{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:6I5Y2YHMN7C7UI2XVEMQKDKW3X","short_pith_number":"pith:6I5Y2YHM","canonical_record":{"source":{"id":"2408.00026","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-07-31T08:16:30Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"a838037d9acfa16c2697ebf2856a967a00c1f62db065053a0d71e74fbfa6fb29","abstract_canon_sha256":"fbe2866e8cac00dc6984ad359d91e36311a406036c9db6f9cfa4868bcaff97e4"},"schema_version":"1.0"},"canonical_sha256":"f23b8d60ec6fc5fa2357a919050d56dded44f2c1be0b161a071e1a21a242cf43","source":{"kind":"arxiv","id":"2408.00026","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.00026","created_at":"2026-07-05T08:50:44Z"},{"alias_kind":"arxiv_version","alias_value":"2408.00026v1","created_at":"2026-07-05T08:50:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.00026","created_at":"2026-07-05T08:50:44Z"},{"alias_kind":"pith_short_12","alias_value":"6I5Y2YHMN7C7","created_at":"2026-07-05T08:50:44Z"},{"alias_kind":"pith_short_16","alias_value":"6I5Y2YHMN7C7UI2X","created_at":"2026-07-05T08:50:44Z"},{"alias_kind":"pith_short_8","alias_value":"6I5Y2YHM","created_at":"2026-07-05T08:50:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:6I5Y2YHMN7C7UI2XVEMQKDKW3X","target":"record","payload":{"canonical_record":{"source":{"id":"2408.00026","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-07-31T08:16:30Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"a838037d9acfa16c2697ebf2856a967a00c1f62db065053a0d71e74fbfa6fb29","abstract_canon_sha256":"fbe2866e8cac00dc6984ad359d91e36311a406036c9db6f9cfa4868bcaff97e4"},"schema_version":"1.0"},"canonical_sha256":"f23b8d60ec6fc5fa2357a919050d56dded44f2c1be0b161a071e1a21a242cf43","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:50:44.323688Z","signature_b64":"9WajhYTJbbFb74WySBSHHOhp2R9vLP1zGswfLSTuUkUv2XPxoFeSDPhphetPPJjJpf4NMR0sVPOga3sW9qO/CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f23b8d60ec6fc5fa2357a919050d56dded44f2c1be0b161a071e1a21a242cf43","last_reissued_at":"2026-07-05T08:50:44.323249Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:50:44.323249Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2408.00026","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":"2026-07-05T08:50:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gqNrNEaJJNDflBDJkauG6UwsbW+52Q5GRtd6V8cLkHP6hMVm6OhoHajcfmnllMv+MOAqN1x8Nd9Xky8UvhkmDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:55:39.485801Z"},"content_sha256":"7e43fb241d4db25f918ef59a9338924a701cbe51630bc9279cf26e3c57bd31a4","schema_version":"1.0","event_id":"sha256:7e43fb241d4db25f918ef59a9338924a701cbe51630bc9279cf26e3c57bd31a4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:6I5Y2YHMN7C7UI2XVEMQKDKW3X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Study of Wide-Field-of-View X-ray Observations of the Virgo Cluster Using the Lobster Eye Imager for Astronomy","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.HE","authors_text":"Cheng-Kui Li, Chen Zhang, Hai-Hui Zhao, Hai-Wu Pan, Heng Yu, Shan-Shan Weng, Shu-Mei Jia, Wen-Cheng Feng, Yong Chen, Yuan Liu, Yu-Lin Cheng, Zhi-Xing Ling","submitted_at":"2024-07-31T08:16:30Z","abstract_excerpt":"The Lobster Eye Imager for Astronomy (LEIA) is the pathfinder of the wide-field X-ray telescope used in the Einstein Probe mission. In this study, we present an image of the Virgo Cluster taken by LEIA in the 0.5-4.5 keV band with an exposure time of $\\sim$17.3 ks in the central region. This extended emission is generally consistent with the results obtained by ROSAT. However, the field is affected by bright point sources due to the instrument's Point Spread Function (PSF) effect. Through fitting of the LEIA spectrum of the Virgo Cluster, we obtained a temperature of $2.1^{+0.3}_{-0.1}$ keV, w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.00026","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/2408.00026/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":"2026-07-05T08:50:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LhtdzIeOWFVMPV9/rRHSVuZRDirea06wHWhYSMOp0cC1gqXUWedqMit2wO3mSgO1LKjOTfo0UyEo58Ia24TMBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:55:39.486381Z"},"content_sha256":"66475ddf12d15c0c19396cf72cc285c504ce215a5f051f73b73d16e236f0e017","schema_version":"1.0","event_id":"sha256:66475ddf12d15c0c19396cf72cc285c504ce215a5f051f73b73d16e236f0e017"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6I5Y2YHMN7C7UI2XVEMQKDKW3X/bundle.json","state_url":"https://