{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:EE3JCIXP7FLLG23PDZQ66X5WTM","short_pith_number":"pith:EE3JCIXP","canonical_record":{"source":{"id":"1304.7503","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-04-28T19:20:52Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"ebe0ad39cd5aa63c4db308de775aac8f2af5102bebac965b52aeaf0bec15683d","abstract_canon_sha256":"5fb5f54fa3628f529f2ef812fd18940f334ce83daa66d8f34945f7ba233ff5a9"},"schema_version":"1.0"},"canonical_sha256":"21369122eff956b36b6f1e61ef5fb69b3f88e975c81f3f52020ee50fa9cd9780","source":{"kind":"arxiv","id":"1304.7503","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.7503","created_at":"2026-05-18T01:50:14Z"},{"alias_kind":"arxiv_version","alias_value":"1304.7503v2","created_at":"2026-05-18T01:50:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.7503","created_at":"2026-05-18T01:50:14Z"},{"alias_kind":"pith_short_12","alias_value":"EE3JCIXP7FLL","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EE3JCIXP7FLLG23P","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EE3JCIXP","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:EE3JCIXP7FLLG23PDZQ66X5WTM","target":"record","payload":{"canonical_record":{"source":{"id":"1304.7503","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-04-28T19:20:52Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"ebe0ad39cd5aa63c4db308de775aac8f2af5102bebac965b52aeaf0bec15683d","abstract_canon_sha256":"5fb5f54fa3628f529f2ef812fd18940f334ce83daa66d8f34945f7ba233ff5a9"},"schema_version":"1.0"},"canonical_sha256":"21369122eff956b36b6f1e61ef5fb69b3f88e975c81f3f52020ee50fa9cd9780","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:14.895489Z","signature_b64":"NGz4jghJe1q0wB57tn+/6gp8UPp/+jUCmmU2Qk6n15Oumuacv9TEoU5jJVjkVruXzYovhvWvXRx2VjpgEi8DAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"21369122eff956b36b6f1e61ef5fb69b3f88e975c81f3f52020ee50fa9cd9780","last_reissued_at":"2026-05-18T01:50:14.895085Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:14.895085Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.7503","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:50:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w1atbVLKA4VH2U7XnE7rkyOrTdZIaL/9Ce9Q7EFbIWV28PIGZRmiHcxqoTIfv8eC8yRlJQdkmmOuZLTAs0QnBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T14:45:55.661377Z"},"content_sha256":"3246fb81ed41d29fa99d49c1a0c6d60079bdd73d339e3d5091368e954536ea28","schema_version":"1.0","event_id":"sha256:3246fb81ed41d29fa99d49c1a0c6d60079bdd73d339e3d5091368e954536ea28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:EE3JCIXP7FLLG23PDZQ66X5WTM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"100-year DASCH Light Curves of Kepler Planet-Candidate Host Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Dimitar Sasselov, Edward Los, Jonathan Grindlay, Mathieu Servillat, Sumin Tang","submitted_at":"2013-04-28T19:20:52Z","abstract_excerpt":"We present 100 year light curves of Kepler planet-candidate host stars from the Digital Access to a Sky Century at Harvard (DASCH) project. 261 out of 997 host stars have at least 10 good measurements on DASCH scans of the Harvard plates. 109 of them have at least 100 good measurements, including 70% (73 out of 104) of all host stars with g<=13 mag, and 44% (100 out of 228) of all host stars with g<=14 mag. Our typical photometric uncertainty is ~0.1-0.15 mag. No variation is found at 3-sigma level for these host stars, including 21 confirmed or candidate hot Jupiter systems which might be