{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:RC3JC5XRNFM6SW5S7Z4QFLPC5W","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":"e41d891b6bb42baab343003fba1432ee5001dec18277b185acd91af38b443304","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-22T21:33:14Z","title_canon_sha256":"2f128d8b20ad38d9b9dc2c2dd36221d970466f8f5141ee7cef03b8d4e46085c2"},"schema_version":"1.0","source":{"id":"0901.3562","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.3562","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"arxiv_version","alias_value":"0901.3562v1","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.3562","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"pith_short_12","alias_value":"RC3JC5XRNFM6","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"pith_short_16","alias_value":"RC3JC5XRNFM6SW5S","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"pith_short_8","alias_value":"RC3JC5XR","created_at":"2026-07-04T17:14:17Z"}],"graph_snapshots":[{"event_id":"sha256:abc0bc2a16e767729d7a40d9c8512157d55b492842aade6e8852cc21ce8c65b7","target":"graph","created_at":"2026-07-04T17:14:17Z","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/0901.3562/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"White dwarf masses in cataclysmic variables are difficult to determine accurately, but are fundamental for understanding binary system parameters, as well as binary evolution. We investigate the X-ray spectral properties of a sample of Intermediate Polars detected above 15 keV to derive the masses of their accreting white dwarfs. We use data from the Swift/BAT instrument which during the first 2.5 yrs of operation has detected 22 known intermediate polars. The X-ray spectra of these sources are used to estimate the mass of the white dwarfs. We are able to produce a mass estimate for 22 out of ","authors_text":"Jochen Greiner, Jorg Brunschweiger, Julian Osborne, Marco Ajello","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-22T21:33:14Z","title":"Intermediate polars in the Swift/BAT survey: Spectra and white dwarf masses"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.3562","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":"sha256:19e87b9f66c318286522b6722f9de88d09ce0036d53c4632502e33c2e70a7701","target":"record","created_at":"2026-07-04T17:14:17Z","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":"e41d891b6bb42baab343003fba1432ee5001dec18277b185acd91af38b443304","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-22T21:33:14Z","title_canon_sha256":"2f128d8b20ad38d9b9dc2c2dd36221d970466f8f5141ee7cef03b8d4e46085c2"},"schema_version":"1.0","source":{"id":"0901.3562","kind":"arxiv","version":1}},"canonical_sha256":"88b69176f16959e95bb2fe7902ade2ed9f7bafc43af590b03b110c7884826735","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"88b69176f16959e95bb2fe7902ade2ed9f7bafc43af590b03b110c7884826735","first_computed_at":"2026-07-04T17:14:17.128670Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:14:17.128670Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DVH/sGqQYlPp4Di8silXkSTs9/sBfwTd1/XAkk/1AkROQ2XSzCO2wS1vVc6gpmfkB7xONTj4P0Ij5amrpy/BAA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:14:17.129100Z","signed_message":"canonical_sha256_bytes"},"source_id":"0901.3562","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:19e87b9f66c318286522b6722f9de88d09ce0036d53c4632502e33c2e70a7701","sha256:abc0bc2a16e767729d7a40d9c8512157d55b492842aade6e8852cc21ce8c65b7"],"state_sha256":"7f5191a1c37364a74bc4e63fd5fcb9d7162d1e2dc8bebd2877195702c2bb39e3"}