A dataset provided by the European Space Agency

Name: Nucleosynthesis in supernovae, positron containment, and particle acceleration, in Cas A and Tycho SNRs
Published: 2026-03-05T13:05:59Z

Proposal ID	1420015
Obs ID	14200150001, 14200150002
Title	Nucleosynthesis in supernovae, positron containment, and particle acceleration, in Cas A and Tycho SNRs
Download Data Associated to the proposal	https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:1420015
DOI	https://doi.org/10.57780/esa-don1aaq
Author	Diehl
Abstract	Cas A and Tycho are remnants of a core-collapse and type Ia supernova, respectively. Radioactive 44Ti has been observed from these two relatively young supernova remnants, and is believed to originate from the deep interiors of supernova explosions, representing physical conditions that are otherwise difficult to explore, if at all.Here we propose to simultaneously observe Cassiopeia A and Tycho in order to (1) bring Cas A results to sufficient quality for line shape and line ratio tests that can probe inner ejecta kinematics in unique ways, and (2) obtain sufficient exposure for Tycho to confirm the results reported from other instruments in the hard X-ray range. 44Ti nucleosynthesis is assumed to occur in alpha-rich freeze-out from Si burning or NSE burning, and was believed to be characteristic for core-collapse interiors. However in the Galaxy feewer 44Ti bright sources are seen than expected from core-collapse supernova statistics. Moreover, the detection of 44Ti from Tycho, a SN Ia remnant, adds to the puzzle of 44Ti synthesis and the origins of cosmic 44Ca. Additionally, the survey in 511 keV emission from positron annihilation with INTEGRAL has shown the disk being a rather faint source of positron annihilation emission, leading to the question if positrons from radioactive decays of + unstable isotopes may be contained in their sources and not leak out into interstellar medium of the Galaxys disk. Our planned observations will (4) constrain any local positron annihilation in the remnant itself, thus possibly explain the disk faintness in 511 keV gamma-rays.
Publications	An asymmetrical model for high-energy radiation of Cassiopeia A - Zhan, Shihong, Wang, Wei,Mou, Guobin,Li, Zhuo (2022-06-01) http://ui.adsabs.harvard.edu/#abs/2022MNRAS.513.2471Z Anomalous Cepheids Discovered in a Sample of Galactic Short Period Type II Cepheids - Jurkovic, M. I., (2018-12-01) http://ui.adsabs.harvard.edu/#abs/2018SerAJ.197...13J 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 Observations of GW170104 - Savchenko, V., Ferrigno, C.,Bozzo, E.,Bazzano, A.,Brandt, S.,Chenevez, J.,Courvoisier, T. J. -L.,Diehl, R.,Hanlon, L.,von Kienlin, A.,Kuulkers, E.,Laurent, P.,Lebrun, F.,Lutovinov, A.,Martin-Carillo, A.,Mereghetti, S.,Roques, J. P.,Sunyaev, R.,Ubertini, P. (2017-09-01) http://ui.adsabs.harvard.edu/#abs/2017ApJ...846L..23S INTEGRAL Observations of Magnetars - Pacholski, Dominik Patryk, Ducci, Lorenzo,Topinka, Martin,Mereghetti, Sandro (2025-01-01) http://ui.adsabs.harvard.edu/#abs/2025AN....34640109P Jitter Radiation as an Alternative Mechanism for the Nonthermal X-Ray Emission of Cassiopeia A - Greco, Emanuele, Vink, Jacco,Ellien, Amael,Ferrigno, Carlo (2023-10-01) http://ui.adsabs.harvard.edu/#abs/2023ApJ...956..116G 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 insights on the massive interacting binary UU Cassiopeiae - Mennickent, R. E., Djurasevic, G.,Vince, I.,Garces, J.,Hadrava, P.,Cabezas, M.,Petrovic, J.,Jurkovic, M. I.,Korcakova, D.,Markov, H. (2020-10-01) http://ui.adsabs.harvard.edu/#abs/2020A&A...642A.211M Search for Evolutionary Changes in the Periods of Cepheids: CF Cas - Berdnikov, L. N., Pastukhova, E. N. (2019-02-01) http://ui.adsabs.harvard.edu/#abs/2019AstL...45...92B Search for Evolutionary Changes in the Periods of the Cepheids CEa Cas and CEb Cas - Berdnikov, L. N., Belinskii, A. A.,Pastukhova, E. N.,Burlak, M. A.,Ikonnikova, N. P.,Mishin, E. O.,Shatskii, N. I. (2021-01-01) http://ui.adsabs.harvard.edu/#abs/2021AstL...47...28B Study of changes in the pulsation period of 148 Galactic Cepheid variables - Csornyei, G., Szabados, L.,Molnar, L.,Cseh, B.,Egei, N.,Kalup, Cs,Kecskemethy, V.,Konyves-Toth, R.,Sarneczky, K.,Szakats, R. (2022-04-01) http://ui.adsabs.harvard.edu/#abs/2022MNRAS.511.2125C 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 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 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 high mass X-ray binary population with Fermi-LAT - Harvey, Max, Rulten, Cameron B.,Chadwick, Paula M. (2022-05-01) http://ui.adsabs.harvard.edu/#abs/2022MNRAS.512.1141H
Temporal Coverage	2017-01-03T06:23:11Z / 2017-07-10T18:11:52Z
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	2026-03-05T13:05:59Z
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, Diehl, 2026, 'Nucleosynthesis in supernovae, positron containment, and particle acceleration, in Cas A and Tycho SNRs', 1.0, European Space Agency, https://doi.org/10.57780/esa-don1aaq