{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:3AQY5WHWILNXLJ5VN63CNKA2LI","short_pith_number":"pith:3AQY5WHW","canonical_record":{"source":{"id":"1611.01158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-03T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"3101bb95ce66a2ac5c314bb650121c83d85459926cdcf652f842c6c8798d03ff","abstract_canon_sha256":"6c203de702bcbf9afa67761f22ba6e50d83856e31512f884921fc39df30eff89"},"schema_version":"1.0"},"canonical_sha256":"d8218ed8f642db75a7b56fb626a81a5a3d5c230fa177bacd2c7db126debe7ae5","source":{"kind":"arxiv","id":"1611.01158","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.01158","created_at":"2026-05-18T00:57:06Z"},{"alias_kind":"arxiv_version","alias_value":"1611.01158v1","created_at":"2026-05-18T00:57:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.01158","created_at":"2026-05-18T00:57:06Z"},{"alias_kind":"pith_short_12","alias_value":"3AQY5WHWILNX","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3AQY5WHWILNXLJ5V","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3AQY5WHW","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:3AQY5WHWILNXLJ5VN63CNKA2LI","target":"record","payload":{"canonical_record":{"source":{"id":"1611.01158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-03T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"3101bb95ce66a2ac5c314bb650121c83d85459926cdcf652f842c6c8798d03ff","abstract_canon_sha256":"6c203de702bcbf9afa67761f22ba6e50d83856e31512f884921fc39df30eff89"},"schema_version":"1.0"},"canonical_sha256":"d8218ed8f642db75a7b56fb626a81a5a3d5c230fa177bacd2c7db126debe7ae5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:57:06.739856Z","signature_b64":"ONhZdDHfQ2n9B8z3y5f/MaljxRjhktFT+YdvVu29S6s6KXOsWulDJsAshPq0i2mQIpFPVCmpcBd5MirPRsOWCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d8218ed8f642db75a7b56fb626a81a5a3d5c230fa177bacd2c7db126debe7ae5","last_reissued_at":"2026-05-18T00:57:06.739189Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:57:06.739189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.01158","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":"2026-05-18T00:57:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mELhIwFJMpQz6SJ4hFb5qUSE9Oavs2yK9oehRMVS5D4QkJSru6QJE6km46X3cnvea0aQcoW04c6bFhi+3X5jAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T17:40:55.950078Z"},"content_sha256":"f89994e801144635d6298dc16034a3d14d6e060a478b38c1639f66376fcc964b","schema_version":"1.0","event_id":"sha256:f89994e801144635d6298dc16034a3d14d6e060a478b38c1639f66376fcc964b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:3AQY5WHWILNXLJ5VN63CNKA2LI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The K2 M67 Study: An Evolved Blue Straggler in M67 from K2 Mission Asteroseismology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andrew Vanderburg, Dennis Stello, Emily Leiner, Robert Mathieu","submitted_at":"2016-11-03T20:00:02Z","abstract_excerpt":"Yellow straggler stars (YSSs) fall above the subgiant branch in optical color-magnitude diagrams, between the blue stragglers and the red giants. YSSs may represent a population of evolved blue stragglers, but none have the direct and precise mass and radius measurements needed to determine their evolutionary states and formation histories. Here we report the first asteroseismic mass and radius measurements of such a star, the yellow straggler S1237 in the open cluster M67. We apply asteroseismic scaling relations to a frequency analysis of the Kepler K2 light curve and find a mass of 2.9 $\\pm"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.01158","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":"2026-05-18T00:57:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vZ8ID1IWW9DoWevW7gTyVJtjnMmQKzbKYAdqmlgDVNmjOyp9rWg/y1WTr8YIrHsgfoTU/23ZNT1HtNsA8PLyDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T17:40:55.950777Z"},"content_sha256":"83de02ddba5cf26770af04709a353fc1856715a81bfe13271d4a5dcf004b9faf","schema_version":"1.0","event_id":"sha256:83de02ddba5cf26770af04709a353fc1856715a81bfe13271d4a5dcf004b9faf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3AQY5WHWILNXLJ5VN63CNKA2LI/bundle.json","state_url":"https://pith.science