{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:XG7JIRDFNSDYLJBDZSUBBAVCFP","short_pith_number":"pith:XG7JIRDF","canonical_record":{"source":{"id":"1401.7348","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-28T21:41:01Z","cross_cats_sorted":[],"title_canon_sha256":"8cf709c3cb46442fa1b58d36e39798c7bd2cd18810fffe74ad77a8c03a593a1b","abstract_canon_sha256":"e8770af23a1b7353ae5bc7651b641d018a60177038c3076489df9d9dbf25d69e"},"schema_version":"1.0"},"canonical_sha256":"b9be9444656c8785a423cca81082a22be803515c6cd8beb392228672fafc5657","source":{"kind":"arxiv","id":"1401.7348","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.7348","created_at":"2026-05-18T03:00:50Z"},{"alias_kind":"arxiv_version","alias_value":"1401.7348v1","created_at":"2026-05-18T03:00:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.7348","created_at":"2026-05-18T03:00:50Z"},{"alias_kind":"pith_short_12","alias_value":"XG7JIRDFNSDY","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"XG7JIRDFNSDYLJBD","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"XG7JIRDF","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:XG7JIRDFNSDYLJBDZSUBBAVCFP","target":"record","payload":{"canonical_record":{"source":{"id":"1401.7348","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-28T21:41:01Z","cross_cats_sorted":[],"title_canon_sha256":"8cf709c3cb46442fa1b58d36e39798c7bd2cd18810fffe74ad77a8c03a593a1b","abstract_canon_sha256":"e8770af23a1b7353ae5bc7651b641d018a60177038c3076489df9d9dbf25d69e"},"schema_version":"1.0"},"canonical_sha256":"b9be9444656c8785a423cca81082a22be803515c6cd8beb392228672fafc5657","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:00:50.148519Z","signature_b64":"/fniAnY6CCEvXPYkH0QAuep8ohLVVuyNTQWR4cK6O+diud7DDVe8E6yU/ginXucJITrHptgrcKhDhYRyjDg3AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b9be9444656c8785a423cca81082a22be803515c6cd8beb392228672fafc5657","last_reissued_at":"2026-05-18T03:00:50.147787Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:00:50.147787Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1401.7348","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":"2026-05-18T03:00:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1hoa132ETqRmXjQQsy4llX/cTkaXLa0pH6tQ/am7nAzAaZTrqRpST9HDuyz96AtZVSbIBB1ghooqEkwKnf1UAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T14:22:33.593223Z"},"content_sha256":"6e793b193b4e42581d679fdefe30bfb7eff7e5e7f04954c98a6f91886268969b","schema_version":"1.0","event_id":"sha256:6e793b193b4e42581d679fdefe30bfb7eff7e5e7f04954c98a6f91886268969b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:XG7JIRDFNSDYLJBDZSUBBAVCFP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A magnetic accretion switch in pre-cataclysmic binaries?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Boris Gaensicke, Cecilia Garraffo, Dai Takei, Jeremy J. Drake","submitted_at":"2014-01-28T21:41:01Z","abstract_excerpt":"We have investigated the mass accretion rate implied by published surface abundances of Si and C in the white dwarf component of the 3.62 hr period pre-cataclysmic binary and planet host candidate QS Vir (DA+M2-4). Diffusion timescales for gravitational settling imply $\\dot{M} \\sim 10^{-16}M_\\odot$ yr$^{-1}$ for the 1999 epoch of the observations, which is three orders of magnitude lower than measured from a 2006 {\\it XMM-Newton} observation. This is the first time that large accretion rate variations have been seen in a detached pre-CV. A third body in a 14 yr eccentric orbit suggested in a r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7348","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":"2026-05-18T03:00:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AeF2Zf3B3ZJFxK2Ro6pVOoat3PW7tsx4+l9tkwO0i27ks9kOzyGdTBjuwquMrMxmeBwZzTEP00Y13JXtRanHDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T14:22:33.593902Z"},"content_sha256":"b02ad8079dc0824597369b9ab2e5bab602722b160ee11defe8c0cbae4a4d9d63","schema_version":"1.0","event_id":"sha256:b02ad8079dc0824597369b9ab2e5bab602722b160ee11defe8c0cbae4a4d9d63"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XG7JIRDFNSDYLJBDZSUBBAVCFP/bundle.json","state_url":"https://pith.science