{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T12:36:25Z","timestamp":1777552585847,"version":"3.51.4"},"reference-count":84,"publisher":"Springer Science and Business Media LLC","issue":"3","license":[{"start":{"date-parts":[[2021,6,1]],"date-time":"2021-06-01T00:00:00Z","timestamp":1622505600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2021,6,22]],"date-time":"2021-06-22T00:00:00Z","timestamp":1624320000000},"content-version":"vor","delay-in-days":21,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Universit\u00e0 di Ferrara, Dipartimento di Fisica e Scienze della Terra, Ferrara, Italy"},{"DOI":"10.13039\/501100007109","name":"Universit\u00e0 degli Studi di Ferrara","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100007109","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Exp Astron"],"published-print":{"date-parts":[[2021,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Nuclear astrophysics, and particularly nuclear emission line diagnostics from a variety of cosmic sites, has remained one of the least developed fields in experimental astronomy, despite its central role in addressing a number of outstanding questions in modern astrophysics. Radioactive isotopes are co-produced with stable isotopes in the fusion reactions of nucleosynthesis in supernova explosions and other violent events, such as neutron star mergers. The origin of the 511 keV positron annihilation line observed in the direction of the Galactic Center is a 50-year-long mystery. In fact, we still do not understand whether its diffuse large-scale emission is entirely due to a population of discrete sources, which are unresolved with current poor angular resolution instruments at these energies, or whether dark matter annihilation could contribute to it. From the results obtained in the pioneering decades of this experimentally-challenging window, it has become clear that some of the most pressing issues in high-energy astrophysics and astro-particle physics would greatly benefit from significant progress in the observational capabilities in the keV-to-MeV energy band. Current instrumentation is in fact not sensitive enough to detect radioactive and annihilation lines from a wide variety of phenomena in our and nearby galaxies, let alone study the spatial distribution of their emission. In this White Paper (WP), we discuss how unprecedented studies in this field will become possible with a new low-energy gamma-ray space experiment, called <jats:italic>ASTENA<\/jats:italic> (Advanced Surveyor of Transient Events and Nuclear Astrophysics), which combines new imaging, spectroscopic and polarization capabilities. In a separate WP (Guidorzi et al. 39), we discuss how the same mission concept will enable new groundbreaking studies of the physics of Gamma\u2013Ray Bursts and other high-energy transient phenomena over the next decades.<\/jats:p>","DOI":"10.1007\/s10686-021-09727-7","type":"journal-article","created":{"date-parts":[[2021,6,22]],"date-time":"2021-06-22T22:02:15Z","timestamp":1624399335000},"page":"1175-1202","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Understanding the origin of the positron annihilation line and the physics of supernova explosions"],"prefix":"10.1007","volume":"51","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2284-571X","authenticated-orcid":false,"given":"F.","family":"Frontera","sequence":"first","affiliation":[]},{"given":"E.","family":"Virgilli","sequence":"additional","affiliation":[]},{"given":"C.","family":"Guidorzi","sequence":"additional","affiliation":[]},{"given":"P.","family":"Rosati","sequence":"additional","affiliation":[]},{"given":"R.","family":"Diehl","sequence":"additional","affiliation":[]},{"given":"T.","family":"Siegert","sequence":"additional","affiliation":[]},{"given":"C.","family":"Fryer","sequence":"additional","affiliation":[]},{"given":"L.","family":"Amati","sequence":"additional","affiliation":[]},{"given":"N.","family":"Auricchio","sequence":"additional","affiliation":[]},{"given":"R.","family":"Campana","sequence":"additional","affiliation":[]},{"given":"E.","family":"Caroli","sequence":"additional","affiliation":[]},{"given":"F.","family":"Fuschino","sequence":"additional","affiliation":[]},{"given":"C.","family":"Labanti","sequence":"additional","affiliation":[]},{"given":"M.","family":"Orlandini","sequence":"additional","affiliation":[]},{"given":"E.","family":"Pian","sequence":"additional","affiliation":[]},{"given":"J. B.","family":"Stephen","sequence":"additional","affiliation":[]},{"given":"S.","family":"Del Sordo","sequence":"additional","affiliation":[]},{"given":"C.","family":"Budtz-Jorgensen","sequence":"additional","affiliation":[]},{"given":"I.","family":"Kuvvetli","sequence":"additional","affiliation":[]},{"given":"S.","family":"Brandt","sequence":"additional","affiliation":[]},{"given":"R. M. Curado","family":"da Silva","sequence":"additional","affiliation":[]},{"given":"P.","family":"Laurent","sequence":"additional","affiliation":[]},{"given":"E.","family":"Bozzo","sequence":"additional","affiliation":[]},{"given":"P.","family":"Mazzali","sequence":"additional","affiliation":[]},{"given":"M. Della","family":"Valle","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2021,6,22]]},"reference":[{"issue":"6","key":"9727_CR1","doi-asserted-by":"publisher","first-page":"065803","DOI":"10.1103\/PhysRevC.74.065803","volume":"74","author":"I