{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:MUJBC5KIWRRRXSKABXYIV53X7F","short_pith_number":"pith:MUJBC5KI","canonical_record":{"source":{"id":"1603.05485","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-17T13:50:54Z","cross_cats_sorted":[],"title_canon_sha256":"2750c7ff92a9de3f030878164d06afa05e1f16000aed5efab4b721ffebed65ec","abstract_canon_sha256":"d5f2492b0a30688baf9523780d943ab4bdc610fb80a72b8ba684373f51ae5b33"},"schema_version":"1.0"},"canonical_sha256":"6512117548b4631bc9400df08af777f969351f78ca82547b6ee139cb0738318f","source":{"kind":"arxiv","id":"1603.05485","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.05485","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"arxiv_version","alias_value":"1603.05485v1","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.05485","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"pith_short_12","alias_value":"MUJBC5KIWRRR","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MUJBC5KIWRRRXSKA","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MUJBC5KI","created_at":"2026-05-18T12:30:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:MUJBC5KIWRRRXSKABXYIV53X7F","target":"record","payload":{"canonical_record":{"source":{"id":"1603.05485","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-17T13:50:54Z","cross_cats_sorted":[],"title_canon_sha256":"2750c7ff92a9de3f030878164d06afa05e1f16000aed5efab4b721ffebed65ec","abstract_canon_sha256":"d5f2492b0a30688baf9523780d943ab4bdc610fb80a72b8ba684373f51ae5b33"},"schema_version":"1.0"},"canonical_sha256":"6512117548b4631bc9400df08af777f969351f78ca82547b6ee139cb0738318f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:31.362345Z","signature_b64":"gJuux0wuwOXMmz+C0Hr0A1okS7bhSx2vMbsSGmy2LKKuEDEUif6TkMJklqt4AQLi+2dC/cHfGtRwc44Z/3TtAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6512117548b4631bc9400df08af777f969351f78ca82547b6ee139cb0738318f","last_reissued_at":"2026-05-18T01:11:31.361971Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:31.361971Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.05485","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":"2026-05-18T01:11:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x234Gk24LFzolcBEBmXmu0JP1JdaB6YXw5l62UqIoKW2AfRA+4lNGcfUiYfW1Sr1sUPuAsoxRRUW0LZ6rQuPBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T04:19:28.469273Z"},"content_sha256":"1882c0424a12aa0ebdf933750a63e7b966369c49d28cb7e839e61813868fd6b5","schema_version":"1.0","event_id":"sha256:1882c0424a12aa0ebdf933750a63e7b966369c49d28cb7e839e61813868fd6b5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:MUJBC5KIWRRRXSKABXYIV53X7F","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The disc origin of the Milky Way bulge","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"P. Di Matteo","submitted_at":"2016-03-17T13:50:54Z","abstract_excerpt":"The Galactic bulge, that is the prominent out-of-plane over-density present in the inner few kiloparsecs of the Galaxy, is a complex structure, as the morphology, kinematics, chemistry and ages of its stars indicate. To understand the nature of its main components -- those at [Fe/H] >~ -1 dex -- it is necessary to make an inventory of the stellar populations of the Galactic disc(s), and of their borders : the chemistry of the disc at the solar vicinity, well known from detailed studies of stars over many years, is not representative of the whole disc. This finding, together with the recent rev"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.05485","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":"2026-05-18T01:11:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5U1gn8X9UKhZJmHesJGdvwrcezmbq6D6NoVQNvKWDvtuZ9Clfn/gFx+73GmbayVw/39F8OfMQck4o5btWrRkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T04:19:28.469970Z"},"content_sha256":"dd82b3ab49cd9c2f34ead2b847300d9ad4b6ec44fd0576c9e974142451581f1a","schema_version":"1.0","event_id":"sha256:dd82b3ab49cd9c2f34ead2b847300d9ad4b6ec44fd0576c9e974142451581f1a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MUJBC5KIWRRRXSKABXYIV53X7F/bundle.json","state_url":"https://