{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:YTRHYC4ZVPKQGHL6MSTAHRIVDO","short_pith_number":"pith:YTRHYC4Z","canonical_record":{"source":{"id":"1909.05534","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-09-12T09:39:04Z","cross_cats_sorted":[],"title_canon_sha256":"d5657045903db5ebaa3d83cc9acd18507600a75f8a6e1201bda9a6b48a61c14f","abstract_canon_sha256":"65a8779fd6670a61a511e34cf6b84fae2d6e87f1e84a4977051fd8c6d3afc254"},"schema_version":"1.0"},"canonical_sha256":"c4e27c0b99abd5031d7e64a603c5151ba613c4c705ffe11599a51946af9b7044","source":{"kind":"arxiv","id":"1909.05534","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.05534","created_at":"2026-07-05T00:04:15Z"},{"alias_kind":"arxiv_version","alias_value":"1909.05534v1","created_at":"2026-07-05T00:04:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.05534","created_at":"2026-07-05T00:04:15Z"},{"alias_kind":"pith_short_12","alias_value":"YTRHYC4ZVPKQ","created_at":"2026-07-05T00:04:15Z"},{"alias_kind":"pith_short_16","alias_value":"YTRHYC4ZVPKQGHL6","created_at":"2026-07-05T00:04:15Z"},{"alias_kind":"pith_short_8","alias_value":"YTRHYC4Z","created_at":"2026-07-05T00:04:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:YTRHYC4ZVPKQGHL6MSTAHRIVDO","target":"record","payload":{"canonical_record":{"source":{"id":"1909.05534","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-09-12T09:39:04Z","cross_cats_sorted":[],"title_canon_sha256":"d5657045903db5ebaa3d83cc9acd18507600a75f8a6e1201bda9a6b48a61c14f","abstract_canon_sha256":"65a8779fd6670a61a511e34cf6b84fae2d6e87f1e84a4977051fd8c6d3afc254"},"schema_version":"1.0"},"canonical_sha256":"c4e27c0b99abd5031d7e64a603c5151ba613c4c705ffe11599a51946af9b7044","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:04:15.653037Z","signature_b64":"hwB/c+Iy5YVroXOl94xHiWP+O+t2lIAC3U1vyEw04GEdDwsHR3gIkTFQ7BwS9wsw+BHLJdvrDTHtRIWKxM7oDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c4e27c0b99abd5031d7e64a603c5151ba613c4c705ffe11599a51946af9b7044","last_reissued_at":"2026-07-05T00:04:15.652580Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:04:15.652580Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.05534","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":"2026-07-05T00:04:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kUnpw1J7XpqlyBJ5xidLzv247l0B3rvFCAfKmNDe/XQIyF8yEnCiYQpGAyU72yYcqL4+gif1xv80WUPw3xB/Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T14:36:33.174160Z"},"content_sha256":"aa3784ff558c94bf45173f440550515b388c0a6194113e8f2178ca09dc01f6bc","schema_version":"1.0","event_id":"sha256:aa3784ff558c94bf45173f440550515b388c0a6194113e8f2178ca09dc01f6bc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:YTRHYC4ZVPKQGHL6MSTAHRIVDO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Inflation of 430-parsec bipolar radio bubbles in the Galactic Centre by an energetic event","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. A. Pate, A. F. Joubert, A. G. Botha, A. Hokwana, A. J. Otto, A. J. Tiplad, A. Loots, A. Peens-Hough, A. R. Foley, A. R. Isaacson, A. Rust, A. van der Byl, B. Hugo, B. H. Wallace, B. L. Fanaroff, B. Merry, B. M. Lunsky, B. Ngcebetsha, C. J. Hoek, C. L. van Dyk, C. M. Magozore, C. Tasse, C. van der Merwe, D. de Villiers, D. H. Botha, D. J. Fourie, D. Liebenberg, D. M. Horn, D. T. Taylor, E. F. Bauermeister, F. B. Kapp, F. Camilo, F. Yusef-Zadeh, G. I. G. J\\'ozsa, H. Kriel, I. Heywood, I. P. Theron, I. P. T. Moeng, J. A. Malan, J. D. B. L. Jordaan, J. L. Jonas, J. M. Chalmers, J. M. G. Horrell, J. P. Burger, J. P. L. Main, J. R. Manley, J. S. Kenyon, K. Thorat, L. C. Schwardt, L. G. Magnus, L. J. du