/pith/3AQY5WHWILNXLJ5VN63CNKA2LI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3AQY5WHWILNXLJ5VN63CNKA2LI/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":"2026-06-11T17:40:55Z","links":{"resolver":"https://pith.science/pith/3AQY5WHWILNXLJ5VN63CNKA2LI","bundle":"https://pith.science/pith/3AQY5WHWILNXLJ5VN63CNKA2LI/bundle.json","state":"https://pith.science/pith/3AQY5WHWILNXLJ5VN63CNKA2LI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3AQY5WHWILNXLJ5VN63CNKA2LI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3AQY5WHWILNXLJ5VN63CNKA2LI","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":"6c203de702bcbf9afa67761f22ba6e50d83856e31512f884921fc39df30eff89","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-03T20:00:02Z","title_canon_sha256":"3101bb95ce66a2ac5c314bb650121c83d85459926cdcf652f842c6c8798d03ff"},"schema_version":"1.0","source":{"id":"1611.01158","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.01158","created_at":"2026-05-18T00:57:06Z"},{"alias_kind":"arxiv_version","alias_value":"1611.01158v1","created_at":"2026-05-18T00:57:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.01158","created_at":"2026-05-18T00:57:06Z"},{"alias_kind":"pith_short_12","alias_value":"3AQY5WHWILNX","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3AQY5WHWILNXLJ5V","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3AQY5WHW","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:83de02ddba5cf26770af04709a353fc1856715a81bfe13271d4a5dcf004b9faf","target":"graph","created_at":"2026-05-18T00:57:06Z","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":"Yellow straggler stars (YSSs) fall above the subgiant branch in optical color-magnitude diagrams, between the blue stragglers and the red giants. YSSs may represent a population of evolved blue stragglers, but none have the direct and precise mass and radius measurements needed to determine their evolutionary states and formation histories. Here we report the first asteroseismic mass and radius measurements of such a star, the yellow straggler S1237 in the open cluster M67. We apply asteroseismic scaling relations to a frequency analysis of the Kepler K2 light curve and find a mass of 2.9 $\\pm","authors_text":"Andrew Vanderburg, Dennis Stello, Emily Leiner, Robert Mathieu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-03T20:00:02Z","title":"The K2 M67 Study: An Evolved Blue Straggler in M67 from K2 Mission Asteroseismology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.01158","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:f89994e801144635d6298dc16034a3d14d6e060a478b38c1639f66376fcc964b","target":"record","created_at":"2026-05-18T00:57:06Z","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":"6c203de702bcbf9afa67761f22ba6e50d83856e31512f884921fc39df30eff89","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-03T20:00:02Z","title_canon_sha256":"3101bb95ce66a2ac5c314bb650121c83d85459926cdcf652f842c6c8798d03ff"},"schema_version":"1.0","source":{"id":"1611.01158","kind":"arxiv","version":1}},"canonical_sha256":"d8218ed8f642db75a7b56fb626a81a5a3d5c230fa177bacd2c7db126debe7ae5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d8218ed8f642db75a7b56fb626a81a5a3d5c230fa177bacd2c7db126debe7ae5","first_computed_at":"2026-05-18T00:57:06.739189Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:06.739189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ONhZdDHfQ2n9B8z3y5f/MaljxRjhktFT+YdvVu29S6s6KXOsWulDJsAshPq0i2mQIpFPVCmpcBd5MirPRsOWCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:06.739856Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.01158","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f89994e801144635d6298dc16034a3d14d6e060a478b38c1639f66376fcc964b","sha256:83de02ddba5cf26770af04709a353fc1856715a81bfe13271d4a5dcf004b9faf"],"state_sha256":"99521973335d5d4b53950e3c9460f194bad8718c20652f946607f6a6c3835468"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Oh/gFUwQsiWPJYhPM+GT1VJOBDPXTyrkv1Pq0Bsr8Q3LWKzrzgrZp1Q2K8IqIdgBOqhEC8ESgKmbnJr3kyFdBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T17:40:55.955029Z","bundle_sha256":"b3585cfdc729409622d5b3b93cb25e71d1a536c529f1bb5b1359fcb8d5ac845f"}}