{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:AWU6D5FHUWANNHR27ULJWHNSF6","short_pith_number":"pith:AWU6D5FH","canonical_record":{"source":{"id":"1508.06215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-25T16:33:49Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"1205da8b6b5d9aba7c02f612f26998e572aa1f2f48f0d56a471aa670e77d1059","abstract_canon_sha256":"e9450ca4c153e6e51ef160a0a7f50d517f52ef4811404fbb887b82e8557924e7"},"schema_version":"1.0"},"canonical_sha256":"05a9e1f4a7a580d69e3afd169b1db22f914b9fa34bd369ed13a5f3a0985c70ae","source":{"kind":"arxiv","id":"1508.06215","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.06215","created_at":"2026-05-18T01:34:46Z"},{"alias_kind":"arxiv_version","alias_value":"1508.06215v1","created_at":"2026-05-18T01:34:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.06215","created_at":"2026-05-18T01:34:46Z"},{"alias_kind":"pith_short_12","alias_value":"AWU6D5FHUWAN","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"AWU6D5FHUWANNHR2","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"AWU6D5FH","created_at":"2026-05-18T12:29:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:AWU6D5FHUWANNHR27ULJWHNSF6","target":"record","payload":{"canonical_record":{"source":{"id":"1508.06215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-25T16:33:49Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"1205da8b6b5d9aba7c02f612f26998e572aa1f2f48f0d56a471aa670e77d1059","abstract_canon_sha256":"e9450ca4c153e6e51ef160a0a7f50d517f52ef4811404fbb887b82e8557924e7"},"schema_version":"1.0"},"canonical_sha256":"05a9e1f4a7a580d69e3afd169b1db22f914b9fa34bd369ed13a5f3a0985c70ae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:34:46.421022Z","signature_b64":"vz6cqlGfv9S+iyApLBsKwAkmDJPYUb6TrRvZ3xhWNSyaNLF/lCDy4gzpbqFFDt9o9Tp+sO0trQLrX8g3MQaQCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"05a9e1f4a7a580d69e3afd169b1db22f914b9fa34bd369ed13a5f3a0985c70ae","last_reissued_at":"2026-05-18T01:34:46.420351Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:34:46.420351Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.06215","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":"2026-05-18T01:34:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v9cP7ruP87lTUneDLBDOXiy5vJQPTsmbsTkpr7hTbbLKSSYCkH+ebcVN/FgNstmLBqSmGOGnOJ6mpiwPQlr3Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T21:20:43.813542Z"},"content_sha256":"43289557f3a9b06e43cd444b1d16079bf9422c7bb93553088e0e5e74d3f7a9e6","schema_version":"1.0","event_id":"sha256:43289557f3a9b06e43cd444b1d16079bf9422c7bb93553088e0e5e74d3f7a9e6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:AWU6D5FHUWANNHR27ULJWHNSF6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ground-based transit observations of the HAT-P-18, HAT-P-19, HAT-P-27/WASP-40 and WASP-21 systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"A. Dathe, A. Ide, A. \\\"Ozd\\\"onmez, A. Pannicke, B. Ayd{\\i}n, B. Dincel, C. Adam, C. Ginski, C. Marka, D. Cohen, D. Dimitrov, D. Kjurkchieva, D. Puchalski, E. G\\\"o\\u{g}\\\"u\\c{s}, E. G\\\"uzel, E. Jensen, E. Kundra, F.J. Aceituno, J. Budaj, J. Greif, J.G. Schmidt, J.K. Guo, J.M. Ohlert, K. Werner, L. Marschall, M. Fernandez, M. Haas, M. Hackstein, M. Kitze, M. Mallonn, M. Mugrauer, M. Seeliger, M. Va\\v{n}ko, R. Chini, R. Errmann, R. Neuh\\\"auser, S. Buder, S. Hellmich, S. Mottola, S. Richter, St. Raetz, T. Ak, T. G\\\"uver, T.O.B. Schmidt, T. Pribulla, V. Wolf, W.P. Chen, X. Zhou, Z.Y. Wu","submitted_at":"2015-08-25T16:33:49Z","abstract_excerpt":"As part of our ongoing effort to investigate transit timing variations (TTVs) of known exoplanets, we monitored transits of the four exoplanets HAT-P-18b, HAT-P-19b, HAT-P-27b/WASP-40b and WASP-21b. All of them are suspected to show TTVs due to the known properties of their host systems based on the respective discovery papers. During the past three years 46 transit observations were carried out, mostly using telescopes of the Young Exoplanet Transit Initiative. The analyses are used to refine the systems orbital parameters. In all cases we found no hints for significant TTVs, or changes in