{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:CKITNBRG7267S4GC5CZPBY3PP3","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":"57dd3104109f5fcb221e057bca8ddf1b97b78724eaddceb0a459958e4eb3419b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-11-27T21:00:20Z","title_canon_sha256":"918311292e3fcab2576c361e1dfde51fa2a61d1b9ecddc2641f7f109c90fc80b"},"schema_version":"1.0","source":{"id":"1211.6439","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.6439","created_at":"2026-05-18T01:52:54Z"},{"alias_kind":"arxiv_version","alias_value":"1211.6439v1","created_at":"2026-05-18T01:52:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.6439","created_at":"2026-05-18T01:52:54Z"},{"alias_kind":"pith_short_12","alias_value":"CKITNBRG7267","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CKITNBRG7267S4GC","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CKITNBRG","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:7f6f82f76a6a901389a6a63d7e542271e01731b7d6bb892b5291b5e3d88d62f0","target":"graph","created_at":"2026-05-18T01:52:54Z","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 latest results from a spectroscopic survey designed to uncover the hidden population of AM Canum Venaticorum (AM CVn) binaries in the photometric database of the Sloan Digital Sky Survey (SDSS). We selected ~2000 candidates based on their photometric colours, a relatively small sample which is expected to contain the majority of all AM CVn binaries in the SDSS (expected to be ~50).\n  We present two new candidate AM CVn binaries discovered using this strategy: SDSS J104325.08+563258.1 and SDSS J173047.59+554518.5. We also present spectra of 29 new cataclysmic variables, 23 DQ whi","authors_text":"A. Rau, C. M. Copperwheat, D. Levitan, D. Steeghs, G. H. A. Roelofs, G. Nelemans, P. J. Carter, P. J. Groot, T.Kupfer, T. R. Marsh","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-11-27T21:00:20Z","title":"A search for the hidden population of AM CVn binaries in the Sloan Digital Sky Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.6439","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":"sha256:98d198f020616a1e20a4537265ccacb29becc0ae5b2cca0a4d04474b2ff81065","target":"record","created_at":"2026-05-18T01:52:54Z","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":"57dd3104109f5fcb221e057bca8ddf1b97b78724eaddceb0a459958e4eb3419b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-11-27T21:00:20Z","title_canon_sha256":"918311292e3fcab2576c361e1dfde51fa2a61d1b9ecddc2641f7f109c90fc80b"},"schema_version":"1.0","source":{"id":"1211.6439","kind":"arxiv","version":1}},"canonical_sha256":"1291368626febdf970c2e8b2f0e36f7ec12f119f5876f28e491af6ac7d5fd27d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1291368626febdf970c2e8b2f0e36f7ec12f119f5876f28e491af6ac7d5fd27d","first_computed_at":"2026-05-18T01:52:54.177717Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:54.177717Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d79LNIX8SDS5y4kvB42Fp6+8xEbzex5oyTrzYJJpjYqKTGW6BHrH9AJD1JSJYCye9xzvQI0APzoBn8chG2o+DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:54.178377Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.6439","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:98d198f020616a1e20a4537265ccacb29becc0ae5b2cca0a4d04474b2ff81065","sha256:7f6f82f76a6a901389a6a63d7e542271e01731b7d6bb892b5291b5e3d88d62f0"],"state_sha256":"606fe056d971f3d8a068c12efe030e79d8d7493897d5c2e51668f1b1efd6f595"}