{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:XFFYDPTCS5SK7L5SZOMQYR6EJO","short_pith_number":"pith:XFFYDPTC","canonical_record":{"source":{"id":"1409.6265","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-22T18:08:39Z","cross_cats_sorted":[],"title_canon_sha256":"4cf71ffa6450f615a67956c2b357cab436914682033893b090d414cca93a4b14","abstract_canon_sha256":"86d55bb8ed54723b593e1a3908dd05a3c6c1efe3da42077d4a35783c8fea841b"},"schema_version":"1.0"},"canonical_sha256":"b94b81be629764afafb2cb990c47c44bbee0eb2b7faad1d5b9a20f13e4116a10","source":{"kind":"arxiv","id":"1409.6265","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.6265","created_at":"2026-05-18T01:30:25Z"},{"alias_kind":"arxiv_version","alias_value":"1409.6265v2","created_at":"2026-05-18T01:30:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.6265","created_at":"2026-05-18T01:30:25Z"},{"alias_kind":"pith_short_12","alias_value":"XFFYDPTCS5SK","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"XFFYDPTCS5SK7L5S","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"XFFYDPTC","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:XFFYDPTCS5SK7L5SZOMQYR6EJO","target":"record","payload":{"canonical_record":{"source":{"id":"1409.6265","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-22T18:08:39Z","cross_cats_sorted":[],"title_canon_sha256":"4cf71ffa6450f615a67956c2b357cab436914682033893b090d414cca93a4b14","abstract_canon_sha256":"86d55bb8ed54723b593e1a3908dd05a3c6c1efe3da42077d4a35783c8fea841b"},"schema_version":"1.0"},"canonical_sha256":"b94b81be629764afafb2cb990c47c44bbee0eb2b7faad1d5b9a20f13e4116a10","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:30:25.748648Z","signature_b64":"QqyxD5aGznEdLZM+c8Q7CFZnMr21dVAc0HmwURaVAHd5bdd9uAXXrk+Vfi8rbN24+09/Vj5ScGmxNuc0cBpMBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b94b81be629764afafb2cb990c47c44bbee0eb2b7faad1d5b9a20f13e4116a10","last_reissued_at":"2026-05-18T01:30:25.747981Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:30:25.747981Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1409.6265","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":"2026-05-18T01:30:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zx2A9fYCNApi39eSPAtT2oWD+Z1fzs8gp6eYTCP9lTm8JpSTmBMLsWULmZ8i0iWDhJylK2eRkhasjHXM5ynVCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T20:42:59.874722Z"},"content_sha256":"6fa0d457c6648f0d0a97f929e4b3166f7a63d587087610a4fd9a1ce7ae35e309","schema_version":"1.0","event_id":"sha256:6fa0d457c6648f0d0a97f929e4b3166f7a63d587087610a4fd9a1ce7ae35e309"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:XFFYDPTCS5SK7L5SZOMQYR6EJO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-level accretion in neutron-star X-ray binaries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Bahramian, C.O. Heinke, D. Altamirano, M. Armas Padilla, M. Linares, N. Degenaar, R. Wijnands, Y. Cavecchi","submitted_at":"2014-09-22T18:08:39Z","abstract_excerpt":"We search the literature for reports on the spectral properties of neutron-star low-mass X-ray binaries when they have accretion luminosities between 1E34 and 1E36 ergs/s. We found that in this luminosity range the photon index (obtained from fitting a simple absorbed power-law in the 0.5-10 keV range) increases with decreasing 0.5-10 keV X-ray luminosity (i.e., the spectrum softens). Such behaviour has been reported before for individual sources, but here we demonstrate that very likely most (if not all) neutron-star systems behave in a similar manner and possibly even follow a universal rela"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.6265","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":""},"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":"2026-05-18T01:30:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y/hu3Lj4FQDyXQ4PS+FU4nSM7Hcz/bBOcGtPNgtIyLH5wNo09K+INicnbVvz3VcS5yg3L/lqogxz6bVOCuphCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T20:42:59.875072Z"},"content_sha256":"3df4ab9f0036abdc3344c5dcd78dfc04c230483275ba4de0ba1afe35450b96c4","schema_version":"1.0","event_id":"sha256:3df4ab9f0036abdc3344c5dcd78dfc04c230483275ba4de0ba1afe35450b96c4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XFFYDPTCS5SK7L5SZOMQYR6EJO/bundle.json