{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:MFITYY37L4BDWTCI6JFVXBFB4M","short_pith_number":"pith:MFITYY37","canonical_record":{"source":{"id":"1303.2158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-03-09T02:30:57Z","cross_cats_sorted":[],"title_canon_sha256":"6bad8efefe25ec792a2d51303531f3e81f4f41755a2fb7f5e6bfac61be9bbaef","abstract_canon_sha256":"afcf0c8f8a8287e94c805b45c1d48a1811eefa61f92d156b604ed56cf0d6bee5"},"schema_version":"1.0"},"canonical_sha256":"61513c637f5f023b4c48f24b5b84a1e3260925f2762bfe1173621595358c635b","source":{"kind":"arxiv","id":"1303.2158","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.2158","created_at":"2026-05-18T01:51:09Z"},{"alias_kind":"arxiv_version","alias_value":"1303.2158v1","created_at":"2026-05-18T01:51:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.2158","created_at":"2026-05-18T01:51:09Z"},{"alias_kind":"pith_short_12","alias_value":"MFITYY37L4BD","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"MFITYY37L4BDWTCI","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"MFITYY37","created_at":"2026-05-18T12:27:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:MFITYY37L4BDWTCI6JFVXBFB4M","target":"record","payload":{"canonical_record":{"source":{"id":"1303.2158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-03-09T02:30:57Z","cross_cats_sorted":[],"title_canon_sha256":"6bad8efefe25ec792a2d51303531f3e81f4f41755a2fb7f5e6bfac61be9bbaef","abstract_canon_sha256":"afcf0c8f8a8287e94c805b45c1d48a1811eefa61f92d156b604ed56cf0d6bee5"},"schema_version":"1.0"},"canonical_sha256":"61513c637f5f023b4c48f24b5b84a1e3260925f2762bfe1173621595358c635b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:09.419331Z","signature_b64":"mNHn08RWDaOpvjfH5qqbbTbQmvqgpqaltLBm3z4Ee51vU0KVD70j8VwRYXnnR2jzF1PSDy4RsrqK7p75rIkDAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"61513c637f5f023b4c48f24b5b84a1e3260925f2762bfe1173621595358c635b","last_reissued_at":"2026-05-18T01:51:09.418618Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:09.418618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.2158","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":"2026-05-18T01:51:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xTg7WYm+OpZHYbea+ymf2L5P5tqXxpZ43qsXAWlKMtc+u8zPuCZu1GKvcI5O56ys5vmrCJ477qxdoFrawWWvAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T22:20:27.456118Z"},"content_sha256":"81cd391017c704a25ce93516b3a119298e154d609b7c820e966da0822f5b2779","schema_version":"1.0","event_id":"sha256:81cd391017c704a25ce93516b3a119298e154d609b7c820e966da0822f5b2779"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:MFITYY37L4BDWTCI6JFVXBFB4M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Transition of the Stellar Initial Mass Function Explored with Binary Population Synthesis","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Carolyn L. Doherty, Masayuki Y. Fujimoto, Peter R. Wood, Pilar Gil-Pons, Shimako Yamada, Simon W. Campbell, Takuma Suda, Wako Aoki, Yutaka Katsuta, Yutaka Komiya","submitted_at":"2013-03-09T02:30:57Z","abstract_excerpt":"The stellar initial mass function (IMF) plays a crucial role in determining the number of surviving stars in galaxies, the chemical composition of the interstellar medium, and the distribution of light in galaxies. A key unsolved question is whether the IMF is universal in time and space. Here we use state-of-the-art results of stellar evolution to show that the IMF of our Galaxy made a transition from an IMF dominated by massive stars to the present-day IMF at an early phase of the Galaxy formation. Updated results from stellar evolution in a wide range of metallicities have been implemented "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.2158","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":"2026-05-18T01:51:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vhiaFoN8VLw8ZsbMM2o0mTJaVJnt5Y7MZx6VygLhSFlxkuZQ6S1+XODndBcN2dqigNEN6eEXLBEdt5qdLaTOBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T22:20:27.456480Z"},"content_sha256":"10931723ddedad51f25757db590b3e00c5c2eee93fad2743ac1a31df5c1238cb","schema_version":"1.0","event_id":"sha256:10931723ddedad51f25757db590b3e00c5c2eee93fad2743ac1a31df5c1238cb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MFITYY37L4BDWTCI6JFVXBFB4M/bundle.json","state_url":"https://