Ahmad","year":"2006","unstructured":"Ahmad, I., Greene, J. P., Moore, E. F., Ghelberg, S., Ofan, A., Paul, M., Kutschera, W.: Improved measurement of the Ti44 half-life from a 14-year long study. Phys. Rev. C 74(6), 065803 (2006). https:\/\/doi.org\/10.1103\/PhysRevC.74.065803","journal-title":"Phys. Rev. C"},{"issue":"2","key":"9727_CR2","first-page":"214","volume":"94","author":"F Albernhe","year":"1981","unstructured":"Albernhe, F., Le Borgne, J. F., Vedrenne, G., Boclet, D., Durouchoux, P., da Costa, J. M.: Detection of the positron annihilation gamma ray line from the Galactic Center region. A & A 94(2), 214\u2013218 (Feb 1981)","journal-title":"A & A"},{"key":"9727_CR3","doi-asserted-by":"publisher","first-page":"A108","DOI":"10.1051\/0004-6361\/201322393","volume":"564","author":"A Alexis","year":"2014","unstructured":"Alexis, A., Jean, P., Martin, P., Ferri\u00e8re, K.: Monte Carlo modelling of the propagation and annihilation of nucleosynthesis positrons in the Galaxy. A & A 564, A108 (2014)","journal-title":"A & A"},{"key":"9727_CR4","doi-asserted-by":"publisher","first-page":"233","DOI":"10.1007\/s10686-015-9442-5","volume":"39","author":"S Antier","year":"2015","unstructured":"Antier, S., Ferrando, P., Limousin, O., Caroli, E., Curado da Silva, R. M., et al.: Hard X-ray polarimetry with Caliste, a high performance CdTe based imaging spectrometer. Exp. Astron. 39, 233\u2013258 (2015). https:\/\/doi.org\/10.1007\/s10686-015-9442-5","journal-title":"Exp. Astron."},{"key":"9727_CR5","doi-asserted-by":"publisher","unstructured":"Auricchio, N., Caroli, E., Basili, A., et al.: Development status of a CZT spectrometer prototype with 3D spatial resolution for hard x-ray astronomy. In: High Energy, Optical, and Infrared Detectors for Astronomy V, volume 8453 of Proc. SPIE, p 84530S (2012). https:\/\/doi.org\/10.1117\/12.928327","DOI":"10.1117\/12.928327"},{"key":"9727_CR6","doi-asserted-by":"publisher","first-page":"1115","DOI":"10.1111\/j.1365-2966.2008.14113.x","volume":"392","author":"RM Bandyopadhyay","year":"2009","unstructured":"Bandyopadhyay, R. M., Silk, J., Taylor, J. E., Maccarone, T. J.: On the origin of the 511-keV emission in the Galactic Centre. MNRAS 392, 1115\u20131123 (2009)","journal-title":"MNRAS"},{"key":"9727_CR7","first-page":"3826","volume":"480","author":"R Bartels","year":"2018","unstructured":"Bartels, R., Calore, F., Storm, E., Weniger, C.: Galactic binaries can explain the Fermi Galactic centre excess and 511 keV emission. arXiv.org 480, 3826\u20133841 (2018)","journal-title":"arXiv.org"},{"issue":"2","key":"9727_CR8","doi-asserted-by":"publisher","first-page":"223","DOI":"10.1007\/s10511-017-9477-6","volume":"60","author":"GS Bisnovatyi-Kogan","year":"2017","unstructured":"Bisnovatyi-Kogan, G. S., Pozanenko, A. S.: Can flare stars explain the annihilation line from the galactic bulge? Astrophysics 60(2), 223\u2013227 (2017)","journal-title":"Astrophysics"},{"issue":"10","key":"9727_CR9","doi-asserted-by":"publisher","first-page":"105009","DOI":"10.1088\/1367-2630\/11\/10\/105009","volume":"11","author":"C B\u0153hm","year":"2009","unstructured":"B\u0153hm, C.: The dark matter interpretation of the 511keV line. N. J. Phys. 11(10), 105009 (2009). https:\/\/doi.org\/10.1088\/1367-2630\/11\/10\/105009","journal-title":"N. J. Phys."},{"key":"9727_CR10","doi-asserted-by":"publisher","first-page":"92","DOI":"10.1103\/PhysRevLett.92.101301","volume":"101301","author":"C Boehm","year":"2004","unstructured":"Boehm, C., Hooper, D., Silk, J., Casse, M., Paul, J.: Mev dark matter: Has it been detected?. Phys. Rev. Lett. 101301, 92 (2004). https:\/\/doi.org\/10.1103\/PhysRevLett.92.101301","journal-title":"Phys. Rev. Lett."},{"issue":"6235","key":"9727_CR11","doi-asserted-by":"publisher","first-page":"670","DOI":"10.1126\/science.aaa2259","volume":"348","author":"SE Boggs","year":"2015","unstructured":"Boggs, S. E., Harrison, F. A., Miyasaka, H., Grefenstette, B.W., et al.: 44Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion. Science 348(6235), 670\u2013671 (2015). https:\/\/doi.org\/10.1126\/science.aaa2259","journal-title":"Science"},{"key":"9727_CR12","doi-asserted-by":"publisher","first-page":"L45","DOI":"10.1086\/186237","volume":"383","author":"L Bouchet","year":"1991","unstructured":"Bouchet, L., Mandrou, P., Roques, J. P., Vedrenne, G., et al.: SIGMA discovery of variable, E +- E - annihilation radiation from the near galactic center variable compact source 1E 1740.7-2942. ApJl 383, L45 (1991). https:\/\/doi.org\/10.1086\/186237","journal-title":"ApJl"},{"key":"9727_CR13","unstructured":"Bouchet, L., Strong, A., Jourdain, E., Roques, J. P., Porter, T., Moskalenko, I., Diehl, R., Orlando, E.: A complete all-sky survey with INTEGRAL\/SPI: sources census, hard X-ray diffuse emission and annihilation line. In: The Extreme Sky: Sampling the Universe above 10 keV, page 16 (2009)"},{"key":"9727_CR14","first-page":"137","volume":"89","author":"R Campana","year":"2018","unstructured":"Campana, R., Fuschino, F., Labanti, C., Amati, L., Mereghetti, S., Fiorini, M., Frontera, F., Baldazzi, G., Bellutti, P., et al.: The X-Gamma imaging spectrometer (XGIS) onboard THESEUS. Mem. Soc. Astron. Italiana 89, 137 (2018)","journal-title":"Mem. Soc. Astron. Italiana"},{"issue":"4","key":"9727_CR15","doi-asserted-by":"publisher","first-page":"1848","DOI":"10.1109\/TNS.2009.2021475","volume":"56","author":"E Caroli","year":"2009","unstructured":"Caroli, E., Curado da Silva, R. M., Stephen, J. B., Pisa, A., Auricchio, N., Del Sordo, S., Donati, A., Schiavone, F., Landini, G., Honkimaki, V., Frontera, F.: A Polarimetric Experiment With a Laue Lens and CZT Pixel Detector. IEEE Trans. Nucl. Sci. 56(4), 1848\u20131854 (2009). https:\/\/doi.org\/10.1109\/TNS.2009.2021475","journal-title":"IEEE Trans. Nucl. Sci."