{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:C3LWNYHVPS2GVSEIOEJDZYOZ6U","short_pith_number":"pith:C3LWNYHV","canonical_record":{"source":{"id":"astro-ph/0701518","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-01-18T00:39:13Z","cross_cats_sorted":[],"title_canon_sha256":"479d119c637974cde13e539164660da0c927b0640c4013766efa2301db4cbeb3","abstract_canon_sha256":"85a43e5751e3140b018a2cde462b822841564fc0522b1ffc2cfbce0b856a1c16"},"schema_version":"1.0"},"canonical_sha256":"16d766e0f57cb46ac88871123ce1d9f5214e3fa431ff91d32908d1e4bdab4ab3","source":{"kind":"arxiv","id":"astro-ph/0701518","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0701518","created_at":"2026-05-18T04:29:07Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0701518v2","created_at":"2026-05-18T04:29:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0701518","created_at":"2026-05-18T04:29:07Z"},{"alias_kind":"pith_short_12","alias_value":"C3LWNYHVPS2G","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"C3LWNYHVPS2GVSEI","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"C3LWNYHV","created_at":"2026-05-18T12:25:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:C3LWNYHVPS2GVSEIOEJDZYOZ6U","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0701518","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-01-18T00:39:13Z","cross_cats_sorted":[],"title_canon_sha256":"479d119c637974cde13e539164660da0c927b0640c4013766efa2301db4cbeb3","abstract_canon_sha256":"85a43e5751e3140b018a2cde462b822841564fc0522b1ffc2cfbce0b856a1c16"},"schema_version":"1.0"},"canonical_sha256":"16d766e0f57cb46ac88871123ce1d9f5214e3fa431ff91d32908d1e4bdab4ab3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:07.125865Z","signature_b64":"HUE6F1jZ9WcFPgc7m0BsQFrSLb/4FdVby80cLevykOVVQQXzcbXcqA5tUkZvIrYNu8aFESu0tlyxq69OqsioAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16d766e0f57cb46ac88871123ce1d9f5214e3fa431ff91d32908d1e4bdab4ab3","last_reissued_at":"2026-05-18T04:29:07.124700Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:07.124700Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0701518","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":"2026-05-18T04:29:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L9/3wWRDpTrTy0cBc/tNumEbFxPWjK3u0bVzmE21VnPHK+CzoJZgswHaqhCnUxK9fRY3jkub4bZ28z/YjODUDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:08:07.559083Z"},"content_sha256":"b7b66b04e158368607d845b3556739e89caace0e29794568ee2a213e28b7e55a","schema_version":"1.0","event_id":"sha256:b7b66b04e158368607d845b3556739e89caace0e29794568ee2a213e28b7e55a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:C3LWNYHVPS2GVSEIOEJDZYOZ6U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tip of the Red Giant Branch Distances. II. Zero-Point Calibration","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Andrew E. Dolphin, Dmitry Makarov, Edward J. Shaya, Lidia Makarova, Luca Rizzi, R. Brent Tully, Shoko Sakai","submitted_at":"2007-01-18T00:39:13Z","abstract_excerpt":"The luminosity of the Tip of the Red Giant Branch (TRGB) provides an excellent measure of galaxy distances and is easily determined in the resolved images of nearby galaxies observed with Hubble Space Telescope. There is now a large amount of archival data relevant to the TRGB methodology and which offers comparisons with other distance estimators. Zero-point issues related to the TRGB distance scale are reviewed in this paper. Consideration is given to the metallicity dependence of the TRGB, the transformations between HST flight systems and Johnson-Cousins photometry, the absolute magnitude "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0701518","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":"2026-05-18T04:29:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b7R/Im9hilg6HFzDBKPTjnq0YfRtxHG1LikYl47zQO/YidA/k7a1nEjKfvOIHTVor7dxaPrGxR8BvCMYVpXzDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:08:07.559745Z"},"content_sha256":"7518f0ec60e9f110260c3a624a8817e1e3e140b09b4c311a3fc41b140adeee15","schema_version":"1.0","event_id":"sha256:7518f0ec60e9f110260c3a624a8817e1e3e140b09b4c311a3fc41b140adeee15"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C3LWNYHVPS2GVSEIOEJDZYOZ6U/bundle.json","state_url":"https://