{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:JH3DLDUVC4XJBXZHEPP5VFMCH4","short_pith_number":"pith:JH3DLDUV","canonical_record":{"source":{"id":"astro-ph/0602246","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-02-10T16:28:51Z","cross_cats_sorted":[],"title_canon_sha256":"384a9e36252f3f5d52cd2d08b8e5e20293eece4cee33931334cda1ef0a8feb06","abstract_canon_sha256":"ddec096cc355b475fe8c25182a70879daec2a2a9c8eb7aff348712d3297e347a"},"schema_version":"1.0"},"canonical_sha256":"49f6358e95172e90df2723dfda95823f3173b31bf50c8dcd85e17bdcab5e1d0f","source":{"kind":"arxiv","id":"astro-ph/0602246","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0602246","created_at":"2026-05-18T04:19:41Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0602246v1","created_at":"2026-05-18T04:19:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0602246","created_at":"2026-05-18T04:19:41Z"},{"alias_kind":"pith_short_12","alias_value":"JH3DLDUVC4XJ","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"JH3DLDUVC4XJBXZH","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"JH3DLDUV","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:JH3DLDUVC4XJBXZHEPP5VFMCH4","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0602246","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-02-10T16:28:51Z","cross_cats_sorted":[],"title_canon_sha256":"384a9e36252f3f5d52cd2d08b8e5e20293eece4cee33931334cda1ef0a8feb06","abstract_canon_sha256":"ddec096cc355b475fe8c25182a70879daec2a2a9c8eb7aff348712d3297e347a"},"schema_version":"1.0"},"canonical_sha256":"49f6358e95172e90df2723dfda95823f3173b31bf50c8dcd85e17bdcab5e1d0f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:19:41.578182Z","signature_b64":"JqybSOCE78zNOqsW1VzhZpYfvO/ZLO9EwEtx+AoPYuhpA8bZU11SAuRlRRc8auVXjYWvJ4M0SfxyW6GrQ0MNDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"49f6358e95172e90df2723dfda95823f3173b31bf50c8dcd85e17bdcab5e1d0f","last_reissued_at":"2026-05-18T04:19:41.577481Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:19:41.577481Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0602246","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":"2026-05-18T04:19:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r3VeJ83TkxILjoCQGd+L0ZRnWkAyclxjUfoos6fIeYjNx+YBQ6comRcbXE+QMnf3FLFvw6L3gJ5vGqOPiyqKDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T16:29:49.225308Z"},"content_sha256":"dc8227cbbe9bcb1c3bd6c64849b887e3036b9a5d57c8326b6f78e5d7a14ae49f","schema_version":"1.0","event_id":"sha256:dc8227cbbe9bcb1c3bd6c64849b887e3036b9a5d57c8326b6f78e5d7a14ae49f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:JH3DLDUVC4XJBXZHEPP5VFMCH4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Infrared Dark Clouds: precursors to star clusters","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J. M. Jackson, J. M. Rathborne, R. Simon","submitted_at":"2006-02-10T16:28:51Z","abstract_excerpt":"Infrared Dark Clouds (IRDCs) are dense molecular clouds seen as extinction features against the bright mid-infrared Galactic background. Millimeter continuum maps toward 38 IRDCs reveal extended cold dust emission to be associated with each of the IRDCs. IRDCs range in morphology from filamentary to compact and have masses of 120 to 16,000 Msun, with a median mass of ~940 Msun. Each IRDC contains at least one compact (<=0.5 pc) dust core and most show multiple cores. We find 140 cold millimeter cores unassociated with MSX 8um emission. The core masses range from 10 to 2,100 Msun, with a median"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0602246","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":"2026-05-18T04:19:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mSqjKo8+tHr4GguIRkoBpCJ820czOZelw0n5YWRFUcjYytrUaXtuGFzuZ4DbO2D+HPbrUq18tqKB/cqWkVFMBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T16:29:49.225693Z"},"content_sha256":"a375b0670ab4435dee00d7f102608a535dfc3e25c2868ff476ebd43b1c63c662","schema_version":"1.0","event_id":"sha256:a375b0670ab4435dee00d7f102608a535dfc3e25c2868ff476ebd43b1c63c662"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JH3DLDUVC4XJBXZHEPP5VFMCH4/bundle.json","state_url":"https://pith.science