{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:JYBM6LZ6RUDHDADKAROAS2FC7A","short_pith_number":"pith:JYBM6LZ6","canonical_record":{"source":{"id":"0909.5218","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-28T21:13:34Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"9e18a42b7fb868b6a4b2aff00d066cccee1ea59a32a38c5bdff00a26468b4734","abstract_canon_sha256":"cdb764ac83abecf469fb08c768d2a3b7231529848e15ec7cffdfdd84629e4d4d"},"schema_version":"1.0"},"canonical_sha256":"4e02cf2f3e8d0671806a045c0968a2f80f05c7b3514695442c2e7134927f2aad","source":{"kind":"arxiv","id":"0909.5218","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.5218","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"arxiv_version","alias_value":"0909.5218v1","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.5218","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"pith_short_12","alias_value":"JYBM6LZ6RUDH","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"JYBM6LZ6RUDHDADK","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"JYBM6LZ6","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:JYBM6LZ6RUDHDADKAROAS2FC7A","target":"record","payload":{"canonical_record":{"source":{"id":"0909.5218","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-28T21:13:34Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"9e18a42b7fb868b6a4b2aff00d066cccee1ea59a32a38c5bdff00a26468b4734","abstract_canon_sha256":"cdb764ac83abecf469fb08c768d2a3b7231529848e15ec7cffdfdd84629e4d4d"},"schema_version":"1.0"},"canonical_sha256":"4e02cf2f3e8d0671806a045c0968a2f80f05c7b3514695442c2e7134927f2aad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:36.648459Z","signature_b64":"wiVaFtqe/5S5f4sZkJLljMcsZsIRYfhCSTEWZyVBCnbPzCgU1tiQ8lJLVqv/7uU7RdiZvlwW6MueCnzT3AdfCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4e02cf2f3e8d0671806a045c0968a2f80f05c7b3514695442c2e7134927f2aad","last_reissued_at":"2026-05-18T02:11:36.647663Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:36.647663Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.5218","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":"2026-05-18T02:11:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ufJmHdbjrzaVlYZUBxUoCUs72/o7eJWJ+BQMwHOPvveUTHnMid1uGSFFuL6BZO7JkAMLKnbDAa8wu95uhaBrDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T14:15:28.809162Z"},"content_sha256":"48ebe4d3e27a4627398f86d8976b0d8db898cb52d9b265a9213ab007d3dab12c","schema_version":"1.0","event_id":"sha256:48ebe4d3e27a4627398f86d8976b0d8db898cb52d9b265a9213ab007d3dab12c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:JYBM6LZ6RUDHDADKAROAS2FC7A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraining the Spin-down of the Nearby Isolated Neutron Star RX J0806.4-4123, and Implications for the Population of Nearby Neutron Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"D. L. Kaplan, M. H. van Kerkwijk","submitted_at":"2009-09-28T21:13:34Z","abstract_excerpt":"The nearby isolated neutron stars are a group of seven relatively slowly rotating neutron stars that show thermal X-ray spectra, most with broad absorption features. They are interesting both because they may allow one to determine fundamental neutron-star properties by modeling their spectra, and because they appear to be a large fraction of the overall neutron-star population. Here, we describe a series of XMM-Newton observations of the nearby isolated neutron star RX J0806.4-4123, taken as part of larger program of timing studies. From these, we limit the spin-down rate to dnu/dt=(-4.3+/-2."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.5218","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":"2026-05-18T02:11:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tv6tVdyKMwoxcuCytIe5VTTWWTjgE0vlsIV08g3FfLLc5dLJCRuvlZLgkHiRLWCKxNxMbLgnTsDlManwFvb4Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T14:15:28.809857Z"},"content_sha256":"cb4a6fbabf49b65f81bd399db360bef1378ada64d77b65463256126dc18ed46e","schema_version":"1.0","event_id":"sha256:cb4a6fbabf49b65f81bd399db360bef1378ada64d77b65463256126dc18ed46e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JYBM6LZ6RUDHDADKAROAS2FC7A/bundle.json","state_url":"https://pith