{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:FX4SPAN76ZHWH3P5IQX225FXKD","short_pith_number":"pith:FX4SPAN7","canonical_record":{"source":{"id":"2209.09763","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-09-20T14:45:54Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"b4b4d6fca1f505793c0115011cdb7f3ba8a164e56cfd7e93a1094def9eded3fd","abstract_canon_sha256":"204f8ba8d804e7798f75c4c70098e474f5f3b7edd8584a65fc984df74922658b"},"schema_version":"1.0"},"canonical_sha256":"2df92781bff64f63edfd442fad74b750d38bb969feae57f811177c3e4e13b79d","source":{"kind":"arxiv","id":"2209.09763","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2209.09763","created_at":"2026-07-05T05:57:56Z"},{"alias_kind":"arxiv_version","alias_value":"2209.09763v1","created_at":"2026-07-05T05:57:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2209.09763","created_at":"2026-07-05T05:57:56Z"},{"alias_kind":"pith_short_12","alias_value":"FX4SPAN76ZHW","created_at":"2026-07-05T05:57:56Z"},{"alias_kind":"pith_short_16","alias_value":"FX4SPAN76ZHWH3P5","created_at":"2026-07-05T05:57:56Z"},{"alias_kind":"pith_short_8","alias_value":"FX4SPAN7","created_at":"2026-07-05T05:57:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:FX4SPAN76ZHWH3P5IQX225FXKD","target":"record","payload":{"canonical_record":{"source":{"id":"2209.09763","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-09-20T14:45:54Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"b4b4d6fca1f505793c0115011cdb7f3ba8a164e56cfd7e93a1094def9eded3fd","abstract_canon_sha256":"204f8ba8d804e7798f75c4c70098e474f5f3b7edd8584a65fc984df74922658b"},"schema_version":"1.0"},"canonical_sha256":"2df92781bff64f63edfd442fad74b750d38bb969feae57f811177c3e4e13b79d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:57:56.937403Z","signature_b64":"0tPJJT/Kf4Y/EKT9411hBGIfOuH24t8T36egTOIeTFtgDyL6/6B79XH0SXsENuGL4jyc68fJyI3CiQzKhb9MBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2df92781bff64f63edfd442fad74b750d38bb969feae57f811177c3e4e13b79d","last_reissued_at":"2026-07-05T05:57:56.936955Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:57:56.936955Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2209.09763","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":"2026-07-05T05:57:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UGf30AJXKbmZnoSHra2gmw4A5ApER8+Cf5Yiu1fBcRzYNOUdT+CcebMXbYXMWTv+PJ0k7MBbh+RK2KOyIaaRAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T21:07:38.720573Z"},"content_sha256":"34179db43a356ea66f52873f66cda89f4e313aaabb2a3e1027500c6866153e87","schema_version":"1.0","event_id":"sha256:34179db43a356ea66f52873f66cda89f4e313aaabb2a3e1027500c6866153e87"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:FX4SPAN76ZHWH3P5IQX225FXKD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Einstein Probe Mission","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.HE","authors_text":"Chen Zhang, Weimin Yuan, Yong Chen, Zhixing Ling","submitted_at":"2022-09-20T14:45:54Z","abstract_excerpt":"The Einstein Probe (EP) is a mission designed to monitor the sky in the soft X-ray band. It will perform systematic surveys and characterisation of high-energy transients and monitoring of variable objects at unprecedented sensitivity and monitoring cadences. It has a large instantaneous field-of-view (3,600 sq. deg.), that is realised via the lobster-eye micro-pore X-ray focusing optics. EP also carries a conventional X-ray focusing telescope with a larger effective area to perform followup observations and precise positioning of newly-discovered transients. Alerts for transient objects will "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2209.09763","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/2209.09763/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":"2026-07-05T05:57:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R8HUzFnODiSnDsSJRk9LITWHGoXvfKEcGAYmkndTLi8thrUE4fJ+vak5luMwEjlGY4hk8F+CS5rDmh5JtzRuAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T21:07:38.721546Z"},"content_sha256":"27d3aec531e6d989a4a71ae5d7ce464b27d8ddb9933ad6bfc9187fb4d24b3d8b","schema_version":"1.0","event_id":"sha256:27d3aec531e6d989a4a71ae5d7ce464b27d8ddb9933ad6bfc9187fb4d24b3d8b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FX4SPAN76ZHWH3P5IQX225FXKD/bundle.json","state_url":"https://pith