{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:5YKW2QGWIHA6N3E3P4FZRBMI6I","short_pith_number":"pith:5YKW2QGW","canonical_record":{"source":{"id":"1610.07875","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-10-25T13:51:50Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"b1eaef94479c0139605c7869a16de85a1d1777ef5b4b5f9ab48353f1b8b6e0bf","abstract_canon_sha256":"09c17686248e666fce2484e5226823f563fbb7206a62d19c607fc1cb5feb9777"},"schema_version":"1.0"},"canonical_sha256":"ee156d40d641c1e6ec9b7f0b988588f227a7f7cf05d289e65e11a262570b0d91","source":{"kind":"arxiv","id":"1610.07875","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.07875","created_at":"2026-05-18T00:52:38Z"},{"alias_kind":"arxiv_version","alias_value":"1610.07875v1","created_at":"2026-05-18T00:52:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.07875","created_at":"2026-05-18T00:52:38Z"},{"alias_kind":"pith_short_12","alias_value":"5YKW2QGWIHA6","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5YKW2QGWIHA6N3E3","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5YKW2QGW","created_at":"2026-05-18T12:30:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:5YKW2QGWIHA6N3E3P4FZRBMI6I","target":"record","payload":{"canonical_record":{"source":{"id":"1610.07875","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-10-25T13:51:50Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"b1eaef94479c0139605c7869a16de85a1d1777ef5b4b5f9ab48353f1b8b6e0bf","abstract_canon_sha256":"09c17686248e666fce2484e5226823f563fbb7206a62d19c607fc1cb5feb9777"},"schema_version":"1.0"},"canonical_sha256":"ee156d40d641c1e6ec9b7f0b988588f227a7f7cf05d289e65e11a262570b0d91","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:52:38.225746Z","signature_b64":"l1uGsmpFpGFWToLnyX3EZyheAdt7BuPRBIgeNJkisNh8Z03GWH3OAik5ahJZlGniscaTX96G6wX3JMH8wyuqCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ee156d40d641c1e6ec9b7f0b988588f227a7f7cf05d289e65e11a262570b0d91","last_reissued_at":"2026-05-18T00:52:38.225069Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:52:38.225069Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1610.07875","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":"2026-05-18T00:52:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Evl4P/I2UwLocXjNFLTZ+uqk2Z915A/cjr2hENzN4VFzOpbHDT8105bCIZYgFdi/o+27WrodNIkOQbUs4IAhDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:12:14.031604Z"},"content_sha256":"a60fdf29a61c40f763a9ffb408a8a0df6d9159e263515e181e65b75d70ab0a48","schema_version":"1.0","event_id":"sha256:a60fdf29a61c40f763a9ffb408a8a0df6d9159e263515e181e65b75d70ab0a48"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:5YKW2QGWIHA6N3E3P4FZRBMI6I","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mpc-scale diffuse radio emission in two massive cool-core clusters of galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Annalisa Bonafede, Arif Babul, Florian Pacaud, Frank Bertoldi, Huib Intema, Kaustuv Basu, Martin W. Sommer","submitted_at":"2016-10-25T13:51:50Z","abstract_excerpt":"Radio halos are diffuse synchrotron sources on scales of ~1 Mpc that are found in merging clusters of galaxies, and are believed to be powered by electrons re-accelerated by the merger-driven turbulence. We present measurements of extended radio emission on similarly large scales in two clusters of galaxies hosting cool cores: Abell 2390 and Abell 2261. The analysis is based on interferometric imaging with the JVLA, VLA and GMRT. We present detailed radio images of the targets, subtract the compact emission components, and measure the spectral indices for the diffuse components. The radio emis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.07875","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":"2026-05-18T00:52:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8yBoJYMey7dXwg7CyD7POXGOEYAt8pN2t0WdgXkOGImj+34M9aN6Eh+CPlMpZY3EcCgQg5yNJmrb0QRt5ioqBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:12:14.032023Z"},"content_sha256":"74ebf16e4ff8fba399c387c68a52cf09de0d9408c6b3dac450d0b50a6e7af5b3","schema_version":"1.0","event_id":"sha256:74ebf16e4ff8fba399c387c68a52cf09de0d9408c6b3dac450d0b50a6e7af5b3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5YKW2QGWIHA6N3E3P4FZRBMI6I/bundle.json","state_url":"https