{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:2NACTNQ26XLREZUBJBE3FLYC64","short_pith_number":"pith:2NACTNQ2","canonical_record":{"source":{"id":"1811.10679","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-11-26T20:43:37Z","cross_cats_sorted":[],"title_canon_sha256":"cbf559ff74c2c3481d71bfe52e3cc20829339878275fef50ac435a8fb42968e2","abstract_canon_sha256":"f124f6cb1985ce423698bae263a285d89afad670838c00a2a7eb35021fe1a45a"},"schema_version":"1.0"},"canonical_sha256":"d34029b61af5d71266814849b2af02f72e05b4cbe11ed6b98636508237aefac2","source":{"kind":"arxiv","id":"1811.10679","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.10679","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1811.10679v1","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.10679","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"2NACTNQ26XLR","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2NACTNQ26XLREZUB","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2NACTNQ2","created_at":"2026-05-18T12:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:2NACTNQ26XLREZUBJBE3FLYC64","target":"record","payload":{"canonical_record":{"source":{"id":"1811.10679","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-11-26T20:43:37Z","cross_cats_sorted":[],"title_canon_sha256":"cbf559ff74c2c3481d71bfe52e3cc20829339878275fef50ac435a8fb42968e2","abstract_canon_sha256":"f124f6cb1985ce423698bae263a285d89afad670838c00a2a7eb35021fe1a45a"},"schema_version":"1.0"},"canonical_sha256":"d34029b61af5d71266814849b2af02f72e05b4cbe11ed6b98636508237aefac2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:58:36.165418Z","signature_b64":"MeeYmZUIBwMo8xpuD/LQYsuufuXeS3aBgVKAJ4VxKhN0NisS6U8Dc4+aRd1FpgNy3TynXH5g4x/4w5ef/ynACw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d34029b61af5d71266814849b2af02f72e05b4cbe11ed6b98636508237aefac2","last_reissued_at":"2026-05-17T23:58:36.164764Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:58:36.164764Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.10679","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":"2026-05-17T23:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OD1gzLF6rjgJU5wEXB5GGL18TMffXE61HthFiPACTvLpKRmulGVbBw31dTO1J6Tx6LxNeVgPQq+C9mE1rSFMBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:57:46.797201Z"},"content_sha256":"97166e230e9ad0fd3b4a82fc18d1f6f4124c213599b9afa4a728621e2c3e49d7","schema_version":"1.0","event_id":"sha256:97166e230e9ad0fd3b4a82fc18d1f6f4124c213599b9afa4a728621e2c3e49d7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:2NACTNQ26XLREZUBJBE3FLYC64","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"GHRS Observations of Cool, Low-Gravity Stars. VI Mass-Loss Rates and Wind Parameters for M Giants","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Gioia Rau, Kenneth G. Carpenter, Krister E. Nielsen, Vladimir Airapetian","submitted_at":"2018-11-26T20:43:37Z","abstract_excerpt":"The photon-scattering winds of M-giants absorb parts of the chromospheric emission lines and produce self-reversed spectral features in high resolution {\\it HST}/GHRS spectra. These spectra provide an opportunity to assess fundamental parameters of the wind, including flow and turbulent velocities, the optical depth of the wind above the region of photon creation, and the star's mass-loss rate. This paper is the last paper in the series `GHRS Observations of Cool, Low-Gravity Stars'; the last several have compared empirical measurements of spectral emission lines with models of the winds and m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.10679","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":"2026-05-17T23:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s7I5UmNbWjGNF89gywgO1vWWT6MNalv9tNg+QOHRsQ19ltfOihxAwDPU2r76rd+0t9G9ezfkxLcQc0gBJRlaCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:57:46.797903Z"},"content_sha256":"682febf8c614466fc3edce3299fb031244a75521273eb6c6342b7aba1bd020b3","schema_version":"1.0","event_id":"sha256:682febf8c614466fc3edce3299fb031244a75521273eb6c6342b7aba1bd020b3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2NACTNQ26XLREZUBJBE3FLYC64/bundle.json","state_url":"https://