{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:BGPQDUFAI7YWSRMBL35O5IQ6VC","short_pith_number":"pith:BGPQDUFA","canonical_record":{"source":{"id":"1907.03766","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-08T18:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"6843eb96e13c618739e4544c3094d8bbbe59a97477f28f0b299b327f2f2e94c3","abstract_canon_sha256":"c966f2d92686ec9301b96b632354ae4ed360b0abf79fc568ba9409559c2c2aea"},"schema_version":"1.0"},"canonical_sha256":"099f01d0a047f16945815efaeea21ea890cec949f12ccfc8207941ad6413aef4","source":{"kind":"arxiv","id":"1907.03766","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.03766","created_at":"2026-05-17T23:40:29Z"},{"alias_kind":"arxiv_version","alias_value":"1907.03766v1","created_at":"2026-05-17T23:40:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.03766","created_at":"2026-05-17T23:40:29Z"},{"alias_kind":"pith_short_12","alias_value":"BGPQDUFAI7YW","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"BGPQDUFAI7YWSRMB","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"BGPQDUFA","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:BGPQDUFAI7YWSRMBL35O5IQ6VC","target":"record","payload":{"canonical_record":{"source":{"id":"1907.03766","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-08T18:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"6843eb96e13c618739e4544c3094d8bbbe59a97477f28f0b299b327f2f2e94c3","abstract_canon_sha256":"c966f2d92686ec9301b96b632354ae4ed360b0abf79fc568ba9409559c2c2aea"},"schema_version":"1.0"},"canonical_sha256":"099f01d0a047f16945815efaeea21ea890cec949f12ccfc8207941ad6413aef4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:29.694291Z","signature_b64":"vIqbnmlJi9hz9aheXGp3UILjGDAi2J4Lr/zwC9r2zkLU6HbDnEkfxiN1gpF7qQtebyeS5sLDtJuyebEMRW0dCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"099f01d0a047f16945815efaeea21ea890cec949f12ccfc8207941ad6413aef4","last_reissued_at":"2026-05-17T23:40:29.693679Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:29.693679Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.03766","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":"2026-05-17T23:40:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iu/mjJvs+6fqqJPBxg4/LSCwkvY68FsOS9+RewE2MiPUVzXBDxvdRxlvXw+t5npJkWwCLQ15iYX4rNJWxZ5eDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:35:45.258376Z"},"content_sha256":"be398b7e238038a0d7eb947ccd773dc0474771a175eefa2b158a9972c56d10e1","schema_version":"1.0","event_id":"sha256:be398b7e238038a0d7eb947ccd773dc0474771a175eefa2b158a9972c56d10e1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:BGPQDUFAI7YWSRMBL35O5IQ6VC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gaia Data Release 2 Catalogue of Extremely-low Mass White Dwarf Candidates","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Ingrid Pelisoli, Joris Vos","submitted_at":"2019-07-08T18:00:03Z","abstract_excerpt":"Extremely-low mass white dwarf stars (ELMs) are M < 0.3 MSun helium-core white dwarfs born either as a result of a common-envelope phase or after a stable Roche-lobe overflow episode in a multiple system. The Universe is not old enough for ELMs to have formed through single-star evolution channels. As remnants of binary evolution, ELMs can shed light onto the poorly understood phase of common-envelope evolution and provide constraints to the physics of mass accretion. Most known ELMs will merge in less than a Hubble time, providing an important contribution to the signal to be detected by upco"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.03766","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":"2026-05-17T23:40:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4pzTAaYGOBkzJdSR0YaU+/CFQx4hH7+zqz52zL3ZIAaPLu76Zh+jW+RAc0vy2gYTDhz1A2G6i+kbOIMeRQNMDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:35:45.259118Z"},"content_sha256":"a1c1472adcbf2a2da1cab0e4519102b6f363dd2e2e3eadb8a5738ee1f66ffb56","schema_version":"1.0","event_id":"sha256:a1c1472adcbf2a2da1cab0e4519102b6f363dd2e2e3eadb8a5738ee1f66ffb56"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BGPQDUFAI7YWSRMBL35O5IQ6VC/bundle.json","state_url":"https://pith