{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:5EJH4MK6FRFZWNB6NJJBGZT4PM","short_pith_number":"pith:5EJH4MK6","canonical_record":{"source":{"id":"1207.4215","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-17T21:00:00Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"8d807171a91d5cebe120fe34ee5a06b82bcf72b887634a2276e93097e98144b4","abstract_canon_sha256":"fc919353cbfa4b82e79a828694ffe10e0a23aaafb52bf65dab0ff1e3152bde01"},"schema_version":"1.0"},"canonical_sha256":"e9127e315e2c4b9b343e6a5213667c7b30759b4820b0665697b3a775ca1f9e5d","source":{"kind":"arxiv","id":"1207.4215","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.4215","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"arxiv_version","alias_value":"1207.4215v2","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.4215","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"pith_short_12","alias_value":"5EJH4MK6FRFZ","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"5EJH4MK6FRFZWNB6","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"5EJH4MK6","created_at":"2026-05-18T12:26:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:5EJH4MK6FRFZWNB6NJJBGZT4PM","target":"record","payload":{"canonical_record":{"source":{"id":"1207.4215","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-17T21:00:00Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"8d807171a91d5cebe120fe34ee5a06b82bcf72b887634a2276e93097e98144b4","abstract_canon_sha256":"fc919353cbfa4b82e79a828694ffe10e0a23aaafb52bf65dab0ff1e3152bde01"},"schema_version":"1.0"},"canonical_sha256":"e9127e315e2c4b9b343e6a5213667c7b30759b4820b0665697b3a775ca1f9e5d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:17.107467Z","signature_b64":"TUNHgFr/jdaAXWUnzeIo2LfIVpjh1iSGmxgjDvrO1DKkSU8ckh31Qr49XJX1BGSByuHPHlXR35TToqvYIQAUDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e9127e315e2c4b9b343e6a5213667c7b30759b4820b0665697b3a775ca1f9e5d","last_reissued_at":"2026-05-18T01:56:17.106905Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:17.106905Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.4215","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":"2026-05-18T01:56:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rb7zY+Cwkccf0KRd94isvojTXry1xy6U4+06GcEBFDGAYPi957mn8YRCGwycV9dl9YWcLoJZzDVSMtaKzi+hCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T15:36:32.840507Z"},"content_sha256":"089ede79c7d1626635f5f59eff7f12c3e7b701636322910577d7f9be9230ef40","schema_version":"1.0","event_id":"sha256:089ede79c7d1626635f5f59eff7f12c3e7b701636322910577d7f9be9230ef40"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:5EJH4MK6FRFZWNB6NJJBGZT4PM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Radio Synchrotron Emission from a Bow Shock around the Gas Cloud G2 Heading toward the Galactic Center","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Feryal Ozel, Lorenzo Sironi, Ramesh Narayan","submitted_at":"2012-07-17T21:00:00Z","abstract_excerpt":"A dense ionized cloud of gas has been recently discovered to be moving directly toward the supermassive black hole, Sgr A*, at the Galactic Center. In June 2013, at the pericenter of its highly eccentric orbit, the cloud will be approximately 3100 Schwarzschild radii from the black hole and will move supersonically through the ambient hot gas with a velocity of v_p ~ 5400 km/s. A bow shock is likely to form in front of the cloud and could accelerate electrons to relativistic energies. We estimate via particle-in-cell simulations the energy distribution of the accelerated electrons and show tha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.4215","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":""},"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":"2026-05-18T01:56:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"atIrcKtd3dSS35OD7KOWgreoD/7JDRjgaMcZS5GY9pv7uHvzD2sqJLblmlb9Stq0eFhiJ6juGQQueDfU6Eh3Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T15:36:32.840845Z"},"content_sha256":"05666621c4a7efcaf7ebc37ee3570f52075da7d391269085be89ccc48b6bc843","schema_version":"1.0","event_id":"sha256:05666621c4a7efcaf7ebc37ee3570f52075da7d391269085be89ccc48b6bc843"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5EJH4MK6FRFZWNB6NJJBGZT4PM/bundle.