{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:24EYRRUVDG64LDIG27F7QQCWHO","short_pith_number":"pith:24EYRRUV","canonical_record":{"source":{"id":"2507.15834","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-07-21T17:44:19Z","cross_cats_sorted":[],"title_canon_sha256":"4d38c95756becddbc18dc9f8d00c34379b805d5f2bb71e015ebd5c4375851b32","abstract_canon_sha256":"97b713a37dabbe433dbd619fe99a0d2aca3f836d64c5df89b6ec0bb421ae12b5"},"schema_version":"1.0"},"canonical_sha256":"d70988c69519bdc58d06d7cbf840563b93cabb21a1bab6f14458c088126319bd","source":{"kind":"arxiv","id":"2507.15834","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.15834","created_at":"2026-05-26T01:03:13Z"},{"alias_kind":"arxiv_version","alias_value":"2507.15834v2","created_at":"2026-05-26T01:03:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.15834","created_at":"2026-05-26T01:03:13Z"},{"alias_kind":"pith_short_12","alias_value":"24EYRRUVDG64","created_at":"2026-05-26T01:03:13Z"},{"alias_kind":"pith_short_16","alias_value":"24EYRRUVDG64LDIG","created_at":"2026-05-26T01:03:13Z"},{"alias_kind":"pith_short_8","alias_value":"24EYRRUV","created_at":"2026-05-26T01:03:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:24EYRRUVDG64LDIG27F7QQCWHO","target":"record","payload":{"canonical_record":{"source":{"id":"2507.15834","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-07-21T17:44:19Z","cross_cats_sorted":[],"title_canon_sha256":"4d38c95756becddbc18dc9f8d00c34379b805d5f2bb71e015ebd5c4375851b32","abstract_canon_sha256":"97b713a37dabbe433dbd619fe99a0d2aca3f836d64c5df89b6ec0bb421ae12b5"},"schema_version":"1.0"},"canonical_sha256":"d70988c69519bdc58d06d7cbf840563b93cabb21a1bab6f14458c088126319bd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-26T01:03:13.618559Z","signature_b64":"Ww1codGWpz38hpYbgI9OT0nXkipbyMtBazaIyEq7I2lf8oUHL/riUrwRLrjsftAOm6ifso+2gPoad5kbuhPCDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d70988c69519bdc58d06d7cbf840563b93cabb21a1bab6f14458c088126319bd","last_reissued_at":"2026-05-26T01:03:13.617586Z","signature_status":"signed_v1","first_computed_at":"2026-05-26T01:03:13.617586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.15834","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-26T01:03:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RwurLku0FOx0DPSLmlC7SaWa2VxoTNH05Kl+iSsMvfpCQnyIA08l52gy74QxmmtRfDLRRY/+thW3SObj8gMRDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:53:56.209033Z"},"content_sha256":"b04a4df8e7cde2bfc61c4a246b911ed310f09cc5eea5f0de551ddea0874a8eae","schema_version":"1.0","event_id":"sha256:b04a4df8e7cde2bfc61c4a246b911ed310f09cc5eea5f0de551ddea0874a8eae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:24EYRRUVDG64LDIG27F7QQCWHO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SDSO1 is a Shocked Ghost Planetary Nebula in Front of M 31","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alberto Noriega-Crespo, Biny Sebastian, Carl Bjork, Lewis McCallum, Marcel Dreschsler, Mark Petersen, Patrick Ogle, Patrick Sparkman, R. Michael Rich, Sendhil Chinnasamy, Steeve Body, Tarun Kottary, Tim Schaeffer, Xavier Strottner, Yann Sainty","submitted_at":"2025-07-21T17:44:19Z","abstract_excerpt":"We present new, deep narrowband imagery and discuss the nature of SDSO 1, the large [O III]-emitting nebula centered 1.5 degrees SE of M 31. We find strong evidence to support the hypothesis that SDSO 1 is unrelated to M 31 and is instead a faded, giant (D = 20 pc), ghost planetary nebula (GPN) expelled by the symbiotic WD binary star EG Andromedae. The associated 45-pc long turbulent tail, seen in projection in front of M 31, yields an estimated age of 400 kyr. The initial hypersonic velocity of 91 km/s drives a strong bow shock into the local interstellar medium and a reverse shock into the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.15834","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.15834/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-05-26T01:03:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ez0v0GJ15QweX999XaGQ/eWzIfev/cdreyx2g1LnrThzxp8AEtTUS0nNligDllrtazwWw6CChu63/1KLLM63Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:53:56.209834Z"},"content_sha256":"7ae4eb1d450a9d38c265e9e749e12055cf101476a95d4ba99c7ed08dcd5d8625","schema_version":"1.0","event_id":"sha256:7ae4eb1d450a9d38c265e9e749e12055cf101476a95d4ba99c7ed08dcd5d8625"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/24EYRRUVDG64LDIG27F7QQCWHO/bundle.json","state_url":"https://pith.science/pith/24EYRRUVDG64LDIG27F7QQCWHO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/24EYRRUVDG64LDIG27F7QQCWHO/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":"2026-05-26T21:53:56Z","links":{"resolver":"https://pith.science/pith/24EYRRUVDG64LDIG27F7QQCWHO","bundle":"https://pith.science/pith/24EYRRUVDG64LDIG27F7QQCWHO/bundle.json","state":"https://pith.science/pith/24EYRRUVDG64LDIG27F7QQCWHO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/24EYRRUVDG64LDIG27F7QQCWHO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:24EYRRUVDG64LDIG27F7QQCWHO","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":"97b713a37dabbe433dbd619fe99a0d2aca3f836d64c5df89b6ec0bb421ae12b5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-07-21T17:44:19Z","title_canon_sha256":"4d38c95756becddbc18dc9f8d00c34379b805d5f2bb71e015ebd5c4375851b32"},"schema_version":"1.0","source":{"id":"2507.15834","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.15834","created_at":"2026-05-26T01:03:13Z"},{"alias_kind":"arxiv_version","alias_value":"2507.15834v2","created_at":"2026-05-26T01:03:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.15834","created_at":"2026-05-26T01:03:13Z"},{"alias_kind":"pith_short_12","alias_value":"24EYRRUVDG64","created_at":"2026-05-26T01:03:13Z"},{"alias_kind":"pith_short_16","alias_value":"24EYRRUVDG64LDIG","created_at":"2026-05-26T01:03:13Z"},{"alias_kind":"pith_short_8","alias_value":"24EYRRUV","created_at":"2026-05-26T01:03:13Z"}],"graph_snapshots":[{"event_id":"sha256:7ae4eb1d450a9d38c265e9e749e12055cf101476a95d4ba99c7ed08dcd5d8625","target":"graph","created_at":"2026-05-26T01:03:13Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2507.15834/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present new, deep narrowband imagery and discuss the nature of SDSO 1, the large [O III]-emitting nebula centered 1.5 degrees SE of M 31. We find strong evidence to support the hypothesis that SDSO 1 is unrelated to M 31 and is instead a faded, giant (D = 20 pc), ghost planetary nebula (GPN) expelled by the symbiotic WD binary star EG Andromedae. The associated 45-pc long turbulent tail, seen in projection in front of M 31, yields an estimated age of 400 kyr. The initial hypersonic velocity of 91 km/s drives a strong bow shock into the local interstellar medium and a reverse shock into the ","authors_text":"Alberto Noriega-Crespo, Biny Sebastian, Carl Bjork, Lewis McCallum, Marcel Dreschsler, Mark Petersen, Patrick Ogle, Patrick Sparkman, R. Michael Rich, Sendhil Chinnasamy, Steeve Body, Tarun Kottary, Tim Schaeffer, Xavier Strottner, Yann Sainty","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-07-21T17:44:19Z","title":"SDSO1 is a Shocked Ghost Planetary Nebula in Front of M 31"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.15834","kind":"arxiv","version":2},"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:b04a4df8e7cde2bfc61c4a246b911ed310f09cc5eea5f0de551ddea0874a8eae","target":"record","created_at":"2026-05-26T01:03:13Z","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":"97b713a37dabbe433dbd619fe99a0d2aca3f836d64c5df89b6ec0bb421ae12b5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-07-21T17:44:19Z","title_canon_sha256":"4d38c95756becddbc18dc9f8d00c34379b805d5f2bb71e015ebd5c4375851b32"},"schema_version":"1.0","source":{"id":"2507.15834","kind":"arxiv","version":2}},"canonical_sha256":"d70988c69519bdc58d06d7cbf840563b93cabb21a1bab6f14458c088126319bd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d70988c69519bdc58d06d7cbf840563b93cabb21a1bab6f14458c088126319bd","first_computed_at":"2026-05-26T01:03:13.617586Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-26T01:03:13.617586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ww1codGWpz38hpYbgI9OT0nXkipbyMtBazaIyEq7I2lf8oUHL/riUrwRLrjsftAOm6ifso+2gPoad5kbuhPCDg==","signature_status":"signed_v1","signed_at":"2026-05-26T01:03:13.618559Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.15834","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b04a4df8e7cde2bfc61c4a246b911ed310f09cc5eea5f0de551ddea0874a8eae","sha256:7ae4eb1d450a9d38c265e9e749e12055cf101476a95d4ba99c7ed08dcd5d8625"],"state_sha256":"c9017757427b9fd956f177328e7a9cfe8a3ca83251bea51cb77a30db1118248b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KhjAyTEUXBP3dGcN7uM4Yb5+iwUiAGg6PaZkU3z0VALNdyd+hChL/D+B7sLbKYB/2La/3i+TQ5c4regrsoIWAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T21:53:56.214069Z","bundle_sha256":"3d60cd74ba4704c80260e1653eb3929980caf34b55275312524f69751152b9bb"}}