{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:TSQUVMBF5NT6IGBTMU5DCMV4Q4","short_pith_number":"pith:TSQUVMBF","canonical_record":{"source":{"id":"1411.3848","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-14T09:57:03Z","cross_cats_sorted":[],"title_canon_sha256":"27b11972838046c633339f9b5d89b10d7bced2d6ba0410d03f25fc3ad9675780","abstract_canon_sha256":"9f0007d591e0c361c525e90c9c76f174b2dccbbfccd5ac6078f8109e23abf280"},"schema_version":"1.0"},"canonical_sha256":"9ca14ab025eb67e41833653a3132bc8733928d847314c8256c9a46fb3cc79ce6","source":{"kind":"arxiv","id":"1411.3848","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.3848","created_at":"2026-05-18T01:35:51Z"},{"alias_kind":"arxiv_version","alias_value":"1411.3848v2","created_at":"2026-05-18T01:35:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.3848","created_at":"2026-05-18T01:35:51Z"},{"alias_kind":"pith_short_12","alias_value":"TSQUVMBF5NT6","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"TSQUVMBF5NT6IGBT","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"TSQUVMBF","created_at":"2026-05-18T12:28:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:TSQUVMBF5NT6IGBTMU5DCMV4Q4","target":"record","payload":{"canonical_record":{"source":{"id":"1411.3848","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-14T09:57:03Z","cross_cats_sorted":[],"title_canon_sha256":"27b11972838046c633339f9b5d89b10d7bced2d6ba0410d03f25fc3ad9675780","abstract_canon_sha256":"9f0007d591e0c361c525e90c9c76f174b2dccbbfccd5ac6078f8109e23abf280"},"schema_version":"1.0"},"canonical_sha256":"9ca14ab025eb67e41833653a3132bc8733928d847314c8256c9a46fb3cc79ce6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:51.564332Z","signature_b64":"H0pFKAUaCjLmMf9LlUNRMzpMq0odxYAbTpaFYaqcCwingZNwj4QZQE+uGnoKq8YYB0QqFd9SWC7hYJOUHjhlCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9ca14ab025eb67e41833653a3132bc8733928d847314c8256c9a46fb3cc79ce6","last_reissued_at":"2026-05-18T01:35:51.563635Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:51.563635Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1411.3848","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":"2026-05-18T01:35:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ycn7Ly5nOM/rZQELDQQVga4qbE+ntyrrebnfYPLSyOg+06IcdayNk9hrywwg/H6u2s0j8BJUMlv1ZTypiQXaCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T17:25:59.639061Z"},"content_sha256":"6854edee917c5b0236819853fd788fc60e6a5f27eaf71e4a8f440fc59ea978d2","schema_version":"1.0","event_id":"sha256:6854edee917c5b0236819853fd788fc60e6a5f27eaf71e4a8f440fc59ea978d2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:TSQUVMBF5NT6IGBTMU5DCMV4Q4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmic history of integrated galactic stellar initial mass function : a simulation study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Asis Kumar Chattopadhyay, Bharat Warlu, Tanuka Chattopadhyay, Tuli De","submitted_at":"2014-11-14T09:57:03Z","abstract_excerpt":"Theoretical and indirect observational evidences suggest that stellar initial mass function (IMF) increases with redshift. On the other hand star formation rates (SFR) may be as high as 100 $M_{\\odot}$ yr$^{-1}$ in star burst galaxies. These may lead to formation of massive clusters hence massive stars to make the integrated galactic stellar initial mass function (IGIMF) top heavy (i.e. proportion of massive stars is higher than less massive stars). We investigate the joint effect of evolving IMF and several measures of SFR in dependence of galaxy wide IMF. The resulting IGIMF have slopes $\\al"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.3848","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":"2026-05-18T01:35:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cSMUhlNwcKjpkPydzfXxB1t3wUQHP1KN6flfwd18UU6Cr/gVCmLgjtdCBqjMqAbQ9V+dYsIVbVM7rMR5FQTwAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T17:25:59.639495Z"},"content_sha256":"57ca9e629f0d282c09f9e39d823206a3a143002fa51e0b0f6a331f9a376c8051","schema_version":"1.0","event_id":"sha256:57ca9e629f0d282c09f9e39d823206a3a143002fa51e0b0f6a331f9a376c8051"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TSQUVMBF5NT6IGBTMU5DCMV4Q4/bundle.json","state_url":"https