{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:7CK2BBG6AAAIDKVYTLCA2IIVET","short_pith_number":"pith:7CK2BBG6","canonical_record":{"source":{"id":"2206.06176","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2022-06-13T14:04:22Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"200d78d299dc49e2188811a99f99974d944951ed27ac001497813817808af720","abstract_canon_sha256":"3b172d052a7e58e56d2443c13b86e09976014ff4e8c8fb6b5822453e68e23952"},"schema_version":"1.0"},"canonical_sha256":"f895a084de000081aab89ac40d211524d12299ec0b798baf1261871394881d9e","source":{"kind":"arxiv","id":"2206.06176","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2206.06176","created_at":"2026-07-05T04:45:22Z"},{"alias_kind":"arxiv_version","alias_value":"2206.06176v1","created_at":"2026-07-05T04:45:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2206.06176","created_at":"2026-07-05T04:45:22Z"},{"alias_kind":"pith_short_12","alias_value":"7CK2BBG6AAAI","created_at":"2026-07-05T04:45:22Z"},{"alias_kind":"pith_short_16","alias_value":"7CK2BBG6AAAIDKVY","created_at":"2026-07-05T04:45:22Z"},{"alias_kind":"pith_short_8","alias_value":"7CK2BBG6","created_at":"2026-07-05T04:45:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:7CK2BBG6AAAIDKVYTLCA2IIVET","target":"record","payload":{"canonical_record":{"source":{"id":"2206.06176","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2022-06-13T14:04:22Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"200d78d299dc49e2188811a99f99974d944951ed27ac001497813817808af720","abstract_canon_sha256":"3b172d052a7e58e56d2443c13b86e09976014ff4e8c8fb6b5822453e68e23952"},"schema_version":"1.0"},"canonical_sha256":"f895a084de000081aab89ac40d211524d12299ec0b798baf1261871394881d9e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:45:22.969441Z","signature_b64":"ciQ9vGsG2isobMn30PR3f9fs1ez5QxOMLjxRMGkxdL/pMS6wrumPyJlKJYDIaAFmxAT7B5AiHTQ5IBGwCDScAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f895a084de000081aab89ac40d211524d12299ec0b798baf1261871394881d9e","last_reissued_at":"2026-07-05T04:45:22.969031Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:45:22.969031Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2206.06176","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":"2026-07-05T04:45:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UmSzXHzMk2t8wTdcQWUTfG5cNYDuCzotnPGpJn1Bc6aMBit2CQLHZixMa57Rlduv6BzIzchl//v128SUlSM5Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-24T03:56:53.353240Z"},"content_sha256":"4bda9437012efcd911ed7cf5ea50c36fcfcb6687e33ef624d64009b70068c098","schema_version":"1.0","event_id":"sha256:4bda9437012efcd911ed7cf5ea50c36fcfcb6687e33ef624d64009b70068c098"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:7CK2BBG6AAAIDKVYTLCA2IIVET","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A candle in the wind: a radio filament in the core of the A3562 galaxy cluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"D. Dallacasa, G. Bernardi, H. Bourdin, M. Markevitch, O. Smirnov, P. Mazzotta, P. Merluzzi, S. Bardelli, S. Giacintucci, S. P. Sikhosana, T. Venturi","submitted_at":"2022-06-13T14:04:22Z","abstract_excerpt":"Using a MeerKAT observation of the galaxy cluster A3562 (a member of the Shapley Supercluster), we have discovered a narrow, long and straight, very faint radio filament, which branches out at a straight angle from the tail of a radio galaxy located in projection near the core of the cluster. The radio filament spans 200 kpc and aligns with a sloshing cold front seen in the X-rays, staying inside the front in projection. The radio spectral index along the filament appears uniform (within large uncertainties) at $\\alpha\\simeq -1.5$. We propose that the radio galaxy is located outside the cold f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2206.06176","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/2206.06176/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":"2026-07-05T04:45:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M4ADoP+dAwQ4ImSL00gsEFQSzFEyrB7ZfNYISWjH8GVVBojj4SEtPPuElMY3TJG5uGw+LYEkBYxD6mwhFEnoAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-24T03:56:53.353618Z"},"content_sha256":"698ae7127845aed490d3de28bc3bfe73fcbc3a8e9fb54757589c8f0c9f0c8e01","schema_version":"1.0","event_id":"sha256:698ae7127845aed490d3de28bc3bfe73fcbc3a8e9fb54757589c8f0c9f0c8e01"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7CK2BBG6AAAIDKVYTLCA2IIVET/bundle.json","state_url":"https://pith.