{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:BQBOJYTB2L6SVKXMAZPHPF2MRF","short_pith_number":"pith:BQBOJYTB","canonical_record":{"source":{"id":"2505.06089","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-05-09T14:34:24Z","cross_cats_sorted":[],"title_canon_sha256":"0f622af89ef8f0a42ce562929bae249a0560ab45b8d6b3d9ad8a9b072520b053","abstract_canon_sha256":"6a6a5953977c815696b7c33f58c47a62940e2c263367efb1cf888980601a15c6"},"schema_version":"1.0"},"canonical_sha256":"0c02e4e261d2fd2aaaec065e77974c897966f0926cd3f550e32fc30483baec49","source":{"kind":"arxiv","id":"2505.06089","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.06089","created_at":"2026-07-05T11:00:53Z"},{"alias_kind":"arxiv_version","alias_value":"2505.06089v1","created_at":"2026-07-05T11:00:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.06089","created_at":"2026-07-05T11:00:53Z"},{"alias_kind":"pith_short_12","alias_value":"BQBOJYTB2L6S","created_at":"2026-07-05T11:00:53Z"},{"alias_kind":"pith_short_16","alias_value":"BQBOJYTB2L6SVKXM","created_at":"2026-07-05T11:00:53Z"},{"alias_kind":"pith_short_8","alias_value":"BQBOJYTB","created_at":"2026-07-05T11:00:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:BQBOJYTB2L6SVKXMAZPHPF2MRF","target":"record","payload":{"canonical_record":{"source":{"id":"2505.06089","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-05-09T14:34:24Z","cross_cats_sorted":[],"title_canon_sha256":"0f622af89ef8f0a42ce562929bae249a0560ab45b8d6b3d9ad8a9b072520b053","abstract_canon_sha256":"6a6a5953977c815696b7c33f58c47a62940e2c263367efb1cf888980601a15c6"},"schema_version":"1.0"},"canonical_sha256":"0c02e4e261d2fd2aaaec065e77974c897966f0926cd3f550e32fc30483baec49","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:00:53.739509Z","signature_b64":"DrWtk/4wwEJj3l0HqXHKrKeXi5elhfqiFRK99UPjLd6bgj9+UCaCwSrqSipnxI8e9EI5vwyvxiiOqYRImdTVDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0c02e4e261d2fd2aaaec065e77974c897966f0926cd3f550e32fc30483baec49","last_reissued_at":"2026-07-05T11:00:53.739078Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:00:53.739078Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2505.06089","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":"2026-07-05T11:00:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7LVBwYtLXMdFaZjek2Vq9b4ENziekhvgm2CV3GzDmSSqrYFXyYW3C8bIVTl/riMNQczcAehOtEf4W2Q8U69tBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T08:57:57.095799Z"},"content_sha256":"0ff23050726f2097d88e7ecdddeddddc77e8984047ecb6a92007d34239967bc6","schema_version":"1.0","event_id":"sha256:0ff23050726f2097d88e7ecdddeddddc77e8984047ecb6a92007d34239967bc6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:BQBOJYTB2L6SVKXMAZPHPF2MRF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Serendipitous discovery of a spiral host in a 2 Mpc double-double lobed radio galaxy","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Agnieszka Ku\\'zmicz, Dominika Hunik, Marek Jamrozy, Sagar Sethi","submitted_at":"2025-05-09T14:34:24Z","abstract_excerpt":"We present the serendipitous discovery of a double-double radio galaxy (DDRG) with a projected linear size exceeding 2 Mpc, hosted by a spiral galaxy. This unique combination of a giant radio structure and a spiral host challenges the prevailing view that such extreme radio sources reside only in elliptical galaxies. Using high-resolution optical imaging from the DESI Legacy Imaging Survey (DR10), we confirm a spiral-arm feature and a disk-component in the surface brightness profile fitting for the host galaxy (LEDA 896325) having a black hole of mass 2.4 $\\times$ 10$^8$ $\\rm M_{\\odot}$. Radio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.06089","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2505.06089/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":"2026-07-05T11:00:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EA1vjXmAjWRYQX6qxr95PNzM4SlcqP/40QLMiPxOG1or01YbdBRmVrVJpC26IA/RM7oCVrrv/2NASzJDqgI9Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T08:57:57.096845Z"},"content_sha256":"ebb83724f2392b3b69a1098388c9e482b6b2a8313368ac935fe15420ec1c052c","schema_version":"1.0","event_id":"sha256:ebb83724f2392b3b69a1098388c9e482b6b2a8313368ac935fe15420ec1c052c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BQBOJYTB2L6SVKXMAZPHPF2MRF/bundle.json","state_url":"https://