://pith.science/pith/TSQUVMBF5NT6IGBTMU5DCMV4Q4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TSQUVMBF5NT6IGBTMU5DCMV4Q4/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":"2026-06-02T17:25:59Z","links":{"resolver":"https://pith.science/pith/TSQUVMBF5NT6IGBTMU5DCMV4Q4","bundle":"https://pith.science/pith/TSQUVMBF5NT6IGBTMU5DCMV4Q4/bundle.json","state":"https://pith.science/pith/TSQUVMBF5NT6IGBTMU5DCMV4Q4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TSQUVMBF5NT6IGBTMU5DCMV4Q4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:TSQUVMBF5NT6IGBTMU5DCMV4Q4","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":"9f0007d591e0c361c525e90c9c76f174b2dccbbfccd5ac6078f8109e23abf280","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-14T09:57:03Z","title_canon_sha256":"27b11972838046c633339f9b5d89b10d7bced2d6ba0410d03f25fc3ad9675780"},"schema_version":"1.0","source":{"id":"1411.3848","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.3848","created_at":"2026-05-18T01:35:51Z"},{"alias_kind":"arxiv_version","alias_value":"1411.3848v2","created_at":"2026-05-18T01:35:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.3848","created_at":"2026-05-18T01:35:51Z"},{"alias_kind":"pith_short_12","alias_value":"TSQUVMBF5NT6","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"TSQUVMBF5NT6IGBT","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"TSQUVMBF","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:57ca9e629f0d282c09f9e39d823206a3a143002fa51e0b0f6a331f9a376c8051","target":"graph","created_at":"2026-05-18T01:35:51Z","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":"Theoretical and indirect observational evidences suggest that stellar initial mass function (IMF) increases with redshift. On the other hand star formation rates (SFR) may be as high as 100 $M_{\\odot}$ yr$^{-1}$ in star burst galaxies. These may lead to formation of massive clusters hence massive stars to make the integrated galactic stellar initial mass function (IGIMF) top heavy (i.e. proportion of massive stars is higher than less massive stars). We investigate the joint effect of evolving IMF and several measures of SFR in dependence of galaxy wide IMF. The resulting IGIMF have slopes $\\al","authors_text":"Asis Kumar Chattopadhyay, Bharat Warlu, Tanuka Chattopadhyay, Tuli De","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-14T09:57:03Z","title":"Cosmic history of integrated galactic stellar initial mass function : a simulation study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.3848","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":"sha256:6854edee917c5b0236819853fd788fc60e6a5f27eaf71e4a8f440fc59ea978d2","target":"record","created_at":"2026-05-18T01:35:51Z","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":"9f0007d591e0c361c525e90c9c76f174b2dccbbfccd5ac6078f8109e23abf280","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-14T09:57:03Z","title_canon_sha256":"27b11972838046c633339f9b5d89b10d7bced2d6ba0410d03f25fc3ad9675780"},"schema_version":"1.0","source":{"id":"1411.3848","kind":"arxiv","version":2}},"canonical_sha256":"9ca14ab025eb67e41833653a3132bc8733928d847314c8256c9a46fb3cc79ce6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9ca14ab025eb67e41833653a3132bc8733928d847314c8256c9a46fb3cc79ce6","first_computed_at":"2026-05-18T01:35:51.563635Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:51.563635Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H0pFKAUaCjLmMf9LlUNRMzpMq0odxYAbTpaFYaqcCwingZNwj4QZQE+uGnoKq8YYB0QqFd9SWC7hYJOUHjhlCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:51.564332Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.3848","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6854edee917c5b0236819853fd788fc60e6a5f27eaf71e4a8f440fc59ea978d2","sha256:57ca9e629f0d282c09f9e39d823206a3a143002fa51e0b0f6a331f9a376c8051"],"state_sha256":"41c2ee20c30a76dc2528dacde514a889ccec08f084d62ec2c48ebcf8b1b2d78c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nbtU1vVDmSpAOo5vX9aWmfI+a7t9d51Zn/gyFiJ8Y3irleeRhJ/V2nat09taYWwe229UNajj15X413DYrw7aBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T17:25:59.641354Z","bundle_sha256":"330c0564d22c04bed34ac685ad5b40726b88e4b1f4e5258c997884adf883e410"}}