{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:7OKBGKHGBMGEUISH5YSLRTVP4R","short_pith_number":"pith:7OKBGKHG","canonical_record":{"source":{"id":"2607.24045","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-27T06:37:09Z","cross_cats_sorted":[],"title_canon_sha256":"a51515ceaae69699c4dd01d7cf4a1e393a7c8cc0e4bc3a23e250eb96f7e325a1","abstract_canon_sha256":"a71e3738699944e0a56f79ba6031fd551ed76a2c4ce8f10436201476d36d1f81"},"schema_version":"1.0"},"canonical_sha256":"fb941328e60b0c4a2247ee24b8ceafe466408f0a17160616d889681f92a9f1cd","source":{"kind":"arxiv","id":"2607.24045","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.24045","created_at":"2026-07-28T01:23:42Z"},{"alias_kind":"arxiv_version","alias_value":"2607.24045v1","created_at":"2026-07-28T01:23:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.24045","created_at":"2026-07-28T01:23:42Z"},{"alias_kind":"pith_short_12","alias_value":"7OKBGKHGBMGE","created_at":"2026-07-28T01:23:42Z"},{"alias_kind":"pith_short_16","alias_value":"7OKBGKHGBMGEUISH","created_at":"2026-07-28T01:23:42Z"},{"alias_kind":"pith_short_8","alias_value":"7OKBGKHG","created_at":"2026-07-28T01:23:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:7OKBGKHGBMGEUISH5YSLRTVP4R","target":"record","payload":{"canonical_record":{"source":{"id":"2607.24045","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-27T06:37:09Z","cross_cats_sorted":[],"title_canon_sha256":"a51515ceaae69699c4dd01d7cf4a1e393a7c8cc0e4bc3a23e250eb96f7e325a1","abstract_canon_sha256":"a71e3738699944e0a56f79ba6031fd551ed76a2c4ce8f10436201476d36d1f81"},"schema_version":"1.0"},"canonical_sha256":"fb941328e60b0c4a2247ee24b8ceafe466408f0a17160616d889681f92a9f1cd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-28T01:23:42.761526Z","signature_b64":"HEv7fhg8PzBFBQWEBacEAtGtzFFuW97tHXeIE0hvEkWnw/yfTnA5P7uU0eQThuc8DzFJaP4KMlVo2nXbNxgjDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fb941328e60b0c4a2247ee24b8ceafe466408f0a17160616d889681f92a9f1cd","last_reissued_at":"2026-07-28T01:23:42.760684Z","signature_status":"signed_v1","first_computed_at":"2026-07-28T01:23:42.760684Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.24045","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":"2026-07-28T01:23:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pv3VCa1RrbFdKto9kV+oYh2n2z7DGe6Z4q+pWXH6rHUKLdnrQNsN8DC/3sHKIpaPspGsDK0vGN/gNmUf4dFZCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T15:57:26.494288Z"},"content_sha256":"75e6ca3be7f3f3d157de975656b4463bc4a683bf1b3f8f3f503cb09070fd0ab0","schema_version":"1.0","event_id":"sha256:75e6ca3be7f3f3d157de975656b4463bc4a683bf1b3f8f3f503cb09070fd0ab0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:7OKBGKHGBMGEUISH5YSLRTVP4R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Shock breakout from mildly relativistic ejecta in a dense wind: the case of EP260321a/SN~2026gzf","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Akihiro Suzuki, Keiichi Maeda, Toshikazu Shigeyama","submitted_at":"2026-07-27T06:37:09Z","abstract_excerpt":"We present shock breakout (SBO) modeling of the recently discovered X-ray transient EP260321a detected by the \\textit{Einstein Probe} mission. Our semi-analytic model, based on our previous work, follows the interaction between a supernova ejecta with a mildly relativistic outer envelope and a dense, wind-like circumstellar medium (CSM) by using a thin-shell approximation that incorporates relativistic effects. We find that the observed properties of the X-ray emission are well explained by the breakout emission powered by a high-velocity envelope with a kinetic energy of $\\sim3.5\\times10^{49}"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.24045","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/2607.24045/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":"2026-07-28T01:23:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IxQN8T5saLQlzr+x7p/l2aPlefDgwOmip/vFjTS2CZC239kwqeNdcFAVwRYNNz6Z21lTgXUOyPJ8d+2gHSibCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T15:57:26.494810Z"},"content_sha256":"4b3e76a804917e381f48aa798d678c8ac55bd9fb622af3962e762f26d9d1916d","schema_version":"1.0","event_id":"sha256:4b3e76a804917e381f48aa798d678c8ac55bd9fb622af3962e762f26d9d1916d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7OKBGKHGBMGEUISH5YSLRTVP4R/bundle.json","state_url":"https://pith