{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:4SZAOCLG7X6DNPRLACLH6YDWW5","short_pith_number":"pith:4SZAOCLG","canonical_record":{"source":{"id":"1007.0939","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-07-06T16:14:29Z","cross_cats_sorted":[],"title_canon_sha256":"c67fe1bee25025c033fc51d654c2f7a723b1a38dbb281b3fe660afce07832d7a","abstract_canon_sha256":"ccec080cfb60fd60096bd506c16aa62a9760db7787b1b32e334f588686b07078"},"schema_version":"1.0"},"canonical_sha256":"e4b2070966fdfc36be2b00967f6076b77e42dedaccf633f0f548131350ede3a8","source":{"kind":"arxiv","id":"1007.0939","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.0939","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"arxiv_version","alias_value":"1007.0939v1","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.0939","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"pith_short_12","alias_value":"4SZAOCLG7X6D","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"4SZAOCLG7X6DNPRL","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"4SZAOCLG","created_at":"2026-05-18T12:26:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:4SZAOCLG7X6DNPRLACLH6YDWW5","target":"record","payload":{"canonical_record":{"source":{"id":"1007.0939","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-07-06T16:14:29Z","cross_cats_sorted":[],"title_canon_sha256":"c67fe1bee25025c033fc51d654c2f7a723b1a38dbb281b3fe660afce07832d7a","abstract_canon_sha256":"ccec080cfb60fd60096bd506c16aa62a9760db7787b1b32e334f588686b07078"},"schema_version":"1.0"},"canonical_sha256":"e4b2070966fdfc36be2b00967f6076b77e42dedaccf633f0f548131350ede3a8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:06:31.952080Z","signature_b64":"uXHKGOelAbBW8RgzrCPB2w3hMpua7ui70Mv0urznt1snzbzrqCelmuFRCotM1bi7qYsvPlqzNPnikomoLl6gCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e4b2070966fdfc36be2b00967f6076b77e42dedaccf633f0f548131350ede3a8","last_reissued_at":"2026-05-18T02:06:31.951376Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:06:31.951376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1007.0939","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:06:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u+w7yUTzfKwXyplFkWdZ9J8siLoBOd/DXloT9EU+yGM027brh8oZaF2GlAr+GcCM13NxKB6S2XO+XR9OkEsxBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:07:52.253376Z"},"content_sha256":"319cbe6d9df7a175a49110424f9417dcccd42aac0d2c64323ff5d218c48e88bf","schema_version":"1.0","event_id":"sha256:319cbe6d9df7a175a49110424f9417dcccd42aac0d2c64323ff5d218c48e88bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:4SZAOCLG7X6DNPRLACLH6YDWW5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"IPHAS extinction distances to Planetary Nebulae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. A. Zijlstra, A. Mampaso, B. Miszalski, C. Giammanco, D. J. Frew, J. E. Drew, K. Viironen, L. Sabin, M. J. Barlow, M. Santander-Garc\\'ia, Q. A. Parker, R. Greimel, R. L. M. Corradi, R. Napiwotzki, S. E. Sale, S. Phillipps","submitted_at":"2010-07-06T16:14:29Z","abstract_excerpt":"The determination of reliable distances to Planetary Nebulae (PNe) is one of the major limitations in the study of this class of objects in the Galaxy. The availability of new photometric surveys such as IPHAS covering large portions of the sky gives us the opportunity to apply the \"extinction method\" to determine distances of a large number of objects. The technique is applied to a sample of 137 PNe located between -5 and 5 degrees in Galactic latitude, and between 29.52 and 215.49 degrees in longitude. The characteristics of the distance-extinction method and the main sources of errors are c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.0939","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:06:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/x3Ln503airjuSaSgCyJIWHUlpALecscXRaF32XDnmxAle2UH3ImeNsZW8Vs5T04tUJEiHCFb9ZtPFrPB2bvCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:07:52.254065Z"},"content_sha256":"416ceff4f73ed151e83444a559614f05ff25d66ac767a9a4aab2d992b672d6e7","schema_version":"1.0","event_id":"sha256:416ceff4f73ed151e83444a559614f05ff25d66ac767a9a4aab2d992b672d6e7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4SZAOCLG7X6DNPRLACLH6YDWW5/bundle.json","state_url":"https://pith.science/pith/4SZAOCLG7