th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.06215","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":"2026-05-18T01:34:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0NLc8zmgMopOHz3uQiCkZnSDUUoGYfUasNC/DTYHkhfiluUCLLBxj0KwRJbavgwuoJ3YCmk+2NgmrSNnH6/aBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T21:20:43.813918Z"},"content_sha256":"53df8344cb402d57cdea8cfa960a64c79fe8cac84453351007336d37bd3a8c08","schema_version":"1.0","event_id":"sha256:53df8344cb402d57cdea8cfa960a64c79fe8cac84453351007336d37bd3a8c08"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AWU6D5FHUWANNHR27ULJWHNSF6/bundle.json","state_url":"https://pith.science/pith/AWU6D5FHUWANNHR27ULJWHNSF6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AWU6D5FHUWANNHR27ULJWHNSF6/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":"2026-06-01T21:20:43Z","links":{"resolver":"https://pith.science/pith/AWU6D5FHUWANNHR27ULJWHNSF6","bundle":"https://pith.science/pith/AWU6D5FHUWANNHR27ULJWHNSF6/bundle.json","state":"https://pith.science/pith/AWU6D5FHUWANNHR27ULJWHNSF6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AWU6D5FHUWANNHR27ULJWHNSF6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:AWU6D5FHUWANNHR27ULJWHNSF6","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":"e9450ca4c153e6e51ef160a0a7f50d517f52ef4811404fbb887b82e8557924e7","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-25T16:33:49Z","title_canon_sha256":"1205da8b6b5d9aba7c02f612f26998e572aa1f2f48f0d56a471aa670e77d1059"},"schema_version":"1.0","source":{"id":"1508.06215","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.06215","created_at":"2026-05-18T01:34:46Z"},{"alias_kind":"arxiv_version","alias_value":"1508.06215v1","created_at":"2026-05-18T01:34:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.06215","created_at":"2026-05-18T01:34:46Z"},{"alias_kind":"pith_short_12","alias_value":"AWU6D5FHUWAN","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"AWU6D5FHUWANNHR2","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"AWU6D5FH","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:53df8344cb402d57cdea8cfa960a64c79fe8cac84453351007336d37bd3a8c08","target":"graph","created_at":"2026-05-18T01:34:46Z","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":"As part of our ongoing effort to investigate transit timing variations (TTVs) of known exoplanets, we monitored transits of the four exoplanets HAT-P-18b, HAT-P-19b, HAT-P-27b/WASP-40b and WASP-21b. All of them are suspected to show TTVs due to the known properties of their host systems based on the respective discovery papers. During the past three years 46 transit observations were carried out, mostly using telescopes of the Young Exoplanet Transit Initiative. The analyses are used to refine the systems orbital parameters. In all cases we found no hints for significant TTVs, or changes in th","authors_text":"A. Dathe, A. Ide, A. \\\"Ozd\\\"onmez, A. Pannicke, B. Ayd{\\i}n, B. Dincel, C. Adam, C. Ginski, C. Marka, D. Cohen, D. Dimitrov, D. Kjurkchieva, D. Puchalski, E. G\\\"o\\u{g}\\\"u\\c{s}, E. G\\\"uzel, E. Jensen, E. Kundra, F.J. Aceituno, J. Budaj, J. Greif, J.G. Schmidt, J.K. Guo, J.M. Ohlert, K. Werner, L. Marschall, M. Fernandez, M. Haas, M. Hackstein, M. Kitze, M. Mallonn, M. Mugrauer, M. Seeliger, M. Va\\v{n}ko, R. Chini, R. Errmann, R. Neuh\\\"auser, S. Buder, S. Hellmich, S. Mottola, S. Richter, St. Raetz, T. Ak, T. G\\\"uver, T.O.B. Schmidt, T. Pribulla, V. Wolf, W.P. Chen, X. Zhou, Z.Y. Wu","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-25T16:33:49Z","title":"Ground-based transit observations of the HAT-P-18, HAT-P-19, HAT-P-27/WASP-40 and WASP-21 systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.06215","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":"sha256:43289557f3a9b06e43cd444b1d16079bf9422c7bb93553088e0e5e74d3f7a9e6","target":"record","created_at":"2026-05-18T01:34:46Z","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":"e9450ca4c153e6e51ef160a0a7f50d517f52ef4811404fbb887b82e8557924e7","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-25T16:33:49Z","title_canon_sha256":"1205da8b6b5d9aba7c02f612f26998e572aa1f2f48f0d56a471aa670e77d1059"},"schema_version":"1.0","source":{"id":"1508.06215","kind":"arxiv","version":1}},"canonical_sha256":"05a9e1f4a7a580d69e3afd169b1db22f914b9fa34bd369ed13a5f3a0985c70ae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"05a9e1f4a7a580d69e3afd169b1db22f914b9fa34bd369ed13a5f3a0985c70ae","first_computed_at":"2026-05-18T01:34:46.420351Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:34:46.420351Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vz6cqlGfv9S+iyApLBsKwAkmDJPYUb6TrRvZ3xhWNSyaNLF/lCDy4gzpbqFFDt9o9Tp+sO0trQLrX8g3MQaQCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:34:46.421022Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.06215","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:43289557f3a9b06e43cd444b1d16079bf9422c7bb93553088e0e5e74d3f7a9e6","sha256:53df8344cb402d57cdea8cfa960a64c79fe8cac84453351007336d37bd3a8c08"],"state_sha256":"c8dfc544a1a5ed7da33ab96ba14f2db14c6eb377b9f681535b3ef35563517ef5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/xaGawEffaWlIoBKevLUSZSaBynVY2awIAwTKhIvaHP+W9kjIx6FKor8vgTWclU4Tfoa8ejn++V1+SF9jbLeBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T21:20:43.815890Z","bundle_sha256":"146b5c0fd6889b5202c7159a21fd1b6e86deb389a81dc0ac02bbd91e62312864"}}