{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:Y3VNTX7YPMCJ3J3JAEWPNWSU7B","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":"ca8e1445f59642508cdae3c1be2ba1117bf42db8aea15a59d14bb295629e528f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2008-01-28T10:25:03Z","title_canon_sha256":"a23889329a1c27648d8d8fc83377dc9f77214f1c27e25e48da3f95548140a85e"},"schema_version":"1.0","source":{"id":"0801.4226","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.4226","created_at":"2026-07-04T17:09:01Z"},{"alias_kind":"arxiv_version","alias_value":"0801.4226v1","created_at":"2026-07-04T17:09:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.4226","created_at":"2026-07-04T17:09:01Z"},{"alias_kind":"pith_short_12","alias_value":"Y3VNTX7YPMCJ","created_at":"2026-07-04T17:09:01Z"},{"alias_kind":"pith_short_16","alias_value":"Y3VNTX7YPMCJ3J3J","created_at":"2026-07-04T17:09:01Z"},{"alias_kind":"pith_short_8","alias_value":"Y3VNTX7Y","created_at":"2026-07-04T17:09:01Z"}],"graph_snapshots":[{"event_id":"sha256:9a3a7895493ba192edd1b1cc664068d098128c86975347eb4de90b9031384911","target":"graph","created_at":"2026-07-04T17:09:01Z","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/0801.4226/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an extension to our XMM-Newton X-ray source catalogue of M 31, containing 39 newly found sources. In order to classify and identify more of the sources we search for X-ray time variability in XMM-Newton archival data of the M 31 centre field.\n  As a source list we used our extended catalogue based on observations covering the time span from June 2000 to July 2004. We then determined the flux or at least an upper limit at the source positions for each observation. Deriving the flux ratios for the different observations and searching for the maximum flux difference we determined varia","authors_text":"F. Haberl, H. Stiele, M. Freyberg, W. Pietsch","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2008-01-28T10:25:03Z","title":"Time variability of X-ray sources in the M 31 centre field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.4226","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":"sha256:541f0181797cd95c391027370d9857f0918d6175d98d98d73ffb017509ae010c","target":"record","created_at":"2026-07-04T17:09:01Z","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":"ca8e1445f59642508cdae3c1be2ba1117bf42db8aea15a59d14bb295629e528f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2008-01-28T10:25:03Z","title_canon_sha256":"a23889329a1c27648d8d8fc83377dc9f77214f1c27e25e48da3f95548140a85e"},"schema_version":"1.0","source":{"id":"0801.4226","kind":"arxiv","version":1}},"canonical_sha256":"c6ead9dff87b049da769012cf6da54f85f23da359c09446f43f5008d3a992af1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6ead9dff87b049da769012cf6da54f85f23da359c09446f43f5008d3a992af1","first_computed_at":"2026-07-04T17:09:01.157566Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:09:01.157566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"COlz7bdyk2kq+5YX8RbFch+R1BG4eBYSJ0HnbmJw2eBwpn4rn3TyGfRVB6AGTk2U0ZnWQY4YP23TudYPm1hxAQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:09:01.161473Z","signed_message":"canonical_sha256_bytes"},"source_id":"0801.4226","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:541f0181797cd95c391027370d9857f0918d6175d98d98d73ffb017509ae010c","sha256:9a3a7895493ba192edd1b1cc664068d098128c86975347eb4de90b9031384911"],"state_sha256":"0389da9d50819a566eaac3791a174d13f2f5725c6734f1604042a562ac6a4138"}