{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:O3QTXIEQBJM2DW66GLU3AU3FAY","short_pith_number":"pith:O3QTXIEQ","schema_version":"1.0","canonical_sha256":"76e13ba0900a59a1dbde32e9b05365062a504663b3f374cbb64b4284baf4412f","source":{"kind":"arxiv","id":"1906.00640","version":1},"attestation_state":"computed","paper":{"title":"The discovery of weak coherent pulsations in the ultraluminous X-ray source NGC 1313 X-2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. C. Fabian, C. Pinto, D. J. Walton, F. Fuerst, H. P. Earnshaw, M. Bachetti, M. J. Middleton, R. Sathyaprakash, R. Soria, T.P. Roberts, W. N. Alston","submitted_at":"2019-06-03T08:51:47Z","abstract_excerpt":"We report the detection of weak pulsations from the archetypal ultraluminous X-ray source (ULX) NGC 1313 X-2. Acceleration searches reveal sinusoidal pulsations in segments of two out of six new deep observations of this object, with a period of $\\sim$ 1.5 s and a pulsed fraction of $\\sim$ 5%. We use Monte Carlo simulations to demonstrate that the individual detections are unlikely to originate in false Poisson noise detections given their very close frequencies; their strong similarity to other pulsations detected from ULXs also argues they are real. The presence of a large bubble nebula surr"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1906.00640","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-06-03T08:51:47Z","cross_cats_sorted":[],"title_canon_sha256":"db075002addb323096c564b7d9f3d58ba237788660208b704bf3f631c3eec44f","abstract_canon_sha256":"41bf691702a1804a9b63580e9cb12656f2a47fc9f537c6533ad7e7bdec65d2e4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:08.047754Z","signature_b64":"5MLinMjlne5td/FMqM9mbXym93xGWV14CxDhLA5VbM2fkK6eLAA2kvE2vSZDrN5zFUkLcbxPF56f101I6lXWDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"76e13ba0900a59a1dbde32e9b05365062a504663b3f374cbb64b4284baf4412f","last_reissued_at":"2026-05-17T23:41:08.046991Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:08.046991Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The discovery of weak coherent pulsations in the ultraluminous X-ray source NGC 1313 X-2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. C. Fabian, C. Pinto, D. J. Walton, F. Fuerst, H. P. Earnshaw, M. Bachetti, M. J. Middleton, R. Sathyaprakash, R. Soria, T.P. Roberts, W. N. Alston","submitted_at":"2019-06-03T08:51:47Z","abstract_excerpt":"We report the detection of weak pulsations from the archetypal ultraluminous X-ray source (ULX) NGC 1313 X-2. Acceleration searches reveal sinusoidal pulsations in segments of two out of six new deep observations of this object, with a period of $\\sim$ 1.5 s and a pulsed fraction of $\\sim$ 5%. We use Monte Carlo simulations to demonstrate that the individual detections are unlikely to originate in false Poisson noise detections given their very close frequencies; their strong similarity to other pulsations detected from ULXs also argues they are real. The presence of a large bubble nebula surr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.00640","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1906.00640","created_at":"2026-05-17T23:41:08.047104+00:00"},{"alias_kind":"arxiv_version","alias_value":"1906.00640v1","created_at":"2026-05-17T23:41:08.047104+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.00640","created_at":"2026-05-17T23:41:08.047104+00:00"},{"alias_kind":"pith_short_12","alias_value":"O3QTXIEQBJM2","created_at":"2026-05-18T12:33:24.271573+00:00"},{"alias_kind":"pith_short_16","alias_value":"O3QTXIEQBJM2DW66","created_at":"2026-05-18T12:33:24.271573+00:00"},{"alias_kind":"pith_short_8","alias_value":"O3QTXIEQ","created_at":"2026-05-18T12:33:24.271573+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.15137","citing_title":"Significant or Not? The Impact of Randomisation During Data Reduction on Confirming a New Pulsating Ultraluminous X-ray Source Candidate in Centaurus A","ref_index":96,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/O3QTXIEQBJM2DW66GLU3AU3FAY","json":"https://pith.science/pith/O3QTXIEQBJM2DW66GLU3AU3FAY.json","graph_json":"https://pith.science/api/pith-number/O3QTXIEQBJM2DW66GLU3AU3FAY/graph.json","events_json":"https://pith.science/api/pith-number/O3QTXIEQBJM2DW66GLU3AU3FAY/events.json","paper":"https://pith.science/paper/O3QTXIEQ"},"agent_actions":{"view_html":"https://pith.science/pith/O3QTXIEQBJM2DW66GLU3AU3FAY","download_json":"https://pith.science/pith/O3QTXIEQBJM2DW66GLU3AU3FAY.json","view_paper":"https://pith.science/paper/O3QTXIEQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1906.00640&json=true","fetch_graph":"https://pith.science/api/pith-number/O3QTXIEQBJM2DW66GLU3AU3FAY/graph.json","fetch_events":"https://pith.science/api/pith-number/O3QTXIEQBJM2DW66GLU3AU3FAY/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/O3QTXIEQBJM2DW66GLU3AU3FAY/action/timestamp_anchor","attest_storage":"https://pith.science/pith/O3QTXIEQBJM2DW66GLU3AU3FAY/action/storage_attestation","attest_author":"https://pith.science/pith/O3QTXIEQBJM2DW66GLU3AU3FAY/action/author_attestation","sign_citation":"https://pith.science/pith/O3QTXIEQBJM2DW66GLU3AU3FAY/action/citation_signature","submit_replication":"https://pith.science/pith/O3QTXIEQBJM2DW66GLU3AU3FAY/action/replication_record"}},"created_at":"2026-05-17T23:41:08.047104+00:00","updated_at":"2026-05-17T23:41:08.047104+00:00"}