{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:UUIPGCNIVEQNDTB5ITJ5U6GVWG","short_pith_number":"pith:UUIPGCNI","canonical_record":{"source":{"id":"1108.1398","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-05T20:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"c3a7e71de193ceacf635c2a7ca1a9488ae3c88bcdac766302de8994c9dd44a4e","abstract_canon_sha256":"ffa595df02cdcd79b062927a261ffb891f589eb73ed6a51f6cf2ad8ceab96c60"},"schema_version":"1.0"},"canonical_sha256":"a510f309a8a920d1cc3d44d3da78d5b1a431ef8cad83babac81a7f96098cc367","source":{"kind":"arxiv","id":"1108.1398","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.1398","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"arxiv_version","alias_value":"1108.1398v1","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.1398","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"pith_short_12","alias_value":"UUIPGCNIVEQN","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"UUIPGCNIVEQNDTB5","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"UUIPGCNI","created_at":"2026-05-18T12:26:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:UUIPGCNIVEQNDTB5ITJ5U6GVWG","target":"record","payload":{"canonical_record":{"source":{"id":"1108.1398","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-05T20:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"c3a7e71de193ceacf635c2a7ca1a9488ae3c88bcdac766302de8994c9dd44a4e","abstract_canon_sha256":"ffa595df02cdcd79b062927a261ffb891f589eb73ed6a51f6cf2ad8ceab96c60"},"schema_version":"1.0"},"canonical_sha256":"a510f309a8a920d1cc3d44d3da78d5b1a431ef8cad83babac81a7f96098cc367","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:00.947941Z","signature_b64":"e9IQkTlZRNN+8KvRh9Hlmj7flqhtbJlOlhVBJmbHMt3uy/mCmR9MC3E3+dgDZwIf0P3u8ldeJ/f8X9BwQp7lCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a510f309a8a920d1cc3d44d3da78d5b1a431ef8cad83babac81a7f96098cc367","last_reissued_at":"2026-05-18T02:01:00.947543Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:00.947543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1108.1398","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":"2026-05-18T02:01:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VGMLgW8ueBp517AvjLxpUOAIevPfevWy0fYOcJKSnJsGm96r/rGnGwbInG7h9sDPqPoLKVskWKTfsRO6R552BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T21:41:17.734013Z"},"content_sha256":"37825621075ff7860c1e51eec2e273e65253af49803231bbf5fbb6dbdcf9f433","schema_version":"1.0","event_id":"sha256:37825621075ff7860c1e51eec2e273e65253af49803231bbf5fbb6dbdcf9f433"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:UUIPGCNIVEQNDTB5ITJ5U6GVWG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Using double radio relics to constrain galaxy cluster mergers: A model of double radio relics in CIZA J2242.8+5301","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"H. J. A. Rottgering, M. Bruggen, M. Hoeft, R. J. van Weeren","submitted_at":"2011-08-05T20:00:04Z","abstract_excerpt":"Galaxy clusters grow by mergers with other clusters and galaxy groups. These mergers create shock waves within the intracluster medium (ICM) that can accelerate particles to extreme energies. In the presence of magnetic fields, relativistic electrons form large regions emitting synchrotron radiation, so-called radio relics. Behind the shock front, synchrotron and inverse Compton (IC) losses cause the radio spectral index to steepen away from the shock front. An example of such a cluster is CIZA J2242.8+5301, where very clear spectral steepening in the downstream region is observed. Here we pre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.1398","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":"2026-05-18T02:01:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LurJ0HsFWGdFBj3MIJXBonG7R/bn4JZxsJDy4kf6tBID7lU36JjofhxNCfc+j5MbnxTT5n5jPIZBXKrKhZNqCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T21:41:17.734656Z"},"content_sha256":"3ac15773e2c229e8bd75949082952c6a9eddff27a680726e87ce2f76cecd402e","schema_version":"1.0","event_id":"sha256:3ac15773e2c229e8bd75949082952c6a9eddff27a680726e87ce2f76cecd402e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UUIPGCNIVEQNDTB5ITJ5U6GVWG/bundle.json","state_url":"https://pith.