoisier, T. J. -L.,Rodriguez, J.,Beckmann, V.,Produit, N.,Hannikainen, D.,Kuulkers, E.,Willis, D. R.,Wendt, G. (2007-05-01) http://ui.adsabs.harvard.edu/#abs/2007A&A...467..585B Analysis and interpretation of inner-heliospheric SEP events with the ESA Standard Radiation Environment Monitor (SREM) onboard the INTEGRAL and Rosetta Missions - Georgoulis, Manolis K., Papaioannou, Athanasios,Sandberg, Ingmar,Anastasiadis, Anastasios,Daglis, Ioannis A.,Rodriguez-Gasen, Rosa,Aran, Angels,Sanahuja, Blai,Nieminen, Petteri (2018-09-01) http://ui.adsabs.harvard.edu/#abs/2018JSWSC...8A..40G An asymmetric distribution of positrons in the Galactic disk revealed by γ-rays - Weidenspointner, Georg, Skinner, Gerry,Jean, Pierre,Knodlseder, Jurgen,von Ballmoos, Peter,Bignami, Giovanni,Diehl, Roland,Strong, Andrew W.,Cordier, Bertrand,Schanne, Stephane,Winkler, Christoph (2008-01-01) http://ui.adsabs.harvard.edu/#abs/2008Natur.451..159W 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 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 dark matter and the shape of the Milky Way dark halo from the 511-keV line - Ascasibar, Y., Jean, P.,Boehm, C.,Knodlseder, J. (2006-06-01) http://ui.adsabs.harvard.edu/#abs/2006MNRAS.368.1695A 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 Contribution of the Accretion Disk, Hot Corona, and Obscuring Torus to the Luminosity of Seyfert Galaxies: INTEGRAL and Spitzer Observations - Sazonov, S., Willner, S. P.,Goulding, A. D.,Hickox, R. C.,Gorjian, V.,Werner, M. W.,Churazov, E.,Krivonos, R.,Revnivtsev, M.,Sunyaev, R.,Jones, C.,Murray, S. S.,Vikhlinin, A.,Fabian, A. C.,Forman, W. R. (2012-10-01) http://ui.adsabs.harvard.edu/#abs/2012ApJ...757..181S Detection of the high-energy cut-off from the Seyfert 1.5 galaxy NGC 5273 - Pahari, Mayukh, McHardy, I. M.,Mallick, Labani,Dewangan, G. C.,Misra, R. (2017-09-01) http://ui.adsabs.harvard.edu/#abs/2017MNRAS.470.3239P Diffuse Emission Measurement with the SPectrometer on INTEGRAL as an Indirect Probe of Cosmic-Ray Electrons and Positrons - Bouchet, Laurent, Strong, Andrew W.,Porter, Troy A.,Moskalenko, Igor V.,Jourdain, Elisabeth,Roques, Jean-Pierre (2011-09-01) http://ui.adsabs.harvard.edu/#abs/2011ApJ...739...29B 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 the Radio and X-Ray Counterpart of TeV γ-Ray Source HESS J1731-347 - Tian, W. W., Leahy, D. A.,Haverkorn, M.,Jiang, B. (2008-06-01) http://ui.adsabs.harvard.edu/#abs/2008ApJ...679L..85T 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 Extended emission from short gamma-ray bursts detected with SPI-ACS/INTEGRAL - Minaev, P. Yu., Pozanenko, A. S.,Loznikov, V. M. (2010-10-01) http://ui.adsabs.harvard.edu/#abs/2010AstL...36..707M 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 Global characteristics of GRBs observed with INTEGRAL and the inferred large population of low-luminosity GRBs - Foley, S., McGlynn, S.,Hanlon, L.,McBreen, S.,McBreen, B. (2008-06-01) http://ui.adsabs.harvard.edu/#abs/2008A&A...484..143F Hard X-ray bursts detected by the IBIS telescope onboard the INTEGRAL observatory in 2003 2004 - Chelovekov, I. V., Grebenev, S. A.,Sunyaev, R. A. (2006-07-01) http://ui.adsabs.harvard.edu/#abs/2006AstL...32..456C Hard X-ray emission from the Galactic ridge - Krivonos, R., Revnivtsev, M.,Churazov, E.,Sazonov, S.,Grebenev, S.,Sunyaev, R. (2007-03-01) http://ui.adsabs.harvard.edu/#abs/2007A&A...463..957K Hard X-ray properties of magnetic cataclysmic variables - Scaringi, S., Bird, A. J.,Norton, A. J.,Knigge, C.,Hill, A. B.,Clark, D. J.,Dean, A. J.,McBride, V. A.,Barlow, E. J.,Bassani, L.,Bazzano, A.,Fiocchi, M.,Landi, R. (2010-02-01) http://ui.adsabs.harvard.edu/#abs/2010MNRAS.401.2207S 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/IBIS all-sky survey