{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:6LSC7DWXVJ776VCKSSTCFERU3E","short_pith_number":"pith:6LSC7DWX","canonical_record":{"source":{"id":"1703.03464","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-09T21:04:26Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9e53d1f86795711def275dcca94af2bf9682a74d69b9da4d99cbf17e28d92d34","abstract_canon_sha256":"48986bee3c5c2dcf735c1e05f905a81d1a6c39108c7b666ebcc6e61a2074217a"},"schema_version":"1.0"},"canonical_sha256":"f2e42f8ed7aa7fff544a94a6229234d92acc2141f403ada48d6ccc426eef2420","source":{"kind":"arxiv","id":"1703.03464","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.03464","created_at":"2026-05-18T00:42:29Z"},{"alias_kind":"arxiv_version","alias_value":"1703.03464v2","created_at":"2026-05-18T00:42:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.03464","created_at":"2026-05-18T00:42:29Z"},{"alias_kind":"pith_short_12","alias_value":"6LSC7DWXVJ77","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6LSC7DWXVJ776VCK","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6LSC7DWX","created_at":"2026-05-18T12:31:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:6LSC7DWXVJ776VCKSSTCFERU3E","target":"record","payload":{"canonical_record":{"source":{"id":"1703.03464","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-09T21:04:26Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9e53d1f86795711def275dcca94af2bf9682a74d69b9da4d99cbf17e28d92d34","abstract_canon_sha256":"48986bee3c5c2dcf735c1e05f905a81d1a6c39108c7b666ebcc6e61a2074217a"},"schema_version":"1.0"},"canonical_sha256":"f2e42f8ed7aa7fff544a94a6229234d92acc2141f403ada48d6ccc426eef2420","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:29.342277Z","signature_b64":"05ezsl/UjUO0aPkMmd6NyitUuDB8F+ZTxsTjv7EHuXFYN7+CxtQq3kdAK8yot6JlkKUc+Ifr/xzNC5hStycKCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f2e42f8ed7aa7fff544a94a6229234d92acc2141f403ada48d6ccc426eef2420","last_reissued_at":"2026-05-18T00:42:29.341785Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:29.341785Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.03464","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":"2026-05-18T00:42:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ETadImLn/nItFqZGyfmhGA9vojs6hhYqllWW/AhASBrVDjljJSO/UBXFvqWF2oFoRFjR5xxXF9M/uzy1qMH5Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T19:46:49.052039Z"},"content_sha256":"446a4b06e02a7f9f16a311612c4ef5bdc0a6c8dfccd6d97e1ad5a68c42885b45","schema_version":"1.0","event_id":"sha256:446a4b06e02a7f9f16a311612c4ef5bdc0a6c8dfccd6d97e1ad5a68c42885b45"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:6LSC7DWXVJ776VCKSSTCFERU3E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gravitational collapse of the OMC-1 region","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"A. Hacar, J. Alves, J.R. Goicoechea, M. Tafalla","submitted_at":"2017-03-09T21:04:26Z","abstract_excerpt":"We have investigated the global dynamical state of the Integral Shaped Filament in the Orion A cloud using new N$_2$H$^+$ (1-0) large-scale, IRAM30m observations. Our analysis of its internal gas dynamics reveals the presence of accelerated motions towards the Orion Nebula Cluster, showing a characteristic blue-shifted profile centred at the position of the OMC-1 South region. The properties of these observed gas motions (profile, extension, and magnitude) are consistent with the expected accelerations for the gravitational collapse of the OMC-1 region and explain both the physical and kinemat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.03464","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":"2026-05-18T00:42:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CDgMzhqO2lNKBx7wEAdaq3ApEPyWaF0bGuZ2WtWLSjOqQgj0GEwkam9IRLXXaplP1TLrfInDsZ3AhyPj5cQnCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T19:46:49.052393Z"},"content_sha256":"5505e10b1a74463f973641efd9ff1f8ec3872e7e808da14e0d5a578b4f7bc083","schema_version":"1.0","event_id":"sha256:5505e10b1a74463f973641efd9ff1f8ec3872e7e808da14e0d5a578b4f7bc083"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6LSC7DWXVJ776VCKSSTCFERU3E/bundle.json","state_url":"https