{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:7ZCTMDVA6XN2AXUS3AIQTRC4PQ","short_pith_number":"pith:7ZCTMDVA","canonical_record":{"source":{"id":"astro-ph/0507147","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-07-06T20:03:33Z","cross_cats_sorted":[],"title_canon_sha256":"01f2bd0c2f80815d6fefbcd61a518791733941eeeed451b8f56bde7e0a6d3bb4","abstract_canon_sha256":"82a7594ddd51dd241e112c72ce8a57c60a5caf123f6e4d5e22ea2b27694087d3"},"schema_version":"1.0"},"canonical_sha256":"fe45360ea0f5dba05e92d81109c45c7c1b97579d0dde3e1a9a1a197482ac09e9","source":{"kind":"arxiv","id":"astro-ph/0507147","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0507147","created_at":"2026-07-04T17:15:44Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0507147v2","created_at":"2026-07-04T17:15:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0507147","created_at":"2026-07-04T17:15:44Z"},{"alias_kind":"pith_short_12","alias_value":"7ZCTMDVA6XN2","created_at":"2026-07-04T17:15:44Z"},{"alias_kind":"pith_short_16","alias_value":"7ZCTMDVA6XN2AXUS","created_at":"2026-07-04T17:15:44Z"},{"alias_kind":"pith_short_8","alias_value":"7ZCTMDVA","created_at":"2026-07-04T17:15:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:7ZCTMDVA6XN2AXUS3AIQTRC4PQ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0507147","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-07-06T20:03:33Z","cross_cats_sorted":[],"title_canon_sha256":"01f2bd0c2f80815d6fefbcd61a518791733941eeeed451b8f56bde7e0a6d3bb4","abstract_canon_sha256":"82a7594ddd51dd241e112c72ce8a57c60a5caf123f6e4d5e22ea2b27694087d3"},"schema_version":"1.0"},"canonical_sha256":"fe45360ea0f5dba05e92d81109c45c7c1b97579d0dde3e1a9a1a197482ac09e9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:15:44.114605Z","signature_b64":"95hQyMQFLmHOBSHvwmoLHmpOaDJcTVT9GlLxhFfMwTjaIAD/weGDxKsUE9Yy66Pukc8RFagWLHbgO46pv7V9DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fe45360ea0f5dba05e92d81109c45c7c1b97579d0dde3e1a9a1a197482ac09e9","last_reissued_at":"2026-07-04T17:15:44.114167Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:15:44.114167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0507147","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":"2026-07-04T17:15:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8Ui7BO3lKpJPBxoJ7UWR6G3IOY0VOKJFnAEC2gr2Hx2A11bD6dodIUDh5TctmdD7jWkN+JGL849T2jlahXTeDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T15:02:01.889399Z"},"content_sha256":"b42506407754d1e4afe931aa4e49cdb4c8760f3336ff7092f32b60ed7a1602c6","schema_version":"1.0","event_id":"sha256:b42506407754d1e4afe931aa4e49cdb4c8760f3336ff7092f32b60ed7a1602c6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:7ZCTMDVA6XN2AXUS3AIQTRC4PQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Late-time Radio Observations of 68 Type Ibc Supernovae: Strong Constraints on Off-Axis Gamma-ray Bursts","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. M. Soderberg, E. Berger, E. Nakar, S. R. Kulkarni","submitted_at":"2005-07-06T20:03:33Z","abstract_excerpt":"We present late-time radio observations of 68 local Type Ibc supernovae, including six events with broad optical absorption lines (``hypernovae''). None of these objects exhibit radio emission attributable to off-axis gamma-ray burst jets spreading into our line-of-sight. Comparison with our afterglow models reveals the following conclusions: (1) Less than $\\sim 10%$ of Type Ibc supernovae are associated with typical gamma-ray bursts initially directed away from our line-of-sight; this places an empirical constraint on the GRB beaming factor of $<f_b^{-1}> \\lesssim 10^4$ corresponding to an av"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0507147","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0507147/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":"2026-07-04T17:15:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"peIJ7id+/cDBXL/qd6Y2Kufyntn+MZMkPhJZK4DFqIY0xfh+TDgbTNa/ZGoc/Gpd4ljqGM01t4nhkxMHDq4ICw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T15:02:01.889886Z"},"content_sha256":"97b9e72a5e13fcf1b6ffdafc079d3b33091e935bb0af35ac015163290c2d5d13","schema_version":"1.0","event_id":"sha256:97b9e72a5e13fcf1b6ffdafc079d3b33091e935bb0af35ac015163290c2d5d13"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7ZCTMDVA6XN2AXUS3AIQTRC4PQ/bundle.json","state_url":"https://pith.science