in hard X-rays - Krivonos, R., Revnivtsev, M.,Lutovinov, A.,Sazonov, S.,Churazov, E.,Sunyaev, R. (2007-11-01) http://ui.adsabs.harvard.edu/#abs/2007A&A...475..775K INTEGRAL/IBIS and Swift/XRT observations of hard cataclysmic variables - Landi, R., Bassani, L.,Dean, A. J.,Bird, A. J.,Fiocchi, M.,Bazzano, A.,Nousek, J. A.,Osborne, J. P. (2009-01-01) http://ui.adsabs.harvard.edu/#abs/2009MNRAS.392..630L INTEGRAL IBIS Census of the Sky Beyond 100 keV - Bazzano, A., Stephen, J. B.,Fiocchi, M.,Bird, A. J.,Bassani, L.,Dean, A. J.,Malizia, A.,Ubertini, P.,Lebrun, F.,Walter, R.,Winkler, C. (2006-09-01) http://ui.adsabs.harvard.edu/#abs/2006ApJ...649L...9B INTEGRAL IBIS Extragalactic Survey: Active Galactic Nuclei Selected at 20-100 keV - Bassani, L., Molina, M.,Malizia, A.,Stephen, J. B.,Bird, A. J.,Bazzano, A.,Belanger, G.,Dean, A. J.,De Rosa, A.,Laurent, P.,Lebrun, F.,Ubertini, P.,Walter, R. (2006-01-01) http://ui.adsabs.harvard.edu/#abs/2006ApJ...636L..65B INTEGRAL SPI All-Sky View in Soft Gamma Rays: A Study of Point-Source and Galactic Diffuse Emission - Bouchet, L., Jourdain, E.,Roques, J. -P.,Strong, A.,Diehl, R.,Lebrun, F.,Terrier, R. (2008-06-01) http://ui.adsabs.harvard.edu/#abs/2008ApJ...679.1315B 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 Masses and accretion rates of supermassive black holes in active galactic nuclei from the INTEGRAL survey - Khorunzhev, G. A., Sazonov, S. Yu.,Burenin, R. A.,Tkachenko, A. Yu. (2012-08-01) http://ui.adsabs.harvard.edu/#abs/2012AstL...38..475K 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 INTEGRAL sources and TeV emission - Walter, Roland, (2007-06-01) http://ui.adsabs.harvard.edu/#abs/2007Ap&SS.309....5W On the Morphology of the Electron-Positron Annihilation Emission as Seen by Spi/integral - Bouchet, L., Roques, J. P.,Jourdain, E. (2010-09-01) http://ui.adsabs.harvard.edu/#abs/2010ApJ...720.1772B Probing clumpy stellar winds with a neutron star - Walter, R., Zurita Heras, J. (2007-12-01) http://ui.adsabs.harvard.edu/#abs/2007A&A...476..335W 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 Radioactive ²⁶Al from massive stars in the Galaxy - Diehl, Roland, Halloin, Hubert,Kretschmer, Karsten,Lichti, Giselher G.,Schonfelder, Volker,Strong, Andrew W.,von Kienlin, Andreas,Wang, Wei,Jean, Pierre,Knodlseder, Jurgen,Roques, Jean-Pierre,Weidenspointner, Georg,Schanne, Stephane,Hartmann, Dieter H.,Winkler, Christoph,Wunderer, Cornelia (2006-01-01) http://ui.adsabs.harvard.edu/#abs/2006Natur.439...45D Radioactive ²⁶Al from the Scorpius-Centaurus association - Diehl, R., Lang, M. G.,Martin, P.,Ohlendorf, H.,Preibisch, Th.,Voss, R.,Jean, P.,Roques, J. -P.,von Ballmoos, P.,Wang, W. (2010-11-01) http://ui.adsabs.harvard.edu/#abs/2010A&A...522A..51D Reflection in Seyfert galaxies and the unified model of AGN - Ricci, C., Walter, R.,Courvoisier, T. J. -L.,Paltani, S. (2011-08-01) http://ui.adsabs.harvard.edu/#abs/2011A&A...532A.102R 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 Search for outbursts in the narrow 511-keV line from compact sources based on INTEGRAL data - Tsygankov, S. S., Churazov, E. M. (2010-04-01) http://ui.adsabs.harvard.edu/#abs/2010AstL...36..237T Searching for the 511 keV annihilation line from galactic compact objects with the IBIS gamma ray telescope - De Cesare, G., (2011-07-01) http://ui.adsabs.harvard.edu/#abs/2011A&A...531A..56D 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 Spectral and intensity variations of Galactic ²⁶Al emission - Wang, W., Lang, M. G.,Diehl, R.,Halloin, H.,Jean, P.,Knodlseder, J.,Kretschmer, K.,Martin, P.,Roques, J. P.,Strong, A. W.,Winkler, C.,Zhang, X. L. (2009-03-01) http://ui.adsabs.harvard.edu/#abs/2009A&A...496..713W SPI observations of the diffuse ⁶⁰Fe emission in the