{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:DYDOZGJCVBLMHYECZSKSPTLBHR","short_pith_number":"pith:DYDOZGJC","canonical_record":{"source":{"id":"2505.21368","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-05-27T15:57:28Z","cross_cats_sorted":[],"title_canon_sha256":"364913904e197e7b013fefa2e8e760f89f6f98206e052d15bb9dfc0f4bb10a7e","abstract_canon_sha256":"befe5088c85879fe9efa3a123215a12644abcf127e48f31cfa5e9d6787e27132"},"schema_version":"1.0"},"canonical_sha256":"1e06ec9922a856c3e082cc9527cd613c79fc339d0bbcf3bd007569752440a095","source":{"kind":"arxiv","id":"2505.21368","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.21368","created_at":"2026-07-05T11:10:40Z"},{"alias_kind":"arxiv_version","alias_value":"2505.21368v1","created_at":"2026-07-05T11:10:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.21368","created_at":"2026-07-05T11:10:40Z"},{"alias_kind":"pith_short_12","alias_value":"DYDOZGJCVBLM","created_at":"2026-07-05T11:10:40Z"},{"alias_kind":"pith_short_16","alias_value":"DYDOZGJCVBLMHYEC","created_at":"2026-07-05T11:10:40Z"},{"alias_kind":"pith_short_8","alias_value":"DYDOZGJC","created_at":"2026-07-05T11:10:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:DYDOZGJCVBLMHYECZSKSPTLBHR","target":"record","payload":{"canonical_record":{"source":{"id":"2505.21368","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-05-27T15:57:28Z","cross_cats_sorted":[],"title_canon_sha256":"364913904e197e7b013fefa2e8e760f89f6f98206e052d15bb9dfc0f4bb10a7e","abstract_canon_sha256":"befe5088c85879fe9efa3a123215a12644abcf127e48f31cfa5e9d6787e27132"},"schema_version":"1.0"},"canonical_sha256":"1e06ec9922a856c3e082cc9527cd613c79fc339d0bbcf3bd007569752440a095","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:10:40.843655Z","signature_b64":"g4gpnsM1yapP0GbI1521H7ZMfOY0h0h0rMVJmyk8BYLho3CTKEZWbhwwFAY+SbNlWgD9qkZ40Z+kgcoVAq6vDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1e06ec9922a856c3e082cc9527cd613c79fc339d0bbcf3bd007569752440a095","last_reissued_at":"2026-07-05T11:10:40.843145Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:10:40.843145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2505.21368","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":"2026-07-05T11:10:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P4UP/vP3xkO0QnNeA3pHK+jCZRIri9DrFGyIjgXmguabeC/6bdkVDShQ6tuUR4y1jzBbR05ztM+asnzSsacLDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T02:34:53.236577Z"},"content_sha256":"be649c8755a955138bfd39b3d5f1ff0596fcc8d4f94190f275dd84f01ceaa58d","schema_version":"1.0","event_id":"sha256:be649c8755a955138bfd39b3d5f1ff0596fcc8d4f94190f275dd84f01ceaa58d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:DYDOZGJCVBLMHYECZSKSPTLBHR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Classifying the derivatives of light curves for overcontact eclipsing binaries","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Shinjirou Kouzuma","submitted_at":"2025-05-27T15:57:28Z","abstract_excerpt":"Recent studies indicate that the physical properties of eclipsing binaries can be extracted from the derivatives of their light curves. A classification scheme for the derivatives of light curves would be helpful for identifying key characteristics of eclipsing binaries. In this study, we propose a new classification method for the light curves of overcontact eclipsing binaries by using their derivatives. We synthesized 89,670 sample light curves of overcontact binaries and categorized them into five types on the basis of their first to fourth derivatives. For each type, we examined the statis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.21368","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/2505.21368/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":"2026-07-05T11:10:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rf2uiTVxT8nF/0u/zYx4ECpJ3BYVGbq3CVcHNR+GJYh8GkPJEAYcdSdMnGloTJoOgwzRhCkCzLz4+GrO0ZwkAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T02:34:53.237133Z"},"content_sha256":"0d796729cab0c67ca2cb71e774e363363d62946575603761021c25600f6546b4","schema_version":"1.0","event_id":"sha256:0d796729cab0c67ca2cb71e774e363363d62946575603761021c25600f6546b4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DYDOZGJCVBLMHYECZSKSPTLBHR/bundle.json","state_url":"https://