{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:FEOPYCCHJ3Q5KTUSQCVPYQ5SD7","short_pith_number":"pith:FEOPYCCH","canonical_record":{"source":{"id":"0707.2769","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-07-18T17:24:12Z","cross_cats_sorted":[],"title_canon_sha256":"4272957e07888cde914199ab08d32c0cb45253b63c3929fc9941dd86fa36b321","abstract_canon_sha256":"4bcdf27a9ae9af9e3bbb8a96a38ee95214ca2d56402d9c09e54699269caa4f9e"},"schema_version":"1.0"},"canonical_sha256":"291cfc08474ee1d54e9280aafc43b21fc06eecc3d68088cd17d895620c08d050","source":{"kind":"arxiv","id":"0707.2769","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0707.2769","created_at":"2026-07-04T17:04:44Z"},{"alias_kind":"arxiv_version","alias_value":"0707.2769v1","created_at":"2026-07-04T17:04:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0707.2769","created_at":"2026-07-04T17:04:44Z"},{"alias_kind":"pith_short_12","alias_value":"FEOPYCCHJ3Q5","created_at":"2026-07-04T17:04:44Z"},{"alias_kind":"pith_short_16","alias_value":"FEOPYCCHJ3Q5KTUS","created_at":"2026-07-04T17:04:44Z"},{"alias_kind":"pith_short_8","alias_value":"FEOPYCCH","created_at":"2026-07-04T17:04:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:FEOPYCCHJ3Q5KTUSQCVPYQ5SD7","target":"record","payload":{"canonical_record":{"source":{"id":"0707.2769","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-07-18T17:24:12Z","cross_cats_sorted":[],"title_canon_sha256":"4272957e07888cde914199ab08d32c0cb45253b63c3929fc9941dd86fa36b321","abstract_canon_sha256":"4bcdf27a9ae9af9e3bbb8a96a38ee95214ca2d56402d9c09e54699269caa4f9e"},"schema_version":"1.0"},"canonical_sha256":"291cfc08474ee1d54e9280aafc43b21fc06eecc3d68088cd17d895620c08d050","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:04:44.818557Z","signature_b64":"KLYVUmkwlZrPA++0GXiRs0lEr75LCDAsk5vnuS5GOKV9hKi6Jb3oUV1UsaDNr896xlELFymoC8oT5Pf1Cvv0BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"291cfc08474ee1d54e9280aafc43b21fc06eecc3d68088cd17d895620c08d050","last_reissued_at":"2026-07-04T17:04:44.818156Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:04:44.818156Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0707.2769","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":"2026-07-04T17:04:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1TD+113x2RXhBnSe59lWED0F9Ef193tFa2EHQXaLWgRYpjuJMdTJzY8fJHbjIFepJHXEOqwbBr9udobxIShvAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T19:26:24.705182Z"},"content_sha256":"120d1c44872abb41c01d5658488273d8f10871e82b37c286c6cbf3181b214716","schema_version":"1.0","event_id":"sha256:120d1c44872abb41c01d5658488273d8f10871e82b37c286c6cbf3181b214716"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:FEOPYCCHJ3Q5KTUSQCVPYQ5SD7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dynamics of Dense Cores in the Perseus Molecular Cloud","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Doug Johnstone, Helen Kirk, Mario Tafalla","submitted_at":"2007-07-18T17:24:12Z","abstract_excerpt":"We survey the kinematics of over one hundred and fifty candidate (and potentially star-forming) dense cores in the Perseus molecular cloud with pointed N2H+(1-0) and simultaneous C18O(2-1) observations. Our detection rate of N2H+ is 62%, rising to 84% for JCMT SCUBA-selected targets. In agreement with previous observations, we find that the dense N2H+ targets tend to display nearly thermal linewidths, particularly those which appear to be starless (using Spitzer data), indicating turbulent support on the small scales of molecular clouds is minimal. For those N2H+ targets which have an associat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0707.2769","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0707.2769/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":"2026-07-04T17:04:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yE80vn4oJ+hOqQcqSvqNVg4qoJJTruz/9lxgGtCezT2TthHjvgWjLmt/wFWl/cEum5QP/3PppUMfIzTv1JjtCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T19:26:24.709269Z"},"content_sha256":"ea497ab6833c024635b13f3b4b7727439d2dff40e8ac504fb4a54b76f9043c8e","schema_version":"1.0","event_id":"sha256:ea497ab6833c024635b13f3b4b7727439d2dff40e8ac504fb4a54b76f9043c8e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FEOPYCCHJ3Q5KTUSQCVPYQ5SD7/bundle.json","state_url":"https://pith.science