{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:5NJQUVI3LMZMTQF5A2ARZMJ7YS","short_pith_number":"pith:5NJQUVI3","canonical_record":{"source":{"id":"1502.03822","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-12T21:00:10Z","cross_cats_sorted":[],"title_canon_sha256":"d336c2b0683e989021d02eb83e9c9215413eb24cc6fcb550c32f62f9b1afe489","abstract_canon_sha256":"cd528a4d078ccfa2453cdf33a45b931a2b7c285e1dbe35ea63a38577f016915c"},"schema_version":"1.0"},"canonical_sha256":"eb530a551b5b32c9c0bd06811cb13fc4b408c05a5506a2c4175177c99c3dbb23","source":{"kind":"arxiv","id":"1502.03822","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.03822","created_at":"2026-05-18T01:41:03Z"},{"alias_kind":"arxiv_version","alias_value":"1502.03822v1","created_at":"2026-05-18T01:41:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.03822","created_at":"2026-05-18T01:41:03Z"},{"alias_kind":"pith_short_12","alias_value":"5NJQUVI3LMZM","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"5NJQUVI3LMZMTQF5","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"5NJQUVI3","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:5NJQUVI3LMZMTQF5A2ARZMJ7YS","target":"record","payload":{"canonical_record":{"source":{"id":"1502.03822","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-12T21:00:10Z","cross_cats_sorted":[],"title_canon_sha256":"d336c2b0683e989021d02eb83e9c9215413eb24cc6fcb550c32f62f9b1afe489","abstract_canon_sha256":"cd528a4d078ccfa2453cdf33a45b931a2b7c285e1dbe35ea63a38577f016915c"},"schema_version":"1.0"},"canonical_sha256":"eb530a551b5b32c9c0bd06811cb13fc4b408c05a5506a2c4175177c99c3dbb23","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:03.497586Z","signature_b64":"Q9ROvmPUfz+Ec/hvRlXDZG8/gPil1Fm8Bt/L6I4YoDAUaWQcqz9zjM75MF+hoDWKybw+46/KDfjGQIdNajPxCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eb530a551b5b32c9c0bd06811cb13fc4b408c05a5506a2c4175177c99c3dbb23","last_reissued_at":"2026-05-18T01:41:03.496974Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:03.496974Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.03822","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":"2026-05-18T01:41:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mGHCqnFF16ubWJGQ7rxOLfvbtBjfdipdY6O7kCH7gqdoen7sFrQxRn0YCNKnwoYjiixK1FM9j5YXpJ5a3v+oCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:36:46.318381Z"},"content_sha256":"ae5df5900650ffa8f42a25b63417879704ec1813c8c840ca7d067beac4587e57","schema_version":"1.0","event_id":"sha256:ae5df5900650ffa8f42a25b63417879704ec1813c8c840ca7d067beac4587e57"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:5NJQUVI3LMZMTQF5A2ARZMJ7YS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tracing the Conversion of Gas into Stars in Young Massive Cluster Progenitors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"D. L. Walker, J. B. Foster, J. M. D. Kruijssen, J. M. Jackson, J. M. Rathborne, N. Bastian, S. N. Longmore, Y. Contreras","submitted_at":"2015-02-12T21:00:10Z","abstract_excerpt":"Whilst young massive clusters (YMCs; $M$ $\\gtrsim$ 10$^{4}$ M$_{\\odot}$, age $\\lesssim$ 100 Myr) have been identified in significant numbers, their progenitor gas clouds have eluded detection. Recently, four extreme molecular clouds residing within 200 pc of the Galactic centre have been identified as having the properties thought necessary to form YMCs. Here we utilise far-IR continuum data from the Herschel Infrared Galactic Plane Survey (HiGAL) and millimetre spectral line data from the Millimetre Astronomy Legacy Team 90 GHz Survey (MALT90) to determine their global physical and kinematic "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.03822","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":"2026-05-18T01:41:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9TnbI/Exzyrx42IKMXF8ephSgRCmSJt6UuyJKSdi8evhSTfiH3ksPjY1qcojYeeWh8EI2Nj/QyzGmyuFr2tpAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:36:46.318745Z"},"content_sha256":"bb5945bd22db09f0fc7142ef4daa304d1e388dc920bcbcc023ccca3748f3cf1e","schema_version":"1.0","event_id":"sha256:bb5945bd22db09f0fc7142ef4daa304d1e388dc920bcbcc023ccca3748f3cf1e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5NJQUVI3LMZMTQF5A2ARZMJ7YS/bundle.json","state_url":"https://pith.science