{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:OV7AQGMBE4NPVQTM3R6VF5AYOU","short_pith_number":"pith:OV7AQGMB","canonical_record":{"source":{"id":"1010.1539","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-07T20:07:25Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f0511abfaac78bbf7dd7d134969963c090701905b141ea20efd8b41c5d7fa86f","abstract_canon_sha256":"ea87b268afe60060e5f89b59e1b1a9b9fafe0214a02d08957a44916cff23425e"},"schema_version":"1.0"},"canonical_sha256":"757e081981271afac26cdc7d52f4187512bc0fc83805114a022c0b4f70574c7a","source":{"kind":"arxiv","id":"1010.1539","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.1539","created_at":"2026-05-18T04:23:23Z"},{"alias_kind":"arxiv_version","alias_value":"1010.1539v2","created_at":"2026-05-18T04:23:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.1539","created_at":"2026-05-18T04:23:23Z"},{"alias_kind":"pith_short_12","alias_value":"OV7AQGMBE4NP","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"OV7AQGMBE4NPVQTM","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"OV7AQGMB","created_at":"2026-05-18T12:26:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:OV7AQGMBE4NPVQTM3R6VF5AYOU","target":"record","payload":{"canonical_record":{"source":{"id":"1010.1539","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-07T20:07:25Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f0511abfaac78bbf7dd7d134969963c090701905b141ea20efd8b41c5d7fa86f","abstract_canon_sha256":"ea87b268afe60060e5f89b59e1b1a9b9fafe0214a02d08957a44916cff23425e"},"schema_version":"1.0"},"canonical_sha256":"757e081981271afac26cdc7d52f4187512bc0fc83805114a022c0b4f70574c7a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:23.069002Z","signature_b64":"Avl+Aq29Wjmk7zvleev92Q+w/pN769nAO0i62G3VVEjxQfh8x4GGRdfp5YZU0AGEYX98GZ1ixDOFQg0TyVSKDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"757e081981271afac26cdc7d52f4187512bc0fc83805114a022c0b4f70574c7a","last_reissued_at":"2026-05-18T04:23:23.068470Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:23.068470Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1010.1539","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":"2026-05-18T04:23:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AjR1J7xR20U2gkzZsKT46nsbSvssIAZNRdiYvSoGAMICCXa0ftILoS15nEC/mVqETtqMuiO9qgEY7PF0iJV8Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T22:15:42.382448Z"},"content_sha256":"cfc17a3d187a30f3ee1a30aca25e397dd6bc4824ef8dd87981f81f5884fd2815","schema_version":"1.0","event_id":"sha256:cfc17a3d187a30f3ee1a30aca25e397dd6bc4824ef8dd87981f81f5884fd2815"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:OV7AQGMBE4NPVQTM3R6VF5AYOU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"How Universal is the SFR - H2 Relation?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"A. V. Kravtsov, N. Y. Gnedin, R. Feldmann","submitted_at":"2010-10-07T20:07:25Z","abstract_excerpt":"It is a well established empirical fact that the surface density of the star formation rate, Sigma_SFR, strongly correlates with the surface density of molecular hydrogen, Sigma_H2, at least when averaged over large (~kpc) scales. Much less is known, however, if (and how) the Sigma_SFR-Sigma_H2 relation depends on environmental parameters, such as the metallicity or the UV radiation field in the interstellar medium (ISM). Furthermore, observations indicate that the scatter in the Sigma_SFR-Sigma_H2 relation increases rapidly with decreasing averaging scale. How the scale-dependent scatter is g"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1539","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":"2026-05-18T04:23:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"veHOZhGkdtTTqYasWsfMNiVIa0d63hlqMz4wRJHdPpdfYQeUv6URBw13Net8Go9tIhmaVRewGDHLIfoJpWjFCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T22:15:42.382794Z"},"content_sha256":"ed78e0b8138695c5276e1fe7820fa4a27174aa5a0fa892b8d5d7f60f446aed4b","schema_version":"1.0","event_id":"sha256:ed78e0b8138695c5276e1fe7820fa4a27174aa5a0fa892b8d5d7f60f446aed4b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OV7AQGMBE4NPVQTM3R6VF5AYOU/bundle.json","state_url":"https