{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:D7KMRLM4QDATZR6FADQGI26Q2N","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":"70723aa30d1ed4201273e5a1890b31b47db4539e8cc7af361f17d0a98f3ba071","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-19T04:36:55Z","title_canon_sha256":"d4908e19272af48dd4a60aead2fd8a3b88629f9e902207721c33a0ce0ff997ee"},"schema_version":"1.0","source":{"id":"1106.3706","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.3706","created_at":"2026-05-18T04:19:42Z"},{"alias_kind":"arxiv_version","alias_value":"1106.3706v1","created_at":"2026-05-18T04:19:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.3706","created_at":"2026-05-18T04:19:42Z"},{"alias_kind":"pith_short_12","alias_value":"D7KMRLM4QDAT","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"D7KMRLM4QDATZR6F","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"D7KMRLM4","created_at":"2026-05-18T12:26:26Z"}],"graph_snapshots":[{"event_id":"sha256:b4ff86a58e008b6e0e32f2a0708aa129e77b3e77897cdb0d2f811a16c016efca","target":"graph","created_at":"2026-05-18T04:19:42Z","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":"Although the planetary nebula NGC 6781 appears to possess an elliptical morphology, its kinematic and emission characteristics are in many ways unusual, and it is possible that it may represent a bipolar source oriented close to the line of sight. We shall present deep imaging of this nebula in [O III], Ha and [N II], and using broad-band (F555W and F814W) filters. These were taken with the 2.56-m Nordic Optical Telescope and Hubble Space Telescope. This is combined with mid-infrared (MIR) imaging and spectroscopy acquired with the Spitzer Space Telescope (Spitzer), and near-infrared spectrosc","authors_text":"Gerardo Ramos-Larios, J. P. Phillips, Martin A. Guerrero","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-19T04:36:55Z","title":"Optical and Mid-Infrared Observations of the Planetary Nebula NGC 6781"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.3706","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":"sha256:4da3b10b620153895ff28e78258b983b9436c9bcea31b603edd7d09e1b58b129","target":"record","created_at":"2026-05-18T04:19:42Z","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":"70723aa30d1ed4201273e5a1890b31b47db4539e8cc7af361f17d0a98f3ba071","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-19T04:36:55Z","title_canon_sha256":"d4908e19272af48dd4a60aead2fd8a3b88629f9e902207721c33a0ce0ff997ee"},"schema_version":"1.0","source":{"id":"1106.3706","kind":"arxiv","version":1}},"canonical_sha256":"1fd4c8ad9c80c13cc7c500e0646bd0d37643441150c3a2b106c35f6c795ff733","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1fd4c8ad9c80c13cc7c500e0646bd0d37643441150c3a2b106c35f6c795ff733","first_computed_at":"2026-05-18T04:19:42.341072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:19:42.341072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OI2edT0UkLAiz32dqzav3IgY+sWh28yWo0Dp9pi5ABSvsULbxzg9d4YlgQndKkMdoWuDNPirOTjoPfqoGM0yBw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:19:42.341749Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.3706","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4da3b10b620153895ff28e78258b983b9436c9bcea31b603edd7d09e1b58b129","sha256:b4ff86a58e008b6e0e32f2a0708aa129e77b3e77897cdb0d2f811a16c016efca"],"state_sha256":"f2564aae5e1ffb4ec4363ca3475a133d9ea8355761fe07da35c2bdd6ba44b391"}