/pith/XG7JIRDFNSDYLJBDZSUBBAVCFP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XG7JIRDFNSDYLJBDZSUBBAVCFP/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":"2026-06-06T14:22:33Z","links":{"resolver":"https://pith.science/pith/XG7JIRDFNSDYLJBDZSUBBAVCFP","bundle":"https://pith.science/pith/XG7JIRDFNSDYLJBDZSUBBAVCFP/bundle.json","state":"https://pith.science/pith/XG7JIRDFNSDYLJBDZSUBBAVCFP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XG7JIRDFNSDYLJBDZSUBBAVCFP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:XG7JIRDFNSDYLJBDZSUBBAVCFP","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":"e8770af23a1b7353ae5bc7651b641d018a60177038c3076489df9d9dbf25d69e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-28T21:41:01Z","title_canon_sha256":"8cf709c3cb46442fa1b58d36e39798c7bd2cd18810fffe74ad77a8c03a593a1b"},"schema_version":"1.0","source":{"id":"1401.7348","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.7348","created_at":"2026-05-18T03:00:50Z"},{"alias_kind":"arxiv_version","alias_value":"1401.7348v1","created_at":"2026-05-18T03:00:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.7348","created_at":"2026-05-18T03:00:50Z"},{"alias_kind":"pith_short_12","alias_value":"XG7JIRDFNSDY","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"XG7JIRDFNSDYLJBD","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"XG7JIRDF","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:b02ad8079dc0824597369b9ab2e5bab602722b160ee11defe8c0cbae4a4d9d63","target":"graph","created_at":"2026-05-18T03:00:50Z","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 have investigated the mass accretion rate implied by published surface abundances of Si and C in the white dwarf component of the 3.62 hr period pre-cataclysmic binary and planet host candidate QS Vir (DA+M2-4). Diffusion timescales for gravitational settling imply $\\dot{M} \\sim 10^{-16}M_\\odot$ yr$^{-1}$ for the 1999 epoch of the observations, which is three orders of magnitude lower than measured from a 2006 {\\it XMM-Newton} observation. This is the first time that large accretion rate variations have been seen in a detached pre-CV. A third body in a 14 yr eccentric orbit suggested in a r","authors_text":"Boris Gaensicke, Cecilia Garraffo, Dai Takei, Jeremy J. Drake","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-28T21:41:01Z","title":"A magnetic accretion switch in pre-cataclysmic binaries?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7348","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":"sha256:6e793b193b4e42581d679fdefe30bfb7eff7e5e7f04954c98a6f91886268969b","target":"record","created_at":"2026-05-18T03:00:50Z","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":"e8770af23a1b7353ae5bc7651b641d018a60177038c3076489df9d9dbf25d69e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-28T21:41:01Z","title_canon_sha256":"8cf709c3cb46442fa1b58d36e39798c7bd2cd18810fffe74ad77a8c03a593a1b"},"schema_version":"1.0","source":{"id":"1401.7348","kind":"arxiv","version":1}},"canonical_sha256":"b9be9444656c8785a423cca81082a22be803515c6cd8beb392228672fafc5657","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b9be9444656c8785a423cca81082a22be803515c6cd8beb392228672fafc5657","first_computed_at":"2026-05-18T03:00:50.147787Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:00:50.147787Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/fniAnY6CCEvXPYkH0QAuep8ohLVVuyNTQWR4cK6O+diud7DDVe8E6yU/ginXucJITrHptgrcKhDhYRyjDg3AA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:00:50.148519Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.7348","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6e793b193b4e42581d679fdefe30bfb7eff7e5e7f04954c98a6f91886268969b","sha256:b02ad8079dc0824597369b9ab2e5bab602722b160ee11defe8c0cbae4a4d9d63"],"state_sha256":"82cd900b73307485ad9604fa5ebc40e76f095baa2437a8e165a5eac442c752b3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xgTKtSrRXwT4+kI2SEkxXl5uL63k3r+o+py/NN4eaSiXnBd9gVgOeY54nXj6kE7BT3DExpIczsoCZmBnUdcNAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T14:22:33.597888Z","bundle_sha256":"b34ec26ef2e1bb6318560d160fbb93717e4694e556e5cee32fe922d7c7aed887"}}