{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:XW27F34PIW5VPDXBLHV3BABWS7","short_pith_number":"pith:XW27F34P","canonical_record":{"source":{"id":"1705.03155","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-09T03:04:31Z","cross_cats_sorted":[],"title_canon_sha256":"4fec075d758b31a1c69cc6ad8f34649770e99de167c9d6f02fddd753852f12df","abstract_canon_sha256":"8bdf46c6f136a5be2b84fb8ecb0745e2f3b7ae8958166644d8de78c9127fe523"},"schema_version":"1.0"},"canonical_sha256":"bdb5f2ef8f45bb578ee159ebb0803697cffdcb96aac82e8a6ed840855783cd2a","source":{"kind":"arxiv","id":"1705.03155","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.03155","created_at":"2026-05-18T00:44:22Z"},{"alias_kind":"arxiv_version","alias_value":"1705.03155v1","created_at":"2026-05-18T00:44:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.03155","created_at":"2026-05-18T00:44:22Z"},{"alias_kind":"pith_short_12","alias_value":"XW27F34PIW5V","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"XW27F34PIW5VPDXB","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"XW27F34P","created_at":"2026-05-18T12:31:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:XW27F34PIW5VPDXBLHV3BABWS7","target":"record","payload":{"canonical_record":{"source":{"id":"1705.03155","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-09T03:04:31Z","cross_cats_sorted":[],"title_canon_sha256":"4fec075d758b31a1c69cc6ad8f34649770e99de167c9d6f02fddd753852f12df","abstract_canon_sha256":"8bdf46c6f136a5be2b84fb8ecb0745e2f3b7ae8958166644d8de78c9127fe523"},"schema_version":"1.0"},"canonical_sha256":"bdb5f2ef8f45bb578ee159ebb0803697cffdcb96aac82e8a6ed840855783cd2a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:44:22.977483Z","signature_b64":"fFCeN0+6wUh9h/F16RdPKEN/843TH/jjP8qQ+eVqqVg/qosChbekCh03ApWNPtu7qrs8P9JwYrLPOn8SHQPYDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bdb5f2ef8f45bb578ee159ebb0803697cffdcb96aac82e8a6ed840855783cd2a","last_reissued_at":"2026-05-18T00:44:22.977006Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:44:22.977006Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.03155","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:44:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0Ljok27EgJN1GTW3v62d3lihmolfv3kSWlNQ/e2XtjFqJ4NlWkdQ+sCHqdBBFGNv7CLWlc2ahL9CnUmBLnGlAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:13:11.235099Z"},"content_sha256":"f144af973815cdda5ec46472dd1b7cedd309f418d8cd5602b71ad82e3309e6ca","schema_version":"1.0","event_id":"sha256:f144af973815cdda5ec46472dd1b7cedd309f418d8cd5602b71ad82e3309e6ca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:XW27F34PIW5VPDXBLHV3BABWS7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"WZ Sge: an eclipsing cataclysmic variable evolving towards the period minimum","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Irina Voloshina, L.-Y. Zhu, S.-B. Qian, Z.-T. Han","submitted_at":"2017-05-09T03:04:31Z","abstract_excerpt":"We present the photometric results of the eclipsing cataclysmic variable (CV) WZ Sge near the period minimum ($P_{min}$). Eight new mid-eclipse times were determined and the orbital ephemeris was updated. Our result shows that the orbital period of WZ Sge is decreasing at a rate of $\\dot{P}=-2.72(\\pm0.23)\\times{10^{-13}}\\,s s^{-1}$. This secular decrease, coupled with previous detection of its donor, suggest that WZ Sge is a pre-bounce system. Further analysis indicates that the observed period decrease rate is about $1.53$ times higher than pure gravitational radiation (GR) driving. We constr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.03155","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:44:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OjdPivpZmrl7nlqpJgnNgPkrhMyvDs1nE9yDYPP3LxAxSWdyvkOq0ffZA9cqf9fKUScrgV9TCv7i+36kGrRTBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:13:11.235792Z"},"content_sha256":"4a424c88ed044611ce75a5271f8c5c930662993b32504c549aba8711d0f9ccdb","schema_version":"1.0","event_id":"sha256:4a424c88ed044611ce75a5271f8c5c930662993b32504c549aba8711d0f9ccdb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XW27F34PIW5VPDXBLHV3BABWS7/bundle.json","state_url":"https://pith.science/pith