{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:O4KAOSJU3YIOOF6METVJUNWB63","short_pith_number":"pith:O4KAOSJU","schema_version":"1.0","canonical_sha256":"7714074934de10e717cc24ea9a36c1f6dd2f7f8b6df0292ee22c4564c5c306b3","source":{"kind":"arxiv","id":"1301.7286","version":1},"attestation_state":"computed","paper":{"title":"Slipher, galaxies, and cosmological velocity fields","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"physics.hist-ph","authors_text":"John A. Peacock","submitted_at":"2013-01-30T16:59:57Z","abstract_excerpt":"By 1917, V.M. Slipher had singlehandedly established a tendency for 'spiral nebulae' to be redshifted (21 out of 25 cases). From a modern perspective, it could seem surprising that the expansion of the universe was not announced at this point. Examination of Slipher's papers shows that he reached a more subtle conclusion: the identification of cosmological peculiar velocities, including the bulk motion of the Milky Way, leading to a beautiful argument in favour of nebulae as distant stellar systems. Nevertheless, Slipher's data actually contain evidence at >8sigma for a positive mean velocity,"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1301.7286","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2013-01-30T16:59:57Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"49268f7c7415cc2ba570331c6ab95961e2bdd60b201b519e3cccb28f90c72900","abstract_canon_sha256":"de05048a2ee498d51ef49a99d8f758b575ef3a66cf6ededbc66805ea808f90dc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:35:00.707798Z","signature_b64":"HhuKGwEjYnuDxsZYV64q1IZN5RpH5fawxTU3LEbA+WQKjelZWcvDSXVroWli1NKr3ij//AXxvPE2P33W4NX1BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7714074934de10e717cc24ea9a36c1f6dd2f7f8b6df0292ee22c4564c5c306b3","last_reissued_at":"2026-05-18T03:35:00.706956Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:35:00.706956Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Slipher, galaxies, and cosmological velocity fields","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"physics.hist-ph","authors_text":"John A. Peacock","submitted_at":"2013-01-30T16:59:57Z","abstract_excerpt":"By 1917, V.M. Slipher had singlehandedly established a tendency for 'spiral nebulae' to be redshifted (21 out of 25 cases). From a modern perspective, it could seem surprising that the expansion of the universe was not announced at this point. Examination of Slipher's papers shows that he reached a more subtle conclusion: the identification of cosmological peculiar velocities, including the bulk motion of the Milky Way, leading to a beautiful argument in favour of nebulae as distant stellar systems. Nevertheless, Slipher's data actually contain evidence at >8sigma for a positive mean velocity,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.7286","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1301.7286","created_at":"2026-05-18T03:35:00.707086+00:00"},{"alias_kind":"arxiv_version","alias_value":"1301.7286v1","created_at":"2026-05-18T03:35:00.707086+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.7286","created_at":"2026-05-18T03:35:00.707086+00:00"},{"alias_kind":"pith_short_12","alias_value":"O4KAOSJU3YIO","created_at":"2026-05-18T12:27:54.935989+00:00"},{"alias_kind":"pith_short_16","alias_value":"O4KAOSJU3YIOOF6M","created_at":"2026-05-18T12:27:54.935989+00:00"},{"alias_kind":"pith_short_8","alias_value":"O4KAOSJU","created_at":"2026-05-18T12:27:54.935989+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/O4KAOSJU3YIOOF6METVJUNWB63","json":"https://pith.science/pith/O4KAOSJU3YIOOF6METVJUNWB63.json","graph_json":"https://pith.science/api/pith-number/O4KAOSJU3YIOOF6METVJUNWB63/graph.json","events_json":"https://pith.science/api/pith-number/O4KAOSJU3YIOOF6METVJUNWB63/events.json","paper":"https://pith.science/paper/O4KAOSJU"},"agent_actions":{"view_html":"https://pith.science/pith/O4KAOSJU3YIOOF6METVJUNWB63","download_json":"https://pith.science/pith/O4KAOSJU3YIOOF6METVJUNWB63.json","view_paper":"https://pith.science/paper/O4KAOSJU","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1301.7286&json=true","fetch_graph":"https://pith.science/api/pith-number/O4KAOSJU3YIOOF6METVJUNWB63/graph.json","fetch_events":"https://pith.science/api/pith-number/O4KAOSJU3YIOOF6METVJUNWB63/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/O4KAOSJU3YIOOF6METVJUNWB63/action/timestamp_anchor","attest_storage":"https://pith.science/pith/O4KAOSJU3YIOOF6METVJUNWB63/action/storage_attestation","attest_author":"https://pith.science/pith/O4KAOSJU3YIOOF6METVJUNWB63/action/author_attestation","sign_citation":"https://pith.science/pith/O4KAOSJU3YIOOF6METVJUNWB63/action/citation_signature","submit_replication":"https://pith.science/pith/O4KAOSJU3YIOOF6METVJUNWB63/action/replication_record"}},"created_at":"2026-05-18T03:35:00.707086+00:00","updated_at":"2026-05-18T03:35:00.707086+00:00"}