{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:PQQV64G4GAOJBSFDZA7SAL6XAT","short_pith_number":"pith:PQQV64G4","canonical_record":{"source":{"id":"1903.05404","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-13T10:33:50Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"689f3fa9cc2cd4eb7dc997b2033ef933e8d8ce728fe4a79a53e79d9ec58a0844","abstract_canon_sha256":"1a833907aa9021c6f070fd630a3da75f9cb09df0ef1ba1acb323d15b03a573ba"},"schema_version":"1.0"},"canonical_sha256":"7c215f70dc301c90c8a3c83f202fd704d51f4ef74629c13b863539cf677ffd3b","source":{"kind":"arxiv","id":"1903.05404","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.05404","created_at":"2026-05-17T23:51:24Z"},{"alias_kind":"arxiv_version","alias_value":"1903.05404v1","created_at":"2026-05-17T23:51:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.05404","created_at":"2026-05-17T23:51:24Z"},{"alias_kind":"pith_short_12","alias_value":"PQQV64G4GAOJ","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"PQQV64G4GAOJBSFD","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"PQQV64G4","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:PQQV64G4GAOJBSFDZA7SAL6XAT","target":"record","payload":{"canonical_record":{"source":{"id":"1903.05404","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-13T10:33:50Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"689f3fa9cc2cd4eb7dc997b2033ef933e8d8ce728fe4a79a53e79d9ec58a0844","abstract_canon_sha256":"1a833907aa9021c6f070fd630a3da75f9cb09df0ef1ba1acb323d15b03a573ba"},"schema_version":"1.0"},"canonical_sha256":"7c215f70dc301c90c8a3c83f202fd704d51f4ef74629c13b863539cf677ffd3b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:24.380184Z","signature_b64":"03W0fW3yKFVcTikiI/YOkTBbNWPowmUO2lxmQQ6WN/ATAesGHRqiAWpEmzXtk5lNx02XlYt+ssGQz+4KKZhFBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7c215f70dc301c90c8a3c83f202fd704d51f4ef74629c13b863539cf677ffd3b","last_reissued_at":"2026-05-17T23:51:24.379611Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:24.379611Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.05404","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:51:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qM6meXDMrHfVwCNZCXl+pFVH6enkiOunU0zgFts2GU1gRLbtoQ0PiztpLcarMkrlDhMT5zT6cl8ntGQHmz48CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:26:01.963829Z"},"content_sha256":"af982478fbc262dbcaa14abec747b3b787dca1ef366a40e1ddab7e0a59d22dd9","schema_version":"1.0","event_id":"sha256:af982478fbc262dbcaa14abec747b3b787dca1ef366a40e1ddab7e0a59d22dd9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:PQQV64G4GAOJBSFDZA7SAL6XAT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The complex phenomena of YSOs revealed by their X-ray variability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Ettore Flaccomio, Fabio Reale, Ignazio Pillitteri, Salvatore Sciortino","submitted_at":"2019-03-13T10:33:50Z","abstract_excerpt":"X-ray observations of Young Stellar Objects (YSOs) have shown several complex phenomena at work.In recent years a few X-ray programs based on long, continuous and, sporadically, simultaneous coordinated multi-wavelengths observations have paved the way to our current understanding of the physical processes at work, that very likely regulates the interaction between the star and its circumstellar disk. We will present and discuss some recent results based on a novel analysis of few selected very large flares observed with the Chandra Orion Ultradeep Pointing (COUP), on the systematic analysis o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.05404","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:51:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"03ZKkfF62EXvHU+KShZgnS4WUbZE5QSXRKIV4brp93XMqkwV6K2LfZ6ExjevJJ3zR0iaxzq/zBmtcLrkCdI3BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:26:01.964308Z"},"content_sha256":"bd7a5238ab1bd1eb4dfcfaf9857ed5ef4f98084c805255165e0567a3656a8504","schema_version":"1.0","event_id":"sha256:bd7a5238ab1bd1eb4dfcfaf9857ed5ef4f98084c805255165e0567a3656a8504"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PQQV64G4GAOJBSFDZA7SAL6XAT/bundle.json","state_url":"https://pith.science/pith/PQQV64G4GAOJBSFDZA7SAL6XAT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PQQV64G4GAOJBSFDZA7SAL6XAT/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T13:26:01Z","links":{"resolver":"https://pith.science/pith/PQQV64G4GAOJBSFDZA7SAL6XAT","bundle":"https://pith.science/pith/PQQV64G4GAOJBSFDZA7SAL6XAT/bundle.json","state":"https://pith.science/pith/PQQV64G4GAOJBSFDZA7SAL6XAT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PQQV64G4GAOJBSFDZA7SAL6XAT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:PQQV64G4GAOJBSFDZA7SAL6XAT","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":"1a833907aa9021c6f070fd630a3da75f9cb09df0ef1ba1acb323d15b03a573ba","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-13T10:33:50Z","title_canon_sha256":"689f3fa9cc2cd4eb7dc997b2033ef933e8d8ce728fe4a79a53e79d9ec58a0844"},"schema_version":"1.0","source":{"id":"1903.05404","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.05404","created_at":"2026-05-17T23:51:24Z"},{"alias_kind":"arxiv_version","alias_value":"1903.05404v1","created_at":"2026-05-17T23:51:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.05404","created_at":"2026-05-17T23:51:24Z"},{"alias_kind":"pith_short_12","alias_value":"PQQV64G4GAOJ","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"PQQV64G4GAOJBSFD","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"PQQV64G4","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:bd7a5238ab1bd1eb4dfcfaf9857ed5ef4f98084c805255165e0567a3656a8504","target":"graph","created_at":"2026-05-17T23:51:24Z","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"},"paper":{"abstract_excerpt":"X-ray observations of Young Stellar Objects (YSOs) have shown several complex phenomena at work.In recent years a few X-ray programs based on long, continuous and, sporadically, simultaneous coordinated multi-wavelengths observations have paved the way to our current understanding of the physical processes at work, that very likely regulates the interaction between the star and its circumstellar disk. We will present and discuss some recent results based on a novel analysis of few selected very large flares observed with the Chandra Orion Ultradeep Pointing (COUP), on the systematic analysis o","authors_text":"Ettore Flaccomio, Fabio Reale, Ignazio Pillitteri, Salvatore Sciortino","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-13T10:33:50Z","title":"The complex phenomena of YSOs revealed by their X-ray variability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.05404","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:af982478fbc262dbcaa14abec747b3b787dca1ef366a40e1ddab7e0a59d22dd9","target":"record","created_at":"2026-05-17T23:51:24Z","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":"1a833907aa9021c6f070fd630a3da75f9cb09df0ef1ba1acb323d15b03a573ba","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-13T10:33:50Z","title_canon_sha256":"689f3fa9cc2cd4eb7dc997b2033ef933e8d8ce728fe4a79a53e79d9ec58a0844"},"schema_version":"1.0","source":{"id":"1903.05404","kind":"arxiv","version":1}},"canonical_sha256":"7c215f70dc301c90c8a3c83f202fd704d51f4ef74629c13b863539cf677ffd3b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7c215f70dc301c90c8a3c83f202fd704d51f4ef74629c13b863539cf677ffd3b","first_computed_at":"2026-05-17T23:51:24.379611Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:24.379611Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"03W0fW3yKFVcTikiI/YOkTBbNWPowmUO2lxmQQ6WN/ATAesGHRqiAWpEmzXtk5lNx02XlYt+ssGQz+4KKZhFBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:24.380184Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.05404","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:af982478fbc262dbcaa14abec747b3b787dca1ef366a40e1ddab7e0a59d22dd9","sha256:bd7a5238ab1bd1eb4dfcfaf9857ed5ef4f98084c805255165e0567a3656a8504"],"state_sha256":"3db28c496f00551cca94122740cfb075f881f893375d1201e4fd2e1ea296891f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"65LhvVXkd3THnWK3vuByTdH2OG0WUKxzGEu/kQfnbJf4eKVzDQBEXAQZv05h5CBF8yazECoYfhdxIUxPHyE9Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T13:26:01.967552Z","bundle_sha256":"e3685d863e1a2b163df7825f93beb639e0edbe10262681d94d41876e26003e06"}}