.science/pith/BGPQDUFAI7YWSRMBL35O5IQ6VC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BGPQDUFAI7YWSRMBL35O5IQ6VC/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":"2026-05-25T16:35:45Z","links":{"resolver":"https://pith.science/pith/BGPQDUFAI7YWSRMBL35O5IQ6VC","bundle":"https://pith.science/pith/BGPQDUFAI7YWSRMBL35O5IQ6VC/bundle.json","state":"https://pith.science/pith/BGPQDUFAI7YWSRMBL35O5IQ6VC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BGPQDUFAI7YWSRMBL35O5IQ6VC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:BGPQDUFAI7YWSRMBL35O5IQ6VC","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":"c966f2d92686ec9301b96b632354ae4ed360b0abf79fc568ba9409559c2c2aea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-08T18:00:03Z","title_canon_sha256":"6843eb96e13c618739e4544c3094d8bbbe59a97477f28f0b299b327f2f2e94c3"},"schema_version":"1.0","source":{"id":"1907.03766","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.03766","created_at":"2026-05-17T23:40:29Z"},{"alias_kind":"arxiv_version","alias_value":"1907.03766v1","created_at":"2026-05-17T23:40:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.03766","created_at":"2026-05-17T23:40:29Z"},{"alias_kind":"pith_short_12","alias_value":"BGPQDUFAI7YW","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"BGPQDUFAI7YWSRMB","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"BGPQDUFA","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:a1c1472adcbf2a2da1cab0e4519102b6f363dd2e2e3eadb8a5738ee1f66ffb56","target":"graph","created_at":"2026-05-17T23:40:29Z","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":"Extremely-low mass white dwarf stars (ELMs) are M < 0.3 MSun helium-core white dwarfs born either as a result of a common-envelope phase or after a stable Roche-lobe overflow episode in a multiple system. The Universe is not old enough for ELMs to have formed through single-star evolution channels. As remnants of binary evolution, ELMs can shed light onto the poorly understood phase of common-envelope evolution and provide constraints to the physics of mass accretion. Most known ELMs will merge in less than a Hubble time, providing an important contribution to the signal to be detected by upco","authors_text":"Ingrid Pelisoli, Joris Vos","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-08T18:00:03Z","title":"Gaia Data Release 2 Catalogue of Extremely-low Mass White Dwarf Candidates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.03766","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:be398b7e238038a0d7eb947ccd773dc0474771a175eefa2b158a9972c56d10e1","target":"record","created_at":"2026-05-17T23:40:29Z","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":"c966f2d92686ec9301b96b632354ae4ed360b0abf79fc568ba9409559c2c2aea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-08T18:00:03Z","title_canon_sha256":"6843eb96e13c618739e4544c3094d8bbbe59a97477f28f0b299b327f2f2e94c3"},"schema_version":"1.0","source":{"id":"1907.03766","kind":"arxiv","version":1}},"canonical_sha256":"099f01d0a047f16945815efaeea21ea890cec949f12ccfc8207941ad6413aef4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"099f01d0a047f16945815efaeea21ea890cec949f12ccfc8207941ad6413aef4","first_computed_at":"2026-05-17T23:40:29.693679Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:29.693679Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vIqbnmlJi9hz9aheXGp3UILjGDAi2J4Lr/zwC9r2zkLU6HbDnEkfxiN1gpF7qQtebyeS5sLDtJuyebEMRW0dCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:29.694291Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.03766","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be398b7e238038a0d7eb947ccd773dc0474771a175eefa2b158a9972c56d10e1","sha256:a1c1472adcbf2a2da1cab0e4519102b6f363dd2e2e3eadb8a5738ee1f66ffb56"],"state_sha256":"9a8d6f27ded5a5ab3f7f8865f649cbd2a651d176984c8c9b4f93d959618fdd4c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xjda2zazehr7n4xnRo9uy46fdD+gSR0biFPukRqlI526dGS8Vy7Ti38rM4OvCJI7JSQw8jrJ00upNdPora2jBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:35:45.262866Z","bundle_sha256":"c233643d99cb6e58a91b511ee9e59dbd1112e7897782289ea773ad18f905f433"}}