{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:EBRJS7VME5GDTS5BZQTPI66RJC","short_pith_number":"pith:EBRJS7VM","canonical_record":{"source":{"id":"2004.14232","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-29T14:33:48Z","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"title_canon_sha256":"e613a906ee31408bf17466c18b574a417ee11fc2cb2f9d9657f0724d24149372","abstract_canon_sha256":"5e68fc9f0ad3ed86b2c35aeb73bb56af616435663e4684c3ede2c21986841a98"},"schema_version":"1.0"},"canonical_sha256":"2062997eac274c39cba1cc26f47bd14885d1e4c3b7400120a637215018866c27","source":{"kind":"arxiv","id":"2004.14232","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.14232","created_at":"2026-07-05T01:16:49Z"},{"alias_kind":"arxiv_version","alias_value":"2004.14232v3","created_at":"2026-07-05T01:16:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.14232","created_at":"2026-07-05T01:16:49Z"},{"alias_kind":"pith_short_12","alias_value":"EBRJS7VME5GD","created_at":"2026-07-05T01:16:49Z"},{"alias_kind":"pith_short_16","alias_value":"EBRJS7VME5GDTS5B","created_at":"2026-07-05T01:16:49Z"},{"alias_kind":"pith_short_8","alias_value":"EBRJS7VM","created_at":"2026-07-05T01:16:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:EBRJS7VME5GDTS5BZQTPI66RJC","target":"record","payload":{"canonical_record":{"source":{"id":"2004.14232","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-29T14:33:48Z","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"title_canon_sha256":"e613a906ee31408bf17466c18b574a417ee11fc2cb2f9d9657f0724d24149372","abstract_canon_sha256":"5e68fc9f0ad3ed86b2c35aeb73bb56af616435663e4684c3ede2c21986841a98"},"schema_version":"1.0"},"canonical_sha256":"2062997eac274c39cba1cc26f47bd14885d1e4c3b7400120a637215018866c27","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:16:49.903010Z","signature_b64":"b4V239v7dzkoOXz+HqJbOoIdXzzsE1h9NWLqxUcX6Bpj4e7UelXYsEbwAkI2NsgQaAkmp4MEEUz4KQ3OgNJeBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2062997eac274c39cba1cc26f47bd14885d1e4c3b7400120a637215018866c27","last_reissued_at":"2026-07-05T01:16:49.902517Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:16:49.902517Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.14232","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:16:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T6eTET+gxzhooUMyyHRAFKO89nur7aJaS3ZvBBB/TLUKoeq8gpCggAGGJFzE8AsnEdc7Y4V47hYvQNI/qXfuDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T09:26:01.539762Z"},"content_sha256":"3ddd88f9a5942b2df02f5f2f6d9aa44f522e95ea91530e9907174968f1ad4b86","schema_version":"1.0","event_id":"sha256:3ddd88f9a5942b2df02f5f2f6d9aa44f522e95ea91530e9907174968f1ad4b86"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:EBRJS7VME5GDTS5BZQTPI66RJC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-Shooter survey of disk accretion in Upper Scorpius I. Very high accretion rates at age>5 Myr","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP","astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Frasca, A. Natta, A. Scholz, B. Nisini, C.F. Manara, C. Scardoni, D. Fedele, E. Rigliaco, E. Zari, G. Lodato, G. Mulders, G.P. Rosotti, I. Pascucci, J. Carpenter, J.M. Alcala, L. Hillenbrand, L. Testi","submitted_at":"2020-04-29T14:33:48Z","abstract_excerpt":"Determining the mechanisms that drive the evolution of protoplanetary disks is a necessary step to understand how planets form. Here we measured the mass accretion rate for young stellar objects at age >5 Myr, a critical test for the current models of disk evolution. We present the analysis of the spectra of 36 targets in the ~5-10 Myr old Upper Scorpius region for which disk masses were measured with ALMA. We find that the mass accretion rates in this sample of old but still survived disks are similarly high as those of the younger (<3 Myr old) star-forming regions of Lupus and Cha I, when co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.14232","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2004.14232/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:16:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W7WrQWfNOpXRMGeoafrGxFYvMvxGc3ArpNG6RIpYb/jjgNmgZkM3q1Jf6r7OdDii8yrAaIc01oFzl5pNhQzyCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T09:26:01.540143Z"},"content_sha256":"ebf83407e81479787dcf6cc863f865f702249fde447efb3f963aadced48e147f","schema_version":"1.0","event_id":"sha256:ebf83407e81479787dcf6cc863f865f702249fde447efb3f963aadced48e147f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EBRJS7VME5GDTS5BZQTPI66RJC/bundle.json","state_url":"https