{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:W6I56JSEPEFZGGNGVGOSMRTZ23","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":"d4c66b547092958f425138506ecc98959376a85a681b099aecf0137243b4419a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-10-26T22:39:10Z","title_canon_sha256":"55d123eed031fec013b999fdfbfd7aabed6f01c9a5350c0122de948d490d82a0"},"schema_version":"1.0","source":{"id":"astro-ph/0610809","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0610809","created_at":"2026-07-04T14:56:56Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0610809v1","created_at":"2026-07-04T14:56:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0610809","created_at":"2026-07-04T14:56:56Z"},{"alias_kind":"pith_short_12","alias_value":"W6I56JSEPEFZ","created_at":"2026-07-04T14:56:56Z"},{"alias_kind":"pith_short_16","alias_value":"W6I56JSEPEFZGGNG","created_at":"2026-07-04T14:56:56Z"},{"alias_kind":"pith_short_8","alias_value":"W6I56JSE","created_at":"2026-07-04T14:56:56Z"}],"graph_snapshots":[{"event_id":"sha256:a277cf12fb9b3ac0f25e4c4dac617a8fb9d9a40b0547946fd18804b586f91baf","target":"graph","created_at":"2026-07-04T14:56:56Z","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/astro-ph/0610809/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"(Abridged) We present the results of the systematic survey of X-ray sources in the central region of M31 using the data from XMM-Newton observations performed in the years 2000-2004. The spectral properties and variability of 123 bright X-ray sources with apparent luminosities between ~10^{36} and \\~5x10^{38} ergs/s were studied in detail. The spectral distribution of M31 X-ray sources, based on the spectral fitting with a power law model is clearly bimodal with a main peak corresponding to a photon index Gamma ~ 1.75 and a shoulder at Gamma ~ 2.0-2.2 extending to the soft spectral region, and","authors_text":"France Cordova (UCR), IKI), Sergey Trudolyubov (IGPP/UCR, William Priedhorsky (LANL)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-10-26T22:39:10Z","title":"XMM-Newton survey of the central region of M31. Spectral properties and variability of bright X-ray sources and source classification"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0610809","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":"sha256:97de1b02b8d1d3b6a8cc1ccac52b898381c33760d35908da82c4fa4f6fea2161","target":"record","created_at":"2026-07-04T14:56:56Z","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":"d4c66b547092958f425138506ecc98959376a85a681b099aecf0137243b4419a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-10-26T22:39:10Z","title_canon_sha256":"55d123eed031fec013b999fdfbfd7aabed6f01c9a5350c0122de948d490d82a0"},"schema_version":"1.0","source":{"id":"astro-ph/0610809","kind":"arxiv","version":1}},"canonical_sha256":"b791df2644790b9319a6a99d264679d6c854ba5345bd3c16b80578308bce4ac8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b791df2644790b9319a6a99d264679d6c854ba5345bd3c16b80578308bce4ac8","first_computed_at":"2026-07-04T14:56:56.337498Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:56:56.337498Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/Sk9ta7zf52c9p8b0n57LF5yj/cmhTtkgZgL87kJtG0Ri1DYpH3d2Y9RQJE8F2j4tnHfV6ARQxQ+8qcuGjqgBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T14:56:56.338141Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0610809","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:97de1b02b8d1d3b6a8cc1ccac52b898381c33760d35908da82c4fa4f6fea2161","sha256:a277cf12fb9b3ac0f25e4c4dac617a8fb9d9a40b0547946fd18804b586f91baf"],"state_sha256":"0c9f9b9705e1b46e23fb8b3987fbf45ef95eb32cc9723bac912fbf0cd2722214"}