://pith.science/pith/5YKW2QGWIHA6N3E3P4FZRBMI6I/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5YKW2QGWIHA6N3E3P4FZRBMI6I/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":"2026-05-27T13:12:14Z","links":{"resolver":"https://pith.science/pith/5YKW2QGWIHA6N3E3P4FZRBMI6I","bundle":"https://pith.science/pith/5YKW2QGWIHA6N3E3P4FZRBMI6I/bundle.json","state":"https://pith.science/pith/5YKW2QGWIHA6N3E3P4FZRBMI6I/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5YKW2QGWIHA6N3E3P4FZRBMI6I/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:5YKW2QGWIHA6N3E3P4FZRBMI6I","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":"09c17686248e666fce2484e5226823f563fbb7206a62d19c607fc1cb5feb9777","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-10-25T13:51:50Z","title_canon_sha256":"b1eaef94479c0139605c7869a16de85a1d1777ef5b4b5f9ab48353f1b8b6e0bf"},"schema_version":"1.0","source":{"id":"1610.07875","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.07875","created_at":"2026-05-18T00:52:38Z"},{"alias_kind":"arxiv_version","alias_value":"1610.07875v1","created_at":"2026-05-18T00:52:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.07875","created_at":"2026-05-18T00:52:38Z"},{"alias_kind":"pith_short_12","alias_value":"5YKW2QGWIHA6","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5YKW2QGWIHA6N3E3","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5YKW2QGW","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:74ebf16e4ff8fba399c387c68a52cf09de0d9408c6b3dac450d0b50a6e7af5b3","target":"graph","created_at":"2026-05-18T00:52:38Z","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":"Radio halos are diffuse synchrotron sources on scales of ~1 Mpc that are found in merging clusters of galaxies, and are believed to be powered by electrons re-accelerated by the merger-driven turbulence. We present measurements of extended radio emission on similarly large scales in two clusters of galaxies hosting cool cores: Abell 2390 and Abell 2261. The analysis is based on interferometric imaging with the JVLA, VLA and GMRT. We present detailed radio images of the targets, subtract the compact emission components, and measure the spectral indices for the diffuse components. The radio emis","authors_text":"Annalisa Bonafede, Arif Babul, Florian Pacaud, Frank Bertoldi, Huib Intema, Kaustuv Basu, Martin W. Sommer","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-10-25T13:51:50Z","title":"Mpc-scale diffuse radio emission in two massive cool-core clusters of galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.07875","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:a60fdf29a61c40f763a9ffb408a8a0df6d9159e263515e181e65b75d70ab0a48","target":"record","created_at":"2026-05-18T00:52:38Z","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":"09c17686248e666fce2484e5226823f563fbb7206a62d19c607fc1cb5feb9777","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-10-25T13:51:50Z","title_canon_sha256":"b1eaef94479c0139605c7869a16de85a1d1777ef5b4b5f9ab48353f1b8b6e0bf"},"schema_version":"1.0","source":{"id":"1610.07875","kind":"arxiv","version":1}},"canonical_sha256":"ee156d40d641c1e6ec9b7f0b988588f227a7f7cf05d289e65e11a262570b0d91","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ee156d40d641c1e6ec9b7f0b988588f227a7f7cf05d289e65e11a262570b0d91","first_computed_at":"2026-05-18T00:52:38.225069Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:52:38.225069Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"l1uGsmpFpGFWToLnyX3EZyheAdt7BuPRBIgeNJkisNh8Z03GWH3OAik5ahJZlGniscaTX96G6wX3JMH8wyuqCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:52:38.225746Z","signed_message":"canonical_sha256_bytes"},"source_id":"1610.07875","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a60fdf29a61c40f763a9ffb408a8a0df6d9159e263515e181e65b75d70ab0a48","sha256:74ebf16e4ff8fba399c387c68a52cf09de0d9408c6b3dac450d0b50a6e7af5b3"],"state_sha256":"6536f332a45482dbbfbc7c9476fd90eb6ba6eb381149888d634860974c8953e4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aR2RKru75sBumxIUaz0yyFSktFOX64OL4BSvmlyocWO1ca+McXRJU3aEJvD8xO1/yZ7ZBqoswJtwAJ6rgMuHAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T13:12:14.036082Z","bundle_sha256":"8592fc7337691b4583b9231c9b322aabf0ccf2c6ed62b0707657acbe118497fa"}}