{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:4P2YH4QSKFQ6PXJSRXJGREBJLJ","short_pith_number":"pith:4P2YH4QS","canonical_record":{"source":{"id":"2102.08700","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-02-17T11:17:30Z","cross_cats_sorted":[],"title_canon_sha256":"d1b832b725d5aa4d9ee1521f2b847b029436c83d00d4038f75ed54d211df2817","abstract_canon_sha256":"9658c09670ffbcc6d27cc6d6d2c751812e1489343b10f3104eaa029868253188"},"schema_version":"1.0"},"canonical_sha256":"e3f583f2125161e7dd328dd26890295a60575f2688e55c6577561c7e84b3b1e3","source":{"kind":"arxiv","id":"2102.08700","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.08700","created_at":"2026-07-05T02:16:06Z"},{"alias_kind":"arxiv_version","alias_value":"2102.08700v1","created_at":"2026-07-05T02:16:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.08700","created_at":"2026-07-05T02:16:06Z"},{"alias_kind":"pith_short_12","alias_value":"4P2YH4QSKFQ6","created_at":"2026-07-05T02:16:06Z"},{"alias_kind":"pith_short_16","alias_value":"4P2YH4QSKFQ6PXJS","created_at":"2026-07-05T02:16:06Z"},{"alias_kind":"pith_short_8","alias_value":"4P2YH4QS","created_at":"2026-07-05T02:16:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:4P2YH4QSKFQ6PXJSRXJGREBJLJ","target":"record","payload":{"canonical_record":{"source":{"id":"2102.08700","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-02-17T11:17:30Z","cross_cats_sorted":[],"title_canon_sha256":"d1b832b725d5aa4d9ee1521f2b847b029436c83d00d4038f75ed54d211df2817","abstract_canon_sha256":"9658c09670ffbcc6d27cc6d6d2c751812e1489343b10f3104eaa029868253188"},"schema_version":"1.0"},"canonical_sha256":"e3f583f2125161e7dd328dd26890295a60575f2688e55c6577561c7e84b3b1e3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:16:06.738957Z","signature_b64":"/jEVWustgIA3yo8LKLIsfO852rGx/tmbGzV7MTQ4I9dDEfTuwmydMQwRjer5OQvwYR2dY/QQlpv6b5+UgbMSDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e3f583f2125161e7dd328dd26890295a60575f2688e55c6577561c7e84b3b1e3","last_reissued_at":"2026-07-05T02:16:06.738482Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:16:06.738482Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.08700","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":"2026-07-05T02:16:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7kKU4e28aADqDQTNI7Hqqmjr3PlCza9v7yLT4nV68KRn0S0hCaVqcfXwUjdtSfpmnZS7p/pTFkE4Z/PLvGJQCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T12:56:50.023330Z"},"content_sha256":"f020cec1d833a0f863d79a645f4b56063d6312538fe34aaa704f3001254c505f","schema_version":"1.0","event_id":"sha256:f020cec1d833a0f863d79a645f4b56063d6312538fe34aaa704f3001254c505f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:4P2YH4QSKFQ6PXJSRXJGREBJLJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The soft X-ray imager on THESEUS: the transient high energy survey and early universe surveyor","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Alexander Lodge, Andy Beardmore, Charlotte H. Feldman, Hannah Natasha Lerman, Ian Hutchinson, Melissa McHugh, Paul Drumm, Paul O'Brien, Richard Willingale, Roisin Speight","submitted_at":"2021-02-17T11:17:30Z","abstract_excerpt":"We are entering a new era for high energy astrophysics with the use of new technology to increase our ability to both survey and monitor the sky. The Soft X-ray Imager (SXI) instrument on the THESEUS mission will revolutionize transient astronomy by using wide-field focusing optics to increase the sensitivity to fast transients by several orders of magnitude. The THESEUS mission is under Phase A study by ESA for its M5 opportunity. THESEUS will carry two large area monitors utilizing Lobster-eye (the SXI instrument) and coded-mask (the XGIS instrument) technologies, and an optical-IR telescope"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.08700","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/2102.08700/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":"2026-07-05T02:16:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RRCV2udD/jcVOoGZV2VTkGKBAFX37RBc9HTtozSGp3yWAssfKLZVBXTyfzWqgbKVc2TpVSKmx70pMxJOLLX1Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T12:56:50.024018Z"},"content_sha256":"5017b7b40fec1131bb0687a8dbf391dbcab6d321f7d3b1f0a991b42e02c84b7e","schema_version":"1.0","event_id":"sha256:5017b7b40fec1131bb0687a8dbf391dbcab6d321f7d3b1f0a991b42e02c84b7e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4P2YH4QSKFQ6PXJSRXJGREBJLJ/bundle.json","state_url":"https://pith.science/pith/4P2YH4QSKFQ6PXJSRXJGREBJLJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4P2YH4QSKFQ6PXJSRXJGREBJLJ/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":"2026-08-18T12:56:50Z","links":{"resolver":"https://pith.science/pith/4P2YH4QSKFQ6PXJSRXJGREBJLJ","bundle":"https://pith.science/pith/4P2YH4QSKFQ6PXJSRXJGREBJLJ/bundle.json","state":"https://pith.science/pith/4P2YH4QSKFQ6PXJSRXJGREBJLJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4P2YH4QSKFQ6PXJSRXJGREBJLJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:4P2YH4QSKFQ6PXJSRXJGREBJLJ","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":"9658c09670ffbcc6d27cc6d6d2c751812e1489343b10f3104eaa029868253188","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-02-17T11:17:30Z","title_canon_sha256":"d1b832b725d5aa4d9ee1521f2b847b029436c83d00d4038f75ed54d211df2817"},"schema_version":"1.0","source":{"id":"2102.08700","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.08700","created_at":"2026-07-05T02:16:06Z"},{"alias_kind":"arxiv_version","alias_value":"2102.08700v1","created_at":"2026-07-05T02:16:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.08700","created_at":"2026-07-05T02:16:06Z"},{"alias_kind":"pith_short_12","alias_value":"4P2YH4QSKFQ6","created_at":"2026-07-05T02:16:06Z"},{"alias_kind":"pith_short_16","alias_value":"4P2YH4QSKFQ6PXJS","created_at":"2026-07-05T02:16:06Z"},{"alias_kind":"pith_short_8","alias_value":"4P2YH4QS","created_at":"2026-07-05T02:16:06Z"}],"graph_snapshots":[{"event_id":"sha256:5017b7b40fec1131bb0687a8dbf391dbcab6d321f7d3b1f0a991b42e02c84b7e","target":"graph","created_at":"2026-07-05T02:16:06Z","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/2102.08700/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We are entering a new era for high energy astrophysics with the use of new technology to increase our ability to both survey and monitor the sky. The Soft X-ray Imager (SXI) instrument on the THESEUS mission will revolutionize transient astronomy by using wide-field focusing optics to increase the sensitivity to fast transients by several orders of magnitude. The THESEUS mission is under Phase A study by ESA for its M5 opportunity. THESEUS will carry two large area monitors utilizing Lobster-eye (the SXI instrument) and coded-mask (the XGIS instrument) technologies, and an optical-IR telescope","authors_text":"Alexander Lodge, Andy Beardmore, Charlotte H. Feldman, Hannah Natasha Lerman, Ian Hutchinson, Melissa McHugh, Paul Drumm, Paul O'Brien, Richard Willingale, Roisin Speight","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-02-17T11:17:30Z","title":"The soft X-ray imager on THESEUS: the transient high energy survey and early universe surveyor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.08700","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:f020cec1d833a0f863d79a645f4b56063d6312538fe34aaa704f3001254c505f","target":"record","created_at":"2026-07-05T02:16:06Z","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":"9658c09670ffbcc6d27cc6d6d2c751812e1489343b10f3104eaa029868253188","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-02-17T11:17:30Z","title_canon_sha256":"d1b832b725d5aa4d9ee1521f2b847b029436c83d00d4038f75ed54d211df2817"},"schema_version":"1.0","source":{"id":"2102.08700","kind":"arxiv","version":1}},"canonical_sha256":"e3f583f2125161e7dd328dd26890295a60575f2688e55c6577561c7e84b3b1e3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e3f583f2125161e7dd328dd26890295a60575f2688e55c6577561c7e84b3b1e3","first_computed_at":"2026-07-05T02:16:06.738482Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:16:06.738482Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/jEVWustgIA3yo8LKLIsfO852rGx/tmbGzV7MTQ4I9dDEfTuwmydMQwRjer5OQvwYR2dY/QQlpv6b5+UgbMSDg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:16:06.738957Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.08700","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f020cec1d833a0f863d79a645f4b56063d6312538fe34aaa704f3001254c505f","sha256:5017b7b40fec1131bb0687a8dbf391dbcab6d321f7d3b1f0a991b42e02c84b7e"],"state_sha256":"cbadf23e1a6a82a49a8036b3fb4c4003dc7385f00d5ca7b1b4c405536b4be548"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nd1t6atyNS10a76jskSvRtkOq6FpP1E1U/K70BUOg+XPIcLhZrtCYNrPfIcMnX5yPPGNex3u7PRScC7InOrTAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T12:56:50.027917Z","bundle_sha256":"67752522e466414f59f1abb75714291bd601dc653d19cd4a9b5e1c9faff4159c"}}