","state_url":"https://pith.science/pith/XFFYDPTCS5SK7L5SZOMQYR6EJO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XFFYDPTCS5SK7L5SZOMQYR6EJO/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":"2026-06-03T20:42:59Z","links":{"resolver":"https://pith.science/pith/XFFYDPTCS5SK7L5SZOMQYR6EJO","bundle":"https://pith.science/pith/XFFYDPTCS5SK7L5SZOMQYR6EJO/bundle.json","state":"https://pith.science/pith/XFFYDPTCS5SK7L5SZOMQYR6EJO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XFFYDPTCS5SK7L5SZOMQYR6EJO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:XFFYDPTCS5SK7L5SZOMQYR6EJO","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":"86d55bb8ed54723b593e1a3908dd05a3c6c1efe3da42077d4a35783c8fea841b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-22T18:08:39Z","title_canon_sha256":"4cf71ffa6450f615a67956c2b357cab436914682033893b090d414cca93a4b14"},"schema_version":"1.0","source":{"id":"1409.6265","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.6265","created_at":"2026-05-18T01:30:25Z"},{"alias_kind":"arxiv_version","alias_value":"1409.6265v2","created_at":"2026-05-18T01:30:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.6265","created_at":"2026-05-18T01:30:25Z"},{"alias_kind":"pith_short_12","alias_value":"XFFYDPTCS5SK","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"XFFYDPTCS5SK7L5S","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"XFFYDPTC","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:3df4ab9f0036abdc3344c5dcd78dfc04c230483275ba4de0ba1afe35450b96c4","target":"graph","created_at":"2026-05-18T01:30:25Z","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":"We search the literature for reports on the spectral properties of neutron-star low-mass X-ray binaries when they have accretion luminosities between 1E34 and 1E36 ergs/s. We found that in this luminosity range the photon index (obtained from fitting a simple absorbed power-law in the 0.5-10 keV range) increases with decreasing 0.5-10 keV X-ray luminosity (i.e., the spectrum softens). Such behaviour has been reported before for individual sources, but here we demonstrate that very likely most (if not all) neutron-star systems behave in a similar manner and possibly even follow a universal rela","authors_text":"A. Bahramian, C.O. Heinke, D. Altamirano, M. Armas Padilla, M. Linares, N. Degenaar, R. Wijnands, Y. Cavecchi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-22T18:08:39Z","title":"Low-level accretion in neutron-star X-ray binaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.6265","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":"sha256:6fa0d457c6648f0d0a97f929e4b3166f7a63d587087610a4fd9a1ce7ae35e309","target":"record","created_at":"2026-05-18T01:30:25Z","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":"86d55bb8ed54723b593e1a3908dd05a3c6c1efe3da42077d4a35783c8fea841b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-22T18:08:39Z","title_canon_sha256":"4cf71ffa6450f615a67956c2b357cab436914682033893b090d414cca93a4b14"},"schema_version":"1.0","source":{"id":"1409.6265","kind":"arxiv","version":2}},"canonical_sha256":"b94b81be629764afafb2cb990c47c44bbee0eb2b7faad1d5b9a20f13e4116a10","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b94b81be629764afafb2cb990c47c44bbee0eb2b7faad1d5b9a20f13e4116a10","first_computed_at":"2026-05-18T01:30:25.747981Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:25.747981Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QqyxD5aGznEdLZM+c8Q7CFZnMr21dVAc0HmwURaVAHd5bdd9uAXXrk+Vfi8rbN24+09/Vj5ScGmxNuc0cBpMBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:25.748648Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.6265","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6fa0d457c6648f0d0a97f929e4b3166f7a63d587087610a4fd9a1ce7ae35e309","sha256:3df4ab9f0036abdc3344c5dcd78dfc04c230483275ba4de0ba1afe35450b96c4"],"state_sha256":"6f7671405c3d226a604440e2b170b82ea4518f8324e9906925171851efbb4c5c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iGBJZGJ30+1v0ewwQXMvIRdm9GSxHjnSgM0I1qDvVh+NWJjVUdYwLfe6MaVCBac1qzI+LEC57QKTz5lvCDArAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T20:42:59.877032Z","bundle_sha256":"1964ab62e2728fc1d3d274aa92285672468a4dfaaf918e9f155d0640d3c73ad4"}}