{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:WAYEQB4OO627WL7GVYC7RPJZGF","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"b0bbfb42808f290378c6337ae351bff33b642e6517eae5c90c9bde5545711b9f","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-10-22T16:32:25Z","title_canon_sha256":"f81fb60694b27009c8feb2015ebef44dcbf01ba37058754e267144cb0423094e"},"schema_version":"1.0","source":{"id":"1910.10092","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1910.10092","created_at":"2026-07-05T00:14:06Z"},{"alias_kind":"arxiv_version","alias_value":"1910.10092v1","created_at":"2026-07-05T00:14:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.10092","created_at":"2026-07-05T00:14:06Z"},{"alias_kind":"pith_short_12","alias_value":"WAYEQB4OO627","created_at":"2026-07-05T00:14:06Z"},{"alias_kind":"pith_short_16","alias_value":"WAYEQB4OO627WL7G","created_at":"2026-07-05T00:14:06Z"},{"alias_kind":"pith_short_8","alias_value":"WAYEQB4O","created_at":"2026-07-05T00:14:06Z"}],"graph_snapshots":[{"event_id":"sha256:3b2c0673f90a2ecab30cc0a4b6bcf29b2460f615fb7b1fd12b0d33e56f1c5735","target":"graph","created_at":"2026-07-05T00:14:06Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1910.10092/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Since the birth of X-ray Astronomy, spectacular advances have been seen in the imaging, spectroscopic and timing studies of the hot and violent X-ray Universe, and further leaps forward are expected in the future. On the other hand, polarimetry is very much lagging behind: after the measurements of the Crab Nebula and Scorpius X-1, obtained by OSO-8 in the 70s, no more observations have been performed in the classical X-ray band, even if some interesting results have been obtained in hard X-rays and in soft gamma-rays. The NASA/ASI mission IXPE, scheduled for the launch in 2021, is going to pr","authors_text":"Adam Ingram, Andrea Santangelo, Carole Mundell, Enrico Costa, Eugene Churazov, Fabio Muleri, Frederic Marin, Gianpiero Tagliaferri, Giorgio Matt, Henric Krawczynski, Herman Marshall, Hua Feng, Ildar Khabibullin, Jacco Vink, Jeremy Heyl, Julien Malzac, Juri Poutanen, Keith Jahoda, Mark Pearce, Michal Dovciak, Niccol\\`o Bucciantini, Paolo Soffitta, Philip Kaaret, Pierre-Olivier Petrucci, Roberto Taverna, Roberto Turolla, Roger Romani, Silvia Zane, Timothy Kallman, Vladimir Karas","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-10-22T16:32:25Z","title":"ESA Voyage 2050 white paper: A Polarized View of the Hot and Violent Universe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.10092","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:49de6132f38d4d0bad6d69d11b65b77ca1e7157f3c633b9bb9c6d8ad9436f48e","target":"record","created_at":"2026-07-05T00:14:06Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"b0bbfb42808f290378c6337ae351bff33b642e6517eae5c90c9bde5545711b9f","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-10-22T16:32:25Z","title_canon_sha256":"f81fb60694b27009c8feb2015ebef44dcbf01ba37058754e267144cb0423094e"},"schema_version":"1.0","source":{"id":"1910.10092","kind":"arxiv","version":1}},"canonical_sha256":"b03048078e77b5fb2fe6ae05f8bd393160bc135a0e6340d75ad89f53254b50fb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b03048078e77b5fb2fe6ae05f8bd393160bc135a0e6340d75ad89f53254b50fb","first_computed_at":"2026-07-05T00:14:06.012412Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:14:06.012412Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2XFguByTlGk4jXnt1ZoYzA+8gALyh6MBgbevzb8yEDUI6SNn9su+6lonw4ADF4GSFj30SWSpFyr7Q9NhKraiDg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:14:06.012819Z","signed_message":"canonical_sha256_bytes"},"source_id":"1910.10092","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:49de6132f38d4d0bad6d69d11b65b77ca1e7157f3c633b9bb9c6d8ad9436f48e","sha256:3b2c0673f90a2ecab30cc0a4b6bcf29b2460f615fb7b1fd12b0d33e56f1c5735"],"state_sha256":"a8302db35e445c96f69cc093fd76de3a87b09fc36327cd85a75fecf41b6cdd77"}