},{"key":"9727_CR16","doi-asserted-by":"publisher","first-page":"69","DOI":"10.3390\/galaxies6030069","volume":"6","author":"E Caroli","year":"2018","unstructured":"Caroli, E., Moita, M., da Silva, R., Del Sordo, S., de Cesare, G., Maia, J., P\u00e0scoa, M.: Hard x-ray and soft gamma ray polarimetry with CdTe\/CZT spectro-imager. Galaxies 6, 69 (2018). https:\/\/doi.org\/10.3390\/galaxies6030069","journal-title":"Galaxies"},{"key":"9727_CR17","doi-asserted-by":"publisher","first-page":"429","DOI":"10.1007\/s11214-017-0426-9","volume":"212","author":"E Cavallari","year":"2017","unstructured":"Cavallari, E., Frontera, F.: Hard x-ray\/soft gamma-ray experiments and missions: overview and prospects. Space Sci. Rev. 212, 429\u2013518 (2017). https:\/\/doi.org\/10.1007\/s11214-017-0426-9","journal-title":"Space Sci. Rev."},{"key":"9727_CR18","doi-asserted-by":"crossref","unstructured":"Celotti, A., Blandford, R. D.: On the formation of jets. In: Kaper, L., Heuvel, E.P.J.V.D., Woudt, P. A. (eds.) Black Holes in Binaries and Galactic Nuclei, p 206 (2001)","DOI":"10.1007\/10720995_43"},{"issue":"2","key":"9727_CR19","doi-asserted-by":"publisher","first-page":"2229","DOI":"10.1093\/mnras\/sty1583","volume":"479","author":"MH Chan","year":"2018","unstructured":"Chan, M. H., Leung, C. H.: Constraining dark matter by the 511 keV line. MNRAS 479(2), 2229\u20132234 (2018). https:\/\/doi.org\/10.1093\/mnras\/sty1583","journal-title":"MNRAS"},{"issue":"4","key":"9727_CR20","doi-asserted-by":"publisher","first-page":"1377","DOI":"10.1111\/j.1365-2966.2005.08757.x","volume":"357","author":"E Churazov","year":"2005","unstructured":"Churazov, E., Sunyaev, R., Sazonov, S., Revnivtsev, M., Varshalovich, D.: Positron annihilation spectrum from the Galactic Centre region observed by SPI\/INTEGRAL. MNRAS 357(4), 1377\u20131386 (2005). https:\/\/doi.org\/10.1111\/j.1365-2966.2005.08757.x","journal-title":"MNRAS"},{"key":"9727_CR21","doi-asserted-by":"publisher","first-page":"406","DOI":"10.1038\/nature13672","volume":"512","author":"E Churazov","year":"2014","unstructured":"Churazov, E., Sunyaev, R., Isern, J., Kn\u00f6dlseder, J., Jean, P., Lebrun, F., Chugai, N., Grebenev, S., Bravo, E., Sazonov, S., Renaud, M.: Cobalt-56 \u03b3-ray emission lines from the type Ia supernova 2014J. Nature 512, 406\u2013408 (2014). https:\/\/doi.org\/10.1038\/nature13672","journal-title":"Nature"},{"key":"9727_CR22","doi-asserted-by":"publisher","first-page":"L101","DOI":"10.1086\/181406","volume":"187","author":"DD Clayton","year":"1974","unstructured":"Clayton, D. D., Hoyle, F.: Gamma-ray lines from novae. ApJl 187, L101 (1974). https:\/\/doi.org\/10.1086\/181406","journal-title":"ApJl"},{"key":"9727_CR23","doi-asserted-by":"publisher","first-page":"75","DOI":"10.1086\/149849","volume":"155","author":"DD Clayton","year":"1969","unstructured":"Clayton, D. D., Colgate, S. A., Fishman, G. J.: Gamma-ray lines from young supernova remnants. ApJ 155, 75 (1969). https:\/\/doi.org\/10.1086\/149849","journal-title":"ApJ"},{"issue":"8","key":"9727_CR24","doi-asserted-by":"publisher","first-page":"084903","DOI":"10.1063\/1.3000092","volume":"104","author":"RM Curado da Silva","year":"2008","unstructured":"Curado da Silva, R. M., Caroli, E., Stephen, J. B., et al.: Polarimetric performance of a Laue lens gamma-ray CdZnTe focal plane prototype. J. Appl. Phys. 104(8), 084903\u2013084903 (2008). https:\/\/doi.org\/10.1063\/1.3000092","journal-title":"J. Appl. Phys."},{"key":"9727_CR25","doi-asserted-by":"publisher","first-page":"761","DOI":"10.1086\/161411","volume":"273","author":"JK Daugherty","year":"1983","unstructured":"Daugherty, J. K., Harding, A. K.: Pair production in superstrong magnetic fields. Apj 273, 761\u2013773 (1983). https:\/\/doi.org\/10.1086\/161411","journal-title":"Apj"},{"key":"9727_CR26","first-page":"358","volume":"219","author":"AJ Dean","year":"1989","unstructured":"Dean, A. J., Fan, L., Byard, K., Goldwurm, A., Hall, C. J.: The gamma-ray emissivity of the earth\u2019s atmosphere. A & A 219, 358\u2013361 (1989)","journal-title":"A & A"},{"issue":"5","key":"9727_CR27","doi-asserted-by":"publisher","first-page":"464","DOI":"10.1002\/asna.201512179","volume":"336","author":"R Diehl","year":"2015","unstructured":"Diehl, R.: Gamma rays from a supernova of type Ia: SN2014J. Astronomische Nachrichten 336(5), 464 (Jun 2015). https:\/\/doi.org\/10.1002\/asna.201512179","journal-title":"Astronomische Nachrichten"},{"issue":"6201","key":"9727_CR28","doi-asserted-by":"publisher","first-page":"1162","DOI":"10.1126\/science.1254738","volume":"345","author":"R Diehl","year":"2014","unstructured":"Diehl, R., Siegert, T., Hillebrandt, W., et al.: Early 56Ni decay gamma rays from SN2014J suggest an unusual explosion. Science 345(6201), 1162\u20131165 (2014). https:\/\/doi.org\/10.1126\/science.1254738","journal-title":"Science"},{"key":"9727_CR29","doi-asserted-by":"publisher","first-page":"083519","DOI":"10.1103\/PhysRevD.76.083519","volume":"76","author":"DP Finkbeiner","year":"2007","unstructured":"Finkbeiner, D. P., Weiner, N.: