{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:VP6LCMNVUGH4ZRAZS4R4XZLIQ7","short_pith_number":"pith:VP6LCMNV","canonical_record":{"source":{"id":"1304.7652","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-29T13:09:09Z","cross_cats_sorted":[],"title_canon_sha256":"6e993fd87ca748b6ac5645bfa06150a7b5fe2671a1e75a6715554b57deb1012b","abstract_canon_sha256":"6aada2a3073b62e9cac3776e12419dc8180a25a6f83a7b306c43a32d984b65b4"},"schema_version":"1.0"},"canonical_sha256":"abfcb131b5a18fccc4199723cbe56887dab8a9ab2e951621d364205b75c22d09","source":{"kind":"arxiv","id":"1304.7652","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.7652","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"arxiv_version","alias_value":"1304.7652v1","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.7652","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"pith_short_12","alias_value":"VP6LCMNVUGH4","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"VP6LCMNVUGH4ZRAZ","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"VP6LCMNV","created_at":"2026-05-18T12:28:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:VP6LCMNVUGH4ZRAZS4R4XZLIQ7","target":"record","payload":{"canonical_record":{"source":{"id":"1304.7652","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-29T13:09:09Z","cross_cats_sorted":[],"title_canon_sha256":"6e993fd87ca748b6ac5645bfa06150a7b5fe2671a1e75a6715554b57deb1012b","abstract_canon_sha256":"6aada2a3073b62e9cac3776e12419dc8180a25a6f83a7b306c43a32d984b65b4"},"schema_version":"1.0"},"canonical_sha256":"abfcb131b5a18fccc4199723cbe56887dab8a9ab2e951621d364205b75c22d09","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:26:53.391281Z","signature_b64":"eGceFM/PK2qvHd3kpTqDmm/DI0glSF49HNeb/V8XgmhTzGQSRQGyUW06iYxyuIF8kSdveU/5OB7SoKJabVJBCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"abfcb131b5a18fccc4199723cbe56887dab8a9ab2e951621d364205b75c22d09","last_reissued_at":"2026-05-18T03:26:53.390738Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:26:53.390738Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.7652","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":"2026-05-18T03:26:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B/QewU3Po5T1sJ/SJUnxvPM2AX5Qb9wC9uhVZyric62n0SbWg0zgOZF9UVIjCPkSOfwmF45DLtG7X2BcDtlrAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T19:38:39.244031Z"},"content_sha256":"8fe8244f04fc1ce5b9973f8c478b9fa62a9fa3ef3ee697ecab0c5a2fdcc11414","schema_version":"1.0","event_id":"sha256:8fe8244f04fc1ce5b9973f8c478b9fa62a9fa3ef3ee697ecab0c5a2fdcc11414"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:VP6LCMNVUGH4ZRAZS4R4XZLIQ7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Axion cooling of white dwarfs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"E. Garcia--Berro (Universitat Politecnica Catalunya - IEEC), J. Isern (CSIC-IEEC), M. Salaris (Liverpool John Moores University), S. Catalan (University of Hertfordshire), S. Torres (Universitat Politecnica Catalunya - IEEC)","submitted_at":"2013-04-29T13:09:09Z","abstract_excerpt":"The evolution of white dwarfs is a simple gravothermal process. This process can be tested in two ways, through the luminosity function of these stars and through the secular variation of the period of pulsation of those stars that are variable. Here we show how the mass of the axion can be constrained using the white dwarf luminosity function."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.7652","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":"2026-05-18T03:26:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PdETRv0b02RdKXZZbgyzGnxbUcNvg1UA7mxuDB72tx9H5UwUa/MmRf3QgnvrCfgHiqUor5y92ljguFH9o8dLBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T19:38:39.244416Z"},"content_sha256":"f2d0ee3bd0b707c367c21a77eac6f57bb2714648aa17284ca7f0e949880469e8","schema_version":"1.0","event_id":"sha256:f2d0ee3bd0b707c367c21a77eac6f57bb2714648aa17284ca7f0e949880469e8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VP6LCMNVUGH4ZRAZS4R4XZLIQ7/bundle.json","state_url":"https://