Galaxy - Wang, W., Harris, M. J.,Diehl, R.,Halloin, H.,Cordier, B.,Strong, A. W.,Kretschmer, K.,Knodlseder, J.,Jean, P.,Lichti, G. G.,Roques, J. P.,Schanne, S.,von Kienlin, A.,Weidenspointner, G.,Wunderer, C. (2007-07-01) http://ui.adsabs.harvard.edu/#abs/2007A&A...469.1005W Study of Long-lived Radioactive Sources in the Galaxy with INTEGRAL/SPI - Wang, Wei, (2008-01-01) http://ui.adsabs.harvard.edu/#abs/2008PASP..120..118W 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 ²⁶Al in the inner Galaxy. Large-scale spectral characteristics derived with SPI/INTEGRAL - Diehl, R., Halloin, H.,Kretschmer, K.,Strong, A. W.,Wang, W.,Jean, P.,Lichti, G. G.,Knodlseder, J.,Roques, J. -P.,Schanne, S.,Schonfelder, V.,von Kienlin, A.,Weidenspointner, G.,Winkler, C.,Wunderer, C. (2006-04-01) http://ui.adsabs.harvard.edu/#abs/2006A&A...449.1025D 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 The 1st INTEGRAL SPI-ACS gamma-ray burst catalogue - Rau, A., Kienlin, A. V.,Hurley, K.,Lichti, G. G. (2005-08-01) http://ui.adsabs.harvard.edu/#abs/2005A&A...438.1175R 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 Fourth IBIS/ISGRI Soft Gamma-ray Survey Catalog - Bird, A. J., Bazzano, A.,Bassani, L.,Capitanio, F.,Fiocchi, M.,Hill, A. B.,Malizia, A.,McBride, V. A.,Scaringi, S.,Sguera, V.,Stephen, J. B.,Ubertini, P.,Dean, A. J.,Lebrun, F.,Terrier, R.,Renaud, M.,Mattana, F.,Gotz, D.,Rodriguez, J.,Belanger, G.,Walter, R.,Winkler, C. (2010-01-01) http://ui.adsabs.harvard.edu/#abs/2010ApJS..186....1B 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 hard X-ray view of bright infrared galaxies - Walter, R., Cabral, N. (2009-04-01) http://ui.adsabs.harvard.edu/#abs/2009A&A...497...97W 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 complete sample of type 1 AGN - Molina, M., Bassani, L.,Malizia, A.,Stephen, J. B.,Bird, A. J.,Dean, A. J.,Panessa, F.,de Rosa, A.,Landi, R. (2009-11-01) http://ui.adsabs.harvard.edu/#abs/2009MNRAS.399.1293M 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 long monitoring of persistent ultra compact X-ray bursters - Fiocchi, M., Bazzano, A.,Ubertini, P.,Bird, A. J.,Natalucci, L.,Sguera, V. (2008-12-01) http://ui.adsabs.harvard.edu/#abs/2008A&A...492..557F The Second IBIS/ISGRI Soft Gamma-Ray Survey Catalog - Bird, A. J., Barlow, E. J.,Bassani, L.,Bazzano, A.,Belanger, G.,Bodaghee, A.,Capitanio, F.,Dean, A. J.,Fiocchi, M.,Hill, A. B.,Lebrun, F.,Malizia, A.,Mas-Hesse, J. M.,Molina, M.,Moran, L.,Renaud, M.,Sguera, V.,Shaw, S. E.,Stephen, J. B.,Terrier, R.,Ubertini, P.,Walter, R.,Willis, D. R.,Winkler, C. (2006-01-01) http://ui.adsabs.harvard.edu/#abs/2006ApJ...636..765B The second INTEGRAL AGN catalogue - Beckmann, V., Soldi, S.,Ricci, C.,Alfonso-Garzon, J.,Courvoisier, T. J. -L.,Domingo, A.,Gehrels, N.,Lubinski, P.,Mas-Hesse, J. M.,Zdziarski, A. A. (2009-10-01) http://ui.adsabs.harvard.edu/#abs/2009A&A...505..417B 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 The Third IBIS/ISGRI Soft Gamma-Ray Survey Catalog - Bird, A. J., Malizia, A.,Bazzano, A.,Barlow, E. J.,Bassani, L.,Hill, A. B.,Belanger, G.,Capitanio, F.,Clark, D. J.,Dean, A. J.,Fiocchi, M.,Gotz, D.,Lebrun, F.,Molina, M.,Produit, N.,Renaud, M.,Sguera, V.,Stephen, J. B.,Terrier, R.,Ubertini, P.,Walter, R.,Winkler, C.,Zurita, J. (2007-05-01) http://ui.adsabs.harvard.edu/#abs/2007ApJS..170..175B 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 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	2004-06-14T18:56:01Z / 2004-06-17T09:18:16Z
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	2025-03-25T09:54:30Z
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, McHardy, 2025, 'Spectral variability of NGC 5548 - pivoting or two components?', 1.0, European Space Agency, https://doi.org/10.57780/esa-rrmhx3s