X6DNPRLACLH6YDWW5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4SZAOCLG7X6DNPRLACLH6YDWW5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T15:07:52Z","links":{"resolver":"https://pith.science/pith/4SZAOCLG7X6DNPRLACLH6YDWW5","bundle":"https://pith.science/pith/4SZAOCLG7X6DNPRLACLH6YDWW5/bundle.json","state":"https://pith.science/pith/4SZAOCLG7X6DNPRLACLH6YDWW5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4SZAOCLG7X6DNPRLACLH6YDWW5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:4SZAOCLG7X6DNPRLACLH6YDWW5","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":"ccec080cfb60fd60096bd506c16aa62a9760db7787b1b32e334f588686b07078","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-07-06T16:14:29Z","title_canon_sha256":"c67fe1bee25025c033fc51d654c2f7a723b1a38dbb281b3fe660afce07832d7a"},"schema_version":"1.0","source":{"id":"1007.0939","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.0939","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"arxiv_version","alias_value":"1007.0939v1","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.0939","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"pith_short_12","alias_value":"4SZAOCLG7X6D","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"4SZAOCLG7X6DNPRL","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"4SZAOCLG","created_at":"2026-05-18T12:26:04Z"}],"graph_snapshots":[{"event_id":"sha256:416ceff4f73ed151e83444a559614f05ff25d66ac767a9a4aab2d992b672d6e7","target":"graph","created_at":"2026-05-18T02:06:31Z","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":"The determination of reliable distances to Planetary Nebulae (PNe) is one of the major limitations in the study of this class of objects in the Galaxy. The availability of new photometric surveys such as IPHAS covering large portions of the sky gives us the opportunity to apply the \"extinction method\" to determine distances of a large number of objects. The technique is applied to a sample of 137 PNe located between -5 and 5 degrees in Galactic latitude, and between 29.52 and 215.49 degrees in longitude. The characteristics of the distance-extinction method and the main sources of errors are c","authors_text":"A. A. Zijlstra, A. Mampaso, B. Miszalski, C. Giammanco, D. J. Frew, J. E. Drew, K. Viironen, L. Sabin, M. J. Barlow, M. Santander-Garc\\'ia, Q. A. Parker, R. Greimel, R. L. M. Corradi, R. Napiwotzki, S. E. Sale, S. Phillipps","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-07-06T16:14:29Z","title":"IPHAS extinction distances to Planetary Nebulae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.0939","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":"sha256:319cbe6d9df7a175a49110424f9417dcccd42aac0d2c64323ff5d218c48e88bf","target":"record","created_at":"2026-05-18T02:06:31Z","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":"ccec080cfb60fd60096bd506c16aa62a9760db7787b1b32e334f588686b07078","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-07-06T16:14:29Z","title_canon_sha256":"c67fe1bee25025c033fc51d654c2f7a723b1a38dbb281b3fe660afce07832d7a"},"schema_version":"1.0","source":{"id":"1007.0939","kind":"arxiv","version":1}},"canonical_sha256":"e4b2070966fdfc36be2b00967f6076b77e42dedaccf633f0f548131350ede3a8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e4b2070966fdfc36be2b00967f6076b77e42dedaccf633f0f548131350ede3a8","first_computed_at":"2026-05-18T02:06:31.951376Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:06:31.951376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uXHKGOelAbBW8RgzrCPB2w3hMpua7ui70Mv0urznt1snzbzrqCelmuFRCotM1bi7qYsvPlqzNPnikomoLl6gCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:06:31.952080Z","signed_message":"canonical_sha256_bytes"},"source_id":"1007.0939","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:319cbe6d9df7a175a49110424f9417dcccd42aac0d2c64323ff5d218c48e88bf","sha256:416ceff4f73ed151e83444a559614f05ff25d66ac767a9a4aab2d992b672d6e7"],"state_sha256":"05c4fd6929c3acaf1ab6f40e21bad7e33570880b086363a78538daccc9f25b7b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z8rxmEH6WFj/WjyNMJstkN7EGKL4IP8xfUbnR0ZioTGtQ4Kzk2C+2aGZBltczO4tK5JRW4eRP2byYstnrJ1RBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T15:07:52.257494Z","bundle_sha256":"316220aff2642f62a47a8e1da722a7b0d81ff89797d9113d26538781c134a7c2"}}