.science/pith/FX4SPAN76ZHWH3P5IQX225FXKD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FX4SPAN76ZHWH3P5IQX225FXKD/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":"2026-08-01T21:07:38Z","links":{"resolver":"https://pith.science/pith/FX4SPAN76ZHWH3P5IQX225FXKD","bundle":"https://pith.science/pith/FX4SPAN76ZHWH3P5IQX225FXKD/bundle.json","state":"https://pith.science/pith/FX4SPAN76ZHWH3P5IQX225FXKD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FX4SPAN76ZHWH3P5IQX225FXKD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:FX4SPAN76ZHWH3P5IQX225FXKD","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":"204f8ba8d804e7798f75c4c70098e474f5f3b7edd8584a65fc984df74922658b","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-09-20T14:45:54Z","title_canon_sha256":"b4b4d6fca1f505793c0115011cdb7f3ba8a164e56cfd7e93a1094def9eded3fd"},"schema_version":"1.0","source":{"id":"2209.09763","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2209.09763","created_at":"2026-07-05T05:57:56Z"},{"alias_kind":"arxiv_version","alias_value":"2209.09763v1","created_at":"2026-07-05T05:57:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2209.09763","created_at":"2026-07-05T05:57:56Z"},{"alias_kind":"pith_short_12","alias_value":"FX4SPAN76ZHW","created_at":"2026-07-05T05:57:56Z"},{"alias_kind":"pith_short_16","alias_value":"FX4SPAN76ZHWH3P5","created_at":"2026-07-05T05:57:56Z"},{"alias_kind":"pith_short_8","alias_value":"FX4SPAN7","created_at":"2026-07-05T05:57:56Z"}],"graph_snapshots":[{"event_id":"sha256:27d3aec531e6d989a4a71ae5d7ce464b27d8ddb9933ad6bfc9187fb4d24b3d8b","target":"graph","created_at":"2026-07-05T05:57:56Z","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/2209.09763/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Einstein Probe (EP) is a mission designed to monitor the sky in the soft X-ray band. It will perform systematic surveys and characterisation of high-energy transients and monitoring of variable objects at unprecedented sensitivity and monitoring cadences. It has a large instantaneous field-of-view (3,600 sq. deg.), that is realised via the lobster-eye micro-pore X-ray focusing optics. EP also carries a conventional X-ray focusing telescope with a larger effective area to perform followup observations and precise positioning of newly-discovered transients. Alerts for transient objects will ","authors_text":"Chen Zhang, Weimin Yuan, Yong Chen, Zhixing Ling","cross_cats":["astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-09-20T14:45:54Z","title":"The Einstein Probe Mission"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2209.09763","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":"sha256:34179db43a356ea66f52873f66cda89f4e313aaabb2a3e1027500c6866153e87","target":"record","created_at":"2026-07-05T05:57:56Z","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":"204f8ba8d804e7798f75c4c70098e474f5f3b7edd8584a65fc984df74922658b","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-09-20T14:45:54Z","title_canon_sha256":"b4b4d6fca1f505793c0115011cdb7f3ba8a164e56cfd7e93a1094def9eded3fd"},"schema_version":"1.0","source":{"id":"2209.09763","kind":"arxiv","version":1}},"canonical_sha256":"2df92781bff64f63edfd442fad74b750d38bb969feae57f811177c3e4e13b79d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2df92781bff64f63edfd442fad74b750d38bb969feae57f811177c3e4e13b79d","first_computed_at":"2026-07-05T05:57:56.936955Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:57:56.936955Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0tPJJT/Kf4Y/EKT9411hBGIfOuH24t8T36egTOIeTFtgDyL6/6B79XH0SXsENuGL4jyc68fJyI3CiQzKhb9MBw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:57:56.937403Z","signed_message":"canonical_sha256_bytes"},"source_id":"2209.09763","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:34179db43a356ea66f52873f66cda89f4e313aaabb2a3e1027500c6866153e87","sha256:27d3aec531e6d989a4a71ae5d7ce464b27d8ddb9933ad6bfc9187fb4d24b3d8b"],"state_sha256":"a959a7ace3e485ab5e38a75b81e2a3fabbcb90e6ac04e5b70b838b66029db61a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Afud3jmSD7Ehy7pK26MFGYbmFUaLABkTk4fVPMgVRHgsu+XRQ8vH3KXGjxrjnsaKTnw+MzTzkX8wmgjFtsxSBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T21:07:38.728182Z","bundle_sha256":"3893a42f3bdfd5f2eb62cee3d6120d14bd33e638c98366823461ee97ab607616"}}