{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:REZGNUELPARLUXWWPCYB4VCOM2","short_pith_number":"pith:REZGNUEL","canonical_record":{"source":{"id":"2608.06247","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-08-06T16:38:36Z","cross_cats_sorted":[],"title_canon_sha256":"814a1372b59dfcea965729a80f0fa4bc77a4c9fa7145ca194ce89c6523658d42","abstract_canon_sha256":"45d7efef12cb0ac431bd6c734ae48a596379dcdbf8788ec90586406639920a81"},"schema_version":"1.0"},"canonical_sha256":"893266d08b7822ba5ed678b01e544e668dc02639f9c03a39639c695a8110a424","source":{"kind":"arxiv","id":"2608.06247","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.06247","created_at":"2026-08-07T01:41:03Z"},{"alias_kind":"arxiv_version","alias_value":"2608.06247v1","created_at":"2026-08-07T01:41:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.06247","created_at":"2026-08-07T01:41:03Z"},{"alias_kind":"pith_short_12","alias_value":"REZGNUELPARL","created_at":"2026-08-07T01:41:03Z"},{"alias_kind":"pith_short_16","alias_value":"REZGNUELPARLUXWW","created_at":"2026-08-07T01:41:03Z"},{"alias_kind":"pith_short_8","alias_value":"REZGNUEL","created_at":"2026-08-07T01:41:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:REZGNUELPARLUXWWPCYB4VCOM2","target":"record","payload":{"canonical_record":{"source":{"id":"2608.06247","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-08-06T16:38:36Z","cross_cats_sorted":[],"title_canon_sha256":"814a1372b59dfcea965729a80f0fa4bc77a4c9fa7145ca194ce89c6523658d42","abstract_canon_sha256":"45d7efef12cb0ac431bd6c734ae48a596379dcdbf8788ec90586406639920a81"},"schema_version":"1.0"},"canonical_sha256":"893266d08b7822ba5ed678b01e544e668dc02639f9c03a39639c695a8110a424","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-07T01:41:03.196907Z","signature_b64":"2wPSyeVVaUBSnRq4edZGlnnrpyTEwwsJ2+WEcLxTgGZLw5OoxiAXikFF37b1bTKuiXTe41pJy7qC8yP1V/bBCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"893266d08b7822ba5ed678b01e544e668dc02639f9c03a39639c695a8110a424","last_reissued_at":"2026-08-07T01:41:03.194080Z","signature_status":"signed_v1","first_computed_at":"2026-08-07T01:41:03.194080Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.06247","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":"2026-08-07T01:41:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RSBPzrCvHR9bYHeppk8v4nmm9Gr5sPRjNIXYcm8tPRp1eky22DWlUDcmHZBiTU5fpKJ7VPQzAwxix3LcDCKaDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T01:01:36.389153Z"},"content_sha256":"cf5dd4e816837731562a5047c0b0bed59f5373b017d793922a355e7212594a44","schema_version":"1.0","event_id":"sha256:cf5dd4e816837731562a5047c0b0bed59f5373b017d793922a355e7212594a44"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:REZGNUELPARLUXWWPCYB4VCOM2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reanalyzing Megamasers: a low value of $H_0$ from a local probe changes our view of the Hubble Tension","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Hume A. Feldman, Richard Watkins","submitted_at":"2026-08-06T16:38:36Z","abstract_excerpt":"Megamaser distances can be measured without using the traditional distance ladder. As such, they provide an independent probe of the local expansion rate, quantified by the Hubble constant $H_0$. We re-analyze megamaser distance and redshift data to obtain a new, more accurate, estimate of $H_0$. The main improvement in our analysis is the use of a new velocity field reconstruction to correct redshifts for peculiar velocities. This reconstruction utilizes constrained cosmological simulations in addition to redshift survey data to more accurately capture both coherent flows as well as nonGaussi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.06247","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2608.06247/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-08-07T01:41:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LYH5UVVnAF/rr39zX9aBFuFq5CdCR/5arKSEX4hyNRY0JI5svl70BsQ6MZm0ZePQ0kZSVKExieefVP+Bq1ZmCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T01:01:36.389637Z"},"content_sha256":"a5050903998f31de09c40f7ad08dcd552ada8d99b99432a412d2efdf13782d4d","schema_version":"1.0","event_id":"sha256:a5050903998f31de09c40f7ad08dcd552ada8d99b99432a412d2efdf13782d4d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/REZGNUELPARLUXWWPCYB4VCOM2/bundle.json","state_url":"https://pith.science/pith/REZGNUELPARLUXWWPCYB4VCOM2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/REZGNUELPARLUXWWPCYB4VCOM2/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":"2026-08-08T01:01:36Z","links":{"resolver":"https://pith.science/pith/REZGNUELPARLUXWWPCYB4VCOM2","bundle":"https://pith.science/pith/REZGNUELPARLUXWWPCYB4VCOM2/bundle.json","state":"https://pith.science/pith/REZGNUELPARLUXWWPCYB4VCOM2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/REZGNUELPARLUXWWPCYB4VCOM2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:REZGNUELPARLUXWWPCYB4VCOM2","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":"45d7efef12cb0ac431bd6c734ae48a596379dcdbf8788ec90586406639920a81","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-08-06T16:38:36Z","title_canon_sha256":"814a1372b59dfcea965729a80f0fa4bc77a4c9fa7145ca194ce89c6523658d42"},"schema_version":"1.0","source":{"id":"2608.06247","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.06247","created_at":"2026-08-07T01:41:03Z"},{"alias_kind":"arxiv_version","alias_value":"2608.06247v1","created_at":"2026-08-07T01:41:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.06247","created_at":"2026-08-07T01:41:03Z"},{"alias_kind":"pith_short_12","alias_value":"REZGNUELPARL","created_at":"2026-08-07T01:41:03Z"},{"alias_kind":"pith_short_16","alias_value":"REZGNUELPARLUXWW","created_at":"2026-08-07T01:41:03Z"},{"alias_kind":"pith_short_8","alias_value":"REZGNUEL","created_at":"2026-08-07T01:41:03Z"}],"graph_snapshots":[{"event_id":"sha256:a5050903998f31de09c40f7ad08dcd552ada8d99b99432a412d2efdf13782d4d","target":"graph","created_at":"2026-08-07T01:41:03Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2608.06247/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Megamaser distances can be measured without using the traditional distance ladder. As such, they provide an independent probe of the local expansion rate, quantified by the Hubble constant $H_0$. We re-analyze megamaser distance and redshift data to obtain a new, more accurate, estimate of $H_0$. The main improvement in our analysis is the use of a new velocity field reconstruction to correct redshifts for peculiar velocities. This reconstruction utilizes constrained cosmological simulations in addition to redshift survey data to more accurately capture both coherent flows as well as nonGaussi","authors_text":"Hume A. Feldman, Richard Watkins","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-08-06T16:38:36Z","title":"Reanalyzing Megamasers: a low value of $H_0$ from a local probe changes our view of the Hubble Tension"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.06247","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:cf5dd4e816837731562a5047c0b0bed59f5373b017d793922a355e7212594a44","target":"record","created_at":"2026-08-07T01:41:03Z","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":"45d7efef12cb0ac431bd6c734ae48a596379dcdbf8788ec90586406639920a81","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-08-06T16:38:36Z","title_canon_sha256":"814a1372b59dfcea965729a80f0fa4bc77a4c9fa7145ca194ce89c6523658d42"},"schema_version":"1.0","source":{"id":"2608.06247","kind":"arxiv","version":1}},"canonical_sha256":"893266d08b7822ba5ed678b01e544e668dc02639f9c03a39639c695a8110a424","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"893266d08b7822ba5ed678b01e544e668dc02639f9c03a39639c695a8110a424","first_computed_at":"2026-08-07T01:41:03.194080Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-07T01:41:03.194080Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2wPSyeVVaUBSnRq4edZGlnnrpyTEwwsJ2+WEcLxTgGZLw5OoxiAXikFF37b1bTKuiXTe41pJy7qC8yP1V/bBCg==","signature_status":"signed_v1","signed_at":"2026-08-07T01:41:03.196907Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.06247","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf5dd4e816837731562a5047c0b0bed59f5373b017d793922a355e7212594a44","sha256:a5050903998f31de09c40f7ad08dcd552ada8d99b99432a412d2efdf13782d4d"],"state_sha256":"89dedc0df3b5c4c7e96ac8e0702f12df455ea287f3c652b1fb818406248b09d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pEcF1v6I80zTxMI0Bg2C97U7yLvEDIFsmQaRRR6on+Ac4wvHtWjUNEQIROvjkABjXPHx5pYe9dDzxkT7ElSNDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T01:01:36.393724Z","bundle_sha256":"1e74d51f293db72546cc4221a34763ac78c486f9b8660e0bb3dadb28e4d969f7"}}