{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:X5TI57QCIAXUQAQ7S2OZZOWNTA","short_pith_number":"pith:X5TI57QC","canonical_record":{"source":{"id":"2108.13615","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-31T04:51:12Z","cross_cats_sorted":[],"title_canon_sha256":"357dfb434c5aa25200101fae81759275cd569bc24845215aa4595a6ac44bff45","abstract_canon_sha256":"87c80b99c7f98c8847e837075c6656917bf7f3c8c4e20a41a676753f12dd8e93"},"schema_version":"1.0"},"canonical_sha256":"bf668efe02402f48021f969d9cbacd9800c7bef46f5137c094b13d0002cf96fe","source":{"kind":"arxiv","id":"2108.13615","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.13615","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"arxiv_version","alias_value":"2108.13615v1","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.13615","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_12","alias_value":"X5TI57QCIAXU","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_16","alias_value":"X5TI57QCIAXUQAQ7","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_8","alias_value":"X5TI57QC","created_at":"2026-07-05T03:23:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:X5TI57QCIAXUQAQ7S2OZZOWNTA","target":"record","payload":{"canonical_record":{"source":{"id":"2108.13615","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-31T04:51:12Z","cross_cats_sorted":[],"title_canon_sha256":"357dfb434c5aa25200101fae81759275cd569bc24845215aa4595a6ac44bff45","abstract_canon_sha256":"87c80b99c7f98c8847e837075c6656917bf7f3c8c4e20a41a676753f12dd8e93"},"schema_version":"1.0"},"canonical_sha256":"bf668efe02402f48021f969d9cbacd9800c7bef46f5137c094b13d0002cf96fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:23:49.194109Z","signature_b64":"J+qCoriFPps3CQunJF8mSwKmwgj/gfrPYkzl1qRRzhj1dsL1QZ+V3iElzJ6k5xi3k5WNx1uvG9EPJAb8HOBGBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf668efe02402f48021f969d9cbacd9800c7bef46f5137c094b13d0002cf96fe","last_reissued_at":"2026-07-05T03:23:49.193733Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:23:49.193733Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.13615","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":"2026-07-05T03:23:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ugd0w/NLJVCO5DgiHhX7Tpw/bqJP1P1C8scgXe9R+EfVjjLabI3O4NlPITFRvuGzURWPApBbKvN93LTtQJjACQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T00:53:33.560523Z"},"content_sha256":"461d60eb75309647d0fe4244608a66188c27b67097da5c93e721e08e049e7064","schema_version":"1.0","event_id":"sha256:461d60eb75309647d0fe4244608a66188c27b67097da5c93e721e08e049e7064"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:X5TI57QCIAXUQAQ7S2OZZOWNTA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"BM UMa: a middle shallow contact binary at pre-transition stage of evolution from W-type to A-type","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Prasit, B. Soonthornthum, C. Buisset, S. Poshyachinda, T. L\\'epine, T. Sarotsakulchai","submitted_at":"2021-08-31T04:51:12Z","abstract_excerpt":"In this study, all unpublished time series photometric data of BM UMa ($q \\sim$ 2.0, P = 0.2712\\,d) from available archives were re-investigated together with new data taken from the TNT-2.4m of the Thai National Observatory (TNO). Based on period analysis, there is a short-term variation superimposed on the long-term period decrease. The trend of period change can be fitted with a downward parabolic curve indicating a period decrease at a rate of $\\mathrm{d}P/\\mathrm{d}t = -3.36(\\pm 0.02)\\times10^{-8}$ d $\\textrm{yr}^{-1}$. This long-term period decrease can be explained by mass transfer from"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.13615","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/2108.13615/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":"2026-07-05T03:23:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+VzFb3HEVGGTfeD7UMLggvbRr/5/xFhK5NDucFcJbO70Oz4uJBfOXMp/op1y9/0ZC/pbmtnSepGWO6hHWYAFBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T00:53:33.561042Z"},"content_sha256":"b0892c558d5881a60da7984f6a38aca77b5cfc31fe257270d7818775ed3ea873","schema_version":"1.0","event_id":"sha256:b0892c558d5881a60da7984f6a38aca77b5cfc31fe257270d7818775ed3ea873"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X5TI57QCIAXUQAQ7S2OZZOWNTA/bundle.json","state_url":"https://pith.science