{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:IQI6SPMKCGXBEAMCSYNS6VKF3Q","short_pith_number":"pith:IQI6SPMK","canonical_record":{"source":{"id":"2504.21313","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-04-30T04:55:48Z","cross_cats_sorted":[],"title_canon_sha256":"0643ee4131aede21f2ba34b535d7f1d08615d9d7342edeb332b6cb9f414523d5","abstract_canon_sha256":"0ac74f62f0cf15ebb082035d781a5fc7307f94192749ee25e00126d58722c942"},"schema_version":"1.0"},"canonical_sha256":"4411e93d8a11ae120182961b2f5545dc39d86fd936bd027d82df66992f528919","source":{"kind":"arxiv","id":"2504.21313","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.21313","created_at":"2026-07-05T10:56:22Z"},{"alias_kind":"arxiv_version","alias_value":"2504.21313v1","created_at":"2026-07-05T10:56:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.21313","created_at":"2026-07-05T10:56:22Z"},{"alias_kind":"pith_short_12","alias_value":"IQI6SPMKCGXB","created_at":"2026-07-05T10:56:22Z"},{"alias_kind":"pith_short_16","alias_value":"IQI6SPMKCGXBEAMC","created_at":"2026-07-05T10:56:22Z"},{"alias_kind":"pith_short_8","alias_value":"IQI6SPMK","created_at":"2026-07-05T10:56:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:IQI6SPMKCGXBEAMCSYNS6VKF3Q","target":"record","payload":{"canonical_record":{"source":{"id":"2504.21313","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-04-30T04:55:48Z","cross_cats_sorted":[],"title_canon_sha256":"0643ee4131aede21f2ba34b535d7f1d08615d9d7342edeb332b6cb9f414523d5","abstract_canon_sha256":"0ac74f62f0cf15ebb082035d781a5fc7307f94192749ee25e00126d58722c942"},"schema_version":"1.0"},"canonical_sha256":"4411e93d8a11ae120182961b2f5545dc39d86fd936bd027d82df66992f528919","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:56:22.000653Z","signature_b64":"TvuR20+UhcHR/Bvlc7h+VLTnLPW/iAEIKa4rzM1TUIs9C7jVs7Rs/CBImG9QNbzOdwojRcadV3YXgB3QeoyTDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4411e93d8a11ae120182961b2f5545dc39d86fd936bd027d82df66992f528919","last_reissued_at":"2026-07-05T10:56:22.000171Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:56:22.000171Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.21313","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":"2026-07-05T10:56:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uRAIOCB14CjFIk5HpFKzo5E0hESlewX/srDPsNisu6CQjeWC8whiLlmYDy4fgkBvbKHj1Geg+CQYeYkWI+9JCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T10:01:19.872522Z"},"content_sha256":"88c0007bf9080850ddbdc8a66c83e5d3a48372280354201a377a6ec2a7ba956d","schema_version":"1.0","event_id":"sha256:88c0007bf9080850ddbdc8a66c83e5d3a48372280354201a377a6ec2a7ba956d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:IQI6SPMKCGXBEAMCSYNS6VKF3Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evolution of the inner accretion flow and the white-dwarf spin pulse during the 2023 outburst in GK Persei","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Christian Knigge, Keith C. Gendreau, Mariko Kimura, Martina Veresvarska, Noel Castro-Segura, Shigeyuki Sako, Simone Scaringi, Takayuki Hayashi, Wataru Iwakiri, Yuuki Wada, Zaven Arzoumanian","submitted_at":"2025-04-30T04:55:48Z","abstract_excerpt":"We present our X-ray and optical observations performed by NICER, NuSTAR, and Tomo-e Gozen during the 2023 outburst in the intermediate polar GK Persei. The X-ray spectrum consisted of three components: blackbody emission of several tens of eVs from the irradiated white-dwarf surface, a source possibly including several emission lines around 1 keV, and multi-temperature bremsstrahlung emission from the accretion column. The 351.3-s white-dwarf spin pulse was detected in X-rays, and the observable X-ray flux from the column drastically decreased at the off-pulse phase, which suggests that the a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.21313","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/2504.21313/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":"2026-07-05T10:56:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HSpfI729tawSqpxdjlJhyp/fEIfeFKKdE0sDqZOvXe2Xe4ukHld2Er/cLt5307Bc/ib9mUzyKyALsCC76KafCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T10:01:19.873124Z"},"content_sha256":"b6d677796be2b5587d622ebd6366e50d28f8d74d5b8ddc7835446bc7e60c8173","schema_version":"1.0","event_id":"sha256:b6d677796be2b5587d622ebd6366e50d28f8d74d5b8ddc7835446bc7e60c8173"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IQI6SPMKCGXBEAMCSYNS6VKF3Q/bundle.json","state_url":"https://pith.