{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:UWMSP7OHZSWZOWJQ2KU4HXWW56","short_pith_number":"pith:UWMSP7OH","canonical_record":{"source":{"id":"1007.0702","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-07-05T15:23:52Z","cross_cats_sorted":[],"title_canon_sha256":"4c49a0083e86bf6b33ab0cf6d1a69bfbca566689b34142e7d4bbba96a07c45fc","abstract_canon_sha256":"f58fd4b5dafd676eb6f5d6b3742e1e772b7d5cf3a1bf3955c0e2b4e37210e6b8"},"schema_version":"1.0"},"canonical_sha256":"a59927fdc7ccad975930d2a9c3ded6ef9f04f186a353ebb8bb3ccbd048ccfccb","source":{"kind":"arxiv","id":"1007.0702","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.0702","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"arxiv_version","alias_value":"1007.0702v1","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.0702","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"pith_short_12","alias_value":"UWMSP7OHZSWZ","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"UWMSP7OHZSWZOWJQ","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"UWMSP7OH","created_at":"2026-05-18T12:26:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:UWMSP7OHZSWZOWJQ2KU4HXWW56","target":"record","payload":{"canonical_record":{"source":{"id":"1007.0702","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-07-05T15:23:52Z","cross_cats_sorted":[],"title_canon_sha256":"4c49a0083e86bf6b33ab0cf6d1a69bfbca566689b34142e7d4bbba96a07c45fc","abstract_canon_sha256":"f58fd4b5dafd676eb6f5d6b3742e1e772b7d5cf3a1bf3955c0e2b4e37210e6b8"},"schema_version":"1.0"},"canonical_sha256":"a59927fdc7ccad975930d2a9c3ded6ef9f04f186a353ebb8bb3ccbd048ccfccb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:53.786567Z","signature_b64":"/Bx87doPO6MXvo0q2gACqYOrSD/Wh9/m+tZ29jd4tCw+eihttTiDdyS3Ip51Uv/SVDJA5IUQuWDUTIa48YdjCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a59927fdc7ccad975930d2a9c3ded6ef9f04f186a353ebb8bb3ccbd048ccfccb","last_reissued_at":"2026-05-18T01:16:53.785847Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:53.785847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1007.0702","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":"2026-05-18T01:16:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nZ3UwpAuu+fGpooTLMOMAFZqwRdZ+VgY5attXuk40IrEIVQyaycR9DShqld+TMvwpmQwwgJlrO2QsFDtGPM4BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T20:22:55.653388Z"},"content_sha256":"539f9028f30c332318f8f9ebdc7c6d05e99d9254e164abff0587adf89d68c2f3","schema_version":"1.0","event_id":"sha256:539f9028f30c332318f8f9ebdc7c6d05e99d9254e164abff0587adf89d68c2f3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:UWMSP7OHZSWZOWJQ2KU4HXWW56","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Molecular Cloud Formation and the Star Formation Efficiency in M~33","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Carsten Kramer, Erwan Gardan, Fatemeh Tabatabaei, Jonathan Braine, Karl F. Schuster, Pierre Gratier","submitted_at":"2010-07-05T15:23:52Z","abstract_excerpt":"Does star formation proceed in the same way in large spirals such as the Milky Way and in smaller chemically younger galaxies? Earlier work suggests a more rapid transformation of H$_2$ into stars in these objects but (1) a doubt remains about the validity of the H$_2$ mass estimates and (2) there is currently no explanation for why star formation should be more efficient. M~33, a local group spiral with a mass $\\sim 10$\\% and a metallicity half that of the Galaxy, represents a first step towards the metal poor Dwarf Galaxies. We have searched for molecular clouds in the outer disk of M~33 and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.0702","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":"2026-05-18T01:16:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h40JeVlvhnhvjgFh3g5mRFU7bqrZ0RCb4P0ZBhTj2kkZLnwTz9zBh35iz6UwHwzGPq270WggQSnsHnYh/jhECg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T20:22:55.654044Z"},"content_sha256":"4fbb0e9ec8f4d3d5f96418b2a05fe32a9a186fd157f1cec0d3dfcfc59aa6bda3","schema_version":"1.0","event_id":"sha256:4fbb0e9ec8f4d3d5f96418b2a05fe32a9a186fd157f1cec0d3dfcfc59aa6bda3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UWMSP7OHZSWZOWJQ2KU4HXWW56/bundle.json","state_url":"https://