{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:GHWMUN57ADK4X7R7DAWHBUZ7HF","short_pith_number":"pith:GHWMUN57","canonical_record":{"source":{"id":"0706.1214","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-08T16:45:09Z","cross_cats_sorted":[],"title_canon_sha256":"cab8f79c11f103074ec784c191aeb3260373ab6a6c255158182d2a63e0db3b0e","abstract_canon_sha256":"244e4d75e7e01a0cb72e4191172142e9ebfcf1633f2b269db8c6c67bf858202f"},"schema_version":"1.0"},"canonical_sha256":"31ecca37bf00d5cbfe3f182c70d33f39506a5758a568ebd53f2350b98f8ee353","source":{"kind":"arxiv","id":"0706.1214","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.1214","created_at":"2026-07-04T15:46:05Z"},{"alias_kind":"arxiv_version","alias_value":"0706.1214v2","created_at":"2026-07-04T15:46:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.1214","created_at":"2026-07-04T15:46:05Z"},{"alias_kind":"pith_short_12","alias_value":"GHWMUN57ADK4","created_at":"2026-07-04T15:46:05Z"},{"alias_kind":"pith_short_16","alias_value":"GHWMUN57ADK4X7R7","created_at":"2026-07-04T15:46:05Z"},{"alias_kind":"pith_short_8","alias_value":"GHWMUN57","created_at":"2026-07-04T15:46:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:GHWMUN57ADK4X7R7DAWHBUZ7HF","target":"record","payload":{"canonical_record":{"source":{"id":"0706.1214","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-08T16:45:09Z","cross_cats_sorted":[],"title_canon_sha256":"cab8f79c11f103074ec784c191aeb3260373ab6a6c255158182d2a63e0db3b0e","abstract_canon_sha256":"244e4d75e7e01a0cb72e4191172142e9ebfcf1633f2b269db8c6c67bf858202f"},"schema_version":"1.0"},"canonical_sha256":"31ecca37bf00d5cbfe3f182c70d33f39506a5758a568ebd53f2350b98f8ee353","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:46:05.276052Z","signature_b64":"mR0dvJ7ewP0ShN/eblzswa5+v4daJiJMiXAjX6XlYv69qrMJdWRWeNVjTZZEv2fpogTVSspWxPthAsvqBgOBAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"31ecca37bf00d5cbfe3f182c70d33f39506a5758a568ebd53f2350b98f8ee353","last_reissued_at":"2026-07-04T15:46:05.275628Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:46:05.275628Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0706.1214","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":"2026-07-04T15:46:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7mITJH/ovxNsgcZCIUfd7OqzhCA2kVJhRdxDzFvvV7gd+ia+QHm8ywNYuJiPgeZcePFYPCCOdoASPDXdUj6QCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T03:32:45.257423Z"},"content_sha256":"e64f058edac52dd6916e2bfada644a727a2c03913a28ee6b8ef2f5a1c167035b","schema_version":"1.0","event_id":"sha256:e64f058edac52dd6916e2bfada644a727a2c03913a28ee6b8ef2f5a1c167035b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:GHWMUN57ADK4X7R7DAWHBUZ7HF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A High-Resolution Survey of Low-Redshift QSO Absorption Lines: Statistics and Physical Conditions of O VI Absorbers","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) STScI, (3) Princeton Univ., (4) Univ. Wisconsin, (5) Univ. Notre Dame, (6) Univ. Potsdam), Blair D. Savage (4), David V. Bowen (3), Edward B. Jenkins (3), Kenneth R. Sembach (2), Nicolas Lehner (5), Philipp Richter (6); ((1) Univ. Massachusetts, Todd M. Tripp (1)","submitted_at":"2007-06-08T16:45:09Z","abstract_excerpt":"Using high-resolution UV spectra of 16 low-z QSOs, we study the physical conditions and statistics of O VI absorption in the IGM at z < 0.5. We identify 51 intervening (z_{abs} << z_{QSO}) O VI systems comprised of 77 individual components, and we find 14 \"proximate\" systems (z_{abs} ~ z_{QSO}) containing 34 components. For intervening systems [components] with rest-frame equivalent width W_{r} > 30 mA, the number of O VI absorbers per unit redshift dN/dz = 15.6(+2.9/-2.4) [21.0(+3.2/-2.8)], and this decreases to dN/dz = 0.9(+1.0/-0.5) [0.3(+0.7/-0.3)] for W_{r} > 300 mA. The number per redshi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.1214","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0706.1214/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":"2026-07-04T15:46:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OztsSo0n9FrxtAwSmbkSXMXvuNsbx6ff9Nv8UhE8FKCY8gZOHhAgjIrsrqIwgnxgUFQGNSskLu+b3zgpkAhRBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T03:32:45.257820Z"},"content_sha256":"e1f33e43f30aefda4d71e970b2902611ff62be710acb39f0c2b0a1ae96b32bf0","schema_version":"1.0","event_id":"sha256:e1f33e43f30aefda4d71e970b2902611ff62be710acb39f0c2b0a1ae96b32bf0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GHWMUN57ADK4X7R7DAWHBUZ7HF/bundle.json","state_url":"https://pith