{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:3F36X36MLLNMRPVM2CUF5ELQZS","short_pith_number":"pith:3F36X36M","canonical_record":{"source":{"id":"1302.4878","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-02-20T11:34:58Z","cross_cats_sorted":[],"title_canon_sha256":"02dbccfe1e20006426a2fe7a297081b532f8b610e89e8ae5ff3bb72f467612aa","abstract_canon_sha256":"39710e0e95b16daf25bf78a947b8af232d8c2c43cee6f7aaccf6f4011f552680"},"schema_version":"1.0"},"canonical_sha256":"d977ebefcc5adac8beacd0a85e9170ccbff905c22c83b8877b7e9d3dcb93f7ab","source":{"kind":"arxiv","id":"1302.4878","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.4878","created_at":"2026-05-18T03:28:17Z"},{"alias_kind":"arxiv_version","alias_value":"1302.4878v2","created_at":"2026-05-18T03:28:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.4878","created_at":"2026-05-18T03:28:17Z"},{"alias_kind":"pith_short_12","alias_value":"3F36X36MLLNM","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"3F36X36MLLNMRPVM","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"3F36X36M","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:3F36X36MLLNMRPVM2CUF5ELQZS","target":"record","payload":{"canonical_record":{"source":{"id":"1302.4878","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-02-20T11:34:58Z","cross_cats_sorted":[],"title_canon_sha256":"02dbccfe1e20006426a2fe7a297081b532f8b610e89e8ae5ff3bb72f467612aa","abstract_canon_sha256":"39710e0e95b16daf25bf78a947b8af232d8c2c43cee6f7aaccf6f4011f552680"},"schema_version":"1.0"},"canonical_sha256":"d977ebefcc5adac8beacd0a85e9170ccbff905c22c83b8877b7e9d3dcb93f7ab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:28:17.047660Z","signature_b64":"/BY2Bq+A+XqRvklR7TCK3b7NsblbTYIDBW0f1NCXWuYVSIY0nvMHtSUVjjnO8h5rYc5ZR2TtKWCBktKjLOHSDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d977ebefcc5adac8beacd0a85e9170ccbff905c22c83b8877b7e9d3dcb93f7ab","last_reissued_at":"2026-05-18T03:28:17.047086Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:28:17.047086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.4878","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":"2026-05-18T03:28:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"83Eo+AuumNZSHQtMkSYVQjKJFVXNdP4O+ZV8TdTmLCeeFs18D+NZr9pSZLfm7n04Q7tFd4hffOb/O5Z7XvkzBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:36:33.646969Z"},"content_sha256":"9cae9bd8b2f25ef8ab17230d0a10fb55bb47ba517b4e267674cc87a173cf1788","schema_version":"1.0","event_id":"sha256:9cae9bd8b2f25ef8ab17230d0a10fb55bb47ba517b4e267674cc87a173cf1788"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:3F36X36MLLNMRPVM2CUF5ELQZS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Giant X-ray Bump in GRB 121027A: Evidence for Fall-back Disk Accretion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Shu-Jin Hou, Wei-Hua Lei, Xue-Feng Wu","submitted_at":"2013-02-20T11:34:58Z","abstract_excerpt":"A particularly interesting discovery in observations of GRB 121027A is that of a giant X-ray bump detected by the Swift/X-Ray Telescope. The X-ray afterglow re-brightens sharply at about 1000 s after the trigger by more than two orders of magnitude in less than 200 s. This X-ray bump lasts for more than 10 ks. It is quite different from typical X-ray flares. In this Letter we propose a fall-back accretion model to interpret this X-ray bump within the context of the collapse of a massive star for a long-duration gamma-ray burst. The required fall-back radius of about 3.5e10 cm and mass of about"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.4878","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":"2026-05-18T03:28:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NXOUIRfrC1qDbcEtbT0CtHe+FiajqYgrLZbyLCE3BZazpo+EfEeLoZshTugpjKlBU/xjqbWTmdRmFBKAA8yLDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:36:33.647480Z"},"content_sha256":"bf4ae06c9f28ff22dd01d3a3eb4d0d780a18737597318abf9628f95ed8f63410","schema_version":"1.0","event_id":"sha256:bf4ae06c9f28ff22dd01d3a3eb4d0d780a18737597318abf9628f95ed8f63410"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3F36X36MLLNMRPVM2CUF5ELQZS/bundle.json","state_url":"https://pith.science