{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:3LPSGF77BVURR2JK2423AFTFWJ","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":"85e19e58538e02cf3416acefec76d37479af51020a6383040575e71bcc665a17","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-10-10T17:41:14Z","title_canon_sha256":"42ce8761a8e8299fa0fdddbfa231b93bf4370dcceb5fa95dccb274cd575dd4ef"},"schema_version":"1.0","source":{"id":"1810.04657","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.04657","created_at":"2026-05-18T00:02:30Z"},{"alias_kind":"arxiv_version","alias_value":"1810.04657v1","created_at":"2026-05-18T00:02:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.04657","created_at":"2026-05-18T00:02:30Z"},{"alias_kind":"pith_short_12","alias_value":"3LPSGF77BVUR","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"3LPSGF77BVURR2JK","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"3LPSGF77","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:29130872ed4c540a27f8fbb9759e0c5a743a58dfbd8816163ee4fb596a56e2ea","target":"graph","created_at":"2026-05-18T00:02:30Z","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":"Multiple long and variable transits caused by dust from possibly disintegrating asteroids were detected in light curves of WD 1145+017. We present time-resolved spectroscopic observations of this target with QUCAM CCDs mounted in the Intermediate dispersion Spectrograph and Imaging System at the 4.2-m William Herschel Telescope in two different spectral arms: the blue arm covering 3800-4025 {\\AA} and the red arm covering 7000-7430 {\\AA}. When comparing individual transits in both arms, our observations show with 20 {\\sigma} significance an evident colour difference between the in- and out-of-t","authors_text":"(2) School of Physical Sciences, 3), (3) Astrophysics Research Centre, Apartado de Correos, Belfast, Centre for Astrophysics, Dublin, Dublin City University, Ernst J.W. de Mooij (2, Glasnevin, Ireland, Marie Karjalainen (1), Neale P. Gibson (3) ((1) Isaac Newton Group of Telescopes, Physics, Queen's University Belfast, Raine Karjalainen (1), Relativity, Santa Cruz de La Palma, School of Mathematics, Spain, UK)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-10-10T17:41:14Z","title":"Time resolved spectroscopy of dust and gas from extrasolar planetesimals orbiting WD 1145+017"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.04657","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:ce4619d518f28d0147a265b15d248edb2d9759e4fcda4ba66621e60d50f49882","target":"record","created_at":"2026-05-18T00:02:30Z","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":"85e19e58538e02cf3416acefec76d37479af51020a6383040575e71bcc665a17","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-10-10T17:41:14Z","title_canon_sha256":"42ce8761a8e8299fa0fdddbfa231b93bf4370dcceb5fa95dccb274cd575dd4ef"},"schema_version":"1.0","source":{"id":"1810.04657","kind":"arxiv","version":1}},"canonical_sha256":"dadf2317ff0d6918e92ad735b01665b276c17e88fa02c5604ad071e775d4df2d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dadf2317ff0d6918e92ad735b01665b276c17e88fa02c5604ad071e775d4df2d","first_computed_at":"2026-05-18T00:02:30.277822Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:30.277822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4xTAvtCPv4lrdFXLoZjoUloPLjauwytCB7iSFR1hFMJyEJY03oZsSbSY5MWSPQlBUgNlRqgQmCAUpSjSmN/cDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:30.279644Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.04657","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce4619d518f28d0147a265b15d248edb2d9759e4fcda4ba66621e60d50f49882","sha256:29130872ed4c540a27f8fbb9759e0c5a743a58dfbd8816163ee4fb596a56e2ea"],"state_sha256":"dfd06c8317872098cf3a6c4b5e6143b9bc0e146df8a40d037d5db0794130fcaa"}