pith.science/pith/6I5Y2YHMN7C7UI2XVEMQKDKW3X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6I5Y2YHMN7C7UI2XVEMQKDKW3X/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":"2026-08-04T17:55:39Z","links":{"resolver":"https://pith.science/pith/6I5Y2YHMN7C7UI2XVEMQKDKW3X","bundle":"https://pith.science/pith/6I5Y2YHMN7C7UI2XVEMQKDKW3X/bundle.json","state":"https://pith.science/pith/6I5Y2YHMN7C7UI2XVEMQKDKW3X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6I5Y2YHMN7C7UI2XVEMQKDKW3X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:6I5Y2YHMN7C7UI2XVEMQKDKW3X","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":"fbe2866e8cac00dc6984ad359d91e36311a406036c9db6f9cfa4868bcaff97e4","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-07-31T08:16:30Z","title_canon_sha256":"a838037d9acfa16c2697ebf2856a967a00c1f62db065053a0d71e74fbfa6fb29"},"schema_version":"1.0","source":{"id":"2408.00026","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.00026","created_at":"2026-07-05T08:50:44Z"},{"alias_kind":"arxiv_version","alias_value":"2408.00026v1","created_at":"2026-07-05T08:50:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.00026","created_at":"2026-07-05T08:50:44Z"},{"alias_kind":"pith_short_12","alias_value":"6I5Y2YHMN7C7","created_at":"2026-07-05T08:50:44Z"},{"alias_kind":"pith_short_16","alias_value":"6I5Y2YHMN7C7UI2X","created_at":"2026-07-05T08:50:44Z"},{"alias_kind":"pith_short_8","alias_value":"6I5Y2YHM","created_at":"2026-07-05T08:50:44Z"}],"graph_snapshots":[{"event_id":"sha256:66475ddf12d15c0c19396cf72cc285c504ce215a5f051f73b73d16e236f0e017","target":"graph","created_at":"2026-07-05T08:50:44Z","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/2408.00026/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Lobster Eye Imager for Astronomy (LEIA) is the pathfinder of the wide-field X-ray telescope used in the Einstein Probe mission. In this study, we present an image of the Virgo Cluster taken by LEIA in the 0.5-4.5 keV band with an exposure time of $\\sim$17.3 ks in the central region. This extended emission is generally consistent with the results obtained by ROSAT. However, the field is affected by bright point sources due to the instrument's Point Spread Function (PSF) effect. Through fitting of the LEIA spectrum of the Virgo Cluster, we obtained a temperature of $2.1^{+0.3}_{-0.1}$ keV, w","authors_text":"Cheng-Kui Li, Chen Zhang, Hai-Hui Zhao, Hai-Wu Pan, Heng Yu, Shan-Shan Weng, Shu-Mei Jia, Wen-Cheng Feng, Yong Chen, Yuan Liu, Yu-Lin Cheng, Zhi-Xing Ling","cross_cats":["astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-07-31T08:16:30Z","title":"Study of Wide-Field-of-View X-ray Observations of the Virgo Cluster Using the Lobster Eye Imager for Astronomy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.00026","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":"sha256:7e43fb241d4db25f918ef59a9338924a701cbe51630bc9279cf26e3c57bd31a4","target":"record","created_at":"2026-07-05T08:50:44Z","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":"fbe2866e8cac00dc6984ad359d91e36311a406036c9db6f9cfa4868bcaff97e4","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-07-31T08:16:30Z","title_canon_sha256":"a838037d9acfa16c2697ebf2856a967a00c1f62db065053a0d71e74fbfa6fb29"},"schema_version":"1.0","source":{"id":"2408.00026","kind":"arxiv","version":1}},"canonical_sha256":"f23b8d60ec6fc5fa2357a919050d56dded44f2c1be0b161a071e1a21a242cf43","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f23b8d60ec6fc5fa2357a919050d56dded44f2c1be0b161a071e1a21a242cf43","first_computed_at":"2026-07-05T08:50:44.323249Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:50:44.323249Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9WajhYTJbbFb74WySBSHHOhp2R9vLP1zGswfLSTuUkUv2XPxoFeSDPhphetPPJjJpf4NMR0sVPOga3sW9qO/CQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:50:44.323688Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.00026","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7e43fb241d4db25f918ef59a9338924a701cbe51630bc9279cf26e3c57bd31a4","sha256:66475ddf12d15c0c19396cf72cc285c504ce215a5f051f73b73d16e236f0e017"],"state_sha256":"d971b940d204769fc72590b9d3b2585a1c36966e95d2679e1d7d9ff1cc04ee10"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tlzpE8H/g5drfejWv40vE8vVgM7myvyr/8pnDxPQztg4QTl4BrLkG30uf18lcBGSGB6EpGAA0BFteEfBgwRkBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T17:55:39.491164Z","bundle_sha256":"2834380c080a72a3aa6f5c9d6c4568bb28aac63b2128523670f70dafcdcd6616"}}