{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:7ZDAP72YITRK7K4VOIU2Z3D3MG","short_pith_number":"pith:7ZDAP72Y","canonical_record":{"source":{"id":"astro-ph/9703133","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-03-20T22:33:27Z","cross_cats_sorted":[],"title_canon_sha256":"1eca4667640d2b23836d8169429f58165f6f2f00f84b59e269d4891a939525a0","abstract_canon_sha256":"6d967feb30f6ef28de448d9c219bae1c39b85b3cef979fcfdbadefc2758420d8"},"schema_version":"1.0"},"canonical_sha256":"fe4607ff5844e2afab957229acec7b61a13af3a1892a8b43856d938174f44c2e","source":{"kind":"arxiv","id":"astro-ph/9703133","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9703133","created_at":"2026-07-04T16:02:55Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9703133v1","created_at":"2026-07-04T16:02:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9703133","created_at":"2026-07-04T16:02:55Z"},{"alias_kind":"pith_short_12","alias_value":"7ZDAP72YITRK","created_at":"2026-07-04T16:02:55Z"},{"alias_kind":"pith_short_16","alias_value":"7ZDAP72YITRK7K4V","created_at":"2026-07-04T16:02:55Z"},{"alias_kind":"pith_short_8","alias_value":"7ZDAP72Y","created_at":"2026-07-04T16:02:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:7ZDAP72YITRK7K4VOIU2Z3D3MG","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9703133","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-03-20T22:33:27Z","cross_cats_sorted":[],"title_canon_sha256":"1eca4667640d2b23836d8169429f58165f6f2f00f84b59e269d4891a939525a0","abstract_canon_sha256":"6d967feb30f6ef28de448d9c219bae1c39b85b3cef979fcfdbadefc2758420d8"},"schema_version":"1.0"},"canonical_sha256":"fe4607ff5844e2afab957229acec7b61a13af3a1892a8b43856d938174f44c2e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:02:55.829761Z","signature_b64":"IKorkbcqH/60pOT3bUcF0Jcp60N0Hk5O0j2Bl3Lk5lR6xv3t6DPLceZHtShSSYP2j9bpaa/v9E9mcfOcG9+yBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fe4607ff5844e2afab957229acec7b61a13af3a1892a8b43856d938174f44c2e","last_reissued_at":"2026-07-04T16:02:55.829364Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:02:55.829364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9703133","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":"2026-07-04T16:02:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C6iJ5B6yMcF3toVQz7g7SX4iI2zncGIkngRS7pzCQPzOCWzSq7McVCUujLzBK3OVYjDmdH0a0hbaHb9EzXs2Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T15:39:55.813336Z"},"content_sha256":"2264405858d97cf727ddcfd85d6f86623bd66966fa19501c543a80e38951cf0c","schema_version":"1.0","event_id":"sha256:2264405858d97cf727ddcfd85d6f86623bd66966fa19501c543a80e38951cf0c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:7ZDAP72YITRK7K4VOIU2Z3D3MG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Implications of the Visible and X-Ray Counterparts to GRB970228","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J. I. Katz, R. Sari, T. Piran","submitted_at":"1997-03-20T22:33:27Z","abstract_excerpt":"The gamma-ray burst source GRB970228 has been observed after a delay of 8--12 hours in X-rays and after one day in visible and near infrared light. This marks the first detection of emission at lower frequencies following the gamma-ray observation of a GRB and the first detection of any visible counterpart to a GRB. We consider possible delayed visible and X-ray emission mechanisms, and conclude that the intrinsic gamma-ray activity continued at a much reduced intensity for at least a day. There are hints of such continued activity in other GRB, and future observations can decide if this is tr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9703133","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/astro-ph/9703133/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":"2026-07-04T16:02:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oPbphMRz8ujDCr53IT8S27Y5IbswjStul+nw63KkssfKG/mIZiSPDxfBT/lBJ7eaE70yS07X1MnQEpYwRXrKBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T15:39:55.813846Z"},"content_sha256":"9db80d5a9d4c2b6ee474561b122e7d469d12b9052903dd827fe20acef36382c1","schema_version":"1.0","event_id":"sha256:9db80d5a9d4c2b6ee474561b122e7d469d12b9052903dd827fe20acef36382c1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7ZDAP72YITRK7K4VOIU2Z3D3MG/bundle.json","state_url":"https://pith.science/pith