{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:GFH6ISTOWYHSND5UZCAHUACU6E","short_pith_number":"pith:GFH6ISTO","canonical_record":{"source":{"id":"1603.06540","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-03-21T19:09:29Z","cross_cats_sorted":[],"title_canon_sha256":"96672ff7d6cb6c2b3b12fd8b509f17aa5758a5009bd4cd3c59ee2a24356c2642","abstract_canon_sha256":"b44510862b0c6c4015322859d716f15b5432832b0f93227a5fb93781df9e7e47"},"schema_version":"1.0"},"canonical_sha256":"314fe44a6eb60f268fb4c8807a0054f10f372c38492251b96ce89798b52c7e7c","source":{"kind":"arxiv","id":"1603.06540","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.06540","created_at":"2026-05-18T01:18:48Z"},{"alias_kind":"arxiv_version","alias_value":"1603.06540v1","created_at":"2026-05-18T01:18:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.06540","created_at":"2026-05-18T01:18:48Z"},{"alias_kind":"pith_short_12","alias_value":"GFH6ISTOWYHS","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GFH6ISTOWYHSND5U","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GFH6ISTO","created_at":"2026-05-18T12:30:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:GFH6ISTOWYHSND5UZCAHUACU6E","target":"record","payload":{"canonical_record":{"source":{"id":"1603.06540","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-03-21T19:09:29Z","cross_cats_sorted":[],"title_canon_sha256":"96672ff7d6cb6c2b3b12fd8b509f17aa5758a5009bd4cd3c59ee2a24356c2642","abstract_canon_sha256":"b44510862b0c6c4015322859d716f15b5432832b0f93227a5fb93781df9e7e47"},"schema_version":"1.0"},"canonical_sha256":"314fe44a6eb60f268fb4c8807a0054f10f372c38492251b96ce89798b52c7e7c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:18:48.324212Z","signature_b64":"LPkvV5aHkrAIW95LEYozSlZxj+FHUYhiqXzRwuLlqNwt2C4Ap43R/MRn6zcUz4xgQc8bOrxVkXQTz/RmTZkFCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"314fe44a6eb60f268fb4c8807a0054f10f372c38492251b96ce89798b52c7e7c","last_reissued_at":"2026-05-18T01:18:48.323704Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:18:48.323704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.06540","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":"2026-05-18T01:18:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZRkBqMpyK447UJCkdWElalchwEP1w/fHfRPlOv0rF3eS5S8eWCYWbOFa2I/Ux8898m89fwvxi5m5pp+wW25TCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T17:53:12.901857Z"},"content_sha256":"37f16fd1d511550f454f8714cf83f553d03f264582df0845953b021f52a02248","schema_version":"1.0","event_id":"sha256:37f16fd1d511550f454f8714cf83f553d03f264582df0845953b021f52a02248"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:GFH6ISTOWYHSND5UZCAHUACU6E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improvement of Spectroscopic Performance using a Charge-sensitive Amplifier Circuit for an X-Ray Astronomical SOI Pixel Detector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Ayaki Takeda, Hideaki Matsumura, Hiroki Kamehama, Hiroyuki Uchida, Keiichiro Kagawa, Keita Yasutomi, Koji Mori, Ryota Takenaka, Shinya Nakashima, Shoji Kawahito, Sumeet Shrestha, Takaaki Tanaka, Takayoshi Kohmura, Takeshi Go Tsuru, Yasuo Arai, Yusuke Nishioka","submitted_at":"2016-03-21T19:09:29Z","abstract_excerpt":"We have been developing monolithic active pixel sensors series, named \"XRPIX,\" based on the silicon-on-insulator (SOI) pixel technology, for future X-ray astronomical satellites. The XRPIX series offers high coincidence time resolution ({\\rm \\sim}1 {\\rm \\mu}s), superior readout time ({\\rm \\sim}10 {\\rm \\mu}s), and a wide energy range (0.5--40 keV). In the previous study, we successfully demonstrated X-ray detection by event-driven readout of XRPIX2b. We here report recent improvements in spectroscopic performance. We successfully increased the gain and reduced the readout noise in XRPIX2b by de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.06540","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":""},"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":"2026-05-18T01:18:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sUgx2MfAkaNfNqDm1wT+Dt2OGMjvCUAnykAiQ2hNYSHO3kjrGeOTEbXTlEw7kXbmi0C4rb8goeAdWlJ2VqyfCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T17:53:12.902199Z"},"content_sha256":"6fda2c06ce4a819f2116c6f7cbe2825479e102c63dea53ce20d197cac32254db","schema_version":"1.0","event_id":"sha256:6fda2c06ce4a819f2116c6f7cbe2825479e102c63dea53ce20d197cac32254db"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GFH6ISTOWYHSND5UZCAHUACU6E/bundle.json","