Exciting dark matter and the integral\/spi 511 kev signal. Phys. Rev. D 76, 083519 (2007). https:\/\/doi.org\/10.1103\/PhysRevD.76.083519","journal-title":"Phys. Rev. D"},{"key":"9727_CR30","doi-asserted-by":"publisher","unstructured":"Frontera, F., von Ballmoos, P.: Laue Gamma-Ray lenses for space astrophysics: status and prospects. X-Ray Optics and Instrumentation, 2010, Special Issue on X-Ray Focusing: Techniques and Applications, id.215375, 2010:215375, 2010. https:\/\/doi.org\/10.1155\/2010\/215375","DOI":"10.1155\/2010\/215375"},{"key":"9727_CR31","doi-asserted-by":"publisher","first-page":"357","DOI":"10.1051\/aas:1997140","volume":"122","author":"F Frontera","year":"1997","unstructured":"Frontera, F., Costa, E., dal Fiume, D., Feroci, M., Nicastro, L., Orlandini, M., Palazzi, E., Zavattini, G.: The high energy instrument PDS on-board the BeppoSAX X\u2013ray astronomy satellite. Astron. Astrophys. Suppl. Series 122, 357\u2013369 (1997). https:\/\/doi.org\/10.1051\/aas:1997140","journal-title":"Astron. Astrophys. Suppl. Series"},{"key":"9727_CR32","doi-asserted-by":"crossref","unstructured":"Frontera, F., Loffredo, G., Pisa, A., Nobili, F., Carassiti, V., Evangelisti, F., Landi, L., Squerzanti, S., Caroli, E., Stephen, J. B., Andersen, K. H., Courtois, P., Auricchio, N., Milani, L., Negri, B.: Focusing of gamma-rays with Laue lenses: first results. In: Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, vol. 7011 (2008)","DOI":"10.1117\/12.790484"},{"key":"9727_CR33","doi-asserted-by":"publisher","first-page":"L13","DOI":"10.1086\/186077","volume":"375","author":"N Gehrels","year":"1991","unstructured":"Gehrels, N., Barthelmy, S. D., Teegarden, B. J., Tueller, J., Leventhal, M., MacCallum, C. J.: GRIS observations of positron annihilation radiation from the Galactic center. ApJl 375, L13\u2013L16 (1991). https:\/\/doi.org\/10.1086\/186077","journal-title":"ApJl"},{"key":"9727_CR34","doi-asserted-by":"publisher","first-page":"L79","DOI":"10.1086\/186353","volume":"389","author":"A Goldwurm","year":"1992","unstructured":"Goldwurm, A., Ballet, J., Cordier, B., Paul, J., Bouchet, L., Roques, J. P., Barret, D., Mandrou, P., Sunyaev, R., Churazov, E., Gilfanov, M., Dyachkov, A., Khavenson, N., Kovtunenko, V., Kremnev, R., Sukhanov, K.: Sigma\/GRANAT soft gamma-ray observations of the X-ray nova in Musca - Discovery of positron annihilation emission line. Astrophys. J. Lett. 389, L79\u2013L82 (1992)","journal-title":"Astrophys. J. Lett."},{"key":"9727_CR35","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1046\/j.1365-8711.1998.29511115.x","volume":"295","author":"J G\u00f3mez-Gomar","year":"1998","unstructured":"G\u00f3mez-Gomar, J., Isern, J., Jean, P.: Prospects for Type IA supernova explosion mechanism identification with gamma rays. MNRAS 295, 1\u20139 (1998). https:\/\/doi.org\/10.1046\/j.1365-8711.1998.29511115.x","journal-title":"MNRAS"},{"key":"9727_CR36","doi-asserted-by":"publisher","first-page":"373","DOI":"10.1038\/nature11473","volume":"490","author":"SA Grebenev","year":"2012","unstructured":"Grebenev, S. A., Lutovinov, A. A., Tsygankov, S. S., Winkler, C.: Hard-X-ray emission lines from the decay of 44Ti in the remnant of supernova 1987A. Nature 490, 373\u2013375 (2012). https:\/\/doi.org\/10.1038\/nature11473","journal-title":"Nature"},{"key":"9727_CR37","doi-asserted-by":"publisher","first-page":"339","DOI":"10.1038\/nature12997","volume":"506","author":"BW Grefenstette","year":"2014","unstructured":"Grefenstette, B. W., Harrison, F. A., Boggs, S. E., Reynolds, S. P., Fryer, C. L., et al.: Asymmetries in core-collapse supernovae from maps of radioactive 44Ti in CassiopeiaA. Nature 506, 339\u2013342 (2014). https:\/\/doi.org\/10.1038\/nature12997","journal-title":"Nature"},{"key":"9727_CR38","doi-asserted-by":"publisher","first-page":"19","DOI":"10.3847\/1538-4357\/834\/1\/19","volume":"834","author":"BW Grefenstette","year":"2017","unstructured":"Grefenstette, B. W., Fryer, C. L., Harrison, F. A., Boggs, S. E., et al.: The Distribution of Radioactive 44Ti in Cassiopeia A. ApJ 834, 19 (2017). https:\/\/doi.org\/10.3847\/1538-4357\/834\/1\/19","journal-title":"ApJ"},{"key":"9727_CR39","doi-asserted-by":"crossref","unstructured":"Guidorzi, C., Frontera, F., Ghirlanda, G., Stratta, G., Mundell, C. G., Virgilli, E., Rosati, P., Caroli, E., Amati, L., Pian, E., Kobayashi, S., Ghisellini, G., Fryer, C., Della Valle, M., Margutti, R., Marongiu, M., Martone, R., Campana, R., Fuschino, F., Labanti, C., Orlandini, M., Stephen, J. B., Brandt, S., Curado da Silva, R. M., Laurent, R., abd Mochkovitch, P., Bozzo, E., Ciolfi, R., Burderi, L., Di Salvo, T.: A Deep Study of the High\u2013Energy Transient Sky. Experimental Astronomy, this issue (2021)","DOI":"10.1007\/s10686-021-09725-9"},{"key":"9727_CR40","doi-asserted-by":"publisher","first-page":"70","DOI":"10.1038\/nature25029","volume":"556","author":"CJ Hailey","year":"2018","unstructured":"Hailey, C. J., Mori, K., Bauer, F. E., Berkowitz, M. E., Hong, J., Hord, B. J.: A density cusp of quiescent X-ray binaries in the central parsec of the Galaxy. Nature 556, 70\u201373 (2018). https:\/\/doi.org\/10.1038\/nature25029","journal-title":"Nature"},{"key":"9727_CR41","doi-asserted-by":"publisher","first-page":"103","DOI":"10.1088\/0004-637X\/770\/2\/103","volume":"770","author":"FA Harrison","year":"2013","unstructured":"Harrison, F. A., Craig, W. W., Christensen, F. E., Hailey, C. J., Zhang, W. W., et al.: The nuclear spectroscopic telescope array (NuSTAR) high-energy X-Ray mission. Astrophys. J. 770, 103 (2013)","journal-title":"Astrophys. J."