{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:RWGS3S6BBCB3RGVTNEFYVYDBJ5","short_pith_number":"pith:RWGS3S6B","canonical_record":{"source":{"id":"1805.02476","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-05-07T12:42:47Z","cross_cats_sorted":[],"title_canon_sha256":"1369593734764173fc8e056c435630d5b4c0d33a0c4c9eac9e3914ff16327405","abstract_canon_sha256":"41c049e443aefce0b346e11d782e511d697a03db0aae9b99cf8e3ddcb71759fe"},"schema_version":"1.0"},"canonical_sha256":"8d8d2dcbc10883b89ab3690b8ae0614f4aa57382abd848405e3b33ac986873cc","source":{"kind":"arxiv","id":"1805.02476","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.02476","created_at":"2026-05-18T00:09:53Z"},{"alias_kind":"arxiv_version","alias_value":"1805.02476v2","created_at":"2026-05-18T00:09:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.02476","created_at":"2026-05-18T00:09:53Z"},{"alias_kind":"pith_short_12","alias_value":"RWGS3S6BBCB3","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RWGS3S6BBCB3RGVT","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RWGS3S6B","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:RWGS3S6BBCB3RGVTNEFYVYDBJ5","target":"record","payload":{"canonical_record":{"source":{"id":"1805.02476","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-05-07T12:42:47Z","cross_cats_sorted":[],"title_canon_sha256":"1369593734764173fc8e056c435630d5b4c0d33a0c4c9eac9e3914ff16327405","abstract_canon_sha256":"41c049e443aefce0b346e11d782e511d697a03db0aae9b99cf8e3ddcb71759fe"},"schema_version":"1.0"},"canonical_sha256":"8d8d2dcbc10883b89ab3690b8ae0614f4aa57382abd848405e3b33ac986873cc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:53.608259Z","signature_b64":"4lYq9Bfh8o8rUX/E7CETaimN9NwqLS0QgWsQtTOv+Gr26lxC1dPBZesvvqau8NWVgPtzPkAICcCiecyT0Y21CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8d8d2dcbc10883b89ab3690b8ae0614f4aa57382abd848405e3b33ac986873cc","last_reissued_at":"2026-05-18T00:09:53.607559Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:53.607559Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.02476","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:09:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RIe7dod3nHOG/6qKcSCrRzJKGD7wnap0pG8D8zSV/nxDmfB/X2n0jS2nBInTfDFd5Ir/rBN2wits3EXoOd8gBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T05:54:09.528284Z"},"content_sha256":"4bf9014646292229787c6f822403b7280d465fee7954cd781aaf31bee1aee95d","schema_version":"1.0","event_id":"sha256:4bf9014646292229787c6f822403b7280d465fee7954cd781aaf31bee1aee95d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:RWGS3S6BBCB3RGVTNEFYVYDBJ5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unlocking the secrets of the midplane gas and dust distribution in the young hybrid disc HD 141569","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Grant Kennedy, James Miley, Mark Wyatt, Olja Panic","submitted_at":"2018-05-07T12:42:47Z","abstract_excerpt":"HD141569 is a pre-main sequence star with a disc uniquely placed between protoplanetary and debris discs, similar to the older `hybrid' type discs. This work aims to place the mass and spatial structure of the disc midplane in the context of the debris, hybrid and protoplanetary discs. We observed HD~141569 with ALMA in 1.3~mm continuum and $^{13}$CO (2-1). This is the first detection and image of the optically thin gas emission from the midplane of this disc. In continuum emission, we detect a combination of an unresolved central peak and a ring of millimetre emission at 220$\\pm$10~au, slight"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.02476","kind":"arxiv","version":2},"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":"2026-05-18T00:09:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"McAmr3WniGEoYFvFR4Ey/9WzWnRUeExYiotUXPvc33lZC6z1spG9U3oozOWAYn7g0USdHMlx/MWiP9ET9uR2Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T05:54:09.528643Z"},"content_sha256":"458063ba9055e967dfd7967e5e217eb6cec15a3e5e15130b2b6ec22148171595","schema_version":"1.0","event_id":"sha256:458063ba9055e967dfd7967e5e217eb6cec15a3e5e15130b2b6ec22148171595"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RWGS3S6BBCB3RGVTNEFYVYDBJ5/bundle.json","state_url":"https://pith.science/pith/