://pith.science/pith/EBRJS7VME5GDTS5BZQTPI66RJC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EBRJS7VME5GDTS5BZQTPI66RJC/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":"2026-07-10T09:26:01Z","links":{"resolver":"https://pith.science/pith/EBRJS7VME5GDTS5BZQTPI66RJC","bundle":"https://pith.science/pith/EBRJS7VME5GDTS5BZQTPI66RJC/bundle.json","state":"https://pith.science/pith/EBRJS7VME5GDTS5BZQTPI66RJC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EBRJS7VME5GDTS5BZQTPI66RJC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:EBRJS7VME5GDTS5BZQTPI66RJC","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":"5e68fc9f0ad3ed86b2c35aeb73bb56af616435663e4684c3ede2c21986841a98","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-29T14:33:48Z","title_canon_sha256":"e613a906ee31408bf17466c18b574a417ee11fc2cb2f9d9657f0724d24149372"},"schema_version":"1.0","source":{"id":"2004.14232","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.14232","created_at":"2026-07-05T01:16:49Z"},{"alias_kind":"arxiv_version","alias_value":"2004.14232v3","created_at":"2026-07-05T01:16:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.14232","created_at":"2026-07-05T01:16:49Z"},{"alias_kind":"pith_short_12","alias_value":"EBRJS7VME5GD","created_at":"2026-07-05T01:16:49Z"},{"alias_kind":"pith_short_16","alias_value":"EBRJS7VME5GDTS5B","created_at":"2026-07-05T01:16:49Z"},{"alias_kind":"pith_short_8","alias_value":"EBRJS7VM","created_at":"2026-07-05T01:16:49Z"}],"graph_snapshots":[{"event_id":"sha256:ebf83407e81479787dcf6cc863f865f702249fde447efb3f963aadced48e147f","target":"graph","created_at":"2026-07-05T01:16:49Z","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/2004.14232/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Determining the mechanisms that drive the evolution of protoplanetary disks is a necessary step to understand how planets form. Here we measured the mass accretion rate for young stellar objects at age >5 Myr, a critical test for the current models of disk evolution. We present the analysis of the spectra of 36 targets in the ~5-10 Myr old Upper Scorpius region for which disk masses were measured with ALMA. We find that the mass accretion rates in this sample of old but still survived disks are similarly high as those of the younger (<3 Myr old) star-forming regions of Lupus and Cha I, when co","authors_text":"A. Frasca, A. Natta, A. Scholz, B. Nisini, C.F. Manara, C. Scardoni, D. Fedele, E. Rigliaco, E. Zari, G. Lodato, G. Mulders, G.P. Rosotti, I. Pascucci, J. Carpenter, J.M. Alcala, L. Hillenbrand, L. Testi","cross_cats":["astro-ph.EP","astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-29T14:33:48Z","title":"X-Shooter survey of disk accretion in Upper Scorpius I. Very high accretion rates at age>5 Myr"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.14232","kind":"arxiv","version":3},"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":"sha256:3ddd88f9a5942b2df02f5f2f6d9aa44f522e95ea91530e9907174968f1ad4b86","target":"record","created_at":"2026-07-05T01:16:49Z","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":"5e68fc9f0ad3ed86b2c35aeb73bb56af616435663e4684c3ede2c21986841a98","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-29T14:33:48Z","title_canon_sha256":"e613a906ee31408bf17466c18b574a417ee11fc2cb2f9d9657f0724d24149372"},"schema_version":"1.0","source":{"id":"2004.14232","kind":"arxiv","version":3}},"canonical_sha256":"2062997eac274c39cba1cc26f47bd14885d1e4c3b7400120a637215018866c27","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2062997eac274c39cba1cc26f47bd14885d1e4c3b7400120a637215018866c27","first_computed_at":"2026-07-05T01:16:49.902517Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:16:49.902517Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b4V239v7dzkoOXz+HqJbOoIdXzzsE1h9NWLqxUcX6Bpj4e7UelXYsEbwAkI2NsgQaAkmp4MEEUz4KQ3OgNJeBg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:16:49.903010Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.14232","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3ddd88f9a5942b2df02f5f2f6d9aa44f522e95ea91530e9907174968f1ad4b86","sha256:ebf83407e81479787dcf6cc863f865f702249fde447efb3f963aadced48e147f"],"state_sha256":"03507426c708aa181074ffe5c2eeeb7539b2311287cc9243c7849a6b1c3458a5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LU4KCktevOf4mgppdZdJvuCWz1vvx/kGgp69xCkyz4laTETZGo942/GQwMhEh43wkg+t4hAqBOLOY+TBseMFCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-10T09:26:01.542118Z","bundle_sha256":"3348f011191cf5d78766e7d8505e478f9cd764492a44aae6062a373a2aa6e1c0"}}