{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:7LUW3OW2B7AI5PRAEDQTHWUWEJ","short_pith_number":"pith:7LUW3OW2","canonical_record":{"source":{"id":"1507.01827","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-07T14:45:08Z","cross_cats_sorted":[],"title_canon_sha256":"95ba6445c4665bd7b91604503ed5a2bdebbc74301b5af1d54e1f8b35a99da8af","abstract_canon_sha256":"cf10f4135bdd08ab8f89d78fefca1f1911f64d986ebbcde2942ff81f1f930a30"},"schema_version":"1.0"},"canonical_sha256":"fae96dbada0fc08ebe2020e133da9622446dd531bec13daab5402cde95d01ae0","source":{"kind":"arxiv","id":"1507.01827","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.01827","created_at":"2026-05-18T01:26:18Z"},{"alias_kind":"arxiv_version","alias_value":"1507.01827v1","created_at":"2026-05-18T01:26:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01827","created_at":"2026-05-18T01:26:18Z"},{"alias_kind":"pith_short_12","alias_value":"7LUW3OW2B7AI","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"7LUW3OW2B7AI5PRA","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"7LUW3OW2","created_at":"2026-05-18T12:29:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:7LUW3OW2B7AI5PRAEDQTHWUWEJ","target":"record","payload":{"canonical_record":{"source":{"id":"1507.01827","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-07T14:45:08Z","cross_cats_sorted":[],"title_canon_sha256":"95ba6445c4665bd7b91604503ed5a2bdebbc74301b5af1d54e1f8b35a99da8af","abstract_canon_sha256":"cf10f4135bdd08ab8f89d78fefca1f1911f64d986ebbcde2942ff81f1f930a30"},"schema_version":"1.0"},"canonical_sha256":"fae96dbada0fc08ebe2020e133da9622446dd531bec13daab5402cde95d01ae0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:18.149300Z","signature_b64":"ou4XgQW1I8rbmg3lVRrttmamkKIKBxgQPPalTh/Qhjr7xNMhGRamGVyswDSsmJGEJLj6acUZWm2PWIgs3lKtBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fae96dbada0fc08ebe2020e133da9622446dd531bec13daab5402cde95d01ae0","last_reissued_at":"2026-05-18T01:26:18.148676Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:18.148676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.01827","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":"2026-05-18T01:26:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jELXW0he8wHM6/F29Y/XnvmmCNk+IpTJ67AVLMV/OGnV7QxxFdG/mi3dNh3aMN94W8JXCDjoCE/xnLcG8ngpAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:25:57.688657Z"},"content_sha256":"8cb01591595968f217fdad90bd45a62b89e1ae082eeb89ccf5b5b9a52ca3c9e5","schema_version":"1.0","event_id":"sha256:8cb01591595968f217fdad90bd45a62b89e1ae082eeb89ccf5b5b9a52ca3c9e5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:7LUW3OW2B7AI5PRAEDQTHWUWEJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Asteroseismology of solar-type stars with K2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Miglio, A. Serenelli, B. Mosser, C. A. Latham, C. Karoff, C. R, D. Huber, D. L. Buzasi, D. R. Soderblom, D. Salabert, D. Stello, D. W. Latham, F. Marcadon, G. Houdek, G. R. Davies, H. Kjeldsen, H. M. Antia, H. R. Coelho, I. W. Roxburgh, J. Christensen-Dalsgaard, K. Verma, L. A. Buchhave, L. Casagrande, L. Gizon, M. N. Lund, M. S. Lundkvist, O. Benomar, O. L. Creevey, P. Gaulme, R. A. Garc, R. Handberg, S. Basu, S. B. Howell, S. Deheuvels, S. D. Kawaler, S. Hekker, S. Mathur, T. Appourchaux, T. Barclay, T. Kallinger, T. L. Campante, T. R. Bedding, T. R. White, V. Silva Aguirre, W. H. Ball, W. J. Chaplin, Y. Elsworth","submitted_at":"2015-07-07T14:45:08Z","abstract_excerpt":"We present the first detections by the NASA K2 Mission of oscillations in solar-type stars, using short-cadence data collected during K2 Campaign\\,1 (C1). We understand the asteroseismic detection thresholds for C1-like levels of photometric performance, and we can detect oscillations in subgiants having dominant oscillation frequencies around $1000\\,\\rm \\mu Hz$. Changes to the operation of the fine-guidance sensors are expected to give significant improvements in the high-frequency performance from C3 onwards. A reduction in the excess high-frequency noise by a factor of two-and-a-half in