{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:GZMSITRC7VGFIFCG67UG6Q4H42","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":"242662e4e7e66ab8f4c73265de03fed3b098ea9ba57cce50335c704095c107f6","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-09T19:00:01Z","title_canon_sha256":"05c2f4878b07228a7a001dddf642e3cd693166ab951a5c4052f4230fd7749a91"},"schema_version":"1.0","source":{"id":"2111.05342","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.05342","created_at":"2026-07-05T03:53:10Z"},{"alias_kind":"arxiv_version","alias_value":"2111.05342v1","created_at":"2026-07-05T03:53:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.05342","created_at":"2026-07-05T03:53:10Z"},{"alias_kind":"pith_short_12","alias_value":"GZMSITRC7VGF","created_at":"2026-07-05T03:53:10Z"},{"alias_kind":"pith_short_16","alias_value":"GZMSITRC7VGFIFCG","created_at":"2026-07-05T03:53:10Z"},{"alias_kind":"pith_short_8","alias_value":"GZMSITRC","created_at":"2026-07-05T03:53:10Z"}],"graph_snapshots":[{"event_id":"sha256:bea543acc98079ba0f0bae36b73a75783b88403d7d208c47d93f19d0b882670d","target":"graph","created_at":"2026-07-05T03:53:10Z","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/2111.05342/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"M51 ULX7 is among a small group of known ultraluminous X-ray pulsars (ULXP). The neutron star powering the source has a spin period of 2.8s, orbits its companion star with a period of 2 days, and a super-orbital period of 38 days is evident in its X-ray lightcurve. Here we present NuSTAR and XMM-Newton data on the source from 2019 obtained when the source was near its peak brightness. We detect the pulsations, having spun up at a rate of 3$\\pm0.5\\times10^{-10}$ s s$^{-1}$ since they were previously detected in 2018. The data also provide the first high-quality broadband spectrum of the source.","authors_text":"Daniel Stern, Dominic J Walton, Felix F\\\"urst, Gian Luca Israel, Hannah Earnshaw, Marianne Heida, Matteo Bachetti, Murray Brightman, Sean Pike","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-09T19:00:01Z","title":"Evolution of the spin, spectrum and super-orbital period of the ultraluminous X-ray pulsar M51 ULX7"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.05342","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":"sha256:7b57f45fb392f1fb7fcc04f56cfda13ceb17cab5b3e82d25263700bca4a123e1","target":"record","created_at":"2026-07-05T03:53:10Z","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":"242662e4e7e66ab8f4c73265de03fed3b098ea9ba57cce50335c704095c107f6","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-09T19:00:01Z","title_canon_sha256":"05c2f4878b07228a7a001dddf642e3cd693166ab951a5c4052f4230fd7749a91"},"schema_version":"1.0","source":{"id":"2111.05342","kind":"arxiv","version":1}},"canonical_sha256":"3659244e22fd4c541446f7e86f4387e69dc98998fe85916d390ef212ab00f45f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3659244e22fd4c541446f7e86f4387e69dc98998fe85916d390ef212ab00f45f","first_computed_at":"2026-07-05T03:53:10.871657Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:53:10.871657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XK6oseRRQbeNB2RT5sQubGNiCkShkGZu5LMtoeMDkIWFdG4wxLJV7AREpICi6MFB5xHhlcXd08tylf0PIhzqDg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:53:10.872084Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.05342","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b57f45fb392f1fb7fcc04f56cfda13ceb17cab5b3e82d25263700bca4a123e1","sha256:bea543acc98079ba0f0bae36b73a75783b88403d7d208c47d93f19d0b882670d"],"state_sha256":"a2c49b9d14e68a5689e9b2c2f8ac9da49fe52b2994e5186f634d4b4c7da44653"}