{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:QGXJRNJJLCZ4FI6QLFIFDJK43C","short_pith_number":"pith:QGXJRNJJ","canonical_record":{"source":{"id":"1608.01042","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-08-03T01:38:56Z","cross_cats_sorted":[],"title_canon_sha256":"cf33f1ca99a5c91bb95736634166d7458820e2f437fc75e3a130cc72497f66d8","abstract_canon_sha256":"294a76ff1c234a16abbb619b72824f8091a0bbf3cbc98534a4113fa2cf255758"},"schema_version":"1.0"},"canonical_sha256":"81ae98b52958b3c2a3d0595051a55cd893e1d69a8bd3aade2d101f0911b503e0","source":{"kind":"arxiv","id":"1608.01042","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.01042","created_at":"2026-05-18T01:09:56Z"},{"alias_kind":"arxiv_version","alias_value":"1608.01042v1","created_at":"2026-05-18T01:09:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.01042","created_at":"2026-05-18T01:09:56Z"},{"alias_kind":"pith_short_12","alias_value":"QGXJRNJJLCZ4","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"QGXJRNJJLCZ4FI6Q","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"QGXJRNJJ","created_at":"2026-05-18T12:30:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:QGXJRNJJLCZ4FI6QLFIFDJK43C","target":"record","payload":{"canonical_record":{"source":{"id":"1608.01042","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-08-03T01:38:56Z","cross_cats_sorted":[],"title_canon_sha256":"cf33f1ca99a5c91bb95736634166d7458820e2f437fc75e3a130cc72497f66d8","abstract_canon_sha256":"294a76ff1c234a16abbb619b72824f8091a0bbf3cbc98534a4113fa2cf255758"},"schema_version":"1.0"},"canonical_sha256":"81ae98b52958b3c2a3d0595051a55cd893e1d69a8bd3aade2d101f0911b503e0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:56.819799Z","signature_b64":"HQHqHKSZM6Nn5HlidO8BRuPiQdNLPZhAkMdBXRAoJoXmQQBv++jHETn3egpJKt+6YKY6CVyL+O3TKsSqWoIZDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"81ae98b52958b3c2a3d0595051a55cd893e1d69a8bd3aade2d101f0911b503e0","last_reissued_at":"2026-05-18T01:09:56.818948Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:56.818948Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.01042","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":"2026-05-18T01:09:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mW05ydm7v62TXIId24j+ud6Im25pSHveUUOcAdtawZ+oDMdjJkPVMh9eNRsM/r9/g8ATIElLO+6zJkA4JnMDAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T14:46:04.388210Z"},"content_sha256":"1af35f58e42dbe9de03c36bf653a8139b0121a575517ca62798c51b5b4288001","schema_version":"1.0","event_id":"sha256:1af35f58e42dbe9de03c36bf653a8139b0121a575517ca62798c51b5b4288001"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:QGXJRNJJLCZ4FI6QLFIFDJK43C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photometric and period investigation of the late F-type overcontact binary II UMa","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"B. Zhang, J. Kreiner, J. Zhang, S.-B. Qian, X. Zhou","submitted_at":"2016-08-03T01:38:56Z","abstract_excerpt":"II UMa is a late F-type (F5) contact binary with a close-in tertiary and a distant visual companion. According to the four-color ($B$ $V$ $R_c$ $I_c$) light curves' solutions of II UMa, it is a high fill-out (f=$86.6\\,\\%$) and low mass ratio ($q = 0.172$) contact binary system, which indicate that it is at the late evolutionary stage of late-type tidal-locked binary stars. The mass of the primary star and secondary one are calculated to be $M_1 = 1.99M_\\odot$, $M_2 = 0.34M_\\odot$. The primary star has evolved from ZAMS, but it is still before TAMS, and the secondary star is even more evolved. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.01042","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":"2026-05-18T01:09:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PUkL22u84TDlLdY1baUmKDgigz5YPAWRfIMPcGs2pFRSLvbhSKs8cn7Gi8JfdEzdnsSAUdoZYCtL6sFwTJmYDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T14:46:04.388788Z"},"content_sha256":"7e7d312ccdaf71a8de58dc7e15d9f32675ccaa8cc7453476d9e90bb996dfd3f3","schema_version":"1.0","event_id":"sha256:7e7d312ccdaf71a8de58dc7e15d9f32675ccaa8cc7453476d9e90bb996dfd3f3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QGXJRNJJLCZ4FI6QLFIFDJK43C/bundle.json","state_url":"https://pith.science