},{"key":"9727_CR42","unstructured":"Hungerford, A., Fryer, C.: Astrophysical Radionuclides: Where are they and what can they tell us?. In: Bulletin of the American Physical Society, vol. 64 (2019)"},{"key":"9727_CR43","doi-asserted-by":"publisher","first-page":"A67","DOI":"10.1051\/0004-6361\/201526941","volume":"588","author":"J Isern","year":"2016","unstructured":"Isern, J., Jean, P., Bravo, E., Kn\u00f6dlseder, J., et al.: Gamma-ray emission from SN2014J near maximum optical light. A & A 588, A67 (2016). https:\/\/doi.org\/10.1051\/0004-6361\/201526941","journal-title":"A & A"},{"issue":"2","key":"9727_CR44","doi-asserted-by":"publisher","first-page":"579","DOI":"10.1051\/0004-6361:20053765","volume":"445","author":"P Jean","year":"2006","unstructured":"Jean, P., Kn\u00f6dlseder, J., Gillard, W., et al.: Spectral analysis of the Galactic e$^{+e^{-}}$ annihilation emission. Astron. Astrophys. 445(2), 579\u2013589 (2006)","journal-title":"Astron. Astrophys."},{"key":"9727_CR45","doi-asserted-by":"publisher","first-page":"L1","DOI":"10.1086\/180878","volume":"172","author":"WNIII Johnson","year":"1972","unstructured":"Johnson, W. N. III, Harnden, F. R. Jr., Haymes, R. C.: The spectrum of low-energy gamma radiation from the Galactic-center region. ApJl 172, L1 (1972). https:\/\/doi.org\/10.1086\/180878","journal-title":"ApJl"},{"key":"9727_CR46","doi-asserted-by":"publisher","first-page":"59","DOI":"10.1016\/j.nima.2015.03.004","volume":"786","author":"M Khalil","year":"2015","unstructured":"Khalil, M., Frontera, F., Caroli, E., Virgilli, E., Valsan, V.: A simulation study on the focal plane detector of the LAUE project. Nucl. Inst. Methods Phys. Res. A 786, 59\u201370 (2015). https:\/\/doi.org\/10.1016\/j.nima.2015.03.004","journal-title":"Nucl. Inst. Methods Phys. Res. A"},{"key":"9727_CR47","doi-asserted-by":"publisher","first-page":"513","DOI":"10.1051\/0004-6361:20042063","volume":"441","author":"J Kn\u00f6dlseder","year":"2005","unstructured":"Kn\u00f6dlseder, J., Jean, P., Lonjou, V., Weidenspointner, G., Guessoum, N., Gillard, W., Skinner, G., von Ballmoos, P., Vedrenne, G., Roques, J.-P., Schanne, S., Teegarden, B., Sch\u00f6nfelder, V., Winkler, C.: The all-sky distribution of 511 keV electron-positron annihilation emission. A&A 441, 513\u2013532 (2005). https:\/\/doi.org\/10.1051\/0004-6361:20042063","journal-title":"A&A"},{"key":"9727_CR48","doi-asserted-by":"crossref","unstructured":"Korobkin, O., Hungerford, A. M., Fryer, C. L., Mumpower, M. R., Misch, G. W., Sprouse, T. M., Lippuner, J., Surman, R., Couture, A. J., Bloser, P. F., Shirazi, F., Even, W. P., Vestrand, W. T., Miller, R. S.: Gamma-rays from kilonova:, a potential probe of r-process nucleosynthesis. arXiv:1905.05089 (2019)","DOI":"10.3847\/1538-4357\/ab64d8"},{"key":"9727_CR49","doi-asserted-by":"publisher","first-page":"89","DOI":"10.1086\/187347","volume":"426","author":"MJ Kuchner","year":"1994","unstructured":"Kuchner, M. J., Kirshner, R. P., Pinto, P. A., Leibundgut, B.: Evidence for Ni-56 yields Co-56 yields Fe-56 decay in type IA supernovae. ApJl 426, 89\u201392 (1994). https:\/\/doi.org\/10.1086\/187347","journal-title":"ApJl"},{"key":"9727_CR50","doi-asserted-by":"publisher","first-page":"486","DOI":"10.1016\/j.nima.2010.03.172","volume":"624","author":"I Kuvvetli","year":"2010","unstructured":"Kuvvetli, I., Budtz-J\u00f8rgensen, C., Caroli, E., Auricchio, N.: CZT drift strip detectors for high energy astrophysics. Nucl. Instrum. Methods Phys. Res. A 624, 486\u2013491 (2010). https:\/\/doi.org\/10.1016\/j.nima.2010.03.172","journal-title":"Nucl. Instrum. Methods Phys. Res. A"},{"key":"9727_CR51","doi-asserted-by":"publisher","unstructured":"Kuvvetli, I., Budtz-J\u00f8rgensen, C., Zappettini, A., et al.: A 3D CZT high resolution detector for x- and gamma-ray astronomy. In: High energy, optical, and infrared detectors for astronomy VI, volume 9154 of Proc. SPIE, pp. 91540X. https:\/\/doi.org\/10.1117\/12.2055119 (2014)","DOI":"10.1117\/12.2055119"},{"key":"9727_CR52","doi-asserted-by":"publisher","first-page":"L11","DOI":"10.1086\/182782","volume":"225","author":"M Leventhal","year":"1978","unstructured":"Leventhal, M., MacCallum, C. J., Stang, P. D.: Detection of 511 keV positron annihilation radiation from the galactic center direction. ApJl 225, L11\u2013L14 (1978). https:\/\/doi.org\/10.1086\/182782","journal-title":"ApJl"},{"key":"9727_CR53","doi-asserted-by":"publisher","first-page":"338","DOI":"10.1086\/158237","volume":"240","author":"M Leventhal","year":"1980","unstructured":"Leventhal, M., MacCallum, C. J., Huters, A. F., Stang, P. D.: Gamma-ray lines and continuum radiation from the galactic center direction. ApJ 240, 338\u2013343 (1980). https:\/\/doi.org\/10.1086\/158237","journal-title":"ApJ"},{"key":"9727_CR54","doi-asserted-by":"publisher","first-page":"459","DOI":"10.1086\/164004","volume":"302","author":"M Leventhal","year":"1986","unstructured":"Leventhal, M., MacCallum, C. J., Huters, A. F., Stang, P. D.: Current status of the galactic center positron-annihilation source. ApJ 302, 459\u2013461 (1986). https:\/\/doi.org\/10.1086\/164004","journal-title":"ApJ"},{"key":"9727_CR55","doi-asserted-by":"publisher","first-page":"686","DOI":"10.1086\/167740","volume":"343","author":"RE Lingenfelter","year":"1989","unstructured":"Lingenfelter, R. E., Ramaty, R.: The nature of the annihilation radiation and gamma-ray continuum from the galactic center region. ApJ 343, 686 (1989). https:\/\/doi.org\/10.1086\/167740","journal-title":"ApJ"},{"key":"9727_CR56","doi-asserted-by":"publisher","first-page":"1916","DOI":"10.1109\/TNS.2004.832679","volume":"51","author":"M Marisaldi","year":"2004","unstructured":"Marisaldi, M., Labanti, C., Soltau, H.: A pulse shape discrimination Gamma-Ray detector based on a silicon drift chamber coupled to a CsI(Tl) scintillator: prospects for a 1 keV 1 MeV Monolithic detector. IEEE Trans. Nucl. Sci. 51, 1916\u20131922 (2004). https:\/\/doi.org\/10.1109\/TNS.2004.832679","journal-title":"IEEE Trans. Nucl. Sci."