science/pith/7CK2BBG6AAAIDKVYTLCA2IIVET/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7CK2BBG6AAAIDKVYTLCA2IIVET/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":"2026-07-24T03:56:53Z","links":{"resolver":"https://pith.science/pith/7CK2BBG6AAAIDKVYTLCA2IIVET","bundle":"https://pith.science/pith/7CK2BBG6AAAIDKVYTLCA2IIVET/bundle.json","state":"https://pith.science/pith/7CK2BBG6AAAIDKVYTLCA2IIVET/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7CK2BBG6AAAIDKVYTLCA2IIVET/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:7CK2BBG6AAAIDKVYTLCA2IIVET","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":"3b172d052a7e58e56d2443c13b86e09976014ff4e8c8fb6b5822453e68e23952","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2022-06-13T14:04:22Z","title_canon_sha256":"200d78d299dc49e2188811a99f99974d944951ed27ac001497813817808af720"},"schema_version":"1.0","source":{"id":"2206.06176","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2206.06176","created_at":"2026-07-05T04:45:22Z"},{"alias_kind":"arxiv_version","alias_value":"2206.06176v1","created_at":"2026-07-05T04:45:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2206.06176","created_at":"2026-07-05T04:45:22Z"},{"alias_kind":"pith_short_12","alias_value":"7CK2BBG6AAAI","created_at":"2026-07-05T04:45:22Z"},{"alias_kind":"pith_short_16","alias_value":"7CK2BBG6AAAIDKVY","created_at":"2026-07-05T04:45:22Z"},{"alias_kind":"pith_short_8","alias_value":"7CK2BBG6","created_at":"2026-07-05T04:45:22Z"}],"graph_snapshots":[{"event_id":"sha256:698ae7127845aed490d3de28bc3bfe73fcbc3a8e9fb54757589c8f0c9f0c8e01","target":"graph","created_at":"2026-07-05T04:45:22Z","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/2206.06176/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Using a MeerKAT observation of the galaxy cluster A3562 (a member of the Shapley Supercluster), we have discovered a narrow, long and straight, very faint radio filament, which branches out at a straight angle from the tail of a radio galaxy located in projection near the core of the cluster. The radio filament spans 200 kpc and aligns with a sloshing cold front seen in the X-rays, staying inside the front in projection. The radio spectral index along the filament appears uniform (within large uncertainties) at $\\alpha\\simeq -1.5$. We propose that the radio galaxy is located outside the cold f","authors_text":"D. Dallacasa, G. Bernardi, H. Bourdin, M. Markevitch, O. Smirnov, P. Mazzotta, P. Merluzzi, S. Bardelli, S. Giacintucci, S. P. Sikhosana, T. Venturi","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2022-06-13T14:04:22Z","title":"A candle in the wind: a radio filament in the core of the A3562 galaxy cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2206.06176","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":"sha256:4bda9437012efcd911ed7cf5ea50c36fcfcb6687e33ef624d64009b70068c098","target":"record","created_at":"2026-07-05T04:45:22Z","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":"3b172d052a7e58e56d2443c13b86e09976014ff4e8c8fb6b5822453e68e23952","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2022-06-13T14:04:22Z","title_canon_sha256":"200d78d299dc49e2188811a99f99974d944951ed27ac001497813817808af720"},"schema_version":"1.0","source":{"id":"2206.06176","kind":"arxiv","version":1}},"canonical_sha256":"f895a084de000081aab89ac40d211524d12299ec0b798baf1261871394881d9e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f895a084de000081aab89ac40d211524d12299ec0b798baf1261871394881d9e","first_computed_at":"2026-07-05T04:45:22.969031Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:45:22.969031Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ciQ9vGsG2isobMn30PR3f9fs1ez5QxOMLjxRMGkxdL/pMS6wrumPyJlKJYDIaAFmxAT7B5AiHTQ5IBGwCDScAg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:45:22.969441Z","signed_message":"canonical_sha256_bytes"},"source_id":"2206.06176","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4bda9437012efcd911ed7cf5ea50c36fcfcb6687e33ef624d64009b70068c098","sha256:698ae7127845aed490d3de28bc3bfe73fcbc3a8e9fb54757589c8f0c9f0c8e01"],"state_sha256":"319c0c1b7928b75a8c962eb54abe03aa183c54b77496553572b56a5b77c88da3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OI1ilLUH7e3LVQnUPgukJL3Le0NEXWDOXnjrx57w4u41GIln8EZJlIHfMk27a3zejJLL0TarrPvB7dSJ5wsRAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-24T03:56:53.355745Z","bundle_sha256":"3e47c8100722578376089ddb51c08e56096096431f127f3d3e2de0ea4b4ee268"}}