.science/pith/GHWMUN57ADK4X7R7DAWHBUZ7HF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GHWMUN57ADK4X7R7DAWHBUZ7HF/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":"2026-08-07T03:32:45Z","links":{"resolver":"https://pith.science/pith/GHWMUN57ADK4X7R7DAWHBUZ7HF","bundle":"https://pith.science/pith/GHWMUN57ADK4X7R7DAWHBUZ7HF/bundle.json","state":"https://pith.science/pith/GHWMUN57ADK4X7R7DAWHBUZ7HF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GHWMUN57ADK4X7R7DAWHBUZ7HF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:GHWMUN57ADK4X7R7DAWHBUZ7HF","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":"244e4d75e7e01a0cb72e4191172142e9ebfcf1633f2b269db8c6c67bf858202f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-08T16:45:09Z","title_canon_sha256":"cab8f79c11f103074ec784c191aeb3260373ab6a6c255158182d2a63e0db3b0e"},"schema_version":"1.0","source":{"id":"0706.1214","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.1214","created_at":"2026-07-04T15:46:05Z"},{"alias_kind":"arxiv_version","alias_value":"0706.1214v2","created_at":"2026-07-04T15:46:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.1214","created_at":"2026-07-04T15:46:05Z"},{"alias_kind":"pith_short_12","alias_value":"GHWMUN57ADK4","created_at":"2026-07-04T15:46:05Z"},{"alias_kind":"pith_short_16","alias_value":"GHWMUN57ADK4X7R7","created_at":"2026-07-04T15:46:05Z"},{"alias_kind":"pith_short_8","alias_value":"GHWMUN57","created_at":"2026-07-04T15:46:05Z"}],"graph_snapshots":[{"event_id":"sha256:e1f33e43f30aefda4d71e970b2902611ff62be710acb39f0c2b0a1ae96b32bf0","target":"graph","created_at":"2026-07-04T15:46:05Z","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/0706.1214/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Using high-resolution UV spectra of 16 low-z QSOs, we study the physical conditions and statistics of O VI absorption in the IGM at z < 0.5. We identify 51 intervening (z_{abs} << z_{QSO}) O VI systems comprised of 77 individual components, and we find 14 \"proximate\" systems (z_{abs} ~ z_{QSO}) containing 34 components. For intervening systems [components] with rest-frame equivalent width W_{r} > 30 mA, the number of O VI absorbers per unit redshift dN/dz = 15.6(+2.9/-2.4) [21.0(+3.2/-2.8)], and this decreases to dN/dz = 0.9(+1.0/-0.5) [0.3(+0.7/-0.3)] for W_{r} > 300 mA. The number per redshi","authors_text":"(2) STScI, (3) Princeton Univ., (4) Univ. Wisconsin, (5) Univ. Notre Dame, (6) Univ. Potsdam), Blair D. Savage (4), David V. Bowen (3), Edward B. Jenkins (3), Kenneth R. Sembach (2), Nicolas Lehner (5), Philipp Richter (6); ((1) Univ. Massachusetts, Todd M. Tripp (1)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-06-08T16:45:09Z","title":"A High-Resolution Survey of Low-Redshift QSO Absorption Lines: Statistics and Physical Conditions of O VI Absorbers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.1214","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:e64f058edac52dd6916e2bfada644a727a2c03913a28ee6b8ef2f5a1c167035b","target":"record","created_at":"2026-07-04T15:46:05Z","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":"244e4d75e7e01a0cb72e4191172142e9ebfcf1633f2b269db8c6c67bf858202f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-08T16:45:09Z","title_canon_sha256":"cab8f79c11f103074ec784c191aeb3260373ab6a6c255158182d2a63e0db3b0e"},"schema_version":"1.0","source":{"id":"0706.1214","kind":"arxiv","version":2}},"canonical_sha256":"31ecca37bf00d5cbfe3f182c70d33f39506a5758a568ebd53f2350b98f8ee353","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"31ecca37bf00d5cbfe3f182c70d33f39506a5758a568ebd53f2350b98f8ee353","first_computed_at":"2026-07-04T15:46:05.275628Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:46:05.275628Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mR0dvJ7ewP0ShN/eblzswa5+v4daJiJMiXAjX6XlYv69qrMJdWRWeNVjTZZEv2fpogTVSspWxPthAsvqBgOBAg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:46:05.276052Z","signed_message":"canonical_sha256_bytes"},"source_id":"0706.1214","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e64f058edac52dd6916e2bfada644a727a2c03913a28ee6b8ef2f5a1c167035b","sha256:e1f33e43f30aefda4d71e970b2902611ff62be710acb39f0c2b0a1ae96b32bf0"],"state_sha256":"826aa30c0d56ac927e067b743220379aa1812a45698a2632465e7699e4c866b9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1Yh21QfuClOpcbR3gC34cXFudkzHsGcnpxR9ZgqlYBVZPFXFax5DqPMAslRCdNc0Obu39FmStdHL3weAc+stBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T03:32:45.260724Z","bundle_sha256":"cb028e967635eaff75c9bbfcb64578d97ea5f689ff6610d0484487fe10c8c441"}}