{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:YSNBU352FWPGSJECTA4P53ZAWT","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":"5b54acdad52d44c8b362f2530bf4bca9c8af2afc15d42580e82e8b5ec64cf1ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-09-22T10:31:43Z","title_canon_sha256":"d4723a0a230e746b8f135af10312b0d48642a4796433cf67e81eef450f701a2d"},"schema_version":"1.0","source":{"id":"1709.07679","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.07679","created_at":"2026-05-18T00:21:10Z"},{"alias_kind":"arxiv_version","alias_value":"1709.07679v2","created_at":"2026-05-18T00:21:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.07679","created_at":"2026-05-18T00:21:10Z"},{"alias_kind":"pith_short_12","alias_value":"YSNBU352FWPG","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"YSNBU352FWPGSJEC","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"YSNBU352","created_at":"2026-05-18T12:31:56Z"}],"graph_snapshots":[{"event_id":"sha256:662181218ea8d135543b5631ccfc208053b759a9689c6c5695b24c8618932da4","target":"graph","created_at":"2026-05-18T00:21:10Z","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"},"paper":{"abstract_excerpt":"Calvera is a $59\\,\\mathrm{ms}$ isolated pulsar, being unique due to its non-detection in radio, optical and gamma-rays but the purely thermal emission in soft X-rays. It is suggested that Calvera could be an ordinary middle-aged pulsar with significant magnetospheric activity at a large distance. Alternatively, it is proposed in this paper that Calvera is a low-mass strangeon star with inactive magnetosphere (dead). In this scenario, we jointly fit the spectra obtained by the {\\it XMM-Newton} Observatory and the {\\it Chandra} X-ray Observatory with the strangeon star atmosphere model. The spec","authors_text":"Hao Tong, Mingyu Ge, Renxin Xu, Weiyang Wang, Xiongwei Liu, Yunyang Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-09-22T10:31:43Z","title":"Calvera: A low-mass strangeon star torqued by debris disk?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.07679","kind":"arxiv","version":2},"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:cb202a8e72fffaac38b9ff42ac88b84750cd676bb97ea442cd1abed9e3b5d48c","target":"record","created_at":"2026-05-18T00:21:10Z","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":"5b54acdad52d44c8b362f2530bf4bca9c8af2afc15d42580e82e8b5ec64cf1ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-09-22T10:31:43Z","title_canon_sha256":"d4723a0a230e746b8f135af10312b0d48642a4796433cf67e81eef450f701a2d"},"schema_version":"1.0","source":{"id":"1709.07679","kind":"arxiv","version":2}},"canonical_sha256":"c49a1a6fba2d9e6924829838feef20b4f4b011ac9c639fb1da95a0b59cf388cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c49a1a6fba2d9e6924829838feef20b4f4b011ac9c639fb1da95a0b59cf388cc","first_computed_at":"2026-05-18T00:21:10.893851Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:10.893851Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/vN6IYqgTcebmxvUbBJQbpQJXLzw0Zh+UUtIM5L6Pk/Re3IYNt39wr2EQbQCaNn7CQRZW2qBHgRgyyTJMGPeCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:10.894300Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.07679","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cb202a8e72fffaac38b9ff42ac88b84750cd676bb97ea442cd1abed9e3b5d48c","sha256:662181218ea8d135543b5631ccfc208053b759a9689c6c5695b24c8618932da4"],"state_sha256":"a67da2dc482af86e83e7a749c0a8b520d65bf0a43274cf0f1ccfb1d41cef1552"}