pith.science/pith/MFITYY37L4BDWTCI6JFVXBFB4M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MFITYY37L4BDWTCI6JFVXBFB4M/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":"2026-05-19T22:20:27Z","links":{"resolver":"https://pith.science/pith/MFITYY37L4BDWTCI6JFVXBFB4M","bundle":"https://pith.science/pith/MFITYY37L4BDWTCI6JFVXBFB4M/bundle.json","state":"https://pith.science/pith/MFITYY37L4BDWTCI6JFVXBFB4M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MFITYY37L4BDWTCI6JFVXBFB4M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:MFITYY37L4BDWTCI6JFVXBFB4M","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":"afcf0c8f8a8287e94c805b45c1d48a1811eefa61f92d156b604ed56cf0d6bee5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-03-09T02:30:57Z","title_canon_sha256":"6bad8efefe25ec792a2d51303531f3e81f4f41755a2fb7f5e6bfac61be9bbaef"},"schema_version":"1.0","source":{"id":"1303.2158","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.2158","created_at":"2026-05-18T01:51:09Z"},{"alias_kind":"arxiv_version","alias_value":"1303.2158v1","created_at":"2026-05-18T01:51:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.2158","created_at":"2026-05-18T01:51:09Z"},{"alias_kind":"pith_short_12","alias_value":"MFITYY37L4BD","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"MFITYY37L4BDWTCI","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"MFITYY37","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:10931723ddedad51f25757db590b3e00c5c2eee93fad2743ac1a31df5c1238cb","target":"graph","created_at":"2026-05-18T01:51:09Z","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":"The stellar initial mass function (IMF) plays a crucial role in determining the number of surviving stars in galaxies, the chemical composition of the interstellar medium, and the distribution of light in galaxies. A key unsolved question is whether the IMF is universal in time and space. Here we use state-of-the-art results of stellar evolution to show that the IMF of our Galaxy made a transition from an IMF dominated by massive stars to the present-day IMF at an early phase of the Galaxy formation. Updated results from stellar evolution in a wide range of metallicities have been implemented ","authors_text":"Carolyn L. Doherty, Masayuki Y. Fujimoto, Peter R. Wood, Pilar Gil-Pons, Shimako Yamada, Simon W. Campbell, Takuma Suda, Wako Aoki, Yutaka Katsuta, Yutaka Komiya","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-03-09T02:30:57Z","title":"Transition of the Stellar Initial Mass Function Explored with Binary Population Synthesis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.2158","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":"sha256:81cd391017c704a25ce93516b3a119298e154d609b7c820e966da0822f5b2779","target":"record","created_at":"2026-05-18T01:51:09Z","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":"afcf0c8f8a8287e94c805b45c1d48a1811eefa61f92d156b604ed56cf0d6bee5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-03-09T02:30:57Z","title_canon_sha256":"6bad8efefe25ec792a2d51303531f3e81f4f41755a2fb7f5e6bfac61be9bbaef"},"schema_version":"1.0","source":{"id":"1303.2158","kind":"arxiv","version":1}},"canonical_sha256":"61513c637f5f023b4c48f24b5b84a1e3260925f2762bfe1173621595358c635b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"61513c637f5f023b4c48f24b5b84a1e3260925f2762bfe1173621595358c635b","first_computed_at":"2026-05-18T01:51:09.418618Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:09.418618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mNHn08RWDaOpvjfH5qqbbTbQmvqgpqaltLBm3z4Ee51vU0KVD70j8VwRYXnnR2jzF1PSDy4RsrqK7p75rIkDAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:09.419331Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.2158","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:81cd391017c704a25ce93516b3a119298e154d609b7c820e966da0822f5b2779","sha256:10931723ddedad51f25757db590b3e00c5c2eee93fad2743ac1a31df5c1238cb"],"state_sha256":"3b18232e92824ca82a72b6755ce7a9f5e5d86d16bd58cd28d4108f6f357c6c08"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7adKPw9ce3un8EyQAlUcWO67t8JOAseAHNt3PN6vRUB4E0+d54Awj+ZkpgJcPCOzERoTzoGho6OouH0O0RXsAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T22:20:27.458452Z","bundle_sha256":"38c5d68e2add28e63ed1ddb6bd379e9f4728086c72a2a07d1dcb7ff8f82e38f2"}}