{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:O2YARNZJ7VXX5T2HGQ3SIU7NQC","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":"0f1e78c47304bbcee69dacafe3856b9fa0f7aa9bf5bfa9467d5d2773a2715625","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-25T18:09:42Z","title_canon_sha256":"1b0f3b1997a822004cb37b79f9fe25597a3e059055851f2cef26cfad6d43cbc5"},"schema_version":"1.0","source":{"id":"1801.08508","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.08508","created_at":"2026-05-18T00:23:27Z"},{"alias_kind":"arxiv_version","alias_value":"1801.08508v1","created_at":"2026-05-18T00:23:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.08508","created_at":"2026-05-18T00:23:27Z"},{"alias_kind":"pith_short_12","alias_value":"O2YARNZJ7VXX","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"O2YARNZJ7VXX5T2H","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"O2YARNZJ","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:3ff015ea2a5804459ce6a98967a8c3d2057c3396d1c92fbf1ecade2141aa297d","target":"graph","created_at":"2026-05-18T00:23:27Z","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":"The X-ray spectra of intermediate polars can be modelled to give a direct measurement of white dwarf mass. Here we fit accretion column models to NuSTAR spectra of three intermediate polars; V709 Cas, NY Lup and V1223 Sgr in order to determine their masses. From fits to 3-78 keV spectra, we find masses of $M_{\\rm WD}=0.88^{+0.05}_{-0.04}M_{\\odot}$, $1.16^{+0.04}_{-0.02}M_{\\odot}$ and $0.75\\pm0.02M_{\\odot}$ for V709 Cas, NY Lup and V1223 Sgr, respectively. Our measurements are generally in agreement with those determined by previous surveys of intermediate polars, but with typically a factor $\\","authors_text":"A. W. Shaw, C. O. Heinke, G. R. Sivakoff, J. A. Tomsick, K. Mukai, V. Rana","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-25T18:09:42Z","title":"Measuring the masses of Intermediate Polars with NuSTAR: V709 Cas, NY Lup and V1223 Sgr"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.08508","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":"sha256:1309e6603ae0ef8378a379985855f09113789ac7f12f12b47587595333e348ad","target":"record","created_at":"2026-05-18T00:23:27Z","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":"0f1e78c47304bbcee69dacafe3856b9fa0f7aa9bf5bfa9467d5d2773a2715625","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-25T18:09:42Z","title_canon_sha256":"1b0f3b1997a822004cb37b79f9fe25597a3e059055851f2cef26cfad6d43cbc5"},"schema_version":"1.0","source":{"id":"1801.08508","kind":"arxiv","version":1}},"canonical_sha256":"76b008b729fd6f7ecf4734372453ed809a001a998f87e4383faf5bbb87fe0d83","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"76b008b729fd6f7ecf4734372453ed809a001a998f87e4383faf5bbb87fe0d83","first_computed_at":"2026-05-18T00:23:27.303922Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:23:27.303922Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oRlD6x4yJefOsltiJG/DTALzE2WYgiPWMZXdLHmTS/UpsS/Xfaq+8o/HRBguQeKcNZ66Don12o5JjhzhCc82BA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:23:27.304492Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.08508","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1309e6603ae0ef8378a379985855f09113789ac7f12f12b47587595333e348ad","sha256:3ff015ea2a5804459ce6a98967a8c3d2057c3396d1c92fbf1ecade2141aa297d"],"state_sha256":"4512a8886e71dba5c12a5ce7cb59dbe8f95547a53a1f3813922bc8a038fc6e06"}