amp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01827","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":"2026-05-18T01:26:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r2G6thMODp9g6/Q+WYMkwk9UDVQzHRlWPfGSWEMQ4CoK7vduHP7g9AboBo2dkmKfv5IFl9uXSbRqGBNn0sevBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:25:57.689313Z"},"content_sha256":"744686e61d9a68d72fac977bf194326e8a1de28514cd2044c9f353030bdafd15","schema_version":"1.0","event_id":"sha256:744686e61d9a68d72fac977bf194326e8a1de28514cd2044c9f353030bdafd15"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7LUW3OW2B7AI5PRAEDQTHWUWEJ/bundle.json","state_url":"https://pith.science/pith/7LUW3OW2B7AI5PRAEDQTHWUWEJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7LUW3OW2B7AI5PRAEDQTHWUWEJ/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":"2026-05-25T16:25:57Z","links":{"resolver":"https://pith.science/pith/7LUW3OW2B7AI5PRAEDQTHWUWEJ","bundle":"https://pith.science/pith/7LUW3OW2B7AI5PRAEDQTHWUWEJ/bundle.json","state":"https://pith.science/pith/7LUW3OW2B7AI5PRAEDQTHWUWEJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7LUW3OW2B7AI5PRAEDQTHWUWEJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:7LUW3OW2B7AI5PRAEDQTHWUWEJ","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":"cf10f4135bdd08ab8f89d78fefca1f1911f64d986ebbcde2942ff81f1f930a30","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-07T14:45:08Z","title_canon_sha256":"95ba6445c4665bd7b91604503ed5a2bdebbc74301b5af1d54e1f8b35a99da8af"},"schema_version":"1.0","source":{"id":"1507.01827","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.01827","created_at":"2026-05-18T01:26:18Z"},{"alias_kind":"arxiv_version","alias_value":"1507.01827v1","created_at":"2026-05-18T01:26:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01827","created_at":"2026-05-18T01:26:18Z"},{"alias_kind":"pith_short_12","alias_value":"7LUW3OW2B7AI","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"7LUW3OW2B7AI5PRA","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"7LUW3OW2","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:744686e61d9a68d72fac977bf194326e8a1de28514cd2044c9f353030bdafd15","target":"graph","created_at":"2026-05-18T01:26:18Z","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":"We present the first detections by the NASA K2 Mission of oscillations in solar-type stars, using short-cadence data collected during K2 Campaign\\,1 (C1). We understand the asteroseismic detection thresholds for C1-like levels of photometric performance, and we can detect oscillations in subgiants having dominant oscillation frequencies around $1000\\,\\rm \\mu Hz$. Changes to the operation of the fine-guidance sensors are expected to give significant improvements in the high-frequency performance from C3 onwards. A reduction in the excess high-frequency noise by a factor of two-and-a-half in amp","authors_text":"A. Miglio, A. Serenelli, B. Mosser, C. A. Latham, C. Karoff, C. R, D. Huber, D. L. Buzasi, D. R. Soderblom, D. Salabert, D. Stello, D. W. Latham, F. Marcadon, G. Houdek, G. R. Davies, H. Kjeldsen, H. M. Antia, H. R. Coelho, I. W. Roxburgh, J. Christensen-Dalsgaard, K. Verma, L. A. Buchhave, L. Casagrande, L. Gizon, M. N. Lund, M. S. Lundkvist, O. Benomar, O. L. Creevey, P. Gaulme, R. A. Garc, R. Handberg, S. Basu, S. B. Howell, S. Deheuvels, S. D. Kawaler, S. Hekker, S. Mathur, T. Appourchaux, T. Barclay, T. Kallinger, T. L. Campante, T. R. Bedding, T. R. White, V. Silva Aguirre, W. H. Ball, W. J. Chaplin, Y. Elsworth","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-07T14:45:08Z","title":"Asteroseismology of solar-type stars with K2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01827","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":"sha256:8cb01591595968f217fdad90bd45a62b89e1ae082eeb89ccf5b5b9a52ca3c9e5","target":"record","created_at":"2026-05-18T01:26:18Z","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":"cf10f4135bdd08ab8f89d78fefca1f1911f64d986ebbcde2942ff81f1f930a30","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-07T14:45:08Z","title_canon_sha256":"95ba6445c4665bd7b91604503ed5a2bdebbc74301b5af1d54e1f8b35a99da8af"},"schema_version":"1.0","source":{"id":"1507.01827","kind":"arxiv","version":1}},"canonical_sha256":"fae96dbada0fc08ebe2020e133da9622446dd531bec13daab5402cde95d01ae0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fae96dbada0fc08ebe2020e133da9622446dd531bec13daab5402cde95d01ae0","first_computed_at":"2026-05-18T01:26:18.148676Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:26:18.148676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ou4XgQW1I8rbmg3lVRrttmamkKIKBxgQPPalTh/Qhjr7xNMhGRamGVyswDSsmJGEJLj6acUZWm2PWIgs3lKtBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:26:18.149300Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.01827","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8cb01591595968f217fdad90bd45a62b89e1ae082eeb89ccf5b5b9a52ca3c9e5","sha256:744686e61d9a68d72fac977bf194326e8a1de28514cd2044c9f353030bdafd15"],"state_sha256":"a33f97cde704a3d3d3c63a019ba35ea407e691285803fda2ae853bc4e2b3d444"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4Hmd/AMcFq2+5BvJvrOHei2J5LgUTBmyrJbdMljEvHFUGZe7dBYbgl3+0dcHteC1JoVSvPzSv9UtGUVJFfgPBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:25:57.692631Z","bundle_sha256":"6fc18ad301c0796b94befe789e859d61691a82abb9082a8c6d2e4fafb9974c72"}}