/pith/FEOPYCCHJ3Q5KTUSQCVPYQ5SD7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FEOPYCCHJ3Q5KTUSQCVPYQ5SD7/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":"2026-08-04T19:26:24Z","links":{"resolver":"https://pith.science/pith/FEOPYCCHJ3Q5KTUSQCVPYQ5SD7","bundle":"https://pith.science/pith/FEOPYCCHJ3Q5KTUSQCVPYQ5SD7/bundle.json","state":"https://pith.science/pith/FEOPYCCHJ3Q5KTUSQCVPYQ5SD7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FEOPYCCHJ3Q5KTUSQCVPYQ5SD7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:FEOPYCCHJ3Q5KTUSQCVPYQ5SD7","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":"4bcdf27a9ae9af9e3bbb8a96a38ee95214ca2d56402d9c09e54699269caa4f9e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-07-18T17:24:12Z","title_canon_sha256":"4272957e07888cde914199ab08d32c0cb45253b63c3929fc9941dd86fa36b321"},"schema_version":"1.0","source":{"id":"0707.2769","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0707.2769","created_at":"2026-07-04T17:04:44Z"},{"alias_kind":"arxiv_version","alias_value":"0707.2769v1","created_at":"2026-07-04T17:04:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0707.2769","created_at":"2026-07-04T17:04:44Z"},{"alias_kind":"pith_short_12","alias_value":"FEOPYCCHJ3Q5","created_at":"2026-07-04T17:04:44Z"},{"alias_kind":"pith_short_16","alias_value":"FEOPYCCHJ3Q5KTUS","created_at":"2026-07-04T17:04:44Z"},{"alias_kind":"pith_short_8","alias_value":"FEOPYCCH","created_at":"2026-07-04T17:04:44Z"}],"graph_snapshots":[{"event_id":"sha256:ea497ab6833c024635b13f3b4b7727439d2dff40e8ac504fb4a54b76f9043c8e","target":"graph","created_at":"2026-07-04T17:04:44Z","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/0707.2769/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We survey the kinematics of over one hundred and fifty candidate (and potentially star-forming) dense cores in the Perseus molecular cloud with pointed N2H+(1-0) and simultaneous C18O(2-1) observations. Our detection rate of N2H+ is 62%, rising to 84% for JCMT SCUBA-selected targets. In agreement with previous observations, we find that the dense N2H+ targets tend to display nearly thermal linewidths, particularly those which appear to be starless (using Spitzer data), indicating turbulent support on the small scales of molecular clouds is minimal. For those N2H+ targets which have an associat","authors_text":"Doug Johnstone, Helen Kirk, Mario Tafalla","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-07-18T17:24:12Z","title":"Dynamics of Dense Cores in the Perseus Molecular Cloud"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0707.2769","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":"sha256:120d1c44872abb41c01d5658488273d8f10871e82b37c286c6cbf3181b214716","target":"record","created_at":"2026-07-04T17:04:44Z","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":"4bcdf27a9ae9af9e3bbb8a96a38ee95214ca2d56402d9c09e54699269caa4f9e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-07-18T17:24:12Z","title_canon_sha256":"4272957e07888cde914199ab08d32c0cb45253b63c3929fc9941dd86fa36b321"},"schema_version":"1.0","source":{"id":"0707.2769","kind":"arxiv","version":1}},"canonical_sha256":"291cfc08474ee1d54e9280aafc43b21fc06eecc3d68088cd17d895620c08d050","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"291cfc08474ee1d54e9280aafc43b21fc06eecc3d68088cd17d895620c08d050","first_computed_at":"2026-07-04T17:04:44.818156Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:04:44.818156Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KLYVUmkwlZrPA++0GXiRs0lEr75LCDAsk5vnuS5GOKV9hKi6Jb3oUV1UsaDNr896xlELFymoC8oT5Pf1Cvv0BA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:04:44.818557Z","signed_message":"canonical_sha256_bytes"},"source_id":"0707.2769","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:120d1c44872abb41c01d5658488273d8f10871e82b37c286c6cbf3181b214716","sha256:ea497ab6833c024635b13f3b4b7727439d2dff40e8ac504fb4a54b76f9043c8e"],"state_sha256":"048d6a8a99951acab0b42a44524ac471e02d5295a9dbc88cdb908cdcde056632"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WojJ+hVSZiCOPlDTeE70J+vx5XahzutVZM+X2cp7DTnXP+oHU0erICOUd20ZfzGsLLsFxNhOE0nEUGzsh2ElBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T19:26:24.719279Z","bundle_sha256":"a55016d2d527a02e759dfd3244cf432d2d745937848ee81f8e1b466e2e80f796"}}