Toit, L. P. Williams, L. R. S. Brederode, L. Sofeya, M. A. Aldera, M. A. Dikgale-Mahlakoana, M. C. Mphego, M. D. J. Maree, M. G. Welz, M. J. Hlakola, M. Serylak, N. Mnyandu, N. Oozeer, O. Mahgoub, O. M. Smirnov, P. P. A. Kotz\\'e, P. S. Macfarlane, P. S. Swart, R. D. Malgas, R. Lehmensiek, R. M. Adam, R. Millenaar, R. P. M. Julie, R. Renil, R. R. G. Gamatham, R. S. Booth, R. Siebrits, R. T. Lord, R. van Rooyen, R. Van Wyk, S. Goedhart, S. Gounden, S. J. Buchner, S. J. Perkins, S. K. Sirothia, S. M. Ratcliffe, S. Salie, S. S. Passmoor, S. Tshongweni, S. W. P. Esterhuyse, T. Cheetham, T. D. Abbott, T. E. Monama, T. J. van Balla, T. W. Kusel, V. van Tonder, W. D. Cotton, W. S. New, Z. B. Brits","submitted_at":"2019-09-12T09:39:04Z","abstract_excerpt":"The Galactic Centre contains a supermassive black hole with a mass of 4 million suns within an environment that differs markedly from that of the Galactic disk. While the black hole is essentially quiescent in the broader context of active galactic nuclei, X-ray observations have provided evidence for energetic outbursts from its surroundings. Also, while the levels of star formation in the Galactic Centre have been approximately constant over the last few hundred Myr, there is evidence of elevated short-duration bursts, strongly influenced by interaction of the black hole with the enhanced ga"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.05534","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/1909.05534/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":"2026-07-05T00:04:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2WXcYcK8lJb5BUTvH7xBYcnuyfP2D67eWYcb2pCIaeRQWLwoy09blcnlvCATZe/v47YqRqClwLi/LBoztKOmCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T14:36:33.175027Z"},"content_sha256":"f5a41a81811c9c54edef582a60e273096b02743b51ebeb56a48fa2849952f223","schema_version":"1.0","event_id":"sha256:f5a41a81811c9c54edef582a60e273096b02743b51ebeb56a48fa2849952f223"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YTRHYC4ZVPKQGHL6MSTAHRIVDO/bundle.json","state_url":"https://pith.science/pith/YTRHYC4ZVPKQGHL6MSTAHRIVDO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YTRHYC4ZVPKQGHL6MSTAHRIVDO/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":"2026-08-15T14:36:33Z","links":{"resolver":"https://pith.science/pith/YTRHYC4ZVPKQGHL6MSTAHRIVDO","bundle":"https://pith.science/pith/YTRHYC4ZVPKQGHL6MSTAHRIVDO/bundle.json","state":"https://pith.science/pith/YTRHYC4ZVPKQGHL6MSTAHRIVDO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YTRHYC4ZVPKQGHL6MSTAHRIVDO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:YTRHYC4ZVPKQGHL6MSTAHRIVDO","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":"65a8779fd6670a61a511e34cf6b84fae2d6e87f1e84a4977051fd8c6d3afc254","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-09-12T09:39:04Z","title_canon_sha256":"d5657045903db5ebaa3d83cc9acd18507600a75f8a6e1201bda9a6b48a61c14f"},"schema_version":"1.0","source":{"id":"1909.05534","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.05534","created_at":"2026-07-05T00:04:15Z"},{"alias_kind":"arxiv_version","alias_value":"1909.05534v1","created_at":"2026-07-05T00:04:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.05534","created_at":"2026-07-05T00:04:15Z"},{"alias_kind":"pith_short_12","alias_value":"YTRHYC4ZVPKQ","created_at":"2026-07-05T00:04:15Z"},{"alias_kind":"pith_short_16","alias_value":"YTRHYC4ZVPKQGHL6","created_at":"2026-07-05T00:04:15Z"},{"alias_kind":"pith_short_8","alias_value":"YTRHYC4Z","created_at":"2026-07-05T00:04:15Z"}],"graph_snapshots":[{"event_id":"sha256:f5a41a81811c9c54edef582a60e273096b02743b51ebeb56a48fa2849952f223","target":"graph","created_at":"2026-07-05T00:04:15Z","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/1909.05534/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Galactic Centre contains a supermassive black hole with a mass of 4 million suns within an environment that differs markedly from that of the