://pith.science/pith/OV7AQGMBE4NPVQTM3R6VF5AYOU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OV7AQGMBE4NPVQTM3R6VF5AYOU/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":"2026-06-28T22:15:42Z","links":{"resolver":"https://pith.science/pith/OV7AQGMBE4NPVQTM3R6VF5AYOU","bundle":"https://pith.science/pith/OV7AQGMBE4NPVQTM3R6VF5AYOU/bundle.json","state":"https://pith.science/pith/OV7AQGMBE4NPVQTM3R6VF5AYOU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OV7AQGMBE4NPVQTM3R6VF5AYOU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:OV7AQGMBE4NPVQTM3R6VF5AYOU","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":"ea87b268afe60060e5f89b59e1b1a9b9fafe0214a02d08957a44916cff23425e","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-07T20:07:25Z","title_canon_sha256":"f0511abfaac78bbf7dd7d134969963c090701905b141ea20efd8b41c5d7fa86f"},"schema_version":"1.0","source":{"id":"1010.1539","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.1539","created_at":"2026-05-18T04:23:23Z"},{"alias_kind":"arxiv_version","alias_value":"1010.1539v2","created_at":"2026-05-18T04:23:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.1539","created_at":"2026-05-18T04:23:23Z"},{"alias_kind":"pith_short_12","alias_value":"OV7AQGMBE4NP","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"OV7AQGMBE4NPVQTM","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"OV7AQGMB","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:ed78e0b8138695c5276e1fe7820fa4a27174aa5a0fa892b8d5d7f60f446aed4b","target":"graph","created_at":"2026-05-18T04:23:23Z","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":"It is a well established empirical fact that the surface density of the star formation rate, Sigma_SFR, strongly correlates with the surface density of molecular hydrogen, Sigma_H2, at least when averaged over large (~kpc) scales. Much less is known, however, if (and how) the Sigma_SFR-Sigma_H2 relation depends on environmental parameters, such as the metallicity or the UV radiation field in the interstellar medium (ISM). Furthermore, observations indicate that the scatter in the Sigma_SFR-Sigma_H2 relation increases rapidly with decreasing averaging scale. How the scale-dependent scatter is g","authors_text":"A. V. Kravtsov, N. Y. Gnedin, R. Feldmann","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-07T20:07:25Z","title":"How Universal is the SFR - H2 Relation?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1539","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:cfc17a3d187a30f3ee1a30aca25e397dd6bc4824ef8dd87981f81f5884fd2815","target":"record","created_at":"2026-05-18T04:23:23Z","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":"ea87b268afe60060e5f89b59e1b1a9b9fafe0214a02d08957a44916cff23425e","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-07T20:07:25Z","title_canon_sha256":"f0511abfaac78bbf7dd7d134969963c090701905b141ea20efd8b41c5d7fa86f"},"schema_version":"1.0","source":{"id":"1010.1539","kind":"arxiv","version":2}},"canonical_sha256":"757e081981271afac26cdc7d52f4187512bc0fc83805114a022c0b4f70574c7a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"757e081981271afac26cdc7d52f4187512bc0fc83805114a022c0b4f70574c7a","first_computed_at":"2026-05-18T04:23:23.068470Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:23:23.068470Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Avl+Aq29Wjmk7zvleev92Q+w/pN769nAO0i62G3VVEjxQfh8x4GGRdfp5YZU0AGEYX98GZ1ixDOFQg0TyVSKDw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:23:23.069002Z","signed_message":"canonical_sha256_bytes"},"source_id":"1010.1539","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cfc17a3d187a30f3ee1a30aca25e397dd6bc4824ef8dd87981f81f5884fd2815","sha256:ed78e0b8138695c5276e1fe7820fa4a27174aa5a0fa892b8d5d7f60f446aed4b"],"state_sha256":"a049c0547add6b485f68f5c878bd517e52bc9472e5471c100779eea9bb0b95e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iU9k743DWJdkKp8/mMsd6YtY5wBXzoCrG0rDw4sgCiqBMo1+Ni3HaXUh3lzj6PUmg94dcmmv6LbsKpEmq9mNDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T22:15:42.384660Z","bundle_sha256":"8e1969ddaf345d10c60ba6c1913f82d9e99e505da20f56ee2dcbca74b2ef9f5b"}}