pith.science/pith/VP6LCMNVUGH4ZRAZS4R4XZLIQ7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VP6LCMNVUGH4ZRAZS4R4XZLIQ7/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":"2026-06-01T19:38:39Z","links":{"resolver":"https://pith.science/pith/VP6LCMNVUGH4ZRAZS4R4XZLIQ7","bundle":"https://pith.science/pith/VP6LCMNVUGH4ZRAZS4R4XZLIQ7/bundle.json","state":"https://pith.science/pith/VP6LCMNVUGH4ZRAZS4R4XZLIQ7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VP6LCMNVUGH4ZRAZS4R4XZLIQ7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:VP6LCMNVUGH4ZRAZS4R4XZLIQ7","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":"6aada2a3073b62e9cac3776e12419dc8180a25a6f83a7b306c43a32d984b65b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-29T13:09:09Z","title_canon_sha256":"6e993fd87ca748b6ac5645bfa06150a7b5fe2671a1e75a6715554b57deb1012b"},"schema_version":"1.0","source":{"id":"1304.7652","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.7652","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"arxiv_version","alias_value":"1304.7652v1","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.7652","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"pith_short_12","alias_value":"VP6LCMNVUGH4","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"VP6LCMNVUGH4ZRAZ","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"VP6LCMNV","created_at":"2026-05-18T12:28:04Z"}],"graph_snapshots":[{"event_id":"sha256:f2d0ee3bd0b707c367c21a77eac6f57bb2714648aa17284ca7f0e949880469e8","target":"graph","created_at":"2026-05-18T03:26:53Z","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 evolution of white dwarfs is a simple gravothermal process. This process can be tested in two ways, through the luminosity function of these stars and through the secular variation of the period of pulsation of those stars that are variable. Here we show how the mass of the axion can be constrained using the white dwarf luminosity function.","authors_text":"E. Garcia--Berro (Universitat Politecnica Catalunya - IEEC), J. Isern (CSIC-IEEC), M. Salaris (Liverpool John Moores University), S. Catalan (University of Hertfordshire), S. Torres (Universitat Politecnica Catalunya - IEEC)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-29T13:09:09Z","title":"Axion cooling of white dwarfs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.7652","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":"sha256:8fe8244f04fc1ce5b9973f8c478b9fa62a9fa3ef3ee697ecab0c5a2fdcc11414","target":"record","created_at":"2026-05-18T03:26:53Z","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":"6aada2a3073b62e9cac3776e12419dc8180a25a6f83a7b306c43a32d984b65b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-29T13:09:09Z","title_canon_sha256":"6e993fd87ca748b6ac5645bfa06150a7b5fe2671a1e75a6715554b57deb1012b"},"schema_version":"1.0","source":{"id":"1304.7652","kind":"arxiv","version":1}},"canonical_sha256":"abfcb131b5a18fccc4199723cbe56887dab8a9ab2e951621d364205b75c22d09","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"abfcb131b5a18fccc4199723cbe56887dab8a9ab2e951621d364205b75c22d09","first_computed_at":"2026-05-18T03:26:53.390738Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:26:53.390738Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eGceFM/PK2qvHd3kpTqDmm/DI0glSF49HNeb/V8XgmhTzGQSRQGyUW06iYxyuIF8kSdveU/5OB7SoKJabVJBCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:26:53.391281Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.7652","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8fe8244f04fc1ce5b9973f8c478b9fa62a9fa3ef3ee697ecab0c5a2fdcc11414","sha256:f2d0ee3bd0b707c367c21a77eac6f57bb2714648aa17284ca7f0e949880469e8"],"state_sha256":"60fa1c4acb20e79e18fdd8edf08dce1f328186fa864e5271bf79479dc0ee8e9f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cot8PN9E5Y68PXyzTZjqjyU0uqPWWnuRFNDRgIoScaOrW6mDSdkxJTHAJuv/yUCcwwO9G8c0FEzlBs4y0kOtBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T19:38:39.246370Z","bundle_sha256":"dad393b4479e2fd2b2cc5133cdca0f1e7b34b7cadf21e3fae7306b35ab4c402d"}}