{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:FCGBQN3RM22OKM6AWXNWNLSZ3J","short_pith_number":"pith:FCGBQN3R","canonical_record":{"source":{"id":"2406.18983","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2024-06-27T08:26:10Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"1b68f1dde756ce28176b62f89f849723336833777912fb7e0d1e5239f1db8f31","abstract_canon_sha256":"649b0a0a3592776a6745968e0d88da80c864fb762ff8365efe22444138629cbd"},"schema_version":"1.0"},"canonical_sha256":"288c18377166b4e533c0b5db66ae59da7642910917c75e978365eda15612e8b3","source":{"kind":"arxiv","id":"2406.18983","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.18983","created_at":"2026-07-05T09:20:44Z"},{"alias_kind":"arxiv_version","alias_value":"2406.18983v2","created_at":"2026-07-05T09:20:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.18983","created_at":"2026-07-05T09:20:44Z"},{"alias_kind":"pith_short_12","alias_value":"FCGBQN3RM22O","created_at":"2026-07-05T09:20:44Z"},{"alias_kind":"pith_short_16","alias_value":"FCGBQN3RM22OKM6A","created_at":"2026-07-05T09:20:44Z"},{"alias_kind":"pith_short_8","alias_value":"FCGBQN3R","created_at":"2026-07-05T09:20:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:FCGBQN3RM22OKM6AWXNWNLSZ3J","target":"record","payload":{"canonical_record":{"source":{"id":"2406.18983","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2024-06-27T08:26:10Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"1b68f1dde756ce28176b62f89f849723336833777912fb7e0d1e5239f1db8f31","abstract_canon_sha256":"649b0a0a3592776a6745968e0d88da80c864fb762ff8365efe22444138629cbd"},"schema_version":"1.0"},"canonical_sha256":"288c18377166b4e533c0b5db66ae59da7642910917c75e978365eda15612e8b3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:20:44.778322Z","signature_b64":"LMWevqgoawjoERSeBp98ALVO2kvmzL0m4/n/M+E4GggB0m+0WI/yBdeMsGn4DcFWRb+NjSpV/Q2/8O3azb5JDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"288c18377166b4e533c0b5db66ae59da7642910917c75e978365eda15612e8b3","last_reissued_at":"2026-07-05T09:20:44.777910Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:20:44.777910Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2406.18983","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":"2026-07-05T09:20:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RpJo+yNGaOxiuGir4gDLL0FI2X0+vt+Iyjm/2AFl0nEjQap9lol8NqLxROO96GWstgo5YHmpJNyt7Dp6kbgUBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T00:03:27.898422Z"},"content_sha256":"5c9dde0b4a24f07449632eb490e5402b8f54939ec9f3823423b52563dea6fd63","schema_version":"1.0","event_id":"sha256:5c9dde0b4a24f07449632eb490e5402b8f54939ec9f3823423b52563dea6fd63"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:FCGBQN3RM22OKM6AWXNWNLSZ3J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The prototypical major cluster merger Abell 754. I. Calibration of MeerKAT data and radio/X-ray spectral mapping of the cluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"A. Botteon, D. Eckert, F. Gastaldello, G. Brunetti, M. Markevitch, R. J. van Weeren, R. Kale, S. Giacintucci, T. Venturi","submitted_at":"2024-06-27T08:26:10Z","abstract_excerpt":"Abell 754 is a rich galaxy cluster at $z=0.0543$ and is considered the prototype of a major cluster merger. Like many dynamically unrelaxed systems, it hosts diffuse radio emission on Mpc-scales. Extended synchrotron sources in the intra-cluster medium (ICM) are commonly interpreted as evidence that a fraction of the gravitational energy released during cluster mergers is dissipated into nonthermal components. Here, we use new MeerKAT UHF- and L-band observations to study nonthermal phenomena in Abell 754. These data are complemented with archival XMM-Newton observations to investigate the res"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.18983","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/2406.18983/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":"2026-07-05T09:20:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fkv2fxMTdoiGBGvUZtQVXZWaaNvLOcD2OGyq2pkZg+3PK9He55YrUb8poXptJ3iJsRqqfYwvEgLLQgdqrg8QAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T00:03:27.898967Z"},"content_sha256":"c2a86676d41089bffe0280b5f022d6166d82062502228205324069955deec164","schema_version":"1.0","event_id":"sha256:c2a86676d41089bffe0280b5f022d6166d82062502228205324069955deec164"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FCGBQN3RM22OKM6AWXNWNLSZ3J/bundle.json","state_url":"https://pith.science