{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:C3IITGA4CIF6ARVYVECQLI5XCK","short_pith_number":"pith:C3IITGA4","canonical_record":{"source":{"id":"1611.04540","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-14T19:36:34Z","cross_cats_sorted":[],"title_canon_sha256":"351e5953fbf98e0e5a283be6bc7cf5d41831e980ead8f7cccb9b4101c17c2867","abstract_canon_sha256":"24078d0ce2d3585d40483d492bffeb23b57c48d8c2a0bcde4807044ff0a3a27b"},"schema_version":"1.0"},"canonical_sha256":"16d089981c120be046b8a90505a3b71294f9e150a1d9a99acc553d34490fdf9c","source":{"kind":"arxiv","id":"1611.04540","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.04540","created_at":"2026-05-18T00:52:49Z"},{"alias_kind":"arxiv_version","alias_value":"1611.04540v2","created_at":"2026-05-18T00:52:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.04540","created_at":"2026-05-18T00:52:49Z"},{"alias_kind":"pith_short_12","alias_value":"C3IITGA4CIF6","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"C3IITGA4CIF6ARVY","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"C3IITGA4","created_at":"2026-05-18T12:30:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:C3IITGA4CIF6ARVYVECQLI5XCK","target":"record","payload":{"canonical_record":{"source":{"id":"1611.04540","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-14T19:36:34Z","cross_cats_sorted":[],"title_canon_sha256":"351e5953fbf98e0e5a283be6bc7cf5d41831e980ead8f7cccb9b4101c17c2867","abstract_canon_sha256":"24078d0ce2d3585d40483d492bffeb23b57c48d8c2a0bcde4807044ff0a3a27b"},"schema_version":"1.0"},"canonical_sha256":"16d089981c120be046b8a90505a3b71294f9e150a1d9a99acc553d34490fdf9c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:52:49.373642Z","signature_b64":"f+Kw63Yez95uRwJsPkX/GboAvu1hy510udBoztvzLj/fS6DWjVxQKrzdrADgiGL7W1O5cJtkjAilaNEDj6AJCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16d089981c120be046b8a90505a3b71294f9e150a1d9a99acc553d34490fdf9c","last_reissued_at":"2026-05-18T00:52:49.373017Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:52:49.373017Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.04540","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":"2026-05-18T00:52:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d0umS5g7KGrQJqQFmvUS2FMmyiiblo5Vb6v+8nNtCHyCFIbSvg9q0bLvzzY5DDmAlDwCMLbPXP04D7tvXpt+DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:40:37.922303Z"},"content_sha256":"ba8c4a85ed4e661e3bbe1aae225493c0e6f6f89ec00974543191df9a43264f85","schema_version":"1.0","event_id":"sha256:ba8c4a85ed4e661e3bbe1aae225493c0e6f6f89ec00974543191df9a43264f85"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:C3IITGA4CIF6ARVYVECQLI5XCK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Mount Wilson Observatory S-index of the Sun","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Alexei A. Pevtsov, Jeffrey C. Hall, Luca Bertello, Ricky Egeland, Sallie Baliunas, Willie Soon","submitted_at":"2016-11-14T19:36:34Z","abstract_excerpt":"The most commonly used index of stellar magnetic activity is the instrumental flux scale of singly-ionized calcium H & K line core emission, S, developed by the Mount Wilson Observatory (MWO) HK Project, or the derivative index R'_HK. Accurately placing the Sun on the S scale is important for comparing solar activity to that of the Sun-like stars. We present previously unpublished measurements of the reflected sunlight from the Moon using the second-generation MWO HK photometer during solar cycle 23 and determine cycle minimum S_min,23 = 0.1634 +/- 0.0008, amplitude Delta S_23 = 0.0143 +/- 0.0"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.04540","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":"2026-05-18T00:52:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PcZVcyUdyI5VMV3bAiVMEbpCu55Zpm1fAkin9Sfux8FdmD1c8uSpUN+o2qed81ko51nbdOKJEwCBLC5UqklyAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:40:37.923003Z"},"content_sha256":"70814d839f2a63f876c6f804d215e555aec0fdfe1947d5ea77585966b60ab363","schema_version":"1.0","event_id":"sha256:70814d839f2a63f876c6f804d215e555aec0fdfe1947d5ea77585966b60ab363"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C3IITGA4CIF6ARVYVECQLI5XCK/bundle.json","state_url":"https://pith.science/pith/C3IITGA4CIF6ARVYVECQLI5XCK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C3IITGA4CIF6ARVYVECQLI5XCK/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":"2026-05-26T17:40:37Z","links":{"resolver":"https://pith.science/pith/C3IITGA4CIF6ARVYVECQLI5XCK","bundle":"https://pith.science/pith/C3IITGA4CIF6ARVYVECQLI5XCK/bundle.json","state":"https://pith.science/pith/C3IITGA4CIF6ARVYVECQLI5XCK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C3IITGA4CIF6ARVYVECQLI5XCK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:C3IITGA4CIF6ARVYVECQLI5XCK","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":"24078d0ce2d3585d40483d492bffeb23b57c48d8c2a0bcde4807044ff0a3a27b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-14T19:36:34Z","title_canon_sha256":"351e5953fbf98e0e5a283be6bc7cf5d41831e980ead8f7cccb9b4101c17c2867"},"schema_version":"1.0","source":{"id":"1611.04540","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.04540","created_at":"2026-05-18T00:52:49Z"},{"alias_kind":"arxiv_version","alias_value":"1611.04540v2","created_at":"2026-05-18T00:52:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.04540","created_at":"2026-05-18T00:52:49Z"},{"alias_kind":"pith_short_12","alias_value":"C3IITGA4CIF6","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"C3IITGA4CIF6ARVY","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"C3IITGA4","created_at":"2026-05-18T12:30:09Z"}],"graph_snapshots":[{"event_id":"sha256:70814d839f2a63f876c6f804d215e555aec0fdfe1947d5ea77585966b60ab363","target":"graph","created_at":"2026-05-18T00:52:49Z","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 most commonly used index of stellar magnetic activity is the instrumental flux scale of singly-ionized calcium H & K line core emission, S, developed by the Mount Wilson Observatory (MWO) HK Project, or the derivative index R'_HK. Accurately placing the Sun on the S scale is important for comparing solar activity to that of the Sun-like stars. We present previously unpublished measurements of the reflected sunlight from the Moon using the second-generation MWO HK photometer during solar cycle 23 and determine cycle minimum S_min,23 = 0.1634 +/- 0.0008, amplitude Delta S_23 = 0.0143 +/- 0.0","authors_text":"Alexei A. Pevtsov, Jeffrey C. Hall, Luca Bertello, Ricky Egeland, Sallie Baliunas, Willie Soon","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-14T19:36:34Z","title":"The Mount Wilson Observatory S-index of the Sun"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.04540","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:ba8c4a85ed4e661e3bbe1aae225493c0e6f6f89ec00974543191df9a43264f85","target":"record","created_at":"2026-05-18T00:52:49Z","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":"24078d0ce2d3585d40483d492bffeb23b57c48d8c2a0bcde4807044ff0a3a27b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-14T19:36:34Z","title_canon_sha256":"351e5953fbf98e0e5a283be6bc7cf5d41831e980ead8f7cccb9b4101c17c2867"},"schema_version":"1.0","source":{"id":"1611.04540","kind":"arxiv","version":2}},"canonical_sha256":"16d089981c120be046b8a90505a3b71294f9e150a1d9a99acc553d34490fdf9c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16d089981c120be046b8a90505a3b71294f9e150a1d9a99acc553d34490fdf9c","first_computed_at":"2026-05-18T00:52:49.373017Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:52:49.373017Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f+Kw63Yez95uRwJsPkX/GboAvu1hy510udBoztvzLj/fS6DWjVxQKrzdrADgiGL7W1O5cJtkjAilaNEDj6AJCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:52:49.373642Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.04540","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ba8c4a85ed4e661e3bbe1aae225493c0e6f6f89ec00974543191df9a43264f85","sha256:70814d839f2a63f876c6f804d215e555aec0fdfe1947d5ea77585966b60ab363"],"state_sha256":"0634f274ede432b7ccff7f58c098ec44824b2d1ac6cf82fe673e41fcb3d2484d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MsQ4UZfk8jYRUKkkOhzykxBJ2Zm79mDtkKih8DvlMC7E2oh9ZsPKGW94WAWail1W4WoxeorHGa1YtDfrPp/sCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T17:40:37.926705Z","bundle_sha256":"95b4bc3cf446aa9c6a692802570e1ffeb4506be0c7976abfe17577243520193e"}}