{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:7Y3XJLNHHZLY65F5WLJRK3PE2T","short_pith_number":"pith:7Y3XJLNH","canonical_record":{"source":{"id":"1103.1364","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-03-07T20:16:04Z","cross_cats_sorted":[],"title_canon_sha256":"64a348386746ac4da68317b4b1c549794cef3566e2a1ff18df238f82895bf11e","abstract_canon_sha256":"8bb849cb0bd75c84664d56cb212a31886d50e0b83d9d9f86e838e9aa398da33a"},"schema_version":"1.0"},"canonical_sha256":"fe3774ada73e578f74bdb2d3156de4d4c40e06cccb20cc75590becf53425ce84","source":{"kind":"arxiv","id":"1103.1364","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.1364","created_at":"2026-05-18T02:02:58Z"},{"alias_kind":"arxiv_version","alias_value":"1103.1364v1","created_at":"2026-05-18T02:02:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.1364","created_at":"2026-05-18T02:02:58Z"},{"alias_kind":"pith_short_12","alias_value":"7Y3XJLNHHZLY","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"7Y3XJLNHHZLY65F5","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"7Y3XJLNH","created_at":"2026-05-18T12:26:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:7Y3XJLNHHZLY65F5WLJRK3PE2T","target":"record","payload":{"canonical_record":{"source":{"id":"1103.1364","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-03-07T20:16:04Z","cross_cats_sorted":[],"title_canon_sha256":"64a348386746ac4da68317b4b1c549794cef3566e2a1ff18df238f82895bf11e","abstract_canon_sha256":"8bb849cb0bd75c84664d56cb212a31886d50e0b83d9d9f86e838e9aa398da33a"},"schema_version":"1.0"},"canonical_sha256":"fe3774ada73e578f74bdb2d3156de4d4c40e06cccb20cc75590becf53425ce84","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:02:58.674582Z","signature_b64":"Y2M0Zp5Jyo1zU2uIYcaA19mmGA3xchltLY6g4TdxzGDzv1ODttL7jBbmA2DgwhVpmfTp9lni+V9KwCei9+EfDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fe3774ada73e578f74bdb2d3156de4d4c40e06cccb20cc75590becf53425ce84","last_reissued_at":"2026-05-18T02:02:58.673768Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:02:58.673768Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1103.1364","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":"2026-05-18T02:02:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nPjQIBfbSp1zAArWvyaGXQnmsq/uakvBZTb6CqCR/61gxgUNkcQWt0u4jkj4/6m8SQA7WQdrG/z5P5aRyzJ+Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:46:46.411082Z"},"content_sha256":"63981e1b7b2a763f2149b87674449c2abe79873109f5930ce1ebd96675705909","schema_version":"1.0","event_id":"sha256:63981e1b7b2a763f2149b87674449c2abe79873109f5930ce1ebd96675705909"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:7Y3XJLNHHZLY65F5WLJRK3PE2T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A combined low-radio frequency/X-ray study of galaxy groups I. Giant Metrewave Radio Telescope observations at 235 MHz and 610 MHz","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"C.H. Ishwara-Chandra, Christine Jones, Ewan O'Sullivan, Jan Vrtilek, Laurence P. David, Matteo Murgia, Myriam Gitti, Pasquale Mazzotta, Ramana M. Athreya, Simona Giacintucci, Somak Raychaudhury, Tiziana Venturi, Tracy Clarke, Trevor Ponman, William R. Forman","submitted_at":"2011-03-07T20:16:04Z","abstract_excerpt":"We present new Giant Metrewave Radio Telescope observations at 235 MHz and 610 MHz of 18 X-ray bright galaxy groups. These observations are part of an extended project, presented here and in future papers, which combines low-frequency radio and X-ray data to investigate the interaction between central active galactic nuclei (AGN) and the intra-group medium (IGM). The radio images show a very diverse population of group-central radio sources, varying widely in size, power, morphology and spectral index. Comparison of the radio images with Chandra and XMM-Newton X-ray images shows that groups