pith.science/pith/2NACTNQ26XLREZUBJBE3FLYC64/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2NACTNQ26XLREZUBJBE3FLYC64/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":"2026-05-26T21:57:46Z","links":{"resolver":"https://pith.science/pith/2NACTNQ26XLREZUBJBE3FLYC64","bundle":"https://pith.science/pith/2NACTNQ26XLREZUBJBE3FLYC64/bundle.json","state":"https://pith.science/pith/2NACTNQ26XLREZUBJBE3FLYC64/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2NACTNQ26XLREZUBJBE3FLYC64/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:2NACTNQ26XLREZUBJBE3FLYC64","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":"f124f6cb1985ce423698bae263a285d89afad670838c00a2a7eb35021fe1a45a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-11-26T20:43:37Z","title_canon_sha256":"cbf559ff74c2c3481d71bfe52e3cc20829339878275fef50ac435a8fb42968e2"},"schema_version":"1.0","source":{"id":"1811.10679","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.10679","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1811.10679v1","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.10679","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"2NACTNQ26XLR","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2NACTNQ26XLREZUB","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2NACTNQ2","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:682febf8c614466fc3edce3299fb031244a75521273eb6c6342b7aba1bd020b3","target":"graph","created_at":"2026-05-17T23:58:36Z","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 photon-scattering winds of M-giants absorb parts of the chromospheric emission lines and produce self-reversed spectral features in high resolution {\\it HST}/GHRS spectra. These spectra provide an opportunity to assess fundamental parameters of the wind, including flow and turbulent velocities, the optical depth of the wind above the region of photon creation, and the star's mass-loss rate. This paper is the last paper in the series `GHRS Observations of Cool, Low-Gravity Stars'; the last several have compared empirical measurements of spectral emission lines with models of the winds and m","authors_text":"Gioia Rau, Kenneth G. Carpenter, Krister E. Nielsen, Vladimir Airapetian","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-11-26T20:43:37Z","title":"GHRS Observations of Cool, Low-Gravity Stars. VI Mass-Loss Rates and Wind Parameters for M Giants"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.10679","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":"sha256:97166e230e9ad0fd3b4a82fc18d1f6f4124c213599b9afa4a728621e2c3e49d7","target":"record","created_at":"2026-05-17T23:58:36Z","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":"f124f6cb1985ce423698bae263a285d89afad670838c00a2a7eb35021fe1a45a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-11-26T20:43:37Z","title_canon_sha256":"cbf559ff74c2c3481d71bfe52e3cc20829339878275fef50ac435a8fb42968e2"},"schema_version":"1.0","source":{"id":"1811.10679","kind":"arxiv","version":1}},"canonical_sha256":"d34029b61af5d71266814849b2af02f72e05b4cbe11ed6b98636508237aefac2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d34029b61af5d71266814849b2af02f72e05b4cbe11ed6b98636508237aefac2","first_computed_at":"2026-05-17T23:58:36.164764Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:36.164764Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MeeYmZUIBwMo8xpuD/LQYsuufuXeS3aBgVKAJ4VxKhN0NisS6U8Dc4+aRd1FpgNy3TynXH5g4x/4w5ef/ynACw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:36.165418Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.10679","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:97166e230e9ad0fd3b4a82fc18d1f6f4124c213599b9afa4a728621e2c3e49d7","sha256:682febf8c614466fc3edce3299fb031244a75521273eb6c6342b7aba1bd020b3"],"state_sha256":"bf7c0b5936f206641793562380994421a54a4bd63e01fe32f720cedee8dc1f66"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tRB9/V1khgLWzzBUNPdfL9n3IqM9ouaRvS+S8E6TJSqH3ZansXswAJhKT9WduE6K9TscvkKY8Tl95QNG6lAmDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T21:57:46.801525Z","bundle_sha256":"8bf897003442c0b0f4a706fb49f08977bddba575a53c5f299675c8d96c7e073a"}}