pith.science/pith/BQBOJYTB2L6SVKXMAZPHPF2MRF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BQBOJYTB2L6SVKXMAZPHPF2MRF/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":"2026-08-19T08:57:57Z","links":{"resolver":"https://pith.science/pith/BQBOJYTB2L6SVKXMAZPHPF2MRF","bundle":"https://pith.science/pith/BQBOJYTB2L6SVKXMAZPHPF2MRF/bundle.json","state":"https://pith.science/pith/BQBOJYTB2L6SVKXMAZPHPF2MRF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BQBOJYTB2L6SVKXMAZPHPF2MRF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:BQBOJYTB2L6SVKXMAZPHPF2MRF","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":"6a6a5953977c815696b7c33f58c47a62940e2c263367efb1cf888980601a15c6","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-05-09T14:34:24Z","title_canon_sha256":"0f622af89ef8f0a42ce562929bae249a0560ab45b8d6b3d9ad8a9b072520b053"},"schema_version":"1.0","source":{"id":"2505.06089","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.06089","created_at":"2026-07-05T11:00:53Z"},{"alias_kind":"arxiv_version","alias_value":"2505.06089v1","created_at":"2026-07-05T11:00:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.06089","created_at":"2026-07-05T11:00:53Z"},{"alias_kind":"pith_short_12","alias_value":"BQBOJYTB2L6S","created_at":"2026-07-05T11:00:53Z"},{"alias_kind":"pith_short_16","alias_value":"BQBOJYTB2L6SVKXM","created_at":"2026-07-05T11:00:53Z"},{"alias_kind":"pith_short_8","alias_value":"BQBOJYTB","created_at":"2026-07-05T11:00:53Z"}],"graph_snapshots":[{"event_id":"sha256:ebb83724f2392b3b69a1098388c9e482b6b2a8313368ac935fe15420ec1c052c","target":"graph","created_at":"2026-07-05T11:00:53Z","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/2505.06089/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the serendipitous discovery of a double-double radio galaxy (DDRG) with a projected linear size exceeding 2 Mpc, hosted by a spiral galaxy. This unique combination of a giant radio structure and a spiral host challenges the prevailing view that such extreme radio sources reside only in elliptical galaxies. Using high-resolution optical imaging from the DESI Legacy Imaging Survey (DR10), we confirm a spiral-arm feature and a disk-component in the surface brightness profile fitting for the host galaxy (LEDA 896325) having a black hole of mass 2.4 $\\times$ 10$^8$ $\\rm M_{\\odot}$. Radio","authors_text":"Agnieszka Ku\\'zmicz, Dominika Hunik, Marek Jamrozy, Sagar Sethi","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-05-09T14:34:24Z","title":"Serendipitous discovery of a spiral host in a 2 Mpc double-double lobed radio galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.06089","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":"sha256:0ff23050726f2097d88e7ecdddeddddc77e8984047ecb6a92007d34239967bc6","target":"record","created_at":"2026-07-05T11:00:53Z","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":"6a6a5953977c815696b7c33f58c47a62940e2c263367efb1cf888980601a15c6","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-05-09T14:34:24Z","title_canon_sha256":"0f622af89ef8f0a42ce562929bae249a0560ab45b8d6b3d9ad8a9b072520b053"},"schema_version":"1.0","source":{"id":"2505.06089","kind":"arxiv","version":1}},"canonical_sha256":"0c02e4e261d2fd2aaaec065e77974c897966f0926cd3f550e32fc30483baec49","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c02e4e261d2fd2aaaec065e77974c897966f0926cd3f550e32fc30483baec49","first_computed_at":"2026-07-05T11:00:53.739078Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:00:53.739078Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DrWtk/4wwEJj3l0HqXHKrKeXi5elhfqiFRK99UPjLd6bgj9+UCaCwSrqSipnxI8e9EI5vwyvxiiOqYRImdTVDA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:00:53.739509Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.06089","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0ff23050726f2097d88e7ecdddeddddc77e8984047ecb6a92007d34239967bc6","sha256:ebb83724f2392b3b69a1098388c9e482b6b2a8313368ac935fe15420ec1c052c"],"state_sha256":"204772136f22fb6a6322bb7db6d32b4bb4f04a40bb97fbf3bc43e4fd76200663"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B6XuwPSxQAbnhTGQBEKjOteMcd8RC8z2753Ukh+rPNmJS9RojNdmTrDGyM9syw1Z91unDPRT4n2o0lvlje3+Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T08:57:57.102686Z","bundle_sha256":"64b101776d889f25c9eaa9697d397e2b38b644de3685655e98a560da1ebc37ec"}}