{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:IN5TZQ2P7X2UCEENCJ5FQ553ZX","short_pith_number":"pith:IN5TZQ2P","canonical_record":{"source":{"id":"1604.04954","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-18T01:39:31Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"0e629ddb063d2f49d577f984df1578b74313c51a967f5988a3d8a134f64ff8f5","abstract_canon_sha256":"2d455c8aacb7078d2384f74c8f12e026879f4005be9a1c7d737a4c0ade2e466d"},"schema_version":"1.0"},"canonical_sha256":"437b3cc34ffdf541108d127a5877bbcdf9d54aa72cfe9bcabf31122cc5607bf2","source":{"kind":"arxiv","id":"1604.04954","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.04954","created_at":"2026-05-18T01:10:30Z"},{"alias_kind":"arxiv_version","alias_value":"1604.04954v4","created_at":"2026-05-18T01:10:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.04954","created_at":"2026-05-18T01:10:30Z"},{"alias_kind":"pith_short_12","alias_value":"IN5TZQ2P7X2U","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"IN5TZQ2P7X2UCEEN","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"IN5TZQ2P","created_at":"2026-05-18T12:30:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:IN5TZQ2P7X2UCEENCJ5FQ553ZX","target":"record","payload":{"canonical_record":{"source":{"id":"1604.04954","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-18T01:39:31Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"0e629ddb063d2f49d577f984df1578b74313c51a967f5988a3d8a134f64ff8f5","abstract_canon_sha256":"2d455c8aacb7078d2384f74c8f12e026879f4005be9a1c7d737a4c0ade2e466d"},"schema_version":"1.0"},"canonical_sha256":"437b3cc34ffdf541108d127a5877bbcdf9d54aa72cfe9bcabf31122cc5607bf2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:30.522029Z","signature_b64":"Finy62pVlButjxKw5T9ZofSXot7rdGleP8SiPr+KMfQeQ7jbq7CnN1b6G+O5e/oPm5LzQEBXlpub7nR28bpuDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"437b3cc34ffdf541108d127a5877bbcdf9d54aa72cfe9bcabf31122cc5607bf2","last_reissued_at":"2026-05-18T01:10:30.521560Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:30.521560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.04954","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:10:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N+5WcWIesfqxOobbcGGCtcZEn7rDFufxKWL5RPOunlvRj3P31aVJEWISU+3gzDSmzmm8CAlY7bgEdOgwjyMqCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:02:27.213993Z"},"content_sha256":"3a45fd4e31c93fed355f004db1617b31b6f7cfa8a0f921a25d5ac02d8635eb15","schema_version":"1.0","event_id":"sha256:3a45fd4e31c93fed355f004db1617b31b6f7cfa8a0f921a25d5ac02d8635eb15"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:IN5TZQ2P7X2UCEENCJ5FQ553ZX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Revealing a detailed mass distribution of a high-density core MC27/L1521F in Taurus with ALMA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Akiko Kawamura, Kazuki Tokuda, Kazuya Saigo, Kengo Tachihara, Kengo Tomida, Masahiro N. Machida, Philippe Andr\\'e, Shu-ichiro Inutsuka, Tomoaki Matsumoto, Toshikazu Onishi, Yasuo Fukui","submitted_at":"2016-04-18T01:39:31Z","abstract_excerpt":"We present the results of ALMA observations of dust continuum emission and molecular rotational lines toward a dense core MC27 (aka L1521F) in Taurus, which is considered to be at a very early stage of star formation. The detailed column density distribution on size scales from a few tens AU to ~10,000 AU scale are revealed by combining the ALMA (12 m array + 7 m array) data with the published/unpublished single-dish data. The high angular resolution observations at 0.87 mm with a synthesized beam size of ~0.\"74 x 0.\"32 reveal that a protostellar source, MMS-1, is not spatially resolved and la"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.04954","kind":"arxiv","version":4},"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":"2026-05-18T01:10:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g/+ZFkozoFwfgifrrcUDr2uf/mwwKOv4QFmg0SX5SBoqUOpPpJtjhQ0sj1WBexiTAzF3nIZKQkC+ziRszH+GCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:02:27.214698Z"},"content_sha256":"c71858fa5e425e8e44fdefcd67c78aa2ade20699dd08b334c32ccefa2fe8a5ee","schema_version":"1.0","event_id":"sha256:c71858fa5e425e8e44fdefcd67c78aa2ade20699dd08b334c32ccefa2fe8a5ee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IN5TZQ2P7X2UCEENCJ5FQ553ZX/bundle.json","state_url":"https://pith.science