{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:IM5FKIZOKFRRLNZ75XP4MGEZ4P","short_pith_number":"pith:IM5FKIZO","canonical_record":{"source":{"id":"2502.08030","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-02-12T00:15:19Z","cross_cats_sorted":[],"title_canon_sha256":"f2aa53964682d86a238714f46f614e80cb8786aa672ee5819e09faf88afebded","abstract_canon_sha256":"52fab491d39058603d3461876274e68fd3f9aa5b368fe67de033494f4d519ecd"},"schema_version":"1.0"},"canonical_sha256":"433a55232e516315b73feddfc61899e3dd880d2156e3914a35e7f098d09ab255","source":{"kind":"arxiv","id":"2502.08030","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.08030","created_at":"2026-07-05T10:13:14Z"},{"alias_kind":"arxiv_version","alias_value":"2502.08030v1","created_at":"2026-07-05T10:13:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.08030","created_at":"2026-07-05T10:13:14Z"},{"alias_kind":"pith_short_12","alias_value":"IM5FKIZOKFRR","created_at":"2026-07-05T10:13:14Z"},{"alias_kind":"pith_short_16","alias_value":"IM5FKIZOKFRRLNZ7","created_at":"2026-07-05T10:13:14Z"},{"alias_kind":"pith_short_8","alias_value":"IM5FKIZO","created_at":"2026-07-05T10:13:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:IM5FKIZOKFRRLNZ75XP4MGEZ4P","target":"record","payload":{"canonical_record":{"source":{"id":"2502.08030","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-02-12T00:15:19Z","cross_cats_sorted":[],"title_canon_sha256":"f2aa53964682d86a238714f46f614e80cb8786aa672ee5819e09faf88afebded","abstract_canon_sha256":"52fab491d39058603d3461876274e68fd3f9aa5b368fe67de033494f4d519ecd"},"schema_version":"1.0"},"canonical_sha256":"433a55232e516315b73feddfc61899e3dd880d2156e3914a35e7f098d09ab255","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:13:14.107610Z","signature_b64":"9ebREpJqbfh8C6sNu7tACTURmxBfMuI9UnntNUnVz8/j9aDECQUCTYqmxNW8NxQMb433bKn1G4Vcxndn4yFUAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"433a55232e516315b73feddfc61899e3dd880d2156e3914a35e7f098d09ab255","last_reissued_at":"2026-07-05T10:13:14.107142Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:13:14.107142Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.08030","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":"2026-07-05T10:13:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HZ5/LuZX1jdYzu+XhI2F8KWEjCSiRWeCO40YSx7VUzmk6VOS2QRZQjCwRtJC6bx8CJH2oFfDYpvBpvPelEZODw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T03:23:13.018727Z"},"content_sha256":"a9e752e963808f12b6bb57200cb7c87307da1d7c772c4e6abd7efdb815866e2a","schema_version":"1.0","event_id":"sha256:a9e752e963808f12b6bb57200cb7c87307da1d7c772c4e6abd7efdb815866e2a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:IM5FKIZOKFRRLNZ75XP4MGEZ4P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Soft X-ray Imager of the Xtend system onboard XRISM","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Amano Yuki, Daiki Aoki, Hanako Nakano, Haruhiko Yokosu, Hideki Uchiyama, Hirofumi Noda, Hirokazu Odaka, Hiromasa Suzuki, Hironori Matsumoto, Hiroshi Murakami, Hiroshi Nakajima, Hiroshi Tomida, Hiroshi Tsunemi, Hiroyuki Uchida, Isamu Hatsukade, Jin Sato, Junko Hiraga, Jun Kurashima, Kaito Hayakawa, Kaito Ninoyu, Kazuhiro Ichikawa, Kazutaka Yamaoka, Keitaro Miyazaki, Kiyoshi Hayashida, Kohei Kusunoki, Kohei Shima, Koji Mori, Kotomi Fuchi, Kouichi Hagino, Kouta Takayama, Kumiko Nobukawa, Makoto Yamauchi, Marina Yoshimoto, Masahiro Fukuda, Masanobu Ozaki, Masayoshi Nobukawa, Mayu Higuchi, Reika