{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:CNPEWBH2VGOLEHKU7QEQSV4MOX","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":"ca332994b6e0f02883185efbe4e1095f35b8b06b8d7adf79efd89ee38955dc95","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-02-11T04:34:39Z","title_canon_sha256":"ac58ce128e86db6f3e7fa31f2f090e971ec72eff33e2285a8f419d669a3c8aa7"},"schema_version":"1.0","source":{"id":"1402.2369","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.2369","created_at":"2026-05-18T01:44:45Z"},{"alias_kind":"arxiv_version","alias_value":"1402.2369v1","created_at":"2026-05-18T01:44:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.2369","created_at":"2026-05-18T01:44:45Z"},{"alias_kind":"pith_short_12","alias_value":"CNPEWBH2VGOL","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"CNPEWBH2VGOLEHKU","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"CNPEWBH2","created_at":"2026-05-18T12:28:22Z"}],"graph_snapshots":[{"event_id":"sha256:5571b24002aa3d52ce6045778e6dfb06ae312cc39eafdf24f2e6279641d32da1","target":"graph","created_at":"2026-05-18T01:44:45Z","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 report a multi-wavelength study of four new planetary nebula (PN) candidates selected from the INT/WFC Photometric Ha Survey of the Northern Galactic Plane (IPHAS) and Deep Sky Hunter (DSH) catalogues. We present mid-resolution optical spectra of these PNs. The PN status of our sample was confirmed by optical narrow-band images and mid-resolution spectra. Based on the locations of these objects in the log (Ha/[N II]) versus log (Ha/[S II]) diagnostic diagram, we conclude that these sources are evolved lowexcitation PNs. The optical and infrared appearances of these newly discovered PNs are ","authors_text":"Chih-Hao Hsia (Department of Physics, University of Hong Kong), Yong Zhang (Department of Physics","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-02-11T04:34:39Z","title":"Discovery of new low-excitation planetary nebulae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.2369","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:ee2036edc3bd0ca39f765f10fd0b90e9ec1fb51f7be2306cb6bfc80d8fcf9288","target":"record","created_at":"2026-05-18T01:44:45Z","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":"ca332994b6e0f02883185efbe4e1095f35b8b06b8d7adf79efd89ee38955dc95","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-02-11T04:34:39Z","title_canon_sha256":"ac58ce128e86db6f3e7fa31f2f090e971ec72eff33e2285a8f419d669a3c8aa7"},"schema_version":"1.0","source":{"id":"1402.2369","kind":"arxiv","version":1}},"canonical_sha256":"135e4b04faa99cb21d54fc0909578c75dcb815b3b33b49cebddd75ac2c0e7868","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"135e4b04faa99cb21d54fc0909578c75dcb815b3b33b49cebddd75ac2c0e7868","first_computed_at":"2026-05-18T01:44:45.558151Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:45.558151Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dnNJNmASh4xHNkq0Qgp+lMKMEgpeQuX03JBZuwpIC5WFsT3HHD3nvrLgyzJaB/G9uFo/A0rz20om+RGzclcqAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:45.558768Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.2369","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ee2036edc3bd0ca39f765f10fd0b90e9ec1fb51f7be2306cb6bfc80d8fcf9288","sha256:5571b24002aa3d52ce6045778e6dfb06ae312cc39eafdf24f2e6279641d32da1"],"state_sha256":"a169b62ea3109205b585f094b6afc33525fc983738b4b6561d449c84aa6507f3"}