state_url":"https://pith.science/pith/GFH6ISTOWYHSND5UZCAHUACU6E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GFH6ISTOWYHSND5UZCAHUACU6E/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":"2026-06-09T17:53:12Z","links":{"resolver":"https://pith.science/pith/GFH6ISTOWYHSND5UZCAHUACU6E","bundle":"https://pith.science/pith/GFH6ISTOWYHSND5UZCAHUACU6E/bundle.json","state":"https://pith.science/pith/GFH6ISTOWYHSND5UZCAHUACU6E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GFH6ISTOWYHSND5UZCAHUACU6E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:GFH6ISTOWYHSND5UZCAHUACU6E","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":"b44510862b0c6c4015322859d716f15b5432832b0f93227a5fb93781df9e7e47","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-03-21T19:09:29Z","title_canon_sha256":"96672ff7d6cb6c2b3b12fd8b509f17aa5758a5009bd4cd3c59ee2a24356c2642"},"schema_version":"1.0","source":{"id":"1603.06540","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.06540","created_at":"2026-05-18T01:18:48Z"},{"alias_kind":"arxiv_version","alias_value":"1603.06540v1","created_at":"2026-05-18T01:18:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.06540","created_at":"2026-05-18T01:18:48Z"},{"alias_kind":"pith_short_12","alias_value":"GFH6ISTOWYHS","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GFH6ISTOWYHSND5U","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GFH6ISTO","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:6fda2c06ce4a819f2116c6f7cbe2825479e102c63dea53ce20d197cac32254db","target":"graph","created_at":"2026-05-18T01:18:48Z","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"},"paper":{"abstract_excerpt":"We have been developing monolithic active pixel sensors series, named \"XRPIX,\" based on the silicon-on-insulator (SOI) pixel technology, for future X-ray astronomical satellites. The XRPIX series offers high coincidence time resolution ({\\rm \\sim}1 {\\rm \\mu}s), superior readout time ({\\rm \\sim}10 {\\rm \\mu}s), and a wide energy range (0.5--40 keV). In the previous study, we successfully demonstrated X-ray detection by event-driven readout of XRPIX2b. We here report recent improvements in spectroscopic performance. We successfully increased the gain and reduced the readout noise in XRPIX2b by de","authors_text":"Ayaki Takeda, Hideaki Matsumura, Hiroki Kamehama, Hiroyuki Uchida, Keiichiro Kagawa, Keita Yasutomi, Koji Mori, Ryota Takenaka, Shinya Nakashima, Shoji Kawahito, Sumeet Shrestha, Takaaki Tanaka, Takayoshi Kohmura, Takeshi Go Tsuru, Yasuo Arai, Yusuke Nishioka","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-03-21T19:09:29Z","title":"Improvement of Spectroscopic Performance using a Charge-sensitive Amplifier Circuit for an X-Ray Astronomical SOI Pixel Detector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.06540","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":"sha256:37f16fd1d511550f454f8714cf83f553d03f264582df0845953b021f52a02248","target":"record","created_at":"2026-05-18T01:18:48Z","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":"b44510862b0c6c4015322859d716f15b5432832b0f93227a5fb93781df9e7e47","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-03-21T19:09:29Z","title_canon_sha256":"96672ff7d6cb6c2b3b12fd8b509f17aa5758a5009bd4cd3c59ee2a24356c2642"},"schema_version":"1.0","source":{"id":"1603.06540","kind":"arxiv","version":1}},"canonical_sha256":"314fe44a6eb60f268fb4c8807a0054f10f372c38492251b96ce89798b52c7e7c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"314fe44a6eb60f268fb4c8807a0054f10f372c38492251b96ce89798b52c7e7c","first_computed_at":"2026-05-18T01:18:48.323704Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:48.323704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LPkvV5aHkrAIW95LEYozSlZxj+FHUYhiqXzRwuLlqNwt2C4Ap43R/MRn6zcUz4xgQc8bOrxVkXQTz/RmTZkFCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:48.324212Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.06540","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:37f16fd1d511550f454f8714cf83f553d03f264582df0845953b021f52a02248","sha256:6fda2c06ce4a819f2116c6f7cbe2825479e102c63dea53ce20d197cac32254db"],"state_sha256":"b3a53caa188ad3d874cef5826f0f695b5c02f9fb679444e4e55ee2812ee3768c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Dax6lCmQHO2YJCj/Bc6YTOVoxmZrRTRk3RDqWYVNIF7fmwF+Y/EydpFKY3rEbos1Y8zDVJJmsoB5tlwf+sV3Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T17:53:12.904165Z","bundle_sha256":"05affa73efa4f286cfe5f4c74db0e778ce56e1bd9faa49d09991561301d02a3e"}}