/pith/X5TI57QCIAXUQAQ7S2OZZOWNTA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X5TI57QCIAXUQAQ7S2OZZOWNTA/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":"2026-08-22T00:53:33Z","links":{"resolver":"https://pith.science/pith/X5TI57QCIAXUQAQ7S2OZZOWNTA","bundle":"https://pith.science/pith/X5TI57QCIAXUQAQ7S2OZZOWNTA/bundle.json","state":"https://pith.science/pith/X5TI57QCIAXUQAQ7S2OZZOWNTA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X5TI57QCIAXUQAQ7S2OZZOWNTA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:X5TI57QCIAXUQAQ7S2OZZOWNTA","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":"87c80b99c7f98c8847e837075c6656917bf7f3c8c4e20a41a676753f12dd8e93","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-31T04:51:12Z","title_canon_sha256":"357dfb434c5aa25200101fae81759275cd569bc24845215aa4595a6ac44bff45"},"schema_version":"1.0","source":{"id":"2108.13615","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.13615","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"arxiv_version","alias_value":"2108.13615v1","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.13615","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_12","alias_value":"X5TI57QCIAXU","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_16","alias_value":"X5TI57QCIAXUQAQ7","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_8","alias_value":"X5TI57QC","created_at":"2026-07-05T03:23:49Z"}],"graph_snapshots":[{"event_id":"sha256:b0892c558d5881a60da7984f6a38aca77b5cfc31fe257270d7818775ed3ea873","target":"graph","created_at":"2026-07-05T03:23:49Z","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/2108.13615/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this study, all unpublished time series photometric data of BM UMa ($q \\sim$ 2.0, P = 0.2712\\,d) from available archives were re-investigated together with new data taken from the TNT-2.4m of the Thai National Observatory (TNO). Based on period analysis, there is a short-term variation superimposed on the long-term period decrease. The trend of period change can be fitted with a downward parabolic curve indicating a period decrease at a rate of $\\mathrm{d}P/\\mathrm{d}t = -3.36(\\pm 0.02)\\times10^{-8}$ d $\\textrm{yr}^{-1}$. This long-term period decrease can be explained by mass transfer from","authors_text":"A. Prasit, B. Soonthornthum, C. Buisset, S. Poshyachinda, T. L\\'epine, T. Sarotsakulchai","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-31T04:51:12Z","title":"BM UMa: a middle shallow contact binary at pre-transition stage of evolution from W-type to A-type"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.13615","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":"sha256:461d60eb75309647d0fe4244608a66188c27b67097da5c93e721e08e049e7064","target":"record","created_at":"2026-07-05T03:23:49Z","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":"87c80b99c7f98c8847e837075c6656917bf7f3c8c4e20a41a676753f12dd8e93","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-31T04:51:12Z","title_canon_sha256":"357dfb434c5aa25200101fae81759275cd569bc24845215aa4595a6ac44bff45"},"schema_version":"1.0","source":{"id":"2108.13615","kind":"arxiv","version":1}},"canonical_sha256":"bf668efe02402f48021f969d9cbacd9800c7bef46f5137c094b13d0002cf96fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bf668efe02402f48021f969d9cbacd9800c7bef46f5137c094b13d0002cf96fe","first_computed_at":"2026-07-05T03:23:49.193733Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:23:49.193733Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J+qCoriFPps3CQunJF8mSwKmwgj/gfrPYkzl1qRRzhj1dsL1QZ+V3iElzJ6k5xi3k5WNx1uvG9EPJAb8HOBGBg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:23:49.194109Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.13615","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:461d60eb75309647d0fe4244608a66188c27b67097da5c93e721e08e049e7064","sha256:b0892c558d5881a60da7984f6a38aca77b5cfc31fe257270d7818775ed3ea873"],"state_sha256":"9d8a60fe1706be820303b351c61372cd8b45e2445d49a82e695c74a4a30db2cd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZoB6BWuavcjO81aRz7opTbxw58o7iabOvhrKBtZ9nx41H+Q94GER65BOxyQQUdFqE3Nqh7vSv1M6pEzBo47NCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T00:53:33.566242Z","bundle_sha256":"9d1036b4f1ff92cf1f3f07d132a89abf58334da49be550b9e3d342cd5cd13982"}}