Galactic disk. While the black hole is essentially quiescent in the broader context of active galactic nuclei, X-ray observations have provided evidence for energetic outbursts from its surroundings. Also, while the levels of star formation in the Galactic Centre have been approximately constant over the last few hundred Myr, there is evidence of elevated short-duration bursts, strongly influenced by interaction of the black hole with the enhanced ga","authors_text":"A. A. Pate, A. F. Joubert, A. G. Botha, A. Hokwana, A. J. Otto, A. J. Tiplad, A. Loots, A. Peens-Hough, A. R. Foley, A. R. Isaacson, A. Rust, A. van der Byl, B. Hugo, B. H. Wallace, B. L. Fanaroff, B. Merry, B. M. Lunsky, B. Ngcebetsha, C. J. Hoek, C. L. van Dyk, C. M. Magozore, C. Tasse, C. van der Merwe, D. de Villiers, D. H. Botha, D. J. Fourie, D. Liebenberg, D. M. Horn, D. T. Taylor, E. F. Bauermeister, F. B. Kapp, F. Camilo, F. Yusef-Zadeh, G. I. G. J\\'ozsa, H. Kriel, I. Heywood, I. P. Theron, I. P. T. Moeng, J. A. Malan, J. D. B. L. Jordaan, J. L. Jonas, J. M. Chalmers, J. M. G. Horrell, J. P. Burger, J. P. L. Main, J. R. Manley, J. S. Kenyon, K. Thorat, L. C. Schwardt, L. G. Magnus, L. J. du Toit, L. P. Williams, L. R. S. Brederode, L. Sofeya, M. A. Aldera, M. A. Dikgale-Mahlakoana, M. C. Mphego, M. D. J. Maree, M. G. Welz, M. J. Hlakola, M. Serylak, N. Mnyandu, N. Oozeer, O. Mahgoub, O. M. Smirnov, P. P. A. Kotz\\'e, P. S. Macfarlane, P. S. Swart, R. D. Malgas, R. Lehmensiek, R. M. Adam, R. Millenaar, R. P. M. Julie, R. Renil, R. R. G. Gamatham, R. S. Booth, R. Siebrits, R. T. Lord, R. van Rooyen, R. Van Wyk, S. Goedhart, S. Gounden, S. J. Buchner, S. J. Perkins, S. K. Sirothia, S. M. Ratcliffe, S. Salie, S. S. Passmoor, S. Tshongweni, S. W. P. Esterhuyse, T. Cheetham, T. D. Abbott, T. E. Monama, T. J. van Balla, T. W. Kusel, V. van Tonder, W. D. Cotton, W. S. New, Z. B. Brits","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-09-12T09:39:04Z","title":"Inflation of 430-parsec bipolar radio bubbles in the Galactic Centre by an energetic event"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.05534","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:aa3784ff558c94bf45173f440550515b388c0a6194113e8f2178ca09dc01f6bc","target":"record","created_at":"2026-07-05T00:04:15Z","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":"65a8779fd6670a61a511e34cf6b84fae2d6e87f1e84a4977051fd8c6d3afc254","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-09-12T09:39:04Z","title_canon_sha256":"d5657045903db5ebaa3d83cc9acd18507600a75f8a6e1201bda9a6b48a61c14f"},"schema_version":"1.0","source":{"id":"1909.05534","kind":"arxiv","version":1}},"canonical_sha256":"c4e27c0b99abd5031d7e64a603c5151ba613c4c705ffe11599a51946af9b7044","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c4e27c0b99abd5031d7e64a603c5151ba613c4c705ffe11599a51946af9b7044","first_computed_at":"2026-07-05T00:04:15.652580Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:04:15.652580Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hwB/c+Iy5YVroXOl94xHiWP+O+t2lIAC3U1vyEw04GEdDwsHR3gIkTFQ7BwS9wsw+BHLJdvrDTHtRIWKxM7oDA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:04:15.653037Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.05534","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aa3784ff558c94bf45173f440550515b388c0a6194113e8f2178ca09dc01f6bc","sha256:f5a41a81811c9c54edef582a60e273096b02743b51ebeb56a48fa2849952f223"],"state_sha256":"7efb1f6fab88b21efa678e533260d7ebbbf056977e263c8f649849126f90ef3a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/fECgDixNPvhbVpvMF5/8QmNz8LUL5KDEZrxt99AJC8uz8JzH2LH41CjldXE2MYvy0EqBcEoP1NfR+5o354ABQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T14:36:33.180598Z","bundle_sha256":"51be04b073fee5956e5faf189ef514e86dc3369c8764d1c7c8f0f1d6d0800801"}}