/7ZDAP72YITRK7K4VOIU2Z3D3MG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7ZDAP72YITRK7K4VOIU2Z3D3MG/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":"2026-07-31T15:39:55Z","links":{"resolver":"https://pith.science/pith/7ZDAP72YITRK7K4VOIU2Z3D3MG","bundle":"https://pith.science/pith/7ZDAP72YITRK7K4VOIU2Z3D3MG/bundle.json","state":"https://pith.science/pith/7ZDAP72YITRK7K4VOIU2Z3D3MG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7ZDAP72YITRK7K4VOIU2Z3D3MG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:7ZDAP72YITRK7K4VOIU2Z3D3MG","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":"6d967feb30f6ef28de448d9c219bae1c39b85b3cef979fcfdbadefc2758420d8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-03-20T22:33:27Z","title_canon_sha256":"1eca4667640d2b23836d8169429f58165f6f2f00f84b59e269d4891a939525a0"},"schema_version":"1.0","source":{"id":"astro-ph/9703133","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9703133","created_at":"2026-07-04T16:02:55Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9703133v1","created_at":"2026-07-04T16:02:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9703133","created_at":"2026-07-04T16:02:55Z"},{"alias_kind":"pith_short_12","alias_value":"7ZDAP72YITRK","created_at":"2026-07-04T16:02:55Z"},{"alias_kind":"pith_short_16","alias_value":"7ZDAP72YITRK7K4V","created_at":"2026-07-04T16:02:55Z"},{"alias_kind":"pith_short_8","alias_value":"7ZDAP72Y","created_at":"2026-07-04T16:02:55Z"}],"graph_snapshots":[{"event_id":"sha256:9db80d5a9d4c2b6ee474561b122e7d469d12b9052903dd827fe20acef36382c1","target":"graph","created_at":"2026-07-04T16:02:55Z","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/astro-ph/9703133/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The gamma-ray burst source GRB970228 has been observed after a delay of 8--12 hours in X-rays and after one day in visible and near infrared light. This marks the first detection of emission at lower frequencies following the gamma-ray observation of a GRB and the first detection of any visible counterpart to a GRB. We consider possible delayed visible and X-ray emission mechanisms, and conclude that the intrinsic gamma-ray activity continued at a much reduced intensity for at least a day. There are hints of such continued activity in other GRB, and future observations can decide if this is tr","authors_text":"J. I. Katz, R. Sari, T. Piran","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1997-03-20T22:33:27Z","title":"Implications of the Visible and X-Ray Counterparts to GRB970228"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9703133","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":"sha256:2264405858d97cf727ddcfd85d6f86623bd66966fa19501c543a80e38951cf0c","target":"record","created_at":"2026-07-04T16:02:55Z","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":"6d967feb30f6ef28de448d9c219bae1c39b85b3cef979fcfdbadefc2758420d8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-03-20T22:33:27Z","title_canon_sha256":"1eca4667640d2b23836d8169429f58165f6f2f00f84b59e269d4891a939525a0"},"schema_version":"1.0","source":{"id":"astro-ph/9703133","kind":"arxiv","version":1}},"canonical_sha256":"fe4607ff5844e2afab957229acec7b61a13af3a1892a8b43856d938174f44c2e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe4607ff5844e2afab957229acec7b61a13af3a1892a8b43856d938174f44c2e","first_computed_at":"2026-07-04T16:02:55.829364Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:02:55.829364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IKorkbcqH/60pOT3bUcF0Jcp60N0Hk5O0j2Bl3Lk5lR6xv3t6DPLceZHtShSSYP2j9bpaa/v9E9mcfOcG9+yBg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:02:55.829761Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9703133","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2264405858d97cf727ddcfd85d6f86623bd66966fa19501c543a80e38951cf0c","sha256:9db80d5a9d4c2b6ee474561b122e7d469d12b9052903dd827fe20acef36382c1"],"state_sha256":"cec0c49c4a413da245a9c754fba603275dac0bbb087b5774f2ef7deedd6a2603"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P8kdAmqE3g2Y5FZ7ruJlNpQisjh0Kju3Pcws359QiosvJ3b+L1MnSkj5usXT3+AyH0aYaLfLzQbNwhKD9JJ/CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T15:39:55.818747Z","bundle_sha256":"d984cdc688fca79624b59604fa829a294a73565655c015af314c076eeb425d17"}}