{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:LIBVY6JQXS4IB2GEOKU6UBPTYE","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":"14946da378cb38489c867d344654edc19260e29d1c05973d67d4d096a3c738db","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-15T10:11:44Z","title_canon_sha256":"58da4c45f87d0ee99f98b818c7f7db81685d4bcdba4417828a8ed0bb84c9fbf6"},"schema_version":"1.0","source":{"id":"1210.3965","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.3965","created_at":"2026-05-18T01:53:55Z"},{"alias_kind":"arxiv_version","alias_value":"1210.3965v2","created_at":"2026-05-18T01:53:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.3965","created_at":"2026-05-18T01:53:55Z"},{"alias_kind":"pith_short_12","alias_value":"LIBVY6JQXS4I","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"LIBVY6JQXS4IB2GE","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"LIBVY6JQ","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:4aef515db96a8545adc0cd132dee4c292490a182a4282c7e7f907e79c4b22364","target":"graph","created_at":"2026-05-18T01:53:55Z","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":"Ultra-Luminous X-ray sources are accreting black holes that might represent strong evidence of the Intermediate Mass Black Holes (IMBH), proposed to exist by theoretical studies but with no firm detection (as a class) so far. We analyze the best X-ray timing and spectral data from the ULX in NGC 5408 provided by XMM-Newton. The main goal is to study the broad-band noise variability of the source. We found an anti-correlation of the fractional root-mean square variability versus the intensity of the source, similar to black-hole binaries during hard states.","authors_text":"(2) INAF-OAB, A. Wolter (2) ((1) INAF-OAB, Brera), M. D. Caballero-Garcia (1), Merate, S. E. Motta (1), T. M. Belloni (1)","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-15T10:11:44Z","title":"The aperiodic variability of the Ultraluminous X-ray source in NGC 5408"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.3965","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":"sha256:120a6850deffe094c8af6a8cd4eb2ba9d18cbff95c2c1cff3ca0839e4ffd1a5e","target":"record","created_at":"2026-05-18T01:53:55Z","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":"14946da378cb38489c867d344654edc19260e29d1c05973d67d4d096a3c738db","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-15T10:11:44Z","title_canon_sha256":"58da4c45f87d0ee99f98b818c7f7db81685d4bcdba4417828a8ed0bb84c9fbf6"},"schema_version":"1.0","source":{"id":"1210.3965","kind":"arxiv","version":2}},"canonical_sha256":"5a035c7930bcb880e8c472a9ea05f3c1323c5750a7ebb1f77bbf1fb1e470b631","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a035c7930bcb880e8c472a9ea05f3c1323c5750a7ebb1f77bbf1fb1e470b631","first_computed_at":"2026-05-18T01:53:55.358376Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:53:55.358376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pZXaYMUOntTmxSt1i1eV2L9Y3WOxoKhQUCyBLm57E0NB4/xKii+BeSDi8rHRcCBRA350VRvabcljW332Y5jzAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:53:55.359121Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.3965","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:120a6850deffe094c8af6a8cd4eb2ba9d18cbff95c2c1cff3ca0839e4ffd1a5e","sha256:4aef515db96a8545adc0cd132dee4c292490a182a4282c7e7f907e79c4b22364"],"state_sha256":"8a4a81a41e0d6fa2a4dd1031c0f7497f5173e7bbcf4ad4592d49579a060d4f28"}