pith.science/pith/C3LWNYHVPS2GVSEIOEJDZYOZ6U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C3LWNYHVPS2GVSEIOEJDZYOZ6U/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":"2026-05-25T22:08:07Z","links":{"resolver":"https://pith.science/pith/C3LWNYHVPS2GVSEIOEJDZYOZ6U","bundle":"https://pith.science/pith/C3LWNYHVPS2GVSEIOEJDZYOZ6U/bundle.json","state":"https://pith.science/pith/C3LWNYHVPS2GVSEIOEJDZYOZ6U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C3LWNYHVPS2GVSEIOEJDZYOZ6U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:C3LWNYHVPS2GVSEIOEJDZYOZ6U","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":"85a43e5751e3140b018a2cde462b822841564fc0522b1ffc2cfbce0b856a1c16","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-01-18T00:39:13Z","title_canon_sha256":"479d119c637974cde13e539164660da0c927b0640c4013766efa2301db4cbeb3"},"schema_version":"1.0","source":{"id":"astro-ph/0701518","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0701518","created_at":"2026-05-18T04:29:07Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0701518v2","created_at":"2026-05-18T04:29:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0701518","created_at":"2026-05-18T04:29:07Z"},{"alias_kind":"pith_short_12","alias_value":"C3LWNYHVPS2G","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"C3LWNYHVPS2GVSEI","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"C3LWNYHV","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:7518f0ec60e9f110260c3a624a8817e1e3e140b09b4c311a3fc41b140adeee15","target":"graph","created_at":"2026-05-18T04:29:07Z","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 luminosity of the Tip of the Red Giant Branch (TRGB) provides an excellent measure of galaxy distances and is easily determined in the resolved images of nearby galaxies observed with Hubble Space Telescope. There is now a large amount of archival data relevant to the TRGB methodology and which offers comparisons with other distance estimators. Zero-point issues related to the TRGB distance scale are reviewed in this paper. Consideration is given to the metallicity dependence of the TRGB, the transformations between HST flight systems and Johnson-Cousins photometry, the absolute magnitude ","authors_text":"Andrew E. Dolphin, Dmitry Makarov, Edward J. Shaya, Lidia Makarova, Luca Rizzi, R. Brent Tully, Shoko Sakai","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-01-18T00:39:13Z","title":"Tip of the Red Giant Branch Distances. II. Zero-Point Calibration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0701518","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:b7b66b04e158368607d845b3556739e89caace0e29794568ee2a213e28b7e55a","target":"record","created_at":"2026-05-18T04:29:07Z","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":"85a43e5751e3140b018a2cde462b822841564fc0522b1ffc2cfbce0b856a1c16","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-01-18T00:39:13Z","title_canon_sha256":"479d119c637974cde13e539164660da0c927b0640c4013766efa2301db4cbeb3"},"schema_version":"1.0","source":{"id":"astro-ph/0701518","kind":"arxiv","version":2}},"canonical_sha256":"16d766e0f57cb46ac88871123ce1d9f5214e3fa431ff91d32908d1e4bdab4ab3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16d766e0f57cb46ac88871123ce1d9f5214e3fa431ff91d32908d1e4bdab4ab3","first_computed_at":"2026-05-18T04:29:07.124700Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:07.124700Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HUE6F1jZ9WcFPgc7m0BsQFrSLb/4FdVby80cLevykOVVQQXzcbXcqA5tUkZvIrYNu8aFESu0tlyxq69OqsioAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:07.125865Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0701518","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7b66b04e158368607d845b3556739e89caace0e29794568ee2a213e28b7e55a","sha256:7518f0ec60e9f110260c3a624a8817e1e3e140b09b4c311a3fc41b140adeee15"],"state_sha256":"343117261d63ca152feda940ae3d9aabb862da979ddded16b4684b36b2784455"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2he63h9J/qg9Tt5YX9CyJOCzaWXMshF/t6uKWSI37CV2xmMOZCVJDhxBHumcO8fYG/4W0hLLrlFqD5+2dcdICA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:08:07.563547Z","bundle_sha256":"f068125d0a20846dd4d627f70dd0f603c942582732576c2fba27ff7db429b96f"}}