{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:YI2PQGF4FRU5SO55XX6QXDVXK4","short_pith_number":"pith:YI2PQGF4","canonical_record":{"source":{"id":"1207.0363","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-02T12:59:18Z","cross_cats_sorted":[],"title_canon_sha256":"7f03b7607cf410767cee7408d6fc72b375aefaf59074c84dc1e9acf6133650ce","abstract_canon_sha256":"11bce0642969d73c6f0be134bd2e32f8cf1357dc739b2c2f03729a8c96b460a1"},"schema_version":"1.0"},"canonical_sha256":"c234f818bc2c69d93bbdbdfd0b8eb75702bd733e2a3ea0bfb87433396a7892b0","source":{"kind":"arxiv","id":"1207.0363","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.0363","created_at":"2026-05-18T01:56:35Z"},{"alias_kind":"arxiv_version","alias_value":"1207.0363v1","created_at":"2026-05-18T01:56:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.0363","created_at":"2026-05-18T01:56:35Z"},{"alias_kind":"pith_short_12","alias_value":"YI2PQGF4FRU5","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"YI2PQGF4FRU5SO55","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"YI2PQGF4","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:YI2PQGF4FRU5SO55XX6QXDVXK4","target":"record","payload":{"canonical_record":{"source":{"id":"1207.0363","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-02T12:59:18Z","cross_cats_sorted":[],"title_canon_sha256":"7f03b7607cf410767cee7408d6fc72b375aefaf59074c84dc1e9acf6133650ce","abstract_canon_sha256":"11bce0642969d73c6f0be134bd2e32f8cf1357dc739b2c2f03729a8c96b460a1"},"schema_version":"1.0"},"canonical_sha256":"c234f818bc2c69d93bbdbdfd0b8eb75702bd733e2a3ea0bfb87433396a7892b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:35.767735Z","signature_b64":"nM00z++ZZYpmn4HJt3+Vfo+ClnQquB2Vf+gT4uU5pH7Vb55rh7NqP6QxJcLFuS6vhNGfEOBK8zHD96+dyaVxCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c234f818bc2c69d93bbdbdfd0b8eb75702bd733e2a3ea0bfb87433396a7892b0","last_reissued_at":"2026-05-18T01:56:35.767285Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:35.767285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.0363","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":"2026-05-18T01:56:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m/OBhShDIT9phM73OOz09SxebKofh3A/FjN3trBKyEEOQhtVV6HP5Nrq+zJ1mHB/BF8qp8IlKJ5X+F8AzcqVDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:59:58.574280Z"},"content_sha256":"18b12d62191d4e7b4fb2f1d02d1d6186d4bb9b17f8ac17e74184b7fd44b86d7c","schema_version":"1.0","event_id":"sha256:18b12d62191d4e7b4fb2f1d02d1d6186d4bb9b17f8ac17e74184b7fd44b86d7c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:YI2PQGF4FRU5SO55XX6QXDVXK4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The properties of the local spiral arms from RAVE data: two-dimensional density wave approach","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Helmi, A. Just, A. Siebert, A. Siviero, B. Burnett, B. Famaey, B. K. Gibson, C. Boeche, C. Faure, E. K. Grebel, G. Seabroke, I. Minchev, J. Binney, J. Bland-Hawthorn, J. F. Navarro, M. E. K. Williams, M. Steinmetz, O. Bienayme, Q. A. Parker, T. Zwitter, U. Munari, W. A. Reid","submitted_at":"2012-07-02T12:59:18Z","abstract_excerpt":"Using the RAVE survey, we recently brought to light a gradient in the mean galactocentric radial velocity of stars in the extended solar neighbourhood. This gradient likely originates from non-axisymmetric perturbations of the potential, among which a perturbation by spiral arms is a possible explanation. Here, we apply the traditional density wave theory and analytically model the radial component of the two-dimensional velocity field. Provided that the radial velocity gradient is caused by relatively long-lived spiral arms that can affect stars substantially above the plane, this analytic