},{"key":"9727_CR57","doi-asserted-by":"publisher","first-page":"1842","DOI":"10.1109\/TNS.2005.856615","volume":"52","author":"M Marisaldi","year":"2005","unstructured":"Marisaldi, M., Labanti, C., Soltau, H., Fiorini, C., Longoni, A., Perotti, F.: X- and Gamma-Ray detection with a silicon drift detector coupled to a CsI(Tl) scintillator operated with pulse shape discrimination technique. IEEE Trans. Nucl. Sci. 52, 1842\u20131848 (2005). https:\/\/doi.org\/10.1109\/TNS.2005.856615","journal-title":"IEEE Trans. Nucl. Sci."},{"key":"9727_CR58","unstructured":"McEnery, J., van der Horst, A., Dominguez, A., Moiseev, A., Marcowith, A. r., Harding, A., Lien, A., Giuliani, A., Inglis, A., Ansoldi, S., Stamerra, A., Manousakis, A., Strong, A., Bambi, C., Patricelli, B., Baring, M., Barrio, J. A., Bastieri, D., Fields, B., Beacom, J., Beckmann, V., Bednarek, W., Rani, B., Boggs, S., Bolotnikov, A., Cenko, S. B., Buckley, J., Grefenstette, B., Hui, M., Pittori, C., Prescod-Weinstein, C., Shrader, C., Gouiffes, C., Kierans, C., Wilson-Hodge, C., D\u2019Ammando, F., Castro, D., Kocveski, D., Gasparrini, D., Thompson, D., Williams, D., De Angelis, A., Bernard, D., Digel, S., Morcuende, D., Charles, E., Bissaldi, E., Hays, E., Ferrara, E., Bozzo, E., Grove, E., Wulf, E., Bottacini, E., Caroli, E., Kislat, F., Oikonomou, F., Giordano, F., Longo, F., Fryer, C., Fukazawa, Y., Georganopoulos, M., De Nolfo, G., Vianello, G., Kanbach, G., Younes, G., Blumer, H., Hartmann, D., Hernanz, M., Takahashi, H., Li, H., Agudo, I., Moskalenko, I., Stumke, I., Grenier, I., Smith, J., Rodi, J., Perkins, J., Gelfand, J., Holder, J., Knodlseder, J., Kopp, J., Lenain, J.-P., \u00c1lvarez, J.-M., Metcalfe, J., Krizmanic, J., Stephen, J. B., Hewitt, J., Mitchell, J., Harding, P., Tomsick, J., Racusin, J., Finke, J., Kargaltsev, O., Klimenko, A. V., Krawczynski, H., Smith, K., Kubo, H., Di Venere, L., Marcotulli, L., Lommler, J., Parker, L., Baldini, L., Foffano, L., Zampieri, L., Tibaldo, L., Petropoulou, M., Ajello, M., Meyer, M., L\u00f3pez, M., McConnell, M., Boettcher, M., Cardillo, M., Martinez, M., Kerr, M., Mazziotta, M. N., McEnery, J., Di Mauro, M., Wood, M., Meyer, E., Briggs, M., De Becker, M., Lovellette, M., Doro, M., Sanchez-Conde, M. A., Moss, M., Mizuno, T., Rib\u00f3, M., Nakazawa, K., Neilson, N. K., Auricchio, N., Omodei, N., Oberlack, U., Ohno, M., Orland o, E., Otte, N., Coppi, P., Bloser, P., Zhang, H., Laurent, P., Pohl, M., Prand ini, E., Shawhan, P., Caputo, R., Campana, R., Rando, R., Woolf, R., Johnson, R., Mignani, R., Walter, R., Ojha, R., da Silva, R. C., Dietrich, S., Funk, S., Zane, S., Anton, S., Buson, S., Cutini, S., Saz Parkinson, P., Schirato, R., Griffin, S., Kaufmann, S., Stawarz, L., Ciprini, S., Del Sordo, S., Jones, S., Guiriec, S., Tajima, H., Cheung, T., The, L.-S., Venters, T., Porter, T., Linden, T., Barres, U., Paliya, V. S., Bozhilov, V., Vestrand, T., Tatischeff, V., Chen, W., Wang, X., Tanaka, Y., Uhm, L., Zhang, B., Zimmer, S., Zoglauer, A., Wadiasingh, Z.: All-sky medium energy gamma-ray observatory: exploring the extreme Multimessenger Universe. In: BAAS, vol. 51, p. 245 (2019)"},{"issue":"2","key":"9727_CR59","doi-asserted-by":"publisher","first-page":"503","DOI":"10.1086\/313262","volume":"124","author":"PA Milne","year":"1999","unstructured":"Milne, P. A., The, L. S., Leising, M. D.: Positron Escape from Type IA Supernovae. ApJs 124(2), 503\u2013526 (1999). https:\/\/doi.org\/10.1086\/313262","journal-title":"ApJs"},{"issue":"2","key":"9727_CR60","doi-asserted-by":"publisher","first-page":"26","DOI":"10.1088\/0067-0049\/219\/2\/26","volume":"219","author":"P Mr\u00f3z","year":"2015","unstructured":"Mr\u00f3z, P., Udalski, A., Poleski, R., Soszy\u0144ski, I., Szyma\u0144ski, M. K., Pietrzy\u0144ski, G., Wyrzykowski, \u0141., Ulaczyk, K., Koz\u0142owski, S., P. Pietrukowicz, Skowron, J.: OGLE atlas of classical Novae. I. Galactic bulge objects. ApJs 219(2), 26 (2015). https:\/\/doi.org\/10.1088\/0067-0049\/219\/2\/26","journal-title":"ApJs"},{"key":"9727_CR61","doi-asserted-by":"publisher","first-page":"L105","DOI":"10.1086\/186970","volume":"413","author":"MM Phillips","year":"1993","unstructured":"Phillips, M. M.: The absolute magnitudes of Type IA supernovae. ApJl 413, L105\u2013L108 (1993). https:\/\/doi.org\/10.1086\/186970","journal-title":"ApJl"},{"key":"9727_CR62","doi-asserted-by":"publisher","first-page":"1001","DOI":"10.1103\/RevModPhys.83.1001","volume":"83","author":"N Prantzos","year":"2011","unstructured":"Prantzos, N., Boehm, C., Bykov, A. M., Diehl, R., Ferri\u00e8re, K., Guessoum, N., Jean, P., Knoedlseder, J., Marcowith, A., Moskalenko, I. V., Strong, A., Weidenspointner, G.: The 511 keV emission from positron annihilation in the Galaxy. Rev. Mod. Phys. 83, 1001\u20131056 (2011). https:\/\/doi.org\/10.1103\/RevModPhys.83.1001","journal-title":"Rev. Mod. Phys."