/pith/FCGBQN3RM22OKM6AWXNWNLSZ3J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FCGBQN3RM22OKM6AWXNWNLSZ3J/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":"2026-08-04T00:03:27Z","links":{"resolver":"https://pith.science/pith/FCGBQN3RM22OKM6AWXNWNLSZ3J","bundle":"https://pith.science/pith/FCGBQN3RM22OKM6AWXNWNLSZ3J/bundle.json","state":"https://pith.science/pith/FCGBQN3RM22OKM6AWXNWNLSZ3J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FCGBQN3RM22OKM6AWXNWNLSZ3J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:FCGBQN3RM22OKM6AWXNWNLSZ3J","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":"649b0a0a3592776a6745968e0d88da80c864fb762ff8365efe22444138629cbd","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2024-06-27T08:26:10Z","title_canon_sha256":"1b68f1dde756ce28176b62f89f849723336833777912fb7e0d1e5239f1db8f31"},"schema_version":"1.0","source":{"id":"2406.18983","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.18983","created_at":"2026-07-05T09:20:44Z"},{"alias_kind":"arxiv_version","alias_value":"2406.18983v2","created_at":"2026-07-05T09:20:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.18983","created_at":"2026-07-05T09:20:44Z"},{"alias_kind":"pith_short_12","alias_value":"FCGBQN3RM22O","created_at":"2026-07-05T09:20:44Z"},{"alias_kind":"pith_short_16","alias_value":"FCGBQN3RM22OKM6A","created_at":"2026-07-05T09:20:44Z"},{"alias_kind":"pith_short_8","alias_value":"FCGBQN3R","created_at":"2026-07-05T09:20:44Z"}],"graph_snapshots":[{"event_id":"sha256:c2a86676d41089bffe0280b5f022d6166d82062502228205324069955deec164","target":"graph","created_at":"2026-07-05T09:20:44Z","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/2406.18983/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Abell 754 is a rich galaxy cluster at $z=0.0543$ and is considered the prototype of a major cluster merger. Like many dynamically unrelaxed systems, it hosts diffuse radio emission on Mpc-scales. Extended synchrotron sources in the intra-cluster medium (ICM) are commonly interpreted as evidence that a fraction of the gravitational energy released during cluster mergers is dissipated into nonthermal components. Here, we use new MeerKAT UHF- and L-band observations to study nonthermal phenomena in Abell 754. These data are complemented with archival XMM-Newton observations to investigate the res","authors_text":"A. Botteon, D. Eckert, F. Gastaldello, G. Brunetti, M. Markevitch, R. J. van Weeren, R. Kale, S. Giacintucci, T. Venturi","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2024-06-27T08:26:10Z","title":"The prototypical major cluster merger Abell 754. I. Calibration of MeerKAT data and radio/X-ray spectral mapping of the cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.18983","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":"sha256:5c9dde0b4a24f07449632eb490e5402b8f54939ec9f3823423b52563dea6fd63","target":"record","created_at":"2026-07-05T09:20:44Z","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":"649b0a0a3592776a6745968e0d88da80c864fb762ff8365efe22444138629cbd","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2024-06-27T08:26:10Z","title_canon_sha256":"1b68f1dde756ce28176b62f89f849723336833777912fb7e0d1e5239f1db8f31"},"schema_version":"1.0","source":{"id":"2406.18983","kind":"arxiv","version":2}},"canonical_sha256":"288c18377166b4e533c0b5db66ae59da7642910917c75e978365eda15612e8b3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"288c18377166b4e533c0b5db66ae59da7642910917c75e978365eda15612e8b3","first_computed_at":"2026-07-05T09:20:44.777910Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:20:44.777910Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LMWevqgoawjoERSeBp98ALVO2kvmzL0m4/n/M+E4GggB0m+0WI/yBdeMsGn4DcFWRb+NjSpV/Q2/8O3azb5JDA==","signature_status":"signed_v1","signed_at":"2026-07-05T09:20:44.778322Z","signed_message":"canonical_sha256_bytes"},"source_id":"2406.18983","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c9dde0b4a24f07449632eb490e5402b8f54939ec9f3823423b52563dea6fd63","sha256:c2a86676d41089bffe0280b5f022d6166d82062502228205324069955deec164"],"state_sha256":"55381e9a5800a17548dabfeb3c750021a5a54de8c133df3d518eeb939f5b578c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BTxsWcfx7kawZvDJIfjaN1FJVog8XIVwG8hLrjdNHRNWuKax0tq4O2kHDdns4CDqxtkuFr5BSRmZs5ju57JHDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T00:03:27.902964Z","bundle_sha256":"347d10ce1798e30fba4dca4f2a24cbd776d930abfcdc76bc16acbd36875ad1e9"}}