/XW27F34PIW5VPDXBLHV3BABWS7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XW27F34PIW5VPDXBLHV3BABWS7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-26T13:13:11Z","links":{"resolver":"https://pith.science/pith/XW27F34PIW5VPDXBLHV3BABWS7","bundle":"https://pith.science/pith/XW27F34PIW5VPDXBLHV3BABWS7/bundle.json","state":"https://pith.science/pith/XW27F34PIW5VPDXBLHV3BABWS7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XW27F34PIW5VPDXBLHV3BABWS7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:XW27F34PIW5VPDXBLHV3BABWS7","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":"8bdf46c6f136a5be2b84fb8ecb0745e2f3b7ae8958166644d8de78c9127fe523","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-09T03:04:31Z","title_canon_sha256":"4fec075d758b31a1c69cc6ad8f34649770e99de167c9d6f02fddd753852f12df"},"schema_version":"1.0","source":{"id":"1705.03155","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.03155","created_at":"2026-05-18T00:44:22Z"},{"alias_kind":"arxiv_version","alias_value":"1705.03155v1","created_at":"2026-05-18T00:44:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.03155","created_at":"2026-05-18T00:44:22Z"},{"alias_kind":"pith_short_12","alias_value":"XW27F34PIW5V","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"XW27F34PIW5VPDXB","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"XW27F34P","created_at":"2026-05-18T12:31:56Z"}],"graph_snapshots":[{"event_id":"sha256:4a424c88ed044611ce75a5271f8c5c930662993b32504c549aba8711d0f9ccdb","target":"graph","created_at":"2026-05-18T00:44:22Z","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":"We present the photometric results of the eclipsing cataclysmic variable (CV) WZ Sge near the period minimum ($P_{min}$). Eight new mid-eclipse times were determined and the orbital ephemeris was updated. Our result shows that the orbital period of WZ Sge is decreasing at a rate of $\\dot{P}=-2.72(\\pm0.23)\\times{10^{-13}}\\,s s^{-1}$. This secular decrease, coupled with previous detection of its donor, suggest that WZ Sge is a pre-bounce system. Further analysis indicates that the observed period decrease rate is about $1.53$ times higher than pure gravitational radiation (GR) driving. We constr","authors_text":"Irina Voloshina, L.-Y. Zhu, S.-B. Qian, Z.-T. Han","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-09T03:04:31Z","title":"WZ Sge: an eclipsing cataclysmic variable evolving towards the period minimum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.03155","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:f144af973815cdda5ec46472dd1b7cedd309f418d8cd5602b71ad82e3309e6ca","target":"record","created_at":"2026-05-18T00:44:22Z","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":"8bdf46c6f136a5be2b84fb8ecb0745e2f3b7ae8958166644d8de78c9127fe523","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-09T03:04:31Z","title_canon_sha256":"4fec075d758b31a1c69cc6ad8f34649770e99de167c9d6f02fddd753852f12df"},"schema_version":"1.0","source":{"id":"1705.03155","kind":"arxiv","version":1}},"canonical_sha256":"bdb5f2ef8f45bb578ee159ebb0803697cffdcb96aac82e8a6ed840855783cd2a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bdb5f2ef8f45bb578ee159ebb0803697cffdcb96aac82e8a6ed840855783cd2a","first_computed_at":"2026-05-18T00:44:22.977006Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:44:22.977006Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fFCeN0+6wUh9h/F16RdPKEN/843TH/jjP8qQ+eVqqVg/qosChbekCh03ApWNPtu7qrs8P9JwYrLPOn8SHQPYDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:44:22.977483Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.03155","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f144af973815cdda5ec46472dd1b7cedd309f418d8cd5602b71ad82e3309e6ca","sha256:4a424c88ed044611ce75a5271f8c5c930662993b32504c549aba8711d0f9ccdb"],"state_sha256":"4cb2438d0149a6255d1fea1a1267818613ce7ab84053f3d3fdad844f94401f0d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lzPS6wNOk+vVDYwwwl6o5juagtL3h2eZ86oF12VKNNNEbZg/DJEJu+UpCfzA9HXm+nG0jbnDgHOj0Q19reYECg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T13:13:11.239396Z","bundle_sha256":"5c081f03d2248b7e733a9806c1fbb97ce7e3f8e4bbe3e5e159a056dab28b0124"}}