mo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.0363","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":"2026-05-18T01:56:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GQAv8CGMFXrKj7HiTwMU9yN7TfOnRutw2fx4bwkGk4ENCucnV8a47KzN+I9+iDh+s6FD1fYd56tJ9zN9nNPvDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:59:58.574638Z"},"content_sha256":"2661b3bd69e0504bee0642a00ff1ce5e1abdb8b41d72bd5a2bfa584cc2e297d5","schema_version":"1.0","event_id":"sha256:2661b3bd69e0504bee0642a00ff1ce5e1abdb8b41d72bd5a2bfa584cc2e297d5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YI2PQGF4FRU5SO55XX6QXDVXK4/bundle.json","state_url":"https://pith.science/pith/YI2PQGF4FRU5SO55XX6QXDVXK4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YI2PQGF4FRU5SO55XX6QXDVXK4/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":"2026-05-28T14:59:58Z","links":{"resolver":"https://pith.science/pith/YI2PQGF4FRU5SO55XX6QXDVXK4","bundle":"https://pith.science/pith/YI2PQGF4FRU5SO55XX6QXDVXK4/bundle.json","state":"https://pith.science/pith/YI2PQGF4FRU5SO55XX6QXDVXK4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YI2PQGF4FRU5SO55XX6QXDVXK4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:YI2PQGF4FRU5SO55XX6QXDVXK4","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":"11bce0642969d73c6f0be134bd2e32f8cf1357dc739b2c2f03729a8c96b460a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-02T12:59:18Z","title_canon_sha256":"7f03b7607cf410767cee7408d6fc72b375aefaf59074c84dc1e9acf6133650ce"},"schema_version":"1.0","source":{"id":"1207.0363","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.0363","created_at":"2026-05-18T01:56:35Z"},{"alias_kind":"arxiv_version","alias_value":"1207.0363v1","created_at":"2026-05-18T01:56:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.0363","created_at":"2026-05-18T01:56:35Z"},{"alias_kind":"pith_short_12","alias_value":"YI2PQGF4FRU5","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"YI2PQGF4FRU5SO55","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"YI2PQGF4","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:2661b3bd69e0504bee0642a00ff1ce5e1abdb8b41d72bd5a2bfa584cc2e297d5","target":"graph","created_at":"2026-05-18T01:56:35Z","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":"Using the RAVE survey, we recently brought to light a gradient in the mean galactocentric radial velocity of stars in the extended solar neighbourhood. This gradient likely originates from non-axisymmetric perturbations of the potential, among which a perturbation by spiral arms is a possible explanation. Here, we apply the traditional density wave theory and analytically model the radial component of the two-dimensional velocity field. Provided that the radial velocity gradient is caused by relatively long-lived spiral arms that can affect stars substantially above the plane, this analytic mo","authors_text":"A. Helmi, A. Just, A. Siebert, A. Siviero, B. Burnett, B. Famaey, B. K. Gibson, C. Boeche, C. Faure, E. K. Grebel, G. Seabroke, I. Minchev, J. Binney, J. Bland-Hawthorn, J. F. Navarro, M. E. K. Williams, M. Steinmetz, O. Bienayme, Q. A. Parker, T. Zwitter, U. Munari, W. A. Reid","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-02T12:59:18Z","title":"The properties of the local spiral arms from RAVE data: two-dimensional density wave approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.0363","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":"sha256:18b12d62191d4e7b4fb2f1d02d1d6186d4bb9b17f8ac17e74184b7fd44b86d7c","target":"record","created_at":"2026-05-18T01:56:35Z","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":"11bce0642969d73c6f0be134bd2e32f8cf1357dc739b2c2f03729a8c96b460a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-02T12:59:18Z","title_canon_sha256":"7f03b7607cf410767cee7408d6fc72b375aefaf59074c84dc1e9acf6133650ce"},"schema_version":"1.0","source":{"id":"1207.0363","kind":"arxiv","version":1}},"canonical_sha256":"c234f818bc2c69d93bbdbdfd0b8eb75702bd733e2a3ea0bfb87433396a7892b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c234f818bc2c69d93bbdbdfd0b8eb75702bd733e2a3ea0bfb87433396a7892b0","first_computed_at":"2026-05-18T01:56:35.767285Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:35.767285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nM00z++ZZYpmn4HJt3+Vfo+ClnQquB2Vf+gT4uU5pH7Vb55rh7NqP6QxJcLFuS6vhNGfEOBK8zHD96+dyaVxCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:35.767735Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.0363","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:18b12d62191d4e7b4fb2f1d02d1d6186d4bb9b17f8ac17e74184b7fd44b86d7c","sha256:2661b3bd69e0504bee0642a00ff1ce5e1abdb8b41d72bd5a2bfa584cc2e297d5"],"state_sha256":"ef03327cec73a8727713a510529a5cf552d3b315c4a644432d5ac45b38120b98"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D6I6fc1IwHmcAruQeQzA1WDYDQ0l1AzW8BZfsfwNImZf5/yoR1jlMzs9F4+VAFW7Ocjt+rkXEDoNbeQY6+JEAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T14:59:58.576544Z","bundle_sha256":"3ab2bdb31cc3f8eef22fa2cecdd9d0ace86d757d4a0402b95db9c3c21fd0b2d6"}}