science/pith/IQI6SPMKCGXBEAMCSYNS6VKF3Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IQI6SPMKCGXBEAMCSYNS6VKF3Q/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":"2026-08-12T10:01:19Z","links":{"resolver":"https://pith.science/pith/IQI6SPMKCGXBEAMCSYNS6VKF3Q","bundle":"https://pith.science/pith/IQI6SPMKCGXBEAMCSYNS6VKF3Q/bundle.json","state":"https://pith.science/pith/IQI6SPMKCGXBEAMCSYNS6VKF3Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IQI6SPMKCGXBEAMCSYNS6VKF3Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:IQI6SPMKCGXBEAMCSYNS6VKF3Q","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":"0ac74f62f0cf15ebb082035d781a5fc7307f94192749ee25e00126d58722c942","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-04-30T04:55:48Z","title_canon_sha256":"0643ee4131aede21f2ba34b535d7f1d08615d9d7342edeb332b6cb9f414523d5"},"schema_version":"1.0","source":{"id":"2504.21313","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.21313","created_at":"2026-07-05T10:56:22Z"},{"alias_kind":"arxiv_version","alias_value":"2504.21313v1","created_at":"2026-07-05T10:56:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.21313","created_at":"2026-07-05T10:56:22Z"},{"alias_kind":"pith_short_12","alias_value":"IQI6SPMKCGXB","created_at":"2026-07-05T10:56:22Z"},{"alias_kind":"pith_short_16","alias_value":"IQI6SPMKCGXBEAMC","created_at":"2026-07-05T10:56:22Z"},{"alias_kind":"pith_short_8","alias_value":"IQI6SPMK","created_at":"2026-07-05T10:56:22Z"}],"graph_snapshots":[{"event_id":"sha256:b6d677796be2b5587d622ebd6366e50d28f8d74d5b8ddc7835446bc7e60c8173","target":"graph","created_at":"2026-07-05T10:56:22Z","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/2504.21313/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present our X-ray and optical observations performed by NICER, NuSTAR, and Tomo-e Gozen during the 2023 outburst in the intermediate polar GK Persei. The X-ray spectrum consisted of three components: blackbody emission of several tens of eVs from the irradiated white-dwarf surface, a source possibly including several emission lines around 1 keV, and multi-temperature bremsstrahlung emission from the accretion column. The 351.3-s white-dwarf spin pulse was detected in X-rays, and the observable X-ray flux from the column drastically decreased at the off-pulse phase, which suggests that the a","authors_text":"Christian Knigge, Keith C. Gendreau, Mariko Kimura, Martina Veresvarska, Noel Castro-Segura, Shigeyuki Sako, Simone Scaringi, Takayuki Hayashi, Wataru Iwakiri, Yuuki Wada, Zaven Arzoumanian","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-04-30T04:55:48Z","title":"Evolution of the inner accretion flow and the white-dwarf spin pulse during the 2023 outburst in GK Persei"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.21313","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":"sha256:88c0007bf9080850ddbdc8a66c83e5d3a48372280354201a377a6ec2a7ba956d","target":"record","created_at":"2026-07-05T10:56:22Z","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":"0ac74f62f0cf15ebb082035d781a5fc7307f94192749ee25e00126d58722c942","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-04-30T04:55:48Z","title_canon_sha256":"0643ee4131aede21f2ba34b535d7f1d08615d9d7342edeb332b6cb9f414523d5"},"schema_version":"1.0","source":{"id":"2504.21313","kind":"arxiv","version":1}},"canonical_sha256":"4411e93d8a11ae120182961b2f5545dc39d86fd936bd027d82df66992f528919","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4411e93d8a11ae120182961b2f5545dc39d86fd936bd027d82df66992f528919","first_computed_at":"2026-07-05T10:56:22.000171Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:56:22.000171Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TvuR20+UhcHR/Bvlc7h+VLTnLPW/iAEIKa4rzM1TUIs9C7jVs7Rs/CBImG9QNbzOdwojRcadV3YXgB3QeoyTDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:56:22.000653Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.21313","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:88c0007bf9080850ddbdc8a66c83e5d3a48372280354201a377a6ec2a7ba956d","sha256:b6d677796be2b5587d622ebd6366e50d28f8d74d5b8ddc7835446bc7e60c8173"],"state_sha256":"5e61b2a99cac421d8767a50c082d74d6000eaa65775ff1f7894dc7634378a23d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EfcKEgJi9yD+oZPOIa6eTzL25Z8p9SQcfHnPx1MiPTnaNAA9RH4FILVW11XCaORf2+8sak+sBSqHljwbjGIfDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T10:01:19.876744Z","bundle_sha256":"77d12badcfaef52aebb67a415297b6c25f3b1c7bc6b9f2159fe0ae7798f8ecda"}}