{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:MRNOK3NITJ6CFXJ7KAEG3JTGUT","short_pith_number":"pith:MRNOK3NI","canonical_record":{"source":{"id":"0905.0695","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-05T20:38:58Z","cross_cats_sorted":[],"title_canon_sha256":"a527b2f70644783f6ae0c0b33b1b261b64033acfea981c8199c64ca934f1dc48","abstract_canon_sha256":"69c96c671f5c10251eaa676c0f5275cf141c3e98f6be77bba8e13da1687f8bdc"},"schema_version":"1.0"},"canonical_sha256":"645ae56da89a7c22dd3f50086da666a4eda1f6cf6d230a1d198c378ad4d62179","source":{"kind":"arxiv","id":"0905.0695","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.0695","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"arxiv_version","alias_value":"0905.0695v1","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.0695","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"pith_short_12","alias_value":"MRNOK3NITJ6C","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MRNOK3NITJ6CFXJ7","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MRNOK3NI","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:MRNOK3NITJ6CFXJ7KAEG3JTGUT","target":"record","payload":{"canonical_record":{"source":{"id":"0905.0695","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-05T20:38:58Z","cross_cats_sorted":[],"title_canon_sha256":"a527b2f70644783f6ae0c0b33b1b261b64033acfea981c8199c64ca934f1dc48","abstract_canon_sha256":"69c96c671f5c10251eaa676c0f5275cf141c3e98f6be77bba8e13da1687f8bdc"},"schema_version":"1.0"},"canonical_sha256":"645ae56da89a7c22dd3f50086da666a4eda1f6cf6d230a1d198c378ad4d62179","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:43.171264Z","signature_b64":"7bgN+b1v2yFsv6irnnQkEGO27lrEGw+Hr0EfvJLlYEnvmSFXJ/XJs3s8lkLFlwMqT+Rbnxq3TizU6lkbFJT+Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"645ae56da89a7c22dd3f50086da666a4eda1f6cf6d230a1d198c378ad4d62179","last_reissued_at":"2026-05-18T04:29:43.170767Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:43.170767Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0905.0695","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":"2026-05-18T04:29:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sMoOmB0fvp3zV02ZbAse5wUqbQNvuXmCJq2LN8dun+RS6RX6Jz3u3nnCgMlac6t0QtleCdV33vP9+FoLhH/tDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T22:35:51.905166Z"},"content_sha256":"6d77044a9f4e265ad6a42e60d4ba74c3fad467ae8cf422602c8eb18fa57cd41c","schema_version":"1.0","event_id":"sha256:6d77044a9f4e265ad6a42e60d4ba74c3fad467ae8cf422602c8eb18fa57cd41c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:MRNOK3NITJ6CFXJ7KAEG3JTGUT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Redetermination of the Hubble Constant with the Hubble Space Telescope from a Differential Distance Ladder","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Adam G. Riess (JHU, Alexei V. Filippenko (UCB), Devdeep Sarkar (UCI), Henry C. Ferguson (STScI), Hubert Lampeitl (UPort), Lucas Macri (Texas A&M), Megan Sosey (STScI), Ryan Chornock (UCB), Saurabh W. Jha (Rutgers), Stefano Casertano (STScI), STScI), Weidong Li (UCB)","submitted_at":"2009-05-05T20:38:58Z","abstract_excerpt":"We report observations of 240 Cepheid variables obtained with the Near Infrared Camera (NICMOS) through the F160W filter on the Hubble Space Telescope (HST). The Cepheids are distributed across six recent hosts of Type Ia supernovae (SNe Ia) and the \"maser galaxy\" NGC 4258, allowing us to directly calibrate the peak luminosities of the SNe Ia from the precise, geometric distance measurements provided by the masers. New features of our measurement include the use of the same instrument for all Cepheid measurements across the distance ladder and homogeneity of the Cepheid periods and metalliciti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.0695","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":"2026-05-18T04:29:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4HXrE+cglDkWUCNqGOwLlGsJf5VTXKkEA1QHd0VxRKfVSMsRRqAdyP02tnsOH9gISis5jLnu9TrcrKCUtsMqBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T22:35:51.905530Z"},"content_sha256":"148a862cff09f77823b02b40bd3c7f244afdb369ce1ed51f350c7cc7c68e36e7","schema_version":"1.0","event_id":"sha256:148a862cff09f77823b02b40bd3c7f244afdb369ce1ed51f350c7cc7c68e36e7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MRNOK3NITJ6CFXJ7KAEG3JTGUT/bundle.json","state_url":"https://pith.science