/pith/5NJQUVI3LMZMTQF5A2ARZMJ7YS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5NJQUVI3LMZMTQF5A2ARZMJ7YS/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":"2026-05-26T20:36:46Z","links":{"resolver":"https://pith.science/pith/5NJQUVI3LMZMTQF5A2ARZMJ7YS","bundle":"https://pith.science/pith/5NJQUVI3LMZMTQF5A2ARZMJ7YS/bundle.json","state":"https://pith.science/pith/5NJQUVI3LMZMTQF5A2ARZMJ7YS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5NJQUVI3LMZMTQF5A2ARZMJ7YS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:5NJQUVI3LMZMTQF5A2ARZMJ7YS","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":"cd528a4d078ccfa2453cdf33a45b931a2b7c285e1dbe35ea63a38577f016915c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-12T21:00:10Z","title_canon_sha256":"d336c2b0683e989021d02eb83e9c9215413eb24cc6fcb550c32f62f9b1afe489"},"schema_version":"1.0","source":{"id":"1502.03822","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.03822","created_at":"2026-05-18T01:41:03Z"},{"alias_kind":"arxiv_version","alias_value":"1502.03822v1","created_at":"2026-05-18T01:41:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.03822","created_at":"2026-05-18T01:41:03Z"},{"alias_kind":"pith_short_12","alias_value":"5NJQUVI3LMZM","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"5NJQUVI3LMZMTQF5","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"5NJQUVI3","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:bb5945bd22db09f0fc7142ef4daa304d1e388dc920bcbcc023ccca3748f3cf1e","target":"graph","created_at":"2026-05-18T01:41:03Z","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":"Whilst young massive clusters (YMCs; $M$ $\\gtrsim$ 10$^{4}$ M$_{\\odot}$, age $\\lesssim$ 100 Myr) have been identified in significant numbers, their progenitor gas clouds have eluded detection. Recently, four extreme molecular clouds residing within 200 pc of the Galactic centre have been identified as having the properties thought necessary to form YMCs. Here we utilise far-IR continuum data from the Herschel Infrared Galactic Plane Survey (HiGAL) and millimetre spectral line data from the Millimetre Astronomy Legacy Team 90 GHz Survey (MALT90) to determine their global physical and kinematic ","authors_text":"D. L. Walker, J. B. Foster, J. M. D. Kruijssen, J. M. Jackson, J. M. Rathborne, N. Bastian, S. N. Longmore, Y. Contreras","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-12T21:00:10Z","title":"Tracing the Conversion of Gas into Stars in Young Massive Cluster Progenitors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.03822","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:ae5df5900650ffa8f42a25b63417879704ec1813c8c840ca7d067beac4587e57","target":"record","created_at":"2026-05-18T01:41:03Z","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":"cd528a4d078ccfa2453cdf33a45b931a2b7c285e1dbe35ea63a38577f016915c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-12T21:00:10Z","title_canon_sha256":"d336c2b0683e989021d02eb83e9c9215413eb24cc6fcb550c32f62f9b1afe489"},"schema_version":"1.0","source":{"id":"1502.03822","kind":"arxiv","version":1}},"canonical_sha256":"eb530a551b5b32c9c0bd06811cb13fc4b408c05a5506a2c4175177c99c3dbb23","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eb530a551b5b32c9c0bd06811cb13fc4b408c05a5506a2c4175177c99c3dbb23","first_computed_at":"2026-05-18T01:41:03.496974Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:03.496974Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q9ROvmPUfz+Ec/hvRlXDZG8/gPil1Fm8Bt/L6I4YoDAUaWQcqz9zjM75MF+hoDWKybw+46/KDfjGQIdNajPxCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:03.497586Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.03822","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ae5df5900650ffa8f42a25b63417879704ec1813c8c840ca7d067beac4587e57","sha256:bb5945bd22db09f0fc7142ef4daa304d1e388dc920bcbcc023ccca3748f3cf1e"],"state_sha256":"f9d622160f62f00a4c063a7281b46cfeb1415ea12430bf43c0c4d6225f230884"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fr47eBmUB+dx7VRPPNwaFEHiFRdduWjbDwRI1U4hZNQxGVknbX9Cd8XP0ZkZ+xLZKyZVf0y/iQordOrEmZFOCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T20:36:46.320865Z","bundle_sha256":"8d5215209a2e2a71088b840c4da8025c5bd105fa399df3e12a70ef8f7d40d275"}}