json","state_url":"https://pith.science/pith/5EJH4MK6FRFZWNB6NJJBGZT4PM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5EJH4MK6FRFZWNB6NJJBGZT4PM/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":"2026-06-27T15:36:32Z","links":{"resolver":"https://pith.science/pith/5EJH4MK6FRFZWNB6NJJBGZT4PM","bundle":"https://pith.science/pith/5EJH4MK6FRFZWNB6NJJBGZT4PM/bundle.json","state":"https://pith.science/pith/5EJH4MK6FRFZWNB6NJJBGZT4PM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5EJH4MK6FRFZWNB6NJJBGZT4PM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:5EJH4MK6FRFZWNB6NJJBGZT4PM","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":"fc919353cbfa4b82e79a828694ffe10e0a23aaafb52bf65dab0ff1e3152bde01","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-17T21:00:00Z","title_canon_sha256":"8d807171a91d5cebe120fe34ee5a06b82bcf72b887634a2276e93097e98144b4"},"schema_version":"1.0","source":{"id":"1207.4215","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.4215","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"arxiv_version","alias_value":"1207.4215v2","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.4215","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"pith_short_12","alias_value":"5EJH4MK6FRFZ","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"5EJH4MK6FRFZWNB6","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"5EJH4MK6","created_at":"2026-05-18T12:26:53Z"}],"graph_snapshots":[{"event_id":"sha256:05666621c4a7efcaf7ebc37ee3570f52075da7d391269085be89ccc48b6bc843","target":"graph","created_at":"2026-05-18T01:56:17Z","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":"A dense ionized cloud of gas has been recently discovered to be moving directly toward the supermassive black hole, Sgr A*, at the Galactic Center. In June 2013, at the pericenter of its highly eccentric orbit, the cloud will be approximately 3100 Schwarzschild radii from the black hole and will move supersonically through the ambient hot gas with a velocity of v_p ~ 5400 km/s. A bow shock is likely to form in front of the cloud and could accelerate electrons to relativistic energies. We estimate via particle-in-cell simulations the energy distribution of the accelerated electrons and show tha","authors_text":"Feryal Ozel, Lorenzo Sironi, Ramesh Narayan","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-17T21:00:00Z","title":"Radio Synchrotron Emission from a Bow Shock around the Gas Cloud G2 Heading toward the Galactic Center"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.4215","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":"sha256:089ede79c7d1626635f5f59eff7f12c3e7b701636322910577d7f9be9230ef40","target":"record","created_at":"2026-05-18T01:56:17Z","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":"fc919353cbfa4b82e79a828694ffe10e0a23aaafb52bf65dab0ff1e3152bde01","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-17T21:00:00Z","title_canon_sha256":"8d807171a91d5cebe120fe34ee5a06b82bcf72b887634a2276e93097e98144b4"},"schema_version":"1.0","source":{"id":"1207.4215","kind":"arxiv","version":2}},"canonical_sha256":"e9127e315e2c4b9b343e6a5213667c7b30759b4820b0665697b3a775ca1f9e5d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e9127e315e2c4b9b343e6a5213667c7b30759b4820b0665697b3a775ca1f9e5d","first_computed_at":"2026-05-18T01:56:17.106905Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:17.106905Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TUNHgFr/jdaAXWUnzeIo2LfIVpjh1iSGmxgjDvrO1DKkSU8ckh31Qr49XJX1BGSByuHPHlXR35TToqvYIQAUDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:17.107467Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.4215","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:089ede79c7d1626635f5f59eff7f12c3e7b701636322910577d7f9be9230ef40","sha256:05666621c4a7efcaf7ebc37ee3570f52075da7d391269085be89ccc48b6bc843"],"state_sha256":"522f268bca475f464103193a34ff28583c8d214e687cb4bfa2a8cd55efc65596"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"55VZ6RyrpNidpExv7b32S2vRak4iZ8RiHWJ0zQbW3jh/1gFwvfjz43T4qHOk7vKEXeis6VgRDrCJTIYzmKiXAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T15:36:32.842787Z","bundle_sha256":"e021b7ceecd4754e84cf256d13413e581c654d945468b214afd80e6036b67d68"}}