{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:JD2PIHBN5OAOVWK3CLPEJIRA2J","short_pith_number":"pith:JD2PIHBN","canonical_record":{"source":{"id":"0906.3088","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-06-17T08:48:14Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9604ff14470ba672836a5083eaa51774a2513e5abb30adee1d87ada7a5dd43a1","abstract_canon_sha256":"c0baefebe34327cc5a369679ddf0e93feb9bef44b6c4fe0a7d9c85533eae13a1"},"schema_version":"1.0"},"canonical_sha256":"48f4f41c2deb80ead95b12de44a220d26f69ddda8e1fa8d696d7e097edb1d89c","source":{"kind":"arxiv","id":"0906.3088","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.3088","created_at":"2026-07-04T15:50:23Z"},{"alias_kind":"arxiv_version","alias_value":"0906.3088v2","created_at":"2026-07-04T15:50:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.3088","created_at":"2026-07-04T15:50:23Z"},{"alias_kind":"pith_short_12","alias_value":"JD2PIHBN5OAO","created_at":"2026-07-04T15:50:23Z"},{"alias_kind":"pith_short_16","alias_value":"JD2PIHBN5OAOVWK3","created_at":"2026-07-04T15:50:23Z"},{"alias_kind":"pith_short_8","alias_value":"JD2PIHBN","created_at":"2026-07-04T15:50:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:JD2PIHBN5OAOVWK3CLPEJIRA2J","target":"record","payload":{"canonical_record":{"source":{"id":"0906.3088","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-06-17T08:48:14Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9604ff14470ba672836a5083eaa51774a2513e5abb30adee1d87ada7a5dd43a1","abstract_canon_sha256":"c0baefebe34327cc5a369679ddf0e93feb9bef44b6c4fe0a7d9c85533eae13a1"},"schema_version":"1.0"},"canonical_sha256":"48f4f41c2deb80ead95b12de44a220d26f69ddda8e1fa8d696d7e097edb1d89c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:50:23.269407Z","signature_b64":"yjIhQEqCR6ExspMulyX6Sw3fzyG8TZJ/mnhz6sAb/tvDZABbL2bK1NnLgnwmY5jqvlkE1SHjvwkSGLCjFfkdBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48f4f41c2deb80ead95b12de44a220d26f69ddda8e1fa8d696d7e097edb1d89c","last_reissued_at":"2026-07-04T15:50:23.268988Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:50:23.268988Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.3088","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":"2026-07-04T15:50:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xfOV9UEqhL6wxyksl7+YgUVUiAQW8Tou4RH5lA+BjBOvgxhmvL2GMHmau8PAWRqUkWYjx6+ZW7bSlF7jUQX7Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T10:45:49.852369Z"},"content_sha256":"250b3e11bf941b0e037ba8fca291ff8398c8a9283012214a734ae713279d1a7c","schema_version":"1.0","event_id":"sha256:250b3e11bf941b0e037ba8fca291ff8398c8a9283012214a734ae713279d1a7c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:JD2PIHBN5OAOVWK3CLPEJIRA2J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonlinear radial oscillations of neutron stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"gr-qc","authors_text":"Michael Gabler, Nils Andersson, Ulrich Sperhake","submitted_at":"2009-06-17T08:48:14Z","abstract_excerpt":"The effects of nonlinear oscillations in compact stars are attracting considerable current interest. In order to study such phenomena in the framework of fully nonlinear general relativity, highly accurate numerical studies are required. We present a numerical scheme specifically tailored for studies, based on formulating the time evolution in terms of deviations from a stationary equilibrium configuration. Using this technique, we investigate nonlinear effects associated with radial oscillations of neutron stars for a wide range of amplitudes. In particular, we discuss mode coupling due to no"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.3088","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/0906.3088/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":"2026-07-04T15:50:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eDi0sfdhLh1CaoBgLOnYEA8hizAXOZAGIvz14D077yCWXjfC32XRcmtuwuJF2BWcPpLdnsMV+Sp5cBQJjXYmBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T10:45:49.853168Z"},"content_sha256":"59c488a028f1e82faf0f33feacbde743ee8852de03dea09317466c0da6eddd41","schema_version":"1.0","event_id":"sha256:59c488a028f1e82faf0f33feacbde743ee8852de03dea09317466c0da6eddd41"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JD2PIHBN5OAOVWK3CLPEJIRA2J/bundle.json","state_url":"https