pith.science/pith/DYDOZGJCVBLMHYECZSKSPTLBHR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DYDOZGJCVBLMHYECZSKSPTLBHR/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":"2026-08-08T02:34:53Z","links":{"resolver":"https://pith.science/pith/DYDOZGJCVBLMHYECZSKSPTLBHR","bundle":"https://pith.science/pith/DYDOZGJCVBLMHYECZSKSPTLBHR/bundle.json","state":"https://pith.science/pith/DYDOZGJCVBLMHYECZSKSPTLBHR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DYDOZGJCVBLMHYECZSKSPTLBHR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:DYDOZGJCVBLMHYECZSKSPTLBHR","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":"befe5088c85879fe9efa3a123215a12644abcf127e48f31cfa5e9d6787e27132","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-05-27T15:57:28Z","title_canon_sha256":"364913904e197e7b013fefa2e8e760f89f6f98206e052d15bb9dfc0f4bb10a7e"},"schema_version":"1.0","source":{"id":"2505.21368","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.21368","created_at":"2026-07-05T11:10:40Z"},{"alias_kind":"arxiv_version","alias_value":"2505.21368v1","created_at":"2026-07-05T11:10:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.21368","created_at":"2026-07-05T11:10:40Z"},{"alias_kind":"pith_short_12","alias_value":"DYDOZGJCVBLM","created_at":"2026-07-05T11:10:40Z"},{"alias_kind":"pith_short_16","alias_value":"DYDOZGJCVBLMHYEC","created_at":"2026-07-05T11:10:40Z"},{"alias_kind":"pith_short_8","alias_value":"DYDOZGJC","created_at":"2026-07-05T11:10:40Z"}],"graph_snapshots":[{"event_id":"sha256:0d796729cab0c67ca2cb71e774e363363d62946575603761021c25600f6546b4","target":"graph","created_at":"2026-07-05T11:10:40Z","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/2505.21368/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recent studies indicate that the physical properties of eclipsing binaries can be extracted from the derivatives of their light curves. A classification scheme for the derivatives of light curves would be helpful for identifying key characteristics of eclipsing binaries. In this study, we propose a new classification method for the light curves of overcontact eclipsing binaries by using their derivatives. We synthesized 89,670 sample light curves of overcontact binaries and categorized them into five types on the basis of their first to fourth derivatives. For each type, we examined the statis","authors_text":"Shinjirou Kouzuma","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-05-27T15:57:28Z","title":"Classifying the derivatives of light curves for overcontact eclipsing binaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.21368","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:be649c8755a955138bfd39b3d5f1ff0596fcc8d4f94190f275dd84f01ceaa58d","target":"record","created_at":"2026-07-05T11:10:40Z","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":"befe5088c85879fe9efa3a123215a12644abcf127e48f31cfa5e9d6787e27132","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-05-27T15:57:28Z","title_canon_sha256":"364913904e197e7b013fefa2e8e760f89f6f98206e052d15bb9dfc0f4bb10a7e"},"schema_version":"1.0","source":{"id":"2505.21368","kind":"arxiv","version":1}},"canonical_sha256":"1e06ec9922a856c3e082cc9527cd613c79fc339d0bbcf3bd007569752440a095","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1e06ec9922a856c3e082cc9527cd613c79fc339d0bbcf3bd007569752440a095","first_computed_at":"2026-07-05T11:10:40.843145Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:10:40.843145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"g4gpnsM1yapP0GbI1521H7ZMfOY0h0h0rMVJmyk8BYLho3CTKEZWbhwwFAY+SbNlWgD9qkZ40Z+kgcoVAq6vDg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:10:40.843655Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.21368","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be649c8755a955138bfd39b3d5f1ff0596fcc8d4f94190f275dd84f01ceaa58d","sha256:0d796729cab0c67ca2cb71e774e363363d62946575603761021c25600f6546b4"],"state_sha256":"92a2bc71a817baac60db3f78fae52bf40bb553d1311b550a765af71886d5ac5a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+zRDKFmLqMUKlKdqfhSqsJaIAXyI1VdFovdunxsgMKaCz5VRSpff+4txPG94Bk1GduQHqIXOBCBViy8THYQtCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T02:34:53.241446Z","bundle_sha256":"207ef1d1f1a4d7fcb2d94bbd6265c399ab6835328781c343692cc18e658eb016"}}