wi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.1364","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":"2026-05-18T02:02:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ySWto6Mmc94X3r+RG9t8ckmDaS2IzTiqGqrBTKA9oMkWaF2HycYFdNrrm0BVbjImv0cq9/q9VQ5vFV37JwGjBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:46:46.411443Z"},"content_sha256":"8b83fb87b5f069969340d1659b004429a59394df5edd4145ac1fa1c33fa766d6","schema_version":"1.0","event_id":"sha256:8b83fb87b5f069969340d1659b004429a59394df5edd4145ac1fa1c33fa766d6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7Y3XJLNHHZLY65F5WLJRK3PE2T/bundle.json","state_url":"https://pith.science/pith/7Y3XJLNHHZLY65F5WLJRK3PE2T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7Y3XJLNHHZLY65F5WLJRK3PE2T/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":"2026-06-03T05:46:46Z","links":{"resolver":"https://pith.science/pith/7Y3XJLNHHZLY65F5WLJRK3PE2T","bundle":"https://pith.science/pith/7Y3XJLNHHZLY65F5WLJRK3PE2T/bundle.json","state":"https://pith.science/pith/7Y3XJLNHHZLY65F5WLJRK3PE2T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7Y3XJLNHHZLY65F5WLJRK3PE2T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:7Y3XJLNHHZLY65F5WLJRK3PE2T","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":"8bb849cb0bd75c84664d56cb212a31886d50e0b83d9d9f86e838e9aa398da33a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-03-07T20:16:04Z","title_canon_sha256":"64a348386746ac4da68317b4b1c549794cef3566e2a1ff18df238f82895bf11e"},"schema_version":"1.0","source":{"id":"1103.1364","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.1364","created_at":"2026-05-18T02:02:58Z"},{"alias_kind":"arxiv_version","alias_value":"1103.1364v1","created_at":"2026-05-18T02:02:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.1364","created_at":"2026-05-18T02:02:58Z"},{"alias_kind":"pith_short_12","alias_value":"7Y3XJLNHHZLY","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"7Y3XJLNHHZLY65F5","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"7Y3XJLNH","created_at":"2026-05-18T12:26:22Z"}],"graph_snapshots":[{"event_id":"sha256:8b83fb87b5f069969340d1659b004429a59394df5edd4145ac1fa1c33fa766d6","target":"graph","created_at":"2026-05-18T02:02:58Z","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":"We present new Giant Metrewave Radio Telescope observations at 235 MHz and 610 MHz of 18 X-ray bright galaxy groups. These observations are part of an extended project, presented here and in future papers, which combines low-frequency radio and X-ray data to investigate the interaction between central active galactic nuclei (AGN) and the intra-group medium (IGM). The radio images show a very diverse population of group-central radio sources, varying widely in size, power, morphology and spectral index. Comparison of the radio images with Chandra and XMM-Newton X-ray images shows that groups wi","authors_text":"C.H. Ishwara-Chandra, Christine Jones, Ewan O'Sullivan, Jan Vrtilek, Laurence P. David, Matteo Murgia, Myriam Gitti, Pasquale Mazzotta, Ramana M. Athreya, Simona Giacintucci, Somak Raychaudhury, Tiziana Venturi, Tracy Clarke, Trevor Ponman, William R. Forman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-03-07T20:16:04Z","title":"A combined low-radio frequency/X-ray study of galaxy groups I. Giant Metrewave Radio Telescope observations at 235 MHz and 610 MHz"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.1364","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":"sha256:63981e1b7b2a763f2149b87674449c2abe79873109f5930ce1ebd96675705909","target":"record","created_at":"2026-05-18T02:02:58Z","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":"8bb849cb0bd75c84664d56cb212a31886d50e0b83d9d9f86e838e9aa398da33a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-03-07T20:16:04Z","title_canon_sha256":"64a348386746ac4da68317b4b1c549794cef3566e2a1ff18df238f82895bf11e"},"schema_version":"1.0","source":{"id":"1103.1364","kind":"arxiv","version":1}},"canonical_sha256":"fe3774ada73e578f74bdb2d3156de4d4c40e06cccb20cc75590becf53425ce84","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe3774ada73e578f74bdb2d3156de4d4c40e06cccb20cc75590becf53425ce84","first_computed_at":"2026-05-18T02:02:58.673768Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:58.673768Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y2M0Zp5Jyo1zU2uIYcaA19mmGA3xchltLY6g4TdxzGDzv1ODttL7jBbmA2DgwhVpmfTp9lni+V9KwCei9+EfDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:58.674582Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.1364","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:63981e1b7b2a763f2149b87674449c2abe79873109f5930ce1ebd96675705909","sha256:8b83fb87b5f069969340d1659b004429a59394df5edd4145ac1fa1c33fa766d6"],"state_sha256":"38eed21b365a78a0444c578a13ab3f3a0b47b5002496cb9bebb50de57fc7dcc1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YY/eZval0AfrA5gTa1jujNdl5iDl7QQw2CK+Pl+iErqhdZwKbDYk/ZUoZAg0MgwhKtfJngQ6O55itxeK7/zTAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T05:46:46.413519Z","bundle_sha256":"dc626ec35e5dd5077efcff8bcd7fcf468787323a1c9e170c727967929f736097"}}