{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:43YN4K6ZBCFJMWBUH46QLO5RAM","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":"a4d9ef9a371727a10e99cc00159ac56f35e2ee1739c681fe575ea32fb5725fbc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-24T20:02:50Z","title_canon_sha256":"235d42c4df54ec9de9f8652ef6ddf47ef367c66ad5d59d18153c8f2f6e837488"},"schema_version":"1.0","source":{"id":"0909.4542","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.4542","created_at":"2026-05-18T02:34:27Z"},{"alias_kind":"arxiv_version","alias_value":"0909.4542v1","created_at":"2026-05-18T02:34:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.4542","created_at":"2026-05-18T02:34:27Z"},{"alias_kind":"pith_short_12","alias_value":"43YN4K6ZBCFJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"43YN4K6ZBCFJMWBU","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"43YN4K6Z","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:5833db24de98ff44db822dc164255cd5d5d83a56c53aa284a2fd5634fa73d393","target":"graph","created_at":"2026-05-18T02:34:27Z","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":"We present three new candidate AM CVn binaries, plus one confirmed new system, from a spectroscopic survey of color-selected objects from the Sloan Digital Sky Survey. All four systems were found from their helium emission lines in low-resolution spectra taken on the Hale telescope at Palomar, and the Nordic Optical Telescope and the William Herschel Telescope on La Palma.\n  The ultra-compact binary nature of SDSS J090221.35+381941.9 was confirmed using phase-resolved spectroscopy at the Keck-I telescope. From the characteristic radial velocity `S-wave' observed in the helium emission lines we","authors_text":"2), (2) Caltech, (3) CfA Harvard, (4) Radboud University Nijmegen, 5), (5) University of Warwick), Arne Rau (1, Danny Steeghs (3, Gijs H.A. Roelofs (3), Gijs Nelemans (4), Mansi M. Kasliwal (2) ((1) MPE Garching, Paul J. Groot (4), Tom R. Marsh (5)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-24T20:02:50Z","title":"A census of AM CVn stars: three new candidates and one confirmed 48.3-minute binary"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.4542","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":"sha256:6ea248767ad5dbd4c811a5921708b9fee8fc6f2bba5cc7e77b72647935612dd7","target":"record","created_at":"2026-05-18T02:34:27Z","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":"a4d9ef9a371727a10e99cc00159ac56f35e2ee1739c681fe575ea32fb5725fbc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-24T20:02:50Z","title_canon_sha256":"235d42c4df54ec9de9f8652ef6ddf47ef367c66ad5d59d18153c8f2f6e837488"},"schema_version":"1.0","source":{"id":"0909.4542","kind":"arxiv","version":1}},"canonical_sha256":"e6f0de2bd9088a9658343f3d05bbb1030550f9156cbb25365c02a8986c55aaab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e6f0de2bd9088a9658343f3d05bbb1030550f9156cbb25365c02a8986c55aaab","first_computed_at":"2026-05-18T02:34:27.722344Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:27.722344Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aKMgr8gWL8PyA4Tz1KKkbkksyE01Tyg5L5PAZAlYDWDMlli6+KkrhcoStBkP/DPIjSkAS+guG/Hnfxcto4uNBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:27.722945Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.4542","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6ea248767ad5dbd4c811a5921708b9fee8fc6f2bba5cc7e77b72647935612dd7","sha256:5833db24de98ff44db822dc164255cd5d5d83a56c53aa284a2fd5634fa73d393"],"state_sha256":"bf0edf3b40b6ed81f96735385d214b726a7970d1dd6636e3ae281a11e870c9ce"}