pith.science/pith/MUJBC5KIWRRRXSKABXYIV53X7F/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MUJBC5KIWRRRXSKABXYIV53X7F/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":"2026-05-19T04:19:28Z","links":{"resolver":"https://pith.science/pith/MUJBC5KIWRRRXSKABXYIV53X7F","bundle":"https://pith.science/pith/MUJBC5KIWRRRXSKABXYIV53X7F/bundle.json","state":"https://pith.science/pith/MUJBC5KIWRRRXSKABXYIV53X7F/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MUJBC5KIWRRRXSKABXYIV53X7F/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:MUJBC5KIWRRRXSKABXYIV53X7F","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":"d5f2492b0a30688baf9523780d943ab4bdc610fb80a72b8ba684373f51ae5b33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-17T13:50:54Z","title_canon_sha256":"2750c7ff92a9de3f030878164d06afa05e1f16000aed5efab4b721ffebed65ec"},"schema_version":"1.0","source":{"id":"1603.05485","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.05485","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"arxiv_version","alias_value":"1603.05485v1","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.05485","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"pith_short_12","alias_value":"MUJBC5KIWRRR","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MUJBC5KIWRRRXSKA","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MUJBC5KI","created_at":"2026-05-18T12:30:32Z"}],"graph_snapshots":[{"event_id":"sha256:dd82b3ab49cd9c2f34ead2b847300d9ad4b6ec44fd0576c9e974142451581f1a","target":"graph","created_at":"2026-05-18T01:11:31Z","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 Galactic bulge, that is the prominent out-of-plane over-density present in the inner few kiloparsecs of the Galaxy, is a complex structure, as the morphology, kinematics, chemistry and ages of its stars indicate. To understand the nature of its main components -- those at [Fe/H] >~ -1 dex -- it is necessary to make an inventory of the stellar populations of the Galactic disc(s), and of their borders : the chemistry of the disc at the solar vicinity, well known from detailed studies of stars over many years, is not representative of the whole disc. This finding, together with the recent rev","authors_text":"P. Di Matteo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-17T13:50:54Z","title":"The disc origin of the Milky Way bulge"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.05485","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":"sha256:1882c0424a12aa0ebdf933750a63e7b966369c49d28cb7e839e61813868fd6b5","target":"record","created_at":"2026-05-18T01:11:31Z","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":"d5f2492b0a30688baf9523780d943ab4bdc610fb80a72b8ba684373f51ae5b33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-17T13:50:54Z","title_canon_sha256":"2750c7ff92a9de3f030878164d06afa05e1f16000aed5efab4b721ffebed65ec"},"schema_version":"1.0","source":{"id":"1603.05485","kind":"arxiv","version":1}},"canonical_sha256":"6512117548b4631bc9400df08af777f969351f78ca82547b6ee139cb0738318f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6512117548b4631bc9400df08af777f969351f78ca82547b6ee139cb0738318f","first_computed_at":"2026-05-18T01:11:31.361971Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:31.361971Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gJuux0wuwOXMmz+C0Hr0A1okS7bhSx2vMbsSGmy2LKKuEDEUif6TkMJklqt4AQLi+2dC/cHfGtRwc44Z/3TtAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:31.362345Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.05485","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1882c0424a12aa0ebdf933750a63e7b966369c49d28cb7e839e61813868fd6b5","sha256:dd82b3ab49cd9c2f34ead2b847300d9ad4b6ec44fd0576c9e974142451581f1a"],"state_sha256":"7ec1182b04269f34aed9635dcde6d43b56e1ebeed64f10fa62da6617bc038df5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+u7JpgEdLAWPTWsNj+PtoVsiox1+4XZztTv85118i2Rjp0HECYcaIHBG684k8+In5SqWCpxmg7HZnyja8lN2AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T04:19:28.472009Z","bundle_sha256":"04b48ddf75e60ba1dc8716eb2aa22690908cea31eac7839dbf0494f924e35129"}}