{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:INSDBHU7AY4RKE2LNABKWLSA2P","short_pith_number":"pith:INSDBHU7","schema_version":"1.0","canonical_sha256":"4364309e9f063915134b6802ab2e40d3f7d160ca314580669bac9bfa177aac2b","source":{"kind":"arxiv","id":"1803.09128","version":1},"attestation_state":"computed","paper":{"title":"Expansion and Brightness Changes in the Pulsar-Wind Nebula in the Composite Supernova Remnant Kes 75","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Kazimierz J. Borkowski, Peter H. Gwynne, Stephen P. Reynolds","submitted_at":"2018-03-24T15:46:31Z","abstract_excerpt":"We report new Chandra X-ray observations of the shell supernova remnant (SNR) Kes 75 (G29.7-0.3) containing a pulsar and pulsar-wind nebula (PWN). Expansion of the PWN is apparent across the four epochs, 2000, 2006, 2009, and 2016. We find an expansion rate between 2000 and 2016 of the NW edge of the PWN of 0.249% +/- 0.023% yr^{-1}, for an expansion age R/(dR/dt) of 400 +/- 40 years and an expansion velocity of about 1000 km s^{-1}. We suggest that the PWN is expanding into an asymmetric nickel bubble in a conventional Type IIP supernova. Some acceleration of the PWN expansion is likely, givi"},"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":"1803.09128","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-03-24T15:46:31Z","cross_cats_sorted":[],"title_canon_sha256":"4ac2b72e859af4562f6b8f5a0d9a1959634b8620ded6b8f9c093df5fb04110bc","abstract_canon_sha256":"f31c42004500696e496f275ff2efbb17886fb1a8d730e7a30e5e169354bfd96b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:18:10.502889Z","signature_b64":"sJ3b8fYTZHg1EHHQZ61VPx19j+yDpI9MwavdYL4VzuRNgOHW4+g4Y8I6z13adk/VvM1bPenngk/yqK3TkThhCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4364309e9f063915134b6802ab2e40d3f7d160ca314580669bac9bfa177aac2b","last_reissued_at":"2026-05-18T00:18:10.502356Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:18:10.502356Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Expansion and Brightness Changes in the Pulsar-Wind Nebula in the Composite Supernova Remnant Kes 75","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Kazimierz J. Borkowski, Peter H. Gwynne, Stephen P. Reynolds","submitted_at":"2018-03-24T15:46:31Z","abstract_excerpt":"We report new Chandra X-ray observations of the shell supernova remnant (SNR) Kes 75 (G29.7-0.3) containing a pulsar and pulsar-wind nebula (PWN). Expansion of the PWN is apparent across the four epochs, 2000, 2006, 2009, and 2016. We find an expansion rate between 2000 and 2016 of the NW edge of the PWN of 0.249% +/- 0.023% yr^{-1}, for an expansion age R/(dR/dt) of 400 +/- 40 years and an expansion velocity of about 1000 km s^{-1}. We suggest that the PWN is expanding into an asymmetric nickel bubble in a conventional Type IIP supernova. Some acceleration of the PWN expansion is likely, givi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.09128","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":"1803.09128","created_at":"2026-05-18T00:18:10.502435+00:00"},{"alias_kind":"arxiv_version","alias_value":"1803.09128v1","created_at":"2026-05-18T00:18:10.502435+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.09128","created_at":"2026-05-18T00:18:10.502435+00:00"},{"alias_kind":"pith_short_12","alias_value":"INSDBHU7AY4R","created_at":"2026-05-18T12:32:31.084164+00:00"},{"alias_kind":"pith_short_16","alias_value":"INSDBHU7AY4RKE2L","created_at":"2026-05-18T12:32:31.084164+00:00"},{"alias_kind":"pith_short_8","alias_value":"INSDBHU7","created_at":"2026-05-18T12:32:31.084164+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/INSDBHU7AY4RKE2LNABKWLSA2P","json":"https://pith.science/pith/INSDBHU7AY4RKE2LNABKWLSA2P.json","graph_json":"https://pith.science/api/pith-number/INSDBHU7AY4RKE2LNABKWLSA2P/graph.json","events_json":"https://pith.science/api/pith-number/INSDBHU7AY4RKE2LNABKWLSA2P/events.json","paper":"https://pith.science/paper/INSDBHU7"},"agent_actions":{"view_html":"https://pith.science/pith/INSDBHU7AY4RKE2LNABKWLSA2P","download_json":"https://pith.science/pith/INSDBHU7AY4RKE2LNABKWLSA2P.json","view_paper":"https://pith.science/paper/INSDBHU7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1803.09128&json=true","fetch_graph":"https://pith.science/api/pith-number/INSDBHU7AY4RKE2LNABKWLSA2P/graph.json","fetch_events":"https://pith.science/api/pith-number/INSDBHU7AY4RKE2LNABKWLSA2P/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/INSDBHU7AY4RKE2LNABKWLSA2P/action/timestamp_anchor","attest_storage":"https://pith.science/pith/INSDBHU7AY4RKE2LNABKWLSA2P/action/storage_attestation","attest_author":"https://pith.science/pith/INSDBHU7AY4RKE2LNABKWLSA2P/action/author_attestation","sign_citation":"https://pith.science/pith/INSDBHU7AY4RKE2LNABKWLSA2P/action/citation_signature","submit_replication":"https://pith.science/pith/INSDBHU7AY4RKE2LNABKWLSA2P/action/replication_record"}},"created_at":"2026-05-18T00:18:10.502435+00:00","updated_at":"2026-05-18T00:18:10.502435+00:00"}