://pith.science/pith/JD2PIHBN5OAOVWK3CLPEJIRA2J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JD2PIHBN5OAOVWK3CLPEJIRA2J/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":"2026-08-04T10:45:49Z","links":{"resolver":"https://pith.science/pith/JD2PIHBN5OAOVWK3CLPEJIRA2J","bundle":"https://pith.science/pith/JD2PIHBN5OAOVWK3CLPEJIRA2J/bundle.json","state":"https://pith.science/pith/JD2PIHBN5OAOVWK3CLPEJIRA2J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JD2PIHBN5OAOVWK3CLPEJIRA2J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:JD2PIHBN5OAOVWK3CLPEJIRA2J","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":"c0baefebe34327cc5a369679ddf0e93feb9bef44b6c4fe0a7d9c85533eae13a1","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-06-17T08:48:14Z","title_canon_sha256":"9604ff14470ba672836a5083eaa51774a2513e5abb30adee1d87ada7a5dd43a1"},"schema_version":"1.0","source":{"id":"0906.3088","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.3088","created_at":"2026-07-04T15:50:23Z"},{"alias_kind":"arxiv_version","alias_value":"0906.3088v2","created_at":"2026-07-04T15:50:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.3088","created_at":"2026-07-04T15:50:23Z"},{"alias_kind":"pith_short_12","alias_value":"JD2PIHBN5OAO","created_at":"2026-07-04T15:50:23Z"},{"alias_kind":"pith_short_16","alias_value":"JD2PIHBN5OAOVWK3","created_at":"2026-07-04T15:50:23Z"},{"alias_kind":"pith_short_8","alias_value":"JD2PIHBN","created_at":"2026-07-04T15:50:23Z"}],"graph_snapshots":[{"event_id":"sha256:59c488a028f1e82faf0f33feacbde743ee8852de03dea09317466c0da6eddd41","target":"graph","created_at":"2026-07-04T15:50:23Z","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/0906.3088/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The effects of nonlinear oscillations in compact stars are attracting considerable current interest. In order to study such phenomena in the framework of fully nonlinear general relativity, highly accurate numerical studies are required. We present a numerical scheme specifically tailored for studies, based on formulating the time evolution in terms of deviations from a stationary equilibrium configuration. Using this technique, we investigate nonlinear effects associated with radial oscillations of neutron stars for a wide range of amplitudes. In particular, we discuss mode coupling due to no","authors_text":"Michael Gabler, Nils Andersson, Ulrich Sperhake","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-06-17T08:48:14Z","title":"Nonlinear radial oscillations of neutron stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.3088","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":"sha256:250b3e11bf941b0e037ba8fca291ff8398c8a9283012214a734ae713279d1a7c","target":"record","created_at":"2026-07-04T15:50:23Z","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":"c0baefebe34327cc5a369679ddf0e93feb9bef44b6c4fe0a7d9c85533eae13a1","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-06-17T08:48:14Z","title_canon_sha256":"9604ff14470ba672836a5083eaa51774a2513e5abb30adee1d87ada7a5dd43a1"},"schema_version":"1.0","source":{"id":"0906.3088","kind":"arxiv","version":2}},"canonical_sha256":"48f4f41c2deb80ead95b12de44a220d26f69ddda8e1fa8d696d7e097edb1d89c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48f4f41c2deb80ead95b12de44a220d26f69ddda8e1fa8d696d7e097edb1d89c","first_computed_at":"2026-07-04T15:50:23.268988Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:50:23.268988Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yjIhQEqCR6ExspMulyX6Sw3fzyG8TZJ/mnhz6sAb/tvDZABbL2bK1NnLgnwmY5jqvlkE1SHjvwkSGLCjFfkdBw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:50:23.269407Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.3088","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:250b3e11bf941b0e037ba8fca291ff8398c8a9283012214a734ae713279d1a7c","sha256:59c488a028f1e82faf0f33feacbde743ee8852de03dea09317466c0da6eddd41"],"state_sha256":"f78ce007e809bf1af4597ea854f0a50c4f4aaff9a73f8cb2cfbd0c25c71afa55"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0qz/2BGDymeEtgoDiS7lp7eL9NrK1VPUSMX5XjCysQrBarxq42iNK0jrHFMnJF/5WEZlvxEsdd5CScH5xiaNCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T10:45:49.860439Z","bundle_sha256":"184bddc291bbbeef130ef54a532984f2226c7ccf9f73756872ac9336b08751d3"}}