RWGS3S6BBCB3RGVTNEFYVYDBJ5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RWGS3S6BBCB3RGVTNEFYVYDBJ5/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":"2026-05-20T05:54:09Z","links":{"resolver":"https://pith.science/pith/RWGS3S6BBCB3RGVTNEFYVYDBJ5","bundle":"https://pith.science/pith/RWGS3S6BBCB3RGVTNEFYVYDBJ5/bundle.json","state":"https://pith.science/pith/RWGS3S6BBCB3RGVTNEFYVYDBJ5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RWGS3S6BBCB3RGVTNEFYVYDBJ5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:RWGS3S6BBCB3RGVTNEFYVYDBJ5","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":"41c049e443aefce0b346e11d782e511d697a03db0aae9b99cf8e3ddcb71759fe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-05-07T12:42:47Z","title_canon_sha256":"1369593734764173fc8e056c435630d5b4c0d33a0c4c9eac9e3914ff16327405"},"schema_version":"1.0","source":{"id":"1805.02476","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.02476","created_at":"2026-05-18T00:09:53Z"},{"alias_kind":"arxiv_version","alias_value":"1805.02476v2","created_at":"2026-05-18T00:09:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.02476","created_at":"2026-05-18T00:09:53Z"},{"alias_kind":"pith_short_12","alias_value":"RWGS3S6BBCB3","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RWGS3S6BBCB3RGVT","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RWGS3S6B","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:458063ba9055e967dfd7967e5e217eb6cec15a3e5e15130b2b6ec22148171595","target":"graph","created_at":"2026-05-18T00:09:53Z","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":"HD141569 is a pre-main sequence star with a disc uniquely placed between protoplanetary and debris discs, similar to the older `hybrid' type discs. This work aims to place the mass and spatial structure of the disc midplane in the context of the debris, hybrid and protoplanetary discs. We observed HD~141569 with ALMA in 1.3~mm continuum and $^{13}$CO (2-1). This is the first detection and image of the optically thin gas emission from the midplane of this disc. In continuum emission, we detect a combination of an unresolved central peak and a ring of millimetre emission at 220$\\pm$10~au, slight","authors_text":"Grant Kennedy, James Miley, Mark Wyatt, Olja Panic","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-05-07T12:42:47Z","title":"Unlocking the secrets of the midplane gas and dust distribution in the young hybrid disc HD 141569"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.02476","kind":"arxiv","version":2},"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":"sha256:4bf9014646292229787c6f822403b7280d465fee7954cd781aaf31bee1aee95d","target":"record","created_at":"2026-05-18T00:09:53Z","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":"41c049e443aefce0b346e11d782e511d697a03db0aae9b99cf8e3ddcb71759fe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-05-07T12:42:47Z","title_canon_sha256":"1369593734764173fc8e056c435630d5b4c0d33a0c4c9eac9e3914ff16327405"},"schema_version":"1.0","source":{"id":"1805.02476","kind":"arxiv","version":2}},"canonical_sha256":"8d8d2dcbc10883b89ab3690b8ae0614f4aa57382abd848405e3b33ac986873cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8d8d2dcbc10883b89ab3690b8ae0614f4aa57382abd848405e3b33ac986873cc","first_computed_at":"2026-05-18T00:09:53.607559Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:53.607559Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4lYq9Bfh8o8rUX/E7CETaimN9NwqLS0QgWsQtTOv+Gr26lxC1dPBZesvvqau8NWVgPtzPkAICcCiecyT0Y21CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:53.608259Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.02476","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4bf9014646292229787c6f822403b7280d465fee7954cd781aaf31bee1aee95d","sha256:458063ba9055e967dfd7967e5e217eb6cec15a3e5e15130b2b6ec22148171595"],"state_sha256":"1b03aeb8be3f374cde71b4ce4cefb9e4299ca56c032b3f4160f448e2e20228a4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"60m6x6QRvjm7ja30zaqKuH2c0Fqq3NEoC6bOHsOgAjsn0otrUD8I6rSO0B2mY9m0cD6yQyxL9wUS4pBonKNBAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T05:54:09.530565Z","bundle_sha256":"2c5022177fb6a8c818ebc8c413fafd79600aa16e18297e4cddb37cf2c0b00101"}}