/pith/JH3DLDUVC4XJBXZHEPP5VFMCH4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JH3DLDUVC4XJBXZHEPP5VFMCH4/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":"2026-05-28T16:29:49Z","links":{"resolver":"https://pith.science/pith/JH3DLDUVC4XJBXZHEPP5VFMCH4","bundle":"https://pith.science/pith/JH3DLDUVC4XJBXZHEPP5VFMCH4/bundle.json","state":"https://pith.science/pith/JH3DLDUVC4XJBXZHEPP5VFMCH4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JH3DLDUVC4XJBXZHEPP5VFMCH4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:JH3DLDUVC4XJBXZHEPP5VFMCH4","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":"ddec096cc355b475fe8c25182a70879daec2a2a9c8eb7aff348712d3297e347a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-02-10T16:28:51Z","title_canon_sha256":"384a9e36252f3f5d52cd2d08b8e5e20293eece4cee33931334cda1ef0a8feb06"},"schema_version":"1.0","source":{"id":"astro-ph/0602246","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0602246","created_at":"2026-05-18T04:19:41Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0602246v1","created_at":"2026-05-18T04:19:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0602246","created_at":"2026-05-18T04:19:41Z"},{"alias_kind":"pith_short_12","alias_value":"JH3DLDUVC4XJ","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"JH3DLDUVC4XJBXZH","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"JH3DLDUV","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:a375b0670ab4435dee00d7f102608a535dfc3e25c2868ff476ebd43b1c63c662","target":"graph","created_at":"2026-05-18T04:19:41Z","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":"Infrared Dark Clouds (IRDCs) are dense molecular clouds seen as extinction features against the bright mid-infrared Galactic background. Millimeter continuum maps toward 38 IRDCs reveal extended cold dust emission to be associated with each of the IRDCs. IRDCs range in morphology from filamentary to compact and have masses of 120 to 16,000 Msun, with a median mass of ~940 Msun. Each IRDC contains at least one compact (<=0.5 pc) dust core and most show multiple cores. We find 140 cold millimeter cores unassociated with MSX 8um emission. The core masses range from 10 to 2,100 Msun, with a median","authors_text":"J. M. Jackson, J. M. Rathborne, R. Simon","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-02-10T16:28:51Z","title":"Infrared Dark Clouds: precursors to star clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0602246","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:dc8227cbbe9bcb1c3bd6c64849b887e3036b9a5d57c8326b6f78e5d7a14ae49f","target":"record","created_at":"2026-05-18T04:19:41Z","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":"ddec096cc355b475fe8c25182a70879daec2a2a9c8eb7aff348712d3297e347a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-02-10T16:28:51Z","title_canon_sha256":"384a9e36252f3f5d52cd2d08b8e5e20293eece4cee33931334cda1ef0a8feb06"},"schema_version":"1.0","source":{"id":"astro-ph/0602246","kind":"arxiv","version":1}},"canonical_sha256":"49f6358e95172e90df2723dfda95823f3173b31bf50c8dcd85e17bdcab5e1d0f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"49f6358e95172e90df2723dfda95823f3173b31bf50c8dcd85e17bdcab5e1d0f","first_computed_at":"2026-05-18T04:19:41.577481Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:19:41.577481Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JqybSOCE78zNOqsW1VzhZpYfvO/ZLO9EwEtx+AoPYuhpA8bZU11SAuRlRRc8auVXjYWvJ4M0SfxyW6GrQ0MNDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:19:41.578182Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0602246","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc8227cbbe9bcb1c3bd6c64849b887e3036b9a5d57c8326b6f78e5d7a14ae49f","sha256:a375b0670ab4435dee00d7f102608a535dfc3e25c2868ff476ebd43b1c63c662"],"state_sha256":"f4e93fa5ac9b0e2993326f9e640b8eb038974be0007d742b2c199fe8aea8b4ef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+7FyQCr7OpIutiJSEyQCpw/M0KjCk92CZGkdLjWnAinVqIVP35Z/jyYJ1uea8ztEraxCEayJD5p+jApkEiJKCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T16:29:49.227572Z","bundle_sha256":"e33c7f4ca0bb2f4bc2afe61edcea4b72113c6ca845eacd36dbced1a89201107b"}}