.science/pith/JYBM6LZ6RUDHDADKAROAS2FC7A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JYBM6LZ6RUDHDADKAROAS2FC7A/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":"2026-05-30T14:15:28Z","links":{"resolver":"https://pith.science/pith/JYBM6LZ6RUDHDADKAROAS2FC7A","bundle":"https://pith.science/pith/JYBM6LZ6RUDHDADKAROAS2FC7A/bundle.json","state":"https://pith.science/pith/JYBM6LZ6RUDHDADKAROAS2FC7A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JYBM6LZ6RUDHDADKAROAS2FC7A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:JYBM6LZ6RUDHDADKAROAS2FC7A","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":"cdb764ac83abecf469fb08c768d2a3b7231529848e15ec7cffdfdd84629e4d4d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-28T21:13:34Z","title_canon_sha256":"9e18a42b7fb868b6a4b2aff00d066cccee1ea59a32a38c5bdff00a26468b4734"},"schema_version":"1.0","source":{"id":"0909.5218","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.5218","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"arxiv_version","alias_value":"0909.5218v1","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.5218","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"pith_short_12","alias_value":"JYBM6LZ6RUDH","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"JYBM6LZ6RUDHDADK","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"JYBM6LZ6","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:cb4a6fbabf49b65f81bd399db360bef1378ada64d77b65463256126dc18ed46e","target":"graph","created_at":"2026-05-18T02:11:36Z","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 nearby isolated neutron stars are a group of seven relatively slowly rotating neutron stars that show thermal X-ray spectra, most with broad absorption features. They are interesting both because they may allow one to determine fundamental neutron-star properties by modeling their spectra, and because they appear to be a large fraction of the overall neutron-star population. Here, we describe a series of XMM-Newton observations of the nearby isolated neutron star RX J0806.4-4123, taken as part of larger program of timing studies. From these, we limit the spin-down rate to dnu/dt=(-4.3+/-2.","authors_text":"D. L. Kaplan, M. H. van Kerkwijk","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-28T21:13:34Z","title":"Constraining the Spin-down of the Nearby Isolated Neutron Star RX J0806.4-4123, and Implications for the Population of Nearby Neutron Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.5218","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":"sha256:48ebe4d3e27a4627398f86d8976b0d8db898cb52d9b265a9213ab007d3dab12c","target":"record","created_at":"2026-05-18T02:11:36Z","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":"cdb764ac83abecf469fb08c768d2a3b7231529848e15ec7cffdfdd84629e4d4d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-28T21:13:34Z","title_canon_sha256":"9e18a42b7fb868b6a4b2aff00d066cccee1ea59a32a38c5bdff00a26468b4734"},"schema_version":"1.0","source":{"id":"0909.5218","kind":"arxiv","version":1}},"canonical_sha256":"4e02cf2f3e8d0671806a045c0968a2f80f05c7b3514695442c2e7134927f2aad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4e02cf2f3e8d0671806a045c0968a2f80f05c7b3514695442c2e7134927f2aad","first_computed_at":"2026-05-18T02:11:36.647663Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:36.647663Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wiVaFtqe/5S5f4sZkJLljMcsZsIRYfhCSTEWZyVBCnbPzCgU1tiQ8lJLVqv/7uU7RdiZvlwW6MueCnzT3AdfCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:36.648459Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.5218","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48ebe4d3e27a4627398f86d8976b0d8db898cb52d9b265a9213ab007d3dab12c","sha256:cb4a6fbabf49b65f81bd399db360bef1378ada64d77b65463256126dc18ed46e"],"state_sha256":"86ae864f25f349f9c3575b7303f91973db4e3c9cc66e61d48a58ff6f46994f6d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"23ox9/iCFrYX6lYZgkICIxyoAnGVyK++Ubv6mnY2PrSNoOYy/mJ0dmqWE1IBrVnyRZPvdDzIkD4YUO2wXbuJAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T14:15:28.813295Z","bundle_sha256":"c4a9c6dc7ae272b924a556edaa5790b4f2c382e37c8bc460df57feed2dd53ff4"}}