{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IJZZGZUPFHLX4MAM2VBGN6ZJJU","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":"d2286d43e49e1cad9e2a41b20c330fc840dd9e3d07c3710ef8cb18a601f8b8a6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-14T16:58:28Z","title_canon_sha256":"626f6044e723eacffdf532a890f7e8f3b259e28d6718a7599cba907a4901a3e5"},"schema_version":"1.0","source":{"id":"1507.03926","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.03926","created_at":"2026-05-18T01:34:47Z"},{"alias_kind":"arxiv_version","alias_value":"1507.03926v1","created_at":"2026-05-18T01:34:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.03926","created_at":"2026-05-18T01:34:47Z"},{"alias_kind":"pith_short_12","alias_value":"IJZZGZUPFHLX","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IJZZGZUPFHLX4MAM","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IJZZGZUP","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:b083ad03d84a2a687ebeeb88f2664fe8632e150e43e585f8d74498570de157b9","target":"graph","created_at":"2026-05-18T01:34:47Z","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":"{\\it Kepler} satellite photometry and phase-resolved spectroscopy of the ultracompact AM CVn type binary SDSS J190817.07+394036.4 are presented. The average spectra reveal a variety of weak metal lines of different species, including silicon, sulphur and magnesium as well as many lines of nitrogen, beside the strong absorption lines of neutral helium. The phase-folded spectra and the Doppler tomograms reveal an S-wave in emission in the core of the He I 4471 \\AA\\,absorption line at a period of $P_{\\rm orb}=1085.7\\pm2.8$\\,sec identifying this as the orbital period of the system. The Si II, Mg I","authors_text":"D. Levitan, D. Steeghs, F. F\\\"urst, G. Nelemans, P. J. Groot, R. G. M. Rutten, S. Bloemen, S. Geier, T. A. Prince, T. Kupfer, T. R. Marsh","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-14T16:58:28Z","title":"Phase resolved spectroscopy and Kepler photometry of the ultracompact AM CVn binary SDSS J190817.07+394036.4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.03926","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:c411704f6ac091ac20a4fca1da5ef3578722d8f6919a0d1930542faae5e3bcc9","target":"record","created_at":"2026-05-18T01:34:47Z","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":"d2286d43e49e1cad9e2a41b20c330fc840dd9e3d07c3710ef8cb18a601f8b8a6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-14T16:58:28Z","title_canon_sha256":"626f6044e723eacffdf532a890f7e8f3b259e28d6718a7599cba907a4901a3e5"},"schema_version":"1.0","source":{"id":"1507.03926","kind":"arxiv","version":1}},"canonical_sha256":"427393668f29d77e300cd54266fb294d1dfd8010ecde4df6463138ab669a3a44","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"427393668f29d77e300cd54266fb294d1dfd8010ecde4df6463138ab669a3a44","first_computed_at":"2026-05-18T01:34:47.681755Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:34:47.681755Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B9vFZndsObEJZtC0PqQDaoauO9RWHDpwYVcFMmAH7Wtxk/kjJlxr5chONPXygRyD4fyqjE4Ok5+noHEHfnXbBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:34:47.682247Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.03926","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c411704f6ac091ac20a4fca1da5ef3578722d8f6919a0d1930542faae5e3bcc9","sha256:b083ad03d84a2a687ebeeb88f2664fe8632e150e43e585f8d74498570de157b9"],"state_sha256":"ade1a9ff77b50012373de66c64748848f0b416c3154fe1b18c34608cff87f58a"}