science/pith/UUIPGCNIVEQNDTB5ITJ5U6GVWG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UUIPGCNIVEQNDTB5ITJ5U6GVWG/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":"2026-05-21T21:41:17Z","links":{"resolver":"https://pith.science/pith/UUIPGCNIVEQNDTB5ITJ5U6GVWG","bundle":"https://pith.science/pith/UUIPGCNIVEQNDTB5ITJ5U6GVWG/bundle.json","state":"https://pith.science/pith/UUIPGCNIVEQNDTB5ITJ5U6GVWG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UUIPGCNIVEQNDTB5ITJ5U6GVWG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:UUIPGCNIVEQNDTB5ITJ5U6GVWG","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":"ffa595df02cdcd79b062927a261ffb891f589eb73ed6a51f6cf2ad8ceab96c60","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-05T20:00:04Z","title_canon_sha256":"c3a7e71de193ceacf635c2a7ca1a9488ae3c88bcdac766302de8994c9dd44a4e"},"schema_version":"1.0","source":{"id":"1108.1398","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.1398","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"arxiv_version","alias_value":"1108.1398v1","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.1398","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"pith_short_12","alias_value":"UUIPGCNIVEQN","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"UUIPGCNIVEQNDTB5","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"UUIPGCNI","created_at":"2026-05-18T12:26:42Z"}],"graph_snapshots":[{"event_id":"sha256:3ac15773e2c229e8bd75949082952c6a9eddff27a680726e87ce2f76cecd402e","target":"graph","created_at":"2026-05-18T02:01:00Z","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":"Galaxy clusters grow by mergers with other clusters and galaxy groups. These mergers create shock waves within the intracluster medium (ICM) that can accelerate particles to extreme energies. In the presence of magnetic fields, relativistic electrons form large regions emitting synchrotron radiation, so-called radio relics. Behind the shock front, synchrotron and inverse Compton (IC) losses cause the radio spectral index to steepen away from the shock front. An example of such a cluster is CIZA J2242.8+5301, where very clear spectral steepening in the downstream region is observed. Here we pre","authors_text":"H. J. A. Rottgering, M. Bruggen, M. Hoeft, R. J. van Weeren","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-05T20:00:04Z","title":"Using double radio relics to constrain galaxy cluster mergers: A model of double radio relics in CIZA J2242.8+5301"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.1398","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":"sha256:37825621075ff7860c1e51eec2e273e65253af49803231bbf5fbb6dbdcf9f433","target":"record","created_at":"2026-05-18T02:01:00Z","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":"ffa595df02cdcd79b062927a261ffb891f589eb73ed6a51f6cf2ad8ceab96c60","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-05T20:00:04Z","title_canon_sha256":"c3a7e71de193ceacf635c2a7ca1a9488ae3c88bcdac766302de8994c9dd44a4e"},"schema_version":"1.0","source":{"id":"1108.1398","kind":"arxiv","version":1}},"canonical_sha256":"a510f309a8a920d1cc3d44d3da78d5b1a431ef8cad83babac81a7f96098cc367","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a510f309a8a920d1cc3d44d3da78d5b1a431ef8cad83babac81a7f96098cc367","first_computed_at":"2026-05-18T02:01:00.947543Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:00.947543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e9IQkTlZRNN+8KvRh9Hlmj7flqhtbJlOlhVBJmbHMt3uy/mCmR9MC3E3+dgDZwIf0P3u8ldeJ/f8X9BwQp7lCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:00.947941Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.1398","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:37825621075ff7860c1e51eec2e273e65253af49803231bbf5fbb6dbdcf9f433","sha256:3ac15773e2c229e8bd75949082952c6a9eddff27a680726e87ce2f76cecd402e"],"state_sha256":"f008e3495a7259f1fecaa6a6218511bec6ec8a75fc8825ecff01defe5576dc89"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vORsg8MOLNzU+gVjRUpZdCTG3LYe/9eXOBjZxYPSepd3sEUeVD4S/skqFkIr58FgEVH5qEq5u65R4y5MNvZcCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T21:41:17.737803Z","bundle_sha256":"b11dd049f37de4e9fdc172aaabba108ec61aa8f439d7be5ce31f9008c899bc82"}}