{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BBOPQLLYZTMWJBO5YN4RJXJWEI","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":"25a831236a4367fdce2cafcae3a1afe0c073871aca8e6d714cbd3f4a38262f01","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-12T19:00:01Z","title_canon_sha256":"9844a04cfd03532d6d5f5471ddfab39ee7cc7056318f7db55ea2b37cce1318f8"},"schema_version":"1.0","source":{"id":"1801.04275","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.04275","created_at":"2026-05-18T00:21:04Z"},{"alias_kind":"arxiv_version","alias_value":"1801.04275v3","created_at":"2026-05-18T00:21:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.04275","created_at":"2026-05-18T00:21:04Z"},{"alias_kind":"pith_short_12","alias_value":"BBOPQLLYZTMW","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"BBOPQLLYZTMWJBO5","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"BBOPQLLY","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:96317ad5e60fe7d87f60b75aadafc65b1edcd1f6341d990d39098721086816ab","target":"graph","created_at":"2026-05-18T00:21:04Z","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 obtain new and precise information on the double white dwarf (DWD) population and on its gravitational-wave-driven merger rate, by combining the constraints on the DWD population from two previous radial-velocity-variation studies: One based on a sample of white dwarfs (WDs) from the Sloan Digital Sky Survey (SDSS, which with its low spectral resolution probes systems at separations a<0.05 au), and one based on the ESO-VLT Supernova-Ia Progenitor surveY (SPY, which, with high spectral resolution, is sensitive to a<4 au). From a joint likelihood analysis, the DWD fraction among WDs is fbin=0","authors_text":"Carles Badenes, Dan Maoz, Na'ama Hallakoun","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-12T19:00:01Z","title":"The separation distribution and merger rate of double white dwarfs: improved constraints"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.04275","kind":"arxiv","version":3},"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":"sha256:4d1d58d6cfb4f4ad2a9aded6cba9aef6df1263af54c1167354b67f333bd10cd9","target":"record","created_at":"2026-05-18T00:21:04Z","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":"25a831236a4367fdce2cafcae3a1afe0c073871aca8e6d714cbd3f4a38262f01","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-12T19:00:01Z","title_canon_sha256":"9844a04cfd03532d6d5f5471ddfab39ee7cc7056318f7db55ea2b37cce1318f8"},"schema_version":"1.0","source":{"id":"1801.04275","kind":"arxiv","version":3}},"canonical_sha256":"085cf82d78ccd96485ddc37914dd362233b5efb59980739f6f099fa94497b887","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"085cf82d78ccd96485ddc37914dd362233b5efb59980739f6f099fa94497b887","first_computed_at":"2026-05-18T00:21:04.327984Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:04.327984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mOR637r74hHp33lpCPax5tcFgwQbsctD3qiX5L4EnxYk9CZ/Nq73pvKd8AYpF9JOEpg9u2Ub8aFm2GGVQk1cAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:04.328447Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.04275","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d1d58d6cfb4f4ad2a9aded6cba9aef6df1263af54c1167354b67f333bd10cd9","sha256:96317ad5e60fe7d87f60b75aadafc65b1edcd1f6341d990d39098721086816ab"],"state_sha256":"93af935045266384ac20d7e14e3faa62f39d383edb482943eb4241334cede862"}