{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:W2OHJJBRMBQ6PALN7HPOXUGKX7","short_pith_number":"pith:W2OHJJBR","schema_version":"1.0","canonical_sha256":"b69c74a4316061e7816df9deebd0cabfff55574cd2215f61b1917c394d5b31b0","source":{"kind":"arxiv","id":"1802.10341","version":1},"attestation_state":"computed","paper":{"title":"Discovery of pulsations from NGC 300 ULX1 and its fast period evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"C. Maitra, F. Haberl, G. Vasilopoulos, S. Carpano","submitted_at":"2018-02-28T10:19:46Z","abstract_excerpt":"The supernova impostor SN 2010da located in the nearby galaxy NGC 300, later identified as a likely supergiant B[e] high-mass X-ray binary, was simultaneously observed by NuSTAR and XMM-Newton between 2016 December 16 and 20, over a total time span of 310 ks. We report the discovery of a strong periodic modulation in the X-ray flux with a pulse period of 31.6 s and a very rapid spin-up, and confirm therefore that the compact object is a neutron star. We find that the spin period is changing from 31.71 s to 31.54 s over that period, with a spin-up rate of -5.56 x 10-7 s s-1, likely the largest "},"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":"1802.10341","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-02-28T10:19:46Z","cross_cats_sorted":[],"title_canon_sha256":"048bd1b4716e687ca300f0ba910c27041bfb66204d83b1f2c7695e29c8ef8d18","abstract_canon_sha256":"e3c60cc63c488dd612a40ef2f234e44ebdfbd7969aa46bbe6d9dd5c1ed34f66b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:21:05.659582Z","signature_b64":"/VBq/HVlk5vaqr9YhtEff/p07cG/MKbGGIEY5rDvkncDSEo29MXOuKA45yUQ2fP9VKOGLV928J8sZREMr9fFDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b69c74a4316061e7816df9deebd0cabfff55574cd2215f61b1917c394d5b31b0","last_reissued_at":"2026-05-18T00:21:05.659062Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:21:05.659062Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Discovery of pulsations from NGC 300 ULX1 and its fast period evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"C. Maitra, F. Haberl, G. Vasilopoulos, S. Carpano","submitted_at":"2018-02-28T10:19:46Z","abstract_excerpt":"The supernova impostor SN 2010da located in the nearby galaxy NGC 300, later identified as a likely supergiant B[e] high-mass X-ray binary, was simultaneously observed by NuSTAR and XMM-Newton between 2016 December 16 and 20, over a total time span of 310 ks. We report the discovery of a strong periodic modulation in the X-ray flux with a pulse period of 31.6 s and a very rapid spin-up, and confirm therefore that the compact object is a neutron star. We find that the spin period is changing from 31.71 s to 31.54 s over that period, with a spin-up rate of -5.56 x 10-7 s s-1, likely the largest "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.10341","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":"1802.10341","created_at":"2026-05-18T00:21:05.659141+00:00"},{"alias_kind":"arxiv_version","alias_value":"1802.10341v1","created_at":"2026-05-18T00:21:05.659141+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.10341","created_at":"2026-05-18T00:21:05.659141+00:00"},{"alias_kind":"pith_short_12","alias_value":"W2OHJJBRMBQ6","created_at":"2026-05-18T12:32:59.047623+00:00"},{"alias_kind":"pith_short_16","alias_value":"W2OHJJBRMBQ6PALN","created_at":"2026-05-18T12:32:59.047623+00:00"},{"alias_kind":"pith_short_8","alias_value":"W2OHJJBR","created_at":"2026-05-18T12:32:59.047623+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":95,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/W2OHJJBRMBQ6PALN7HPOXUGKX7","json":"https://pith.science/pith/W2OHJJBRMBQ6PALN7HPOXUGKX7.json","graph_json":"https://pith.science/api/pith-number/W2OHJJBRMBQ6PALN7HPOXUGKX7/graph.json","events_json":"https://pith.science/api/pith-number/W2OHJJBRMBQ6PALN7HPOXUGKX7/events.json","paper":"https://pith.science/paper/W2OHJJBR"},"agent_actions":{"view_html":"https://pith.science/pith/W2OHJJBRMBQ6PALN7HPOXUGKX7","download_json":"https://pith.science/pith/W2OHJJBRMBQ6PALN7HPOXUGKX7.json","view_paper":"https://pith.science/paper/W2OHJJBR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1802.10341&json=true","fetch_graph":"https://pith.science/api/pith-number/W2OHJJBRMBQ6PALN7HPOXUGKX7/graph.json","fetch_events":"https://pith.science/api/pith-number/W2OHJJBRMBQ6PALN7HPOXUGKX7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/W2OHJJBRMBQ6PALN7HPOXUGKX7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/W2OHJJBRMBQ6PALN7HPOXUGKX7/action/storage_attestation","attest_author":"https://pith.science/pith/W2OHJJBRMBQ6PALN7HPOXUGKX7/action/author_attestation","sign_citation":"https://pith.science/pith/W2OHJJBRMBQ6PALN7HPOXUGKX7/action/citation_signature","submit_replication":"https://pith.science/pith/W2OHJJBRMBQ6PALN7HPOXUGKX7/action/replication_record"}},"created_at":"2026-05-18T00:21:05.659141+00:00","updated_at":"2026-05-18T00:21:05.659141+00:00"}