Urase, Reo Takemoto, Shogo Benjamin Kobayashi, Shun Inoue, Shun Tsunomachi, Tadayasu Dotani, Takaaki Tanaka, Takamitsu Kamei, Takashi Sako, Takayoshi Kohmura, Takeshi Go Tsuru, Tessei Yoshida, Tomokage Yoneyama, Tomoya Kamatani, Toshiyuki Takaki, Tsukasa Matsushima, Wakana Yonemaru, Yamato Ito, Yoh Asahina, Yoshiaki Kanemaru, Yoshinori Otsuka, Yuma Aoki, Yuta Terada","submitted_at":"2025-02-12T00:15:19Z","abstract_excerpt":"The Soft X-ray Imager (SXI) is the X-ray charge-coupled device (CCD) camera for the soft X-ray imaging telescope Xtend installed on the X-ray Imaging and Spectroscopy Mission (XRISM), which was adopted as a recovery mission for the Hitomi X-ray satellite and was successfully launched on 2023 September 7 (JST). In order to maximize the science output of XRISM, we set the requirements for Xtend and find that the CCD set employed in the Hitomi/SXI or similar, i.e., a $2 \\times 2$ array of back-illuminated CCDs with a $200~\\mu$m-thick depletion layer, would be practically best among available choi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.08030","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/2502.08030/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":"2026-07-05T10:13:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nxlpv4VSxdJLCJndl36ZuPdQzpTt3dtA3XljdhvcYcrPM2S/xeVifPkCEUNVQbjM2hCu64FJxOHFRkELLnH0Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T03:23:13.019114Z"},"content_sha256":"37d3dc13d6d998f137bb572641feca9a616a4ffeaab1582699434a3b887ca041","schema_version":"1.0","event_id":"sha256:37d3dc13d6d998f137bb572641feca9a616a4ffeaab1582699434a3b887ca041"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IM5FKIZOKFRRLNZ75XP4MGEZ4P/bundle.json","state_url":"https://pith.science/pith/IM5FKIZOKFRRLNZ75XP4MGEZ4P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IM5FKIZOKFRRLNZ75XP4MGEZ4P/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":"2026-07-07T03:23:13Z","links":{"resolver":"https://pith.science/pith/IM5FKIZOKFRRLNZ75XP4MGEZ4P","bundle":"https://pith.science/pith/IM5FKIZOKFRRLNZ75XP4MGEZ4P/bundle.json","state":"https://pith.science/pith/IM5FKIZOKFRRLNZ75XP4MGEZ4P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IM5FKIZOKFRRLNZ75XP4MGEZ4P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:IM5FKIZOKFRRLNZ75XP4MGEZ4P","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":"52fab491d39058603d3461876274e68fd3f9aa5b368fe67de033494f4d519ecd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-02-12T00:15:19Z","title_canon_sha256":"f2aa53964682d86a238714f46f614e80cb8786aa672ee5819e09faf88afebded"},"schema_version":"1.0","source":{"id":"2502.08030","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.08030","created_at":"2026-07-05T10:13:14Z"},{"alias_kind":"arxiv_version","alias_value":"2502.08030v1","created_at":"2026-07-05T10:13:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.08030","created_at":"2026-07-05T10:13:14Z"},{"alias_kind":"pith_short_12","alias_value":"IM5FKIZOKFRR","created_at":"2026-07-05T10:13:14Z"},{"alias_kind":"pith_short_16","alias_value":"IM5FKIZOKFRRLNZ7","created_at":"2026-07-05T10:13:14Z"},{"alias_kind":"pith_short_8","alias_value":"IM5FKIZO","created_at":"2026-07-05T10:13:14Z"}],"graph_snapshots":[{"event_id":"sha256:37d3dc13d6d998f137bb572641feca9a616a4ffeaab1582699434a3b887ca041","target":"graph","created_at":"2026-07-05T10:13:14Z","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/2502.08030/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Soft