{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:T23VCTTLSIHQRFS3YS5PEZXZZL","short_pith_number":"pith:T23VCTTL","canonical_record":{"source":{"id":"2507.15032","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-20T16:33:18Z","cross_cats_sorted":["astro-ph.IM","cs.AI","cs.LG"],"title_canon_sha256":"7c764dcef1852723cbd79d85cd1a34db49d68f22a88f5ed51483ef55efb1308c","abstract_canon_sha256":"aab6af462ff728990030f7d4b4ba8cb3e4dbc7eb80a25c1501c8164b293509a4"},"schema_version":"1.0"},"canonical_sha256":"9eb7514e6b920f08965bc4baf266f9cac6625536025e52cd2fff34505a5080be","source":{"kind":"arxiv","id":"2507.15032","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.15032","created_at":"2026-07-05T12:07:39Z"},{"alias_kind":"arxiv_version","alias_value":"2507.15032v1","created_at":"2026-07-05T12:07:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.15032","created_at":"2026-07-05T12:07:39Z"},{"alias_kind":"pith_short_12","alias_value":"T23VCTTLSIHQ","created_at":"2026-07-05T12:07:39Z"},{"alias_kind":"pith_short_16","alias_value":"T23VCTTLSIHQRFS3","created_at":"2026-07-05T12:07:39Z"},{"alias_kind":"pith_short_8","alias_value":"T23VCTTL","created_at":"2026-07-05T12:07:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:T23VCTTLSIHQRFS3YS5PEZXZZL","target":"record","payload":{"canonical_record":{"source":{"id":"2507.15032","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-20T16:33:18Z","cross_cats_sorted":["astro-ph.IM","cs.AI","cs.LG"],"title_canon_sha256":"7c764dcef1852723cbd79d85cd1a34db49d68f22a88f5ed51483ef55efb1308c","abstract_canon_sha256":"aab6af462ff728990030f7d4b4ba8cb3e4dbc7eb80a25c1501c8164b293509a4"},"schema_version":"1.0"},"canonical_sha256":"9eb7514e6b920f08965bc4baf266f9cac6625536025e52cd2fff34505a5080be","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:07:39.789827Z","signature_b64":"cGIibsq7OqSQNsOWFYAfROk1TSgZNHYAghDW3xgf7cNcCaWr/xX+PTSU8IC4/6lukZf8eDV3qb2132XEm+j7BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9eb7514e6b920f08965bc4baf266f9cac6625536025e52cd2fff34505a5080be","last_reissued_at":"2026-07-05T12:07:39.789362Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:07:39.789362Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.15032","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T12:07:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M1a4O1J9lXeBk+7ZolXQgXk9jOKb5Mwefyh8aQMP0vZVskynkcGDYJbei1fl+h+/py+tvDFT/7WqarQfYqSOBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T16:06:55.991494Z"},"content_sha256":"7d2beeafedce346444740554d5585799e401fdc34a760d7da1b77300b85c77ea","schema_version":"1.0","event_id":"sha256:7d2beeafedce346444740554d5585799e401fdc34a760d7da1b77300b85c77ea"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:T23VCTTLSIHQRFS3YS5PEZXZZL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The hunt for new pulsating ultraluminous X-ray sources: a clustering approach","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.IM","cs.AI","cs.LG"],"primary_cat":"astro-ph.HE","authors_text":"Andrea Belfiore, GianLuca Israel, Konstantinos Kovlakas, Mario Pasquato, Matteo Imbrogno, Nicol\\`o Oreste Pinciroli Vago, Piero Fraternali, Roberta Amato","submitted_at":"2025-07-20T16:33:18Z","abstract_excerpt":"The discovery of fast and variable coherent signals in a handful of ultraluminous X-ray sources (ULXs) testifies to the presence of super-Eddington accreting neutron stars, and drastically changed the understanding of the ULX class. Our capability of discovering pulsations in ULXs is limited, among others, by poor statistics. However, catalogues and archives of high-energy missions contain information which can be used to identify new candidate pulsating ULXs (PULXs). The goal of this research is to single out candidate PULXs among those ULXs which have not shown pulsations due to an unfavoura"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.15032","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.15032/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T12:07:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TVdArpKLMFXGYdCqAmBlyVtp6BhXkUwBUFT54Mcc4OtXXY4TURCp46gDZdykcEsyIhGmEzmPguBOibtHyYMrBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T16:06:55.991853Z"},"content_sha256":"16ca2c24dbc6ac9a15586f0c168a3e06509abb953f0405d3f50053b44c5c703d","schema_version":"1.0","event_id":"sha256:16ca2c24dbc6ac9a15586f0c168a3e06509abb953f0405d3f50053b44c5c703d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T23VCTTLSIHQRFS3YS5PEZXZZL/bundle.json","state_url":"https://pith.science/pith/T23VCTTLSIHQRFS3YS5PEZXZZL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T23VCTTLSIHQRFS3YS5PEZXZZL/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":"2026-08-11T16:06:55Z","links":{"resolver":"https://pith.science/pith/T23VCTTLSIHQRFS3YS5PEZXZZL","bundle":"https://pith.science/pith/T23VCTTLSIHQRFS3YS5PEZXZZL/bundle.json","state":"https://pith.science/pith/T23VCTTLSIHQRFS3YS5PEZXZZL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T23VCTTLSIHQRFS3YS5PEZXZZL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:T23VCTTLSIHQRFS3YS5PEZXZZL","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":"aab6af462ff728990030f7d4b4ba8cb3e4dbc7eb80a25c1501c8164b293509a4","cross_cats_sorted":["astro-ph.IM","cs.AI","cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-20T16:33:18Z","title_canon_sha256":"7c764dcef1852723cbd79d85cd1a34db49d68f22a88f5ed51483ef55efb1308c"},"schema_version":"1.0","source":{"id":"2507.15032","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.15032","created_at":"2026-07-05T12:07:39Z"},{"alias_kind":"arxiv_version","alias_value":"2507.15032v1","created_at":"2026-07-05T12:07:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.15032","created_at":"2026-07-05T12:07:39Z"},{"alias_kind":"pith_short_12","alias_value":"T23VCTTLSIHQ","created_at":"2026-07-05T12:07:39Z"},{"alias_kind":"pith_short_16","alias_value":"T23VCTTLSIHQRFS3","created_at":"2026-07-05T12:07:39Z"},{"alias_kind":"pith_short_8","alias_value":"T23VCTTL","created_at":"2026-07-05T12:07:39Z"}],"graph_snapshots":[{"event_id":"sha256:16ca2c24dbc6ac9a15586f0c168a3e06509abb953f0405d3f50053b44c5c703d","target":"graph","created_at":"2026-07-05T12:07:39Z","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/2507.15032/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The discovery of fast and variable coherent signals in a handful of ultraluminous X-ray sources (ULXs) testifies to the presence of super-Eddington accreting neutron stars, and drastically changed the understanding of the ULX class. Our capability of discovering pulsations in ULXs is limited, among others, by poor statistics. However, catalogues and archives of high-energy missions contain information which can be used to identify new candidate pulsating ULXs (PULXs). The goal of this research is to single out candidate PULXs among those ULXs which have not shown pulsations due to an unfavoura","authors_text":"Andrea Belfiore, GianLuca Israel, Konstantinos Kovlakas, Mario Pasquato, Matteo Imbrogno, Nicol\\`o Oreste Pinciroli Vago, Piero Fraternali, Roberta Amato","cross_cats":["astro-ph.IM","cs.AI","cs.LG"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-20T16:33:18Z","title":"The hunt for new pulsating ultraluminous X-ray sources: a clustering approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.15032","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":"sha256:7d2beeafedce346444740554d5585799e401fdc34a760d7da1b77300b85c77ea","target":"record","created_at":"2026-07-05T12:07:39Z","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":"aab6af462ff728990030f7d4b4ba8cb3e4dbc7eb80a25c1501c8164b293509a4","cross_cats_sorted":["astro-ph.IM","cs.AI","cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-20T16:33:18Z","title_canon_sha256":"7c764dcef1852723cbd79d85cd1a34db49d68f22a88f5ed51483ef55efb1308c"},"schema_version":"1.0","source":{"id":"2507.15032","kind":"arxiv","version":1}},"canonical_sha256":"9eb7514e6b920f08965bc4baf266f9cac6625536025e52cd2fff34505a5080be","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9eb7514e6b920f08965bc4baf266f9cac6625536025e52cd2fff34505a5080be","first_computed_at":"2026-07-05T12:07:39.789362Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:07:39.789362Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cGIibsq7OqSQNsOWFYAfROk1TSgZNHYAghDW3xgf7cNcCaWr/xX+PTSU8IC4/6lukZf8eDV3qb2132XEm+j7BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T12:07:39.789827Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.15032","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7d2beeafedce346444740554d5585799e401fdc34a760d7da1b77300b85c77ea","sha256:16ca2c24dbc6ac9a15586f0c168a3e06509abb953f0405d3f50053b44c5c703d"],"state_sha256":"3479f4c9d92446346835d47ae8a1a7f4f95821fca2874f0edb8b070a1eba7a09"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Kty8tqyjKRWEtlabE8YLnLqmo49D4q8VsHi4hAZwXe4n0OYp+9Ti83ofxMqTe9ur0xpTFB2+SsXdnbp0v0VDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T16:06:55.995641Z","bundle_sha256":"5b3c51306d9e34173e5a8957eaf755f726dd13551bdc5382ffed5b6756fb7510"}}