},{"key":"9727_CR63","doi-asserted-by":"publisher","first-page":"L85","DOI":"10.1086\/186965","volume":"413","author":"WR Purcell","year":"1993","unstructured":"Purcell, W. R., Grabelsky, D. A., Ulmer, M. P., Johnson, W. N., Kinzer, R. L., Kurfess, J. D., Strickman, M. S., Jung, G. V.: OSSE observations of Galactic 511 keV positron annihilation radiation - Initial phase 1 results. ApJl 413, L85\u2013L88 (1993). https:\/\/doi.org\/10.1086\/186965","journal-title":"ApJl"},{"key":"9727_CR64","doi-asserted-by":"publisher","first-page":"725","DOI":"10.1086\/304994","volume":"491","author":"WR Purcell","year":"1997","unstructured":"Purcell, W. R., Cheng, L. -X., Dixon, D. D., Kinzer, R. L., Kurfess, J. D., Leventhal, M., Saunders, M. A., Skibo, J. G., Smith, D. M., Tueller, J.: OSSE mapping of galactic 511 keV positron annihilation line emission. ApJ 491, 725\u2013748 (1997)","journal-title":"ApJ"},{"key":"9727_CR65","doi-asserted-by":"publisher","first-page":"L41","DOI":"10.1086\/507300","volume":"647","author":"M Renaud","year":"2006","unstructured":"Renaud, M., Vink, J., Decourchelle, A., Lebrun, F., et al.: The Signature of 44Ti in Cassiopeia A revealed by IBIS\/ISGRI on INTEGRAL. ApJl 647, L41\u2013L44 (2006). https:\/\/doi.org\/10.1086\/507300","journal-title":"ApJl"},{"key":"9727_CR66","doi-asserted-by":"publisher","first-page":"L45","DOI":"10.1086\/185776","volume":"358","author":"GH Share","year":"1990","unstructured":"Share, G. H., Leising, M. D., Messina, D. C., Purcell, W. R.: Limits on a variable source of 511 keV annihilation radiation near the Galactic center. ApJl 358, L45\u2013L48 (1990). https:\/\/doi.org\/10.1086\/185776","journal-title":"ApJl"},{"key":"9727_CR67","doi-asserted-by":"publisher","first-page":"A124","DOI":"10.1051\/0004-6361\/201525877","volume":"579","author":"T Siegert","year":"2015","unstructured":"Siegert, T., Diehl, R., Krause, M. G. H., Greiner, J.: Revisiting INTEGRAL\/SPI observations of 44Ti from Cassiopeia A. A & A 579, A124 (2015). https:\/\/doi.org\/10.1051\/0004-6361\/201525877","journal-title":"A & A"},{"key":"9727_CR68","doi-asserted-by":"publisher","first-page":"341","DOI":"10.1038\/nature16978","volume":"531","author":"T Siegert","year":"2016","unstructured":"Siegert, T., Diehl, R., Greiner, J., Krause, M. G. H., Beloborodov, A. M., Bel, M. C., Guglielmetti, F., Rodriguez, J., Strong, A. W., Zhang, X.: Positron annihilation signatures associated with the outburst of the microquasar V404 Cygni. Nature 531, 341\u2013343 (2016a). https:\/\/doi.org\/10.1038\/nature16978","journal-title":"Nature"},{"key":"9727_CR69","doi-asserted-by":"publisher","first-page":"A84","DOI":"10.1051\/0004-6361\/201527510","volume":"586","author":"T Siegert","year":"2016","unstructured":"Siegert, T., Diehl, R., Khachatryan, G., Krause, M. G. H., Guglielmetti, F., Greiner, J., Strong, A. W., Zhang, X.: Gamma-ray spectroscopy of positron annihilation in the Milky Way. Astron. Astrophys. 586, A84 (2016b)","journal-title":"Astron. Astrophys."},{"key":"9727_CR70","doi-asserted-by":"publisher","first-page":"A25","DOI":"10.1051\/0004-6361\/201629136","volume":"595","author":"T Siegert","year":"2016","unstructured":"Siegert, T., Diehl, R., Vincent, A. C., Guglielmetti, F., Krause, M. G. H., Boehm, C.: Search for 511 keV emission in satellite galaxies of the Milky Way with INTEGRAL\/SPI. A & A 595, A25 (2016c)","journal-title":"A & A"},{"key":"9727_CR71","doi-asserted-by":"publisher","first-page":"A126","DOI":"10.1051\/0004-6361\/201833856","volume":"627","author":"T Siegert","year":"2019","unstructured":"Siegert, T., Crocker, R. M., Diehl, R., Krause, M. G. H., Panther, F. H., Pleintinger, M. M. M., Weinberger, C.: Constraints on positron annihilation kinematics in the inner Galaxy. Astron. Astrophys. 627, A126 (2019)","journal-title":"Astron. Astrophys."},{"key":"9727_CR72","doi-asserted-by":"publisher","first-page":"1681","DOI":"10.1111\/j.1365-2966.2008.12600.x","volume":"385","author":"SA Sim","year":"2008","unstructured":"Sim, S. A., Mazzali, P. A.: On the \u03b3-ray emission of Type Ia supernovae. MNRAS 385, 1681\u20131690 (2008). https:\/\/doi.org\/10.1111\/j.1365-2966.2008.12600.x","journal-title":"MNRAS"},{"key":"9727_CR73","doi-asserted-by":"crossref","unstructured":"Skinner, G., Diehl, R., Zhang, X., Bouchet, L., Jean, P.: The Galactic distribution of the 511 keV e+\/e\u2212 annihilation radiation. In: Proceedings of the 10th INTEGRAL Workshop: \u201cA Synergistic View of the High-Energy Sky\u201d (INTEGRAL 2014). 15-19 September 2014. Annapolis, MD, USA. Published online at, p 054 (2014) http:\/\/pos.sissa.it\/cgi-bin\/reader\/conf.cgi?confid=228","DOI":"10.22323\/1.228.0054"},{"key":"9727_CR74","doi-asserted-by":"publisher","first-page":"L75","DOI":"10.1086\/310061","volume":"463","author":"BJ Teegarden","year":"1996","unstructured":"Teegarden, B. J., Cline, T. L., Gehrels, N., Palmer, D., Ramaty, R., Seifert, H., Hurley, K. H., Landis, D. A., Madden, N. W., Malone, D., Pehl, R., Owens, A.: TGRS observation of the galactic center annihilation line. Apj Lett 463, L75 (1996). https:\/\/doi.org\/10.1086\/310061","journal-title":"Apj Lett"},{"key":"9727_CR75","unstructured":"Timmes, F., Fryer, C., Timmes, F., Hungerford, A. L., Couture, A., Adams, F., Aoki, W., Arcones, A., Arnett, D., Auchettl, K., et al.: Catching element formation in the act ; the case for a new MeV Gamma-ray mission: radionuclide astronomy in the 2020s. In: BAAS, vol. 51, p. 2 (2019)"},{"key":"9727_CR76","doi-asserted-by":"publisher","first-page":"L63","DOI":"10.1051\/0004-6361:20031482","volume":"411","author":"G Vedrenne","year":"2003","unstructured":"Vedrenne, G., Roques, J. -P., Sch\u00f6nfelder, V., Mandrou, P., Lichti, G. G., et al.: SPI: The spectrometer aboard INTEGRAL. Astron. Astrophys. 