pith.science/pith/UWMSP7OHZSWZOWJQ2KU4HXWW56/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UWMSP7OHZSWZOWJQ2KU4HXWW56/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":"2026-05-31T20:22:55Z","links":{"resolver":"https://pith.science/pith/UWMSP7OHZSWZOWJQ2KU4HXWW56","bundle":"https://pith.science/pith/UWMSP7OHZSWZOWJQ2KU4HXWW56/bundle.json","state":"https://pith.science/pith/UWMSP7OHZSWZOWJQ2KU4HXWW56/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UWMSP7OHZSWZOWJQ2KU4HXWW56/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:UWMSP7OHZSWZOWJQ2KU4HXWW56","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":"f58fd4b5dafd676eb6f5d6b3742e1e772b7d5cf3a1bf3955c0e2b4e37210e6b8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-07-05T15:23:52Z","title_canon_sha256":"4c49a0083e86bf6b33ab0cf6d1a69bfbca566689b34142e7d4bbba96a07c45fc"},"schema_version":"1.0","source":{"id":"1007.0702","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.0702","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"arxiv_version","alias_value":"1007.0702v1","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.0702","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"pith_short_12","alias_value":"UWMSP7OHZSWZ","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"UWMSP7OHZSWZOWJQ","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"UWMSP7OH","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:4fbb0e9ec8f4d3d5f96418b2a05fe32a9a186fd157f1cec0d3dfcfc59aa6bda3","target":"graph","created_at":"2026-05-18T01:16:53Z","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":"Does star formation proceed in the same way in large spirals such as the Milky Way and in smaller chemically younger galaxies? Earlier work suggests a more rapid transformation of H$_2$ into stars in these objects but (1) a doubt remains about the validity of the H$_2$ mass estimates and (2) there is currently no explanation for why star formation should be more efficient. M~33, a local group spiral with a mass $\\sim 10$\\% and a metallicity half that of the Galaxy, represents a first step towards the metal poor Dwarf Galaxies. We have searched for molecular clouds in the outer disk of M~33 and","authors_text":"Carsten Kramer, Erwan Gardan, Fatemeh Tabatabaei, Jonathan Braine, Karl F. Schuster, Pierre Gratier","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-07-05T15:23:52Z","title":"Molecular Cloud Formation and the Star Formation Efficiency in M~33"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.0702","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":"sha256:539f9028f30c332318f8f9ebdc7c6d05e99d9254e164abff0587adf89d68c2f3","target":"record","created_at":"2026-05-18T01:16:53Z","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":"f58fd4b5dafd676eb6f5d6b3742e1e772b7d5cf3a1bf3955c0e2b4e37210e6b8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-07-05T15:23:52Z","title_canon_sha256":"4c49a0083e86bf6b33ab0cf6d1a69bfbca566689b34142e7d4bbba96a07c45fc"},"schema_version":"1.0","source":{"id":"1007.0702","kind":"arxiv","version":1}},"canonical_sha256":"a59927fdc7ccad975930d2a9c3ded6ef9f04f186a353ebb8bb3ccbd048ccfccb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a59927fdc7ccad975930d2a9c3ded6ef9f04f186a353ebb8bb3ccbd048ccfccb","first_computed_at":"2026-05-18T01:16:53.785847Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:53.785847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/Bx87doPO6MXvo0q2gACqYOrSD/Wh9/m+tZ29jd4tCw+eihttTiDdyS3Ip51Uv/SVDJA5IUQuWDUTIa48YdjCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:53.786567Z","signed_message":"canonical_sha256_bytes"},"source_id":"1007.0702","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:539f9028f30c332318f8f9ebdc7c6d05e99d9254e164abff0587adf89d68c2f3","sha256:4fbb0e9ec8f4d3d5f96418b2a05fe32a9a186fd157f1cec0d3dfcfc59aa6bda3"],"state_sha256":"5af82a7509025aed7c1b94418f1b88f975229d5271735a218cfcc9c77c170851"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WVnuNwbeAQp3WiTs+tpYfGDjaQwJaRfQ5mIsdR1dFKmivGclECET8hVauUKEqWM+8m8av1ZYk3kq3eMIjIxoBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T20:22:55.657515Z","bundle_sha256":"9a0981e472ddfcc23ac7680203d520bc49dddd78a61cf0edcb6074d84d2b73d4"}}