{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:C6AHGRXFCGEQXYYUMCAOW3TTLW","short_pith_number":"pith:C6AHGRXF","canonical_record":{"source":{"id":"1309.1018","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-04T13:09:17Z","cross_cats_sorted":[],"title_canon_sha256":"2a5e52954f285f2297fe9a556e57e0c3672cc61884e04f0fdd9422a182591ea6","abstract_canon_sha256":"701adfb13688862843cdc53f5d2461424cf482ad257cdd97d3361d3feb3fb30a"},"schema_version":"1.0"},"canonical_sha256":"17807346e511890be3146080eb6e735d8a2b63c1f57ae4d2fb9ed6de87628427","source":{"kind":"arxiv","id":"1309.1018","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.1018","created_at":"2026-05-18T01:47:49Z"},{"alias_kind":"arxiv_version","alias_value":"1309.1018v1","created_at":"2026-05-18T01:47:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.1018","created_at":"2026-05-18T01:47:49Z"},{"alias_kind":"pith_short_12","alias_value":"C6AHGRXFCGEQ","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"C6AHGRXFCGEQXYYU","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"C6AHGRXF","created_at":"2026-05-18T12:27:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:C6AHGRXFCGEQXYYUMCAOW3TTLW","target":"record","payload":{"canonical_record":{"source":{"id":"1309.1018","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-04T13:09:17Z","cross_cats_sorted":[],"title_canon_sha256":"2a5e52954f285f2297fe9a556e57e0c3672cc61884e04f0fdd9422a182591ea6","abstract_canon_sha256":"701adfb13688862843cdc53f5d2461424cf482ad257cdd97d3361d3feb3fb30a"},"schema_version":"1.0"},"canonical_sha256":"17807346e511890be3146080eb6e735d8a2b63c1f57ae4d2fb9ed6de87628427","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:49.873163Z","signature_b64":"2ND/BpoBxeSpnyzOfAp+OUvj6G0KuJq/nISU8zJld3q+YdX2Yi6Aiq7rhQkBiYEC79eMHiCVqfr0MvXMDUg8AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"17807346e511890be3146080eb6e735d8a2b63c1f57ae4d2fb9ed6de87628427","last_reissued_at":"2026-05-18T01:47:49.872716Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:49.872716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.1018","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":"2026-05-18T01:47:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hNx0N8OthMA7gHtoGg/5T6jzUqhL0CPfzLlNfqvh1obgOvxfB8TJ3KuxjNTC8sI03AZ0b8uv6kR6TJF8EoNZAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T06:38:22.006713Z"},"content_sha256":"b46d9362070dc0b66525160955a8988bf233136bd8d4c617f19559198ae83bed","schema_version":"1.0","event_id":"sha256:b46d9362070dc0b66525160955a8988bf233136bd8d4c617f19559198ae83bed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:C6AHGRXFCGEQXYYUMCAOW3TTLW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fragmentation, infall, and outflow around the showcase massive protostar NGC7538 IRS1 at 500 AU resolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"H. Beuther, H. Linz, Th. Henning","submitted_at":"2013-09-04T13:09:17Z","abstract_excerpt":"Aims: Revealing the fragmentation, infall, and outflow processes in the immediate environment around massive young stellar objects is crucial for understanding the formation of the most massive stars. Methods: With this goal in mind we present the so far highest spatial-resolution thermal submm line and continuum observations toward the young high-mass protostar NGC7538 IRS1. Using the Plateau de Bure Interferometer in its most extended configuration at 843mum wavelength, we achieved a spatial resolution of 0.2\"x0.17\", corresponding to ~500AU at a distance of 2.7\\,kpc. Results: For the first t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.1018","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":"2026-05-18T01:47:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+LC9maMAP002AH5aIDMSXLsjGD7Q4rK+8L15KDx5P8aHO286gMsElfG9RmVceePxYnh9oB/kdL4NaJKvUCCsBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T06:38:22.007053Z"},"content_sha256":"99bd98a33ee2b391f8c2dc6260f9138748621dfd40c79346ca22ebd27291022c","schema_version":"1.0","event_id":"sha256:99bd98a33ee2b391f8c2dc6260f9138748621dfd40c79346ca22ebd27291022c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C6AHGRXFCGEQXYYUMCAOW3TTLW/bundle.json","state_url":"https://pith.