/pith/QGXJRNJJLCZ4FI6QLFIFDJK43C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QGXJRNJJLCZ4FI6QLFIFDJK43C/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":"2026-05-22T14:46:04Z","links":{"resolver":"https://pith.science/pith/QGXJRNJJLCZ4FI6QLFIFDJK43C","bundle":"https://pith.science/pith/QGXJRNJJLCZ4FI6QLFIFDJK43C/bundle.json","state":"https://pith.science/pith/QGXJRNJJLCZ4FI6QLFIFDJK43C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QGXJRNJJLCZ4FI6QLFIFDJK43C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:QGXJRNJJLCZ4FI6QLFIFDJK43C","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":"294a76ff1c234a16abbb619b72824f8091a0bbf3cbc98534a4113fa2cf255758","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-08-03T01:38:56Z","title_canon_sha256":"cf33f1ca99a5c91bb95736634166d7458820e2f437fc75e3a130cc72497f66d8"},"schema_version":"1.0","source":{"id":"1608.01042","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.01042","created_at":"2026-05-18T01:09:56Z"},{"alias_kind":"arxiv_version","alias_value":"1608.01042v1","created_at":"2026-05-18T01:09:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.01042","created_at":"2026-05-18T01:09:56Z"},{"alias_kind":"pith_short_12","alias_value":"QGXJRNJJLCZ4","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"QGXJRNJJLCZ4FI6Q","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"QGXJRNJJ","created_at":"2026-05-18T12:30:39Z"}],"graph_snapshots":[{"event_id":"sha256:7e7d312ccdaf71a8de58dc7e15d9f32675ccaa8cc7453476d9e90bb996dfd3f3","target":"graph","created_at":"2026-05-18T01:09:56Z","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":"II UMa is a late F-type (F5) contact binary with a close-in tertiary and a distant visual companion. According to the four-color ($B$ $V$ $R_c$ $I_c$) light curves' solutions of II UMa, it is a high fill-out (f=$86.6\\,\\%$) and low mass ratio ($q = 0.172$) contact binary system, which indicate that it is at the late evolutionary stage of late-type tidal-locked binary stars. The mass of the primary star and secondary one are calculated to be $M_1 = 1.99M_\\odot$, $M_2 = 0.34M_\\odot$. The primary star has evolved from ZAMS, but it is still before TAMS, and the secondary star is even more evolved. ","authors_text":"B. Zhang, J. Kreiner, J. Zhang, S.-B. Qian, X. Zhou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-08-03T01:38:56Z","title":"Photometric and period investigation of the late F-type overcontact binary II UMa"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.01042","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":"sha256:1af35f58e42dbe9de03c36bf653a8139b0121a575517ca62798c51b5b4288001","target":"record","created_at":"2026-05-18T01:09:56Z","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":"294a76ff1c234a16abbb619b72824f8091a0bbf3cbc98534a4113fa2cf255758","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-08-03T01:38:56Z","title_canon_sha256":"cf33f1ca99a5c91bb95736634166d7458820e2f437fc75e3a130cc72497f66d8"},"schema_version":"1.0","source":{"id":"1608.01042","kind":"arxiv","version":1}},"canonical_sha256":"81ae98b52958b3c2a3d0595051a55cd893e1d69a8bd3aade2d101f0911b503e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"81ae98b52958b3c2a3d0595051a55cd893e1d69a8bd3aade2d101f0911b503e0","first_computed_at":"2026-05-18T01:09:56.818948Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:56.818948Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HQHqHKSZM6Nn5HlidO8BRuPiQdNLPZhAkMdBXRAoJoXmQQBv++jHETn3egpJKt+6YKY6CVyL+O3TKsSqWoIZDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:56.819799Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.01042","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1af35f58e42dbe9de03c36bf653a8139b0121a575517ca62798c51b5b4288001","sha256:7e7d312ccdaf71a8de58dc7e15d9f32675ccaa8cc7453476d9e90bb996dfd3f3"],"state_sha256":"3dc9e71a3f6c22f4af792be79c48796e1f0f5c1be58be846f7f854ba939ad1e3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3XgtEAm96T5Pdtj9CT6f0mj3t5/XSNHO1zzZtHOvgdeObgKC48W3MR+Aw3V5Fc2yIjM0RbJHX31O4DPRmjRGBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T14:46:04.391730Z","bundle_sha256":"c8da5102439172cb9affc8a754726f300a644096c7c414a100478ebc84b98877"}}