/pith/MRNOK3NITJ6CFXJ7KAEG3JTGUT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MRNOK3NITJ6CFXJ7KAEG3JTGUT/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":"2026-06-01T22:35:51Z","links":{"resolver":"https://pith.science/pith/MRNOK3NITJ6CFXJ7KAEG3JTGUT","bundle":"https://pith.science/pith/MRNOK3NITJ6CFXJ7KAEG3JTGUT/bundle.json","state":"https://pith.science/pith/MRNOK3NITJ6CFXJ7KAEG3JTGUT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MRNOK3NITJ6CFXJ7KAEG3JTGUT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:MRNOK3NITJ6CFXJ7KAEG3JTGUT","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":"69c96c671f5c10251eaa676c0f5275cf141c3e98f6be77bba8e13da1687f8bdc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-05T20:38:58Z","title_canon_sha256":"a527b2f70644783f6ae0c0b33b1b261b64033acfea981c8199c64ca934f1dc48"},"schema_version":"1.0","source":{"id":"0905.0695","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.0695","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"arxiv_version","alias_value":"0905.0695v1","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.0695","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"pith_short_12","alias_value":"MRNOK3NITJ6C","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MRNOK3NITJ6CFXJ7","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MRNOK3NI","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:148a862cff09f77823b02b40bd3c7f244afdb369ce1ed51f350c7cc7c68e36e7","target":"graph","created_at":"2026-05-18T04:29:43Z","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":"We report observations of 240 Cepheid variables obtained with the Near Infrared Camera (NICMOS) through the F160W filter on the Hubble Space Telescope (HST). The Cepheids are distributed across six recent hosts of Type Ia supernovae (SNe Ia) and the \"maser galaxy\" NGC 4258, allowing us to directly calibrate the peak luminosities of the SNe Ia from the precise, geometric distance measurements provided by the masers. New features of our measurement include the use of the same instrument for all Cepheid measurements across the distance ladder and homogeneity of the Cepheid periods and metalliciti","authors_text":"Adam G. Riess (JHU, Alexei V. Filippenko (UCB), Devdeep Sarkar (UCI), Henry C. Ferguson (STScI), Hubert Lampeitl (UPort), Lucas Macri (Texas A&M), Megan Sosey (STScI), Ryan Chornock (UCB), Saurabh W. Jha (Rutgers), Stefano Casertano (STScI), STScI), Weidong Li (UCB)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-05T20:38:58Z","title":"A Redetermination of the Hubble Constant with the Hubble Space Telescope from a Differential Distance Ladder"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.0695","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":"sha256:6d77044a9f4e265ad6a42e60d4ba74c3fad467ae8cf422602c8eb18fa57cd41c","target":"record","created_at":"2026-05-18T04:29:43Z","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":"69c96c671f5c10251eaa676c0f5275cf141c3e98f6be77bba8e13da1687f8bdc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-05T20:38:58Z","title_canon_sha256":"a527b2f70644783f6ae0c0b33b1b261b64033acfea981c8199c64ca934f1dc48"},"schema_version":"1.0","source":{"id":"0905.0695","kind":"arxiv","version":1}},"canonical_sha256":"645ae56da89a7c22dd3f50086da666a4eda1f6cf6d230a1d198c378ad4d62179","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"645ae56da89a7c22dd3f50086da666a4eda1f6cf6d230a1d198c378ad4d62179","first_computed_at":"2026-05-18T04:29:43.170767Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:43.170767Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7bgN+b1v2yFsv6irnnQkEGO27lrEGw+Hr0EfvJLlYEnvmSFXJ/XJs3s8lkLFlwMqT+Rbnxq3TizU6lkbFJT+Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:43.171264Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.0695","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d77044a9f4e265ad6a42e60d4ba74c3fad467ae8cf422602c8eb18fa57cd41c","sha256:148a862cff09f77823b02b40bd3c7f244afdb369ce1ed51f350c7cc7c68e36e7"],"state_sha256":"ddff4432c03bdc5dc1084e9a35564d2c8a91fc7b1cf40e380a48028386e1716e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WEawfBccr9aTVBzG/jiM3r1JQnT1QabEktCcbM0bUccbL9Nabx/HymL4w6cg2OaWjIHNNgWt6Ji+cim/+iJLBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T22:35:51.907775Z","bundle_sha256":"09b761372d6316426ab29eedcad5aba06286b34665e2adcdfa1bdf268b9ea6a7"}}