/pith/IN5TZQ2P7X2UCEENCJ5FQ553ZX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IN5TZQ2P7X2UCEENCJ5FQ553ZX/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":"2026-05-27T07:02:27Z","links":{"resolver":"https://pith.science/pith/IN5TZQ2P7X2UCEENCJ5FQ553ZX","bundle":"https://pith.science/pith/IN5TZQ2P7X2UCEENCJ5FQ553ZX/bundle.json","state":"https://pith.science/pith/IN5TZQ2P7X2UCEENCJ5FQ553ZX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IN5TZQ2P7X2UCEENCJ5FQ553ZX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:IN5TZQ2P7X2UCEENCJ5FQ553ZX","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":"2d455c8aacb7078d2384f74c8f12e026879f4005be9a1c7d737a4c0ade2e466d","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-18T01:39:31Z","title_canon_sha256":"0e629ddb063d2f49d577f984df1578b74313c51a967f5988a3d8a134f64ff8f5"},"schema_version":"1.0","source":{"id":"1604.04954","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.04954","created_at":"2026-05-18T01:10:30Z"},{"alias_kind":"arxiv_version","alias_value":"1604.04954v4","created_at":"2026-05-18T01:10:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.04954","created_at":"2026-05-18T01:10:30Z"},{"alias_kind":"pith_short_12","alias_value":"IN5TZQ2P7X2U","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"IN5TZQ2P7X2UCEEN","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"IN5TZQ2P","created_at":"2026-05-18T12:30:22Z"}],"graph_snapshots":[{"event_id":"sha256:c71858fa5e425e8e44fdefcd67c78aa2ade20699dd08b334c32ccefa2fe8a5ee","target":"graph","created_at":"2026-05-18T01:10:30Z","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 present the results of ALMA observations of dust continuum emission and molecular rotational lines toward a dense core MC27 (aka L1521F) in Taurus, which is considered to be at a very early stage of star formation. The detailed column density distribution on size scales from a few tens AU to ~10,000 AU scale are revealed by combining the ALMA (12 m array + 7 m array) data with the published/unpublished single-dish data. The high angular resolution observations at 0.87 mm with a synthesized beam size of ~0.\"74 x 0.\"32 reveal that a protostellar source, MMS-1, is not spatially resolved and la","authors_text":"Akiko Kawamura, Kazuki Tokuda, Kazuya Saigo, Kengo Tachihara, Kengo Tomida, Masahiro N. Machida, Philippe Andr\\'e, Shu-ichiro Inutsuka, Tomoaki Matsumoto, Toshikazu Onishi, Yasuo Fukui","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-18T01:39:31Z","title":"Revealing a detailed mass distribution of a high-density core MC27/L1521F in Taurus with ALMA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.04954","kind":"arxiv","version":4},"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":"sha256:3a45fd4e31c93fed355f004db1617b31b6f7cfa8a0f921a25d5ac02d8635eb15","target":"record","created_at":"2026-05-18T01:10:30Z","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":"2d455c8aacb7078d2384f74c8f12e026879f4005be9a1c7d737a4c0ade2e466d","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-18T01:39:31Z","title_canon_sha256":"0e629ddb063d2f49d577f984df1578b74313c51a967f5988a3d8a134f64ff8f5"},"schema_version":"1.0","source":{"id":"1604.04954","kind":"arxiv","version":4}},"canonical_sha256":"437b3cc34ffdf541108d127a5877bbcdf9d54aa72cfe9bcabf31122cc5607bf2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"437b3cc34ffdf541108d127a5877bbcdf9d54aa72cfe9bcabf31122cc5607bf2","first_computed_at":"2026-05-18T01:10:30.521560Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:30.521560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Finy62pVlButjxKw5T9ZofSXot7rdGleP8SiPr+KMfQeQ7jbq7CnN1b6G+O5e/oPm5LzQEBXlpub7nR28bpuDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:30.522029Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.04954","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a45fd4e31c93fed355f004db1617b31b6f7cfa8a0f921a25d5ac02d8635eb15","sha256:c71858fa5e425e8e44fdefcd67c78aa2ade20699dd08b334c32ccefa2fe8a5ee"],"state_sha256":"c9fa0c78089c7a4e24c04f1649c8261136c2a078117a2a61420d4f80f2397e69"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rf33Yrs4WsD2gsCYR1K702puuBUIpdAXlmh9Q6O5SbbJMfNLQU6wcKM074npszsPvsEXft47oKQdfd7TfEaYDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T07:02:27.219081Z","bundle_sha256":"d8dcb1a283b76fcd60bcfa6424ee93a0b5b1212b080adaaa65ba045a7c4c7742"}}