X-ray Imager (SXI) is the X-ray charge-coupled device (CCD) camera for the soft X-ray imaging telescope Xtend installed on the X-ray Imaging and Spectroscopy Mission (XRISM), which was adopted as a recovery mission for the Hitomi X-ray satellite and was successfully launched on 2023 September 7 (JST). In order to maximize the science output of XRISM, we set the requirements for Xtend and find that the CCD set employed in the Hitomi/SXI or similar, i.e., a $2 \\times 2$ array of back-illuminated CCDs with a $200~\\mu$m-thick depletion layer, would be practically best among available choi","authors_text":"Amano Yuki, Daiki Aoki, Hanako Nakano, Haruhiko Yokosu, Hideki Uchiyama, Hirofumi Noda, Hirokazu Odaka, Hiromasa Suzuki, Hironori Matsumoto, Hiroshi Murakami, Hiroshi Nakajima, Hiroshi Tomida, Hiroshi Tsunemi, Hiroyuki Uchida, Isamu Hatsukade, Jin Sato, Junko Hiraga, Jun Kurashima, Kaito Hayakawa, Kaito Ninoyu, Kazuhiro Ichikawa, Kazutaka Yamaoka, Keitaro Miyazaki, Kiyoshi Hayashida, Kohei Kusunoki, Kohei Shima, Koji Mori, Kotomi Fuchi, Kouichi Hagino, Kouta Takayama, Kumiko Nobukawa, Makoto Yamauchi, Marina Yoshimoto, Masahiro Fukuda, Masanobu Ozaki, Masayoshi Nobukawa, Mayu Higuchi, Reika Urase, Reo Takemoto, Shogo Benjamin Kobayashi, Shun Inoue, Shun Tsunomachi, Tadayasu Dotani, Takaaki Tanaka, Takamitsu Kamei, Takashi Sako, Takayoshi Kohmura, Takeshi Go Tsuru, Tessei Yoshida, Tomokage Yoneyama, Tomoya Kamatani, Toshiyuki Takaki, Tsukasa Matsushima, Wakana Yonemaru, Yamato Ito, Yoh Asahina, Yoshiaki Kanemaru, Yoshinori Otsuka, Yuma Aoki, Yuta Terada","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-02-12T00:15:19Z","title":"Soft X-ray Imager of the Xtend system onboard XRISM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.08030","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:a9e752e963808f12b6bb57200cb7c87307da1d7c772c4e6abd7efdb815866e2a","target":"record","created_at":"2026-07-05T10:13:14Z","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":"52fab491d39058603d3461876274e68fd3f9aa5b368fe67de033494f4d519ecd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-02-12T00:15:19Z","title_canon_sha256":"f2aa53964682d86a238714f46f614e80cb8786aa672ee5819e09faf88afebded"},"schema_version":"1.0","source":{"id":"2502.08030","kind":"arxiv","version":1}},"canonical_sha256":"433a55232e516315b73feddfc61899e3dd880d2156e3914a35e7f098d09ab255","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"433a55232e516315b73feddfc61899e3dd880d2156e3914a35e7f098d09ab255","first_computed_at":"2026-07-05T10:13:14.107142Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:13:14.107142Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9ebREpJqbfh8C6sNu7tACTURmxBfMuI9UnntNUnVz8/j9aDECQUCTYqmxNW8NxQMb433bKn1G4Vcxndn4yFUAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:13:14.107610Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.08030","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9e752e963808f12b6bb57200cb7c87307da1d7c772c4e6abd7efdb815866e2a","sha256:37d3dc13d6d998f137bb572641feca9a616a4ffeaab1582699434a3b887ca041"],"state_sha256":"fed24f0058ba4d995f090a19841a322db01d374087b7614a59324ce8770dee22"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ceDqeScKF6FZ8aHBAVKsDI5bgqLrkPfg+wuIeeZwhZmgOvNinjUdpa2Fyn6y43Nu/02cXjrOllw2/LjfOotAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T03:23:13.021229Z","bundle_sha256":"b12880f834a2766bcc7f388b76fa02101c65982c9da8a3b9ca3e0738133f1977"}}