/pith/3F36X36MLLNMRPVM2CUF5ELQZS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3F36X36MLLNMRPVM2CUF5ELQZS/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":"2026-05-26T03:36:33Z","links":{"resolver":"https://pith.science/pith/3F36X36MLLNMRPVM2CUF5ELQZS","bundle":"https://pith.science/pith/3F36X36MLLNMRPVM2CUF5ELQZS/bundle.json","state":"https://pith.science/pith/3F36X36MLLNMRPVM2CUF5ELQZS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3F36X36MLLNMRPVM2CUF5ELQZS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:3F36X36MLLNMRPVM2CUF5ELQZS","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":"39710e0e95b16daf25bf78a947b8af232d8c2c43cee6f7aaccf6f4011f552680","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-02-20T11:34:58Z","title_canon_sha256":"02dbccfe1e20006426a2fe7a297081b532f8b610e89e8ae5ff3bb72f467612aa"},"schema_version":"1.0","source":{"id":"1302.4878","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.4878","created_at":"2026-05-18T03:28:17Z"},{"alias_kind":"arxiv_version","alias_value":"1302.4878v2","created_at":"2026-05-18T03:28:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.4878","created_at":"2026-05-18T03:28:17Z"},{"alias_kind":"pith_short_12","alias_value":"3F36X36MLLNM","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"3F36X36MLLNMRPVM","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"3F36X36M","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:bf4ae06c9f28ff22dd01d3a3eb4d0d780a18737597318abf9628f95ed8f63410","target":"graph","created_at":"2026-05-18T03:28:17Z","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 particularly interesting discovery in observations of GRB 121027A is that of a giant X-ray bump detected by the Swift/X-Ray Telescope. The X-ray afterglow re-brightens sharply at about 1000 s after the trigger by more than two orders of magnitude in less than 200 s. This X-ray bump lasts for more than 10 ks. It is quite different from typical X-ray flares. In this Letter we propose a fall-back accretion model to interpret this X-ray bump within the context of the collapse of a massive star for a long-duration gamma-ray burst. The required fall-back radius of about 3.5e10 cm and mass of about","authors_text":"Shu-Jin Hou, Wei-Hua Lei, Xue-Feng Wu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-02-20T11:34:58Z","title":"Giant X-ray Bump in GRB 121027A: Evidence for Fall-back Disk Accretion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.4878","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":"sha256:9cae9bd8b2f25ef8ab17230d0a10fb55bb47ba517b4e267674cc87a173cf1788","target":"record","created_at":"2026-05-18T03:28:17Z","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":"39710e0e95b16daf25bf78a947b8af232d8c2c43cee6f7aaccf6f4011f552680","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-02-20T11:34:58Z","title_canon_sha256":"02dbccfe1e20006426a2fe7a297081b532f8b610e89e8ae5ff3bb72f467612aa"},"schema_version":"1.0","source":{"id":"1302.4878","kind":"arxiv","version":2}},"canonical_sha256":"d977ebefcc5adac8beacd0a85e9170ccbff905c22c83b8877b7e9d3dcb93f7ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d977ebefcc5adac8beacd0a85e9170ccbff905c22c83b8877b7e9d3dcb93f7ab","first_computed_at":"2026-05-18T03:28:17.047086Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:28:17.047086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/BY2Bq+A+XqRvklR7TCK3b7NsblbTYIDBW0f1NCXWuYVSIY0nvMHtSUVjjnO8h5rYc5ZR2TtKWCBktKjLOHSDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:28:17.047660Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.4878","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9cae9bd8b2f25ef8ab17230d0a10fb55bb47ba517b4e267674cc87a173cf1788","sha256:bf4ae06c9f28ff22dd01d3a3eb4d0d780a18737597318abf9628f95ed8f63410"],"state_sha256":"59d48d3065fbd055bf2012a960cc1a62a273cae08a7f5bafec7105f1af23889b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"58YGGPT6ff1pCoQPTzEoiI0gBQUhJgPH4RFYnQCIdUvUIcHcDdqNJpXMJl3SG3eZl7u3sk6fyMgBC8mDUP5aBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T03:36:33.650522Z","bundle_sha256":"4fbe39c86298705be8fb06e7c39b38d79b03feed8ba0b4cc58d82b7726c05272"}}