411, L63\u2013L70 (2003)","journal-title":"Astron. Astrophys."},{"key":"9727_CR77","doi-asserted-by":"publisher","first-page":"L79","DOI":"10.1086\/324172","volume":"560","author":"J Vink","year":"2001","unstructured":"Vink, J., Laming, J. M., Kaastra, J. S., Bleeker, J. A. M., et al.: Detection of the 67.9 and 78.4 keV lines associated with the radioactive decay of 44Ti in Cassiopeia A. ApJl 560, L79\u2013L82 (2001). https:\/\/doi.org\/10.1086\/324172","journal-title":"ApJl"},{"key":"9727_CR78","doi-asserted-by":"publisher","unstructured":"Virgilli, E., Frontera, F., Valsan, V., Liccardo, V., Carassiti, V., Evangelisti, F., Squerzanti, S.: Laue lenses for hard x-\/soft \u03b3-rays: new prototype results. In: Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, volume 8147 of Proc. SPIE, p 81471B (2011). https:\/\/doi.org\/10.1117\/12.895233","DOI":"10.1117\/12.895233"},{"key":"9727_CR79","doi-asserted-by":"publisher","unstructured":"Virgilli, E., Frontera, F., Rosati, P., Liccardo, V., Squerzanti, S., Carassiti, V., Caroli, E., Auricchio, N., Stephen, J. B.: Hard x-ray broad band Laue lenses (80-600 keV): building methods and performances Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, volume 9603 of Proc. SPIE, page 960308. https:\/\/doi.org\/10.1117\/12.2190335 (2015)","DOI":"10.1117\/12.2190335"},{"issue":"4","key":"9727_CR80","doi-asserted-by":"publisher","first-page":"044001","DOI":"10.1117\/1.JATIS.3.4.044001","volume":"3","author":"E Virgilli","year":"2017","unstructured":"Virgilli, E., Valsan, V., Frontera, F., Caroli, E., Liccardo, V., B. Stephen, J.: Expected performances of a Laue lens made with bent crystals. J. Astron. Telesc. Instrum. Syst. 3(4), 044001 (2017). https:\/\/doi.org\/10.1117\/1.JATIS.3.4.044001","journal-title":"J. Astron. Telesc. Instrum. Syst."},{"key":"9727_CR81","doi-asserted-by":"publisher","first-page":"159","DOI":"10.1038\/nature06490","volume":"451","author":"G Weidenspointner","year":"2008","unstructured":"Weidenspointner, G., Skinner, G., Jean, P., Kn\u00f6dlseder, J., von Ballmoos, P., Bignami, G., Diehl, R., Strong, A. W., Cordier, B., Schanne, S., Winkler, C.: An asymmetric distribution of positrons in the Galactic disk revealed by \u03b3,-rays. Nature 451, 159\u2013162 (2008). https:\/\/doi.org\/10.1038\/nature06490","journal-title":"Nature"},{"key":"9727_CR82","doi-asserted-by":"publisher","unstructured":"Weisskopf, M. C., Elsner, R. F., Hanna, D., Kaspi, V. M., O\u2019Dell, S.L., Pavlov, G. G., Ramsey, B. D.: The prospects for X-ray polarimetry and its potential use for understanding neutron stars. In: Becker, W. (ed.) Neutron Stars and Pulsars, .Astrophysics and Space Science Library, vol. 357, pp 589\u2013619. Springer (2009). https:\/\/doi.org\/10.1007\/978-3-540-76965-1_22","DOI":"10.1007\/978-3-540-76965-1_22"},{"issue":"10","key":"9727_CR83","doi-asserted-by":"publisher","first-page":"103525","DOI":"10.1103\/PhysRevD.94.103525","volume":"94","author":"RJ Wilkinson","year":"2016","unstructured":"Wilkinson, R. J., Vincent, A. C., B\u00c5\u2018hm, C., McCabe, C: Ruling out the light weakly interacting massive particle explanation of the Galactic 511 keV line. Phys. Rev. D 94(10), 103525 (2016). https:\/\/doi.org\/10.1103\/PhysRevD.94.103525","journal-title":"Phys. Rev. D"},{"issue":"1","key":"9727_CR84","doi-asserted-by":"publisher","first-page":"23","DOI":"10.3847\/1538-4357\/ab2593","volume":"880","author":"M-R Wu","year":"2019","unstructured":"Wu, M. -R., Banerjee, P., Metzger, B. D., Mart\u00ednez-Pinedo, G., Aramaki, T., Burns, E., Hailey, C. J., Barnes, J., Karagiorgi, G.: Finding the remnants of the Milky Way\u2019s last neutron star mergers. ApJ 880 (1), 23 (2019). https:\/\/doi.org\/10.3847\/1538-4357\/ab2593","journal-title":"ApJ"}],"container-title":["Experimental Astronomy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s10686-021-09727-7.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s10686-021-09727-7\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s10686-021-09727-7.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,10,26]],"date-time":"2021-10-26T02:41:32Z","timestamp":1635216092000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s10686-021-09727-7"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,6]]},"references-count":84,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2021,6]]}},"alternative-id":["9727"],"URL":"https:\/\/doi.org\/10.1007\/s10686-021-09727-7","relation":{},"ISSN":["0922-6435","1572-9508"],"issn-type":[{"value":"0922-6435","type":"print"},{"value":"1572-9508","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,6]]},"assertion":[{"value":"18 July 2020","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"2 March 2021","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"22 June 2021","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}}]}}