.science/pith/7OKBGKHGBMGEUISH5YSLRTVP4R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7OKBGKHGBMGEUISH5YSLRTVP4R/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":"2026-08-15T15:57:26Z","links":{"resolver":"https://pith.science/pith/7OKBGKHGBMGEUISH5YSLRTVP4R","bundle":"https://pith.science/pith/7OKBGKHGBMGEUISH5YSLRTVP4R/bundle.json","state":"https://pith.science/pith/7OKBGKHGBMGEUISH5YSLRTVP4R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7OKBGKHGBMGEUISH5YSLRTVP4R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:7OKBGKHGBMGEUISH5YSLRTVP4R","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":"a71e3738699944e0a56f79ba6031fd551ed76a2c4ce8f10436201476d36d1f81","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-27T06:37:09Z","title_canon_sha256":"a51515ceaae69699c4dd01d7cf4a1e393a7c8cc0e4bc3a23e250eb96f7e325a1"},"schema_version":"1.0","source":{"id":"2607.24045","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.24045","created_at":"2026-07-28T01:23:42Z"},{"alias_kind":"arxiv_version","alias_value":"2607.24045v1","created_at":"2026-07-28T01:23:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.24045","created_at":"2026-07-28T01:23:42Z"},{"alias_kind":"pith_short_12","alias_value":"7OKBGKHGBMGE","created_at":"2026-07-28T01:23:42Z"},{"alias_kind":"pith_short_16","alias_value":"7OKBGKHGBMGEUISH","created_at":"2026-07-28T01:23:42Z"},{"alias_kind":"pith_short_8","alias_value":"7OKBGKHG","created_at":"2026-07-28T01:23:42Z"}],"graph_snapshots":[{"event_id":"sha256:4b3e76a804917e381f48aa798d678c8ac55bd9fb622af3962e762f26d9d1916d","target":"graph","created_at":"2026-07-28T01:23:42Z","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/2607.24045/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present shock breakout (SBO) modeling of the recently discovered X-ray transient EP260321a detected by the \\textit{Einstein Probe} mission. Our semi-analytic model, based on our previous work, follows the interaction between a supernova ejecta with a mildly relativistic outer envelope and a dense, wind-like circumstellar medium (CSM) by using a thin-shell approximation that incorporates relativistic effects. We find that the observed properties of the X-ray emission are well explained by the breakout emission powered by a high-velocity envelope with a kinetic energy of $\\sim3.5\\times10^{49}","authors_text":"Akihiro Suzuki, Keiichi Maeda, Toshikazu Shigeyama","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-27T06:37:09Z","title":"Shock breakout from mildly relativistic ejecta in a dense wind: the case of EP260321a/SN~2026gzf"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.24045","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":"sha256:75e6ca3be7f3f3d157de975656b4463bc4a683bf1b3f8f3f503cb09070fd0ab0","target":"record","created_at":"2026-07-28T01:23:42Z","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":"a71e3738699944e0a56f79ba6031fd551ed76a2c4ce8f10436201476d36d1f81","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-27T06:37:09Z","title_canon_sha256":"a51515ceaae69699c4dd01d7cf4a1e393a7c8cc0e4bc3a23e250eb96f7e325a1"},"schema_version":"1.0","source":{"id":"2607.24045","kind":"arxiv","version":1}},"canonical_sha256":"fb941328e60b0c4a2247ee24b8ceafe466408f0a17160616d889681f92a9f1cd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fb941328e60b0c4a2247ee24b8ceafe466408f0a17160616d889681f92a9f1cd","first_computed_at":"2026-07-28T01:23:42.760684Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-28T01:23:42.760684Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HEv7fhg8PzBFBQWEBacEAtGtzFFuW97tHXeIE0hvEkWnw/yfTnA5P7uU0eQThuc8DzFJaP4KMlVo2nXbNxgjDA==","signature_status":"signed_v1","signed_at":"2026-07-28T01:23:42.761526Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.24045","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:75e6ca3be7f3f3d157de975656b4463bc4a683bf1b3f8f3f503cb09070fd0ab0","sha256:4b3e76a804917e381f48aa798d678c8ac55bd9fb622af3962e762f26d9d1916d"],"state_sha256":"b325ba0ee5bc237530f3a1307cfb9dea795ab02df9264ace9d7bc7c48660318f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2r8ax3qphyYSYd2L1aUm7AN44E/3/MQ+kGhu9dKjJy7tMTJhL9aRUvTqziCHINeNJJTnKuc2hnDoCFtye/DOAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T15:57:26.498564Z","bundle_sha256":"5e98066f7cd0ff83689221d9a4eac2e4d04bd836498a3710a868a6b79d743327"}}