/pith/7ZCTMDVA6XN2AXUS3AIQTRC4PQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7ZCTMDVA6XN2AXUS3AIQTRC4PQ/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":"2026-08-06T15:02:01Z","links":{"resolver":"https://pith.science/pith/7ZCTMDVA6XN2AXUS3AIQTRC4PQ","bundle":"https://pith.science/pith/7ZCTMDVA6XN2AXUS3AIQTRC4PQ/bundle.json","state":"https://pith.science/pith/7ZCTMDVA6XN2AXUS3AIQTRC4PQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7ZCTMDVA6XN2AXUS3AIQTRC4PQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:7ZCTMDVA6XN2AXUS3AIQTRC4PQ","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":"82a7594ddd51dd241e112c72ce8a57c60a5caf123f6e4d5e22ea2b27694087d3","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-07-06T20:03:33Z","title_canon_sha256":"01f2bd0c2f80815d6fefbcd61a518791733941eeeed451b8f56bde7e0a6d3bb4"},"schema_version":"1.0","source":{"id":"astro-ph/0507147","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0507147","created_at":"2026-07-04T17:15:44Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0507147v2","created_at":"2026-07-04T17:15:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0507147","created_at":"2026-07-04T17:15:44Z"},{"alias_kind":"pith_short_12","alias_value":"7ZCTMDVA6XN2","created_at":"2026-07-04T17:15:44Z"},{"alias_kind":"pith_short_16","alias_value":"7ZCTMDVA6XN2AXUS","created_at":"2026-07-04T17:15:44Z"},{"alias_kind":"pith_short_8","alias_value":"7ZCTMDVA","created_at":"2026-07-04T17:15:44Z"}],"graph_snapshots":[{"event_id":"sha256:97b9e72a5e13fcf1b6ffdafc079d3b33091e935bb0af35ac015163290c2d5d13","target":"graph","created_at":"2026-07-04T17:15:44Z","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/0507147/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present late-time radio observations of 68 local Type Ibc supernovae, including six events with broad optical absorption lines (``hypernovae''). None of these objects exhibit radio emission attributable to off-axis gamma-ray burst jets spreading into our line-of-sight. Comparison with our afterglow models reveals the following conclusions: (1) Less than $\\sim 10%$ of Type Ibc supernovae are associated with typical gamma-ray bursts initially directed away from our line-of-sight; this places an empirical constraint on the GRB beaming factor of $<f_b^{-1}> \\lesssim 10^4$ corresponding to an av","authors_text":"A. M. Soderberg, E. Berger, E. Nakar, S. R. Kulkarni","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-07-06T20:03:33Z","title":"Late-time Radio Observations of 68 Type Ibc Supernovae: Strong Constraints on Off-Axis Gamma-ray Bursts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0507147","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:b42506407754d1e4afe931aa4e49cdb4c8760f3336ff7092f32b60ed7a1602c6","target":"record","created_at":"2026-07-04T17:15:44Z","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":"82a7594ddd51dd241e112c72ce8a57c60a5caf123f6e4d5e22ea2b27694087d3","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-07-06T20:03:33Z","title_canon_sha256":"01f2bd0c2f80815d6fefbcd61a518791733941eeeed451b8f56bde7e0a6d3bb4"},"schema_version":"1.0","source":{"id":"astro-ph/0507147","kind":"arxiv","version":2}},"canonical_sha256":"fe45360ea0f5dba05e92d81109c45c7c1b97579d0dde3e1a9a1a197482ac09e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe45360ea0f5dba05e92d81109c45c7c1b97579d0dde3e1a9a1a197482ac09e9","first_computed_at":"2026-07-04T17:15:44.114167Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:15:44.114167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"95hQyMQFLmHOBSHvwmoLHmpOaDJcTVT9GlLxhFfMwTjaIAD/weGDxKsUE9Yy66Pukc8RFagWLHbgO46pv7V9DA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:15:44.114605Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0507147","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b42506407754d1e4afe931aa4e49cdb4c8760f3336ff7092f32b60ed7a1602c6","sha256:97b9e72a5e13fcf1b6ffdafc079d3b33091e935bb0af35ac015163290c2d5d13"],"state_sha256":"6eea33d04645b78114529f7c8940d84e395032ad27177bee326bf249d392d684"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CBNpIHQWCuWHNdxcj4nnZwXO8LAGy3d/BTrd3qgEvsgGWBQGW84WSk878IJHqmGoDIfR3b+Rvta8DgY2NnqiAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T15:02:01.894403Z","bundle_sha256":"ff8d494452f35dca01d452a024233f6e0f03b1ff09b7a002e6c3db7adf920e3d"}}