science/pith/C6AHGRXFCGEQXYYUMCAOW3TTLW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C6AHGRXFCGEQXYYUMCAOW3TTLW/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":"2026-06-03T06:38:22Z","links":{"resolver":"https://pith.science/pith/C6AHGRXFCGEQXYYUMCAOW3TTLW","bundle":"https://pith.science/pith/C6AHGRXFCGEQXYYUMCAOW3TTLW/bundle.json","state":"https://pith.science/pith/C6AHGRXFCGEQXYYUMCAOW3TTLW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C6AHGRXFCGEQXYYUMCAOW3TTLW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:C6AHGRXFCGEQXYYUMCAOW3TTLW","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":"701adfb13688862843cdc53f5d2461424cf482ad257cdd97d3361d3feb3fb30a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-04T13:09:17Z","title_canon_sha256":"2a5e52954f285f2297fe9a556e57e0c3672cc61884e04f0fdd9422a182591ea6"},"schema_version":"1.0","source":{"id":"1309.1018","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.1018","created_at":"2026-05-18T01:47:49Z"},{"alias_kind":"arxiv_version","alias_value":"1309.1018v1","created_at":"2026-05-18T01:47:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.1018","created_at":"2026-05-18T01:47:49Z"},{"alias_kind":"pith_short_12","alias_value":"C6AHGRXFCGEQ","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"C6AHGRXFCGEQXYYU","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"C6AHGRXF","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:99bd98a33ee2b391f8c2dc6260f9138748621dfd40c79346ca22ebd27291022c","target":"graph","created_at":"2026-05-18T01:47:49Z","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"},"paper":{"abstract_excerpt":"Aims: Revealing the fragmentation, infall, and outflow processes in the immediate environment around massive young stellar objects is crucial for understanding the formation of the most massive stars. Methods: With this goal in mind we present the so far highest spatial-resolution thermal submm line and continuum observations toward the young high-mass protostar NGC7538 IRS1. Using the Plateau de Bure Interferometer in its most extended configuration at 843mum wavelength, we achieved a spatial resolution of 0.2\"x0.17\", corresponding to ~500AU at a distance of 2.7\\,kpc. Results: For the first t","authors_text":"H. Beuther, H. Linz, Th. Henning","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-04T13:09:17Z","title":"Fragmentation, infall, and outflow around the showcase massive protostar NGC7538 IRS1 at 500 AU resolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.1018","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:b46d9362070dc0b66525160955a8988bf233136bd8d4c617f19559198ae83bed","target":"record","created_at":"2026-05-18T01:47:49Z","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":"701adfb13688862843cdc53f5d2461424cf482ad257cdd97d3361d3feb3fb30a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-04T13:09:17Z","title_canon_sha256":"2a5e52954f285f2297fe9a556e57e0c3672cc61884e04f0fdd9422a182591ea6"},"schema_version":"1.0","source":{"id":"1309.1018","kind":"arxiv","version":1}},"canonical_sha256":"17807346e511890be3146080eb6e735d8a2b63c1f57ae4d2fb9ed6de87628427","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"17807346e511890be3146080eb6e735d8a2b63c1f57ae4d2fb9ed6de87628427","first_computed_at":"2026-05-18T01:47:49.872716Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:49.872716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2ND/BpoBxeSpnyzOfAp+OUvj6G0KuJq/nISU8zJld3q+YdX2Yi6Aiq7rhQkBiYEC79eMHiCVqfr0MvXMDUg8AA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:49.873163Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.1018","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b46d9362070dc0b66525160955a8988bf233136bd8d4c617f19559198ae83bed","sha256:99bd98a33ee2b391f8c2dc6260f9138748621dfd40c79346ca22ebd27291022c"],"state_sha256":"de332910f2e8183df2300be324a6a5bafec0790d85f81974cc1e16dd816af1eb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MT0N9zeBnB69bXPY7Q0+AGhrWbB8SWE93bPkK1Bu+igDx7kiRrqeCVrZ574S/sXJud0ON4QCnVgq+5QSUV6nDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T06:38:22.008970Z","bundle_sha256":"642af728600d37a730cda6ac00178fc38ccb16c7c02d989293277820cd9c913f"}}