{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:BIRIRX3TJ6R3STP6YUSZCT3S3Q","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":"1f782946d5f0ddb13b97cecd5858d9dfb365e42fecdb349f8d4143cebc18a137","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-08-03T17:06:07Z","title_canon_sha256":"7f768843e0946d215df5975f87897607e7e91651f9dd7d028bc0254c2a072c43"},"schema_version":"1.0","source":{"id":"1608.01258","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.01258","created_at":"2026-05-18T01:08:37Z"},{"alias_kind":"arxiv_version","alias_value":"1608.01258v1","created_at":"2026-05-18T01:08:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.01258","created_at":"2026-05-18T01:08:37Z"},{"alias_kind":"pith_short_12","alias_value":"BIRIRX3TJ6R3","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"BIRIRX3TJ6R3STP6","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"BIRIRX3T","created_at":"2026-05-18T12:30:07Z"}],"graph_snapshots":[{"event_id":"sha256:c95d612b184e6e46866a117e396dabdb85d7bc40f42b56cdc65fc2c25924fd63","target":"graph","created_at":"2026-05-18T01:08:37Z","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":"RWT 152 is one of the few known planetary nebulae with an sdO central star. We present subarcsecond red tunable filter Halpha imaging and intermediate-resolution, long-slit spectroscopy of RWT 152 obtained with OSIRIS/GTC with the goal of analyzing its properties. The Halpha image reveals a bipolar nebula with a bright equatorial region and multiple bubbles in the main lobes. A faint circular halo surrounds the main nebula. The nebular spectra reveal a very low-excitation nebula with weak emission lines from H^+, He^+, and double-ionized metals, and absence of emission lines from neutral and s","authors_text":"A. Aller, A. Ulla, E. Solano, L. F. Miranda, L. Olgu\\'in","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-08-03T17:06:07Z","title":"Observations of the planetary nebula RWT 152 with OSIRIS/GTC"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.01258","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":"sha256:2a491a8d694b9935261195af8088665895ea66f468e2a06256899348b458bad1","target":"record","created_at":"2026-05-18T01:08:37Z","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":"1f782946d5f0ddb13b97cecd5858d9dfb365e42fecdb349f8d4143cebc18a137","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-08-03T17:06:07Z","title_canon_sha256":"7f768843e0946d215df5975f87897607e7e91651f9dd7d028bc0254c2a072c43"},"schema_version":"1.0","source":{"id":"1608.01258","kind":"arxiv","version":1}},"canonical_sha256":"0a2288df734fa3b94dfec525914f72dc3b10a4f58c7c797ddf12ba2d9f894df7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0a2288df734fa3b94dfec525914f72dc3b10a4f58c7c797ddf12ba2d9f894df7","first_computed_at":"2026-05-18T01:08:37.711819Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:37.711819Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yFRlxcpa/88ogaUd33yNYh8gA5It4qXuChA6a0po3C/sjmhmfPoQI1RIIuUOG++qL159xgNXU5Kmw9K7t6RaDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:37.712446Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.01258","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a491a8d694b9935261195af8088665895ea66f468e2a06256899348b458bad1","sha256:c95d612b184e6e46866a117e396dabdb85d7bc40f42b56cdc65fc2c25924fd63"],"state_sha256":"2ca45fe5ac9bf079306b62ab0e0db42e6c8c2f2617d0f150d977dcacddebd826"}