://pith.science/pith/6LSC7DWXVJ776VCKSSTCFERU3E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6LSC7DWXVJ776VCKSSTCFERU3E/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":"2026-05-20T19:46:49Z","links":{"resolver":"https://pith.science/pith/6LSC7DWXVJ776VCKSSTCFERU3E","bundle":"https://pith.science/pith/6LSC7DWXVJ776VCKSSTCFERU3E/bundle.json","state":"https://pith.science/pith/6LSC7DWXVJ776VCKSSTCFERU3E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6LSC7DWXVJ776VCKSSTCFERU3E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:6LSC7DWXVJ776VCKSSTCFERU3E","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":"48986bee3c5c2dcf735c1e05f905a81d1a6c39108c7b666ebcc6e61a2074217a","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-09T21:04:26Z","title_canon_sha256":"9e53d1f86795711def275dcca94af2bf9682a74d69b9da4d99cbf17e28d92d34"},"schema_version":"1.0","source":{"id":"1703.03464","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.03464","created_at":"2026-05-18T00:42:29Z"},{"alias_kind":"arxiv_version","alias_value":"1703.03464v2","created_at":"2026-05-18T00:42:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.03464","created_at":"2026-05-18T00:42:29Z"},{"alias_kind":"pith_short_12","alias_value":"6LSC7DWXVJ77","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6LSC7DWXVJ776VCK","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6LSC7DWX","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:5505e10b1a74463f973641efd9ff1f8ec3872e7e808da14e0d5a578b4f7bc083","target":"graph","created_at":"2026-05-18T00:42:29Z","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":"We have investigated the global dynamical state of the Integral Shaped Filament in the Orion A cloud using new N$_2$H$^+$ (1-0) large-scale, IRAM30m observations. Our analysis of its internal gas dynamics reveals the presence of accelerated motions towards the Orion Nebula Cluster, showing a characteristic blue-shifted profile centred at the position of the OMC-1 South region. The properties of these observed gas motions (profile, extension, and magnitude) are consistent with the expected accelerations for the gravitational collapse of the OMC-1 region and explain both the physical and kinemat","authors_text":"A. Hacar, J. Alves, J.R. Goicoechea, M. Tafalla","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-09T21:04:26Z","title":"Gravitational collapse of the OMC-1 region"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.03464","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":"sha256:446a4b06e02a7f9f16a311612c4ef5bdc0a6c8dfccd6d97e1ad5a68c42885b45","target":"record","created_at":"2026-05-18T00:42:29Z","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":"48986bee3c5c2dcf735c1e05f905a81d1a6c39108c7b666ebcc6e61a2074217a","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-09T21:04:26Z","title_canon_sha256":"9e53d1f86795711def275dcca94af2bf9682a74d69b9da4d99cbf17e28d92d34"},"schema_version":"1.0","source":{"id":"1703.03464","kind":"arxiv","version":2}},"canonical_sha256":"f2e42f8ed7aa7fff544a94a6229234d92acc2141f403ada48d6ccc426eef2420","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2e42f8ed7aa7fff544a94a6229234d92acc2141f403ada48d6ccc426eef2420","first_computed_at":"2026-05-18T00:42:29.341785Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:42:29.341785Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"05ezsl/UjUO0aPkMmd6NyitUuDB8F+ZTxsTjv7EHuXFYN7+CxtQq3kdAK8yot6JlkKUc+Ifr/xzNC5hStycKCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:42:29.342277Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.03464","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:446a4b06e02a7f9f16a311612c4ef5bdc0a6c8dfccd6d97e1ad5a68c42885b45","sha256:5505e10b1a74463f973641efd9ff1f8ec3872e7e808da14e0d5a578b4f7bc083"],"state_sha256":"24f1df584ea53ee00abbffb793db0a7653486816ca2bdbbfc3dbbc04264afec8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CLqOIMiA9Gs21Jpst0QQ0t5Kj7dA5SLOlmcTt54yl3H6/+Yh/99pJl78HiqyuXnpOYGbgstcazVdkssSqLgkAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T19:46:49.055170Z","bundle_sha256":"3ee5235d896e143215455a82f0555bc5d34ca9c2b020b8d50a26a705562899f1"}}