exp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.7503","kind":"arxiv","version":2},"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":"2026-05-18T01:50:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sXQCrpFiHELxoulAGLEKjqhuX2prEpc3zazgxYIXVmaNShs515K+G/GZWiXG5fCqd8T2iSJeinMZICQ7eJvwBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T14:45:55.662043Z"},"content_sha256":"e84a5ed2bfc34ac6a8cc97146a45c09c76f8279d70a71685037240f8e2f3120f","schema_version":"1.0","event_id":"sha256:e84a5ed2bfc34ac6a8cc97146a45c09c76f8279d70a71685037240f8e2f3120f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EE3JCIXP7FLLG23PDZQ66X5WTM/bundle.json","state_url":"https://pith.science/pith/EE3JCIXP7FLLG23PDZQ66X5WTM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EE3JCIXP7FLLG23PDZQ66X5WTM/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":"2026-05-24T14:45:55Z","links":{"resolver":"https://pith.science/pith/EE3JCIXP7FLLG23PDZQ66X5WTM","bundle":"https://pith.science/pith/EE3JCIXP7FLLG23PDZQ66X5WTM/bundle.json","state":"https://pith.science/pith/EE3JCIXP7FLLG23PDZQ66X5WTM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EE3JCIXP7FLLG23PDZQ66X5WTM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:EE3JCIXP7FLLG23PDZQ66X5WTM","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":"5fb5f54fa3628f529f2ef812fd18940f334ce83daa66d8f34945f7ba233ff5a9","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-04-28T19:20:52Z","title_canon_sha256":"ebe0ad39cd5aa63c4db308de775aac8f2af5102bebac965b52aeaf0bec15683d"},"schema_version":"1.0","source":{"id":"1304.7503","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.7503","created_at":"2026-05-18T01:50:14Z"},{"alias_kind":"arxiv_version","alias_value":"1304.7503v2","created_at":"2026-05-18T01:50:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.7503","created_at":"2026-05-18T01:50:14Z"},{"alias_kind":"pith_short_12","alias_value":"EE3JCIXP7FLL","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EE3JCIXP7FLLG23P","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EE3JCIXP","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:e84a5ed2bfc34ac6a8cc97146a45c09c76f8279d70a71685037240f8e2f3120f","target":"graph","created_at":"2026-05-18T01:50:14Z","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 100 year light curves of Kepler planet-candidate host stars from the Digital Access to a Sky Century at Harvard (DASCH) project. 261 out of 997 host stars have at least 10 good measurements on DASCH scans of the Harvard plates. 109 of them have at least 100 good measurements, including 70% (73 out of 104) of all host stars with g<=13 mag, and 44% (100 out of 228) of all host stars with g<=14 mag. Our typical photometric uncertainty is ~0.1-0.15 mag. No variation is found at 3-sigma level for these host stars, including 21 confirmed or candidate hot Jupiter systems which might be exp","authors_text":"Dimitar Sasselov, Edward Los, Jonathan Grindlay, Mathieu Servillat, Sumin Tang","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-04-28T19:20:52Z","title":"100-year DASCH Light Curves of Kepler Planet-Candidate Host Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.7503","kind":"arxiv","version":2},"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":"sha256:3246fb81ed41d29fa99d49c1a0c6d60079bdd73d339e3d5091368e954536ea28","target":"record","created_at":"2026-05-18T01:50:14Z","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":"5fb5f54fa3628f529f2ef812fd18940f334ce83daa66d8f34945f7ba233ff5a9","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-04-28T19:20:52Z","title_canon_sha256":"ebe0ad39cd5aa63c4db308de775aac8f2af5102bebac965b52aeaf0bec15683d"},"schema_version":"1.0","source":{"id":"1304.7503","kind":"arxiv","version":2}},"canonical_sha256":"21369122eff956b36b6f1e61ef5fb69b3f88e975c81f3f52020ee50fa9cd9780","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"21369122eff956b36b6f1e61ef5fb69b3f88e975c81f3f52020ee50fa9cd9780","first_computed_at":"2026-05-18T01:50:14.895085Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:14.895085Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NGz4jghJe1q0wB57tn+/6gp8UPp/+jUCmmU2Qk6n15Oumuacv9TEoU5jJVjkVruXzYovhvWvXRx2VjpgEi8DAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:14.895489Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.7503","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3246fb81ed41d29fa99d49c1a0c6d60079bdd73d339e3d5091368e954536ea28","sha256:e84a5ed2bfc34ac6a8cc97146a45c09c76f8279d70a71685037240f8e2f3120f"],"state_sha256":"9c4d8de23a81fb103b288db703eb505eb5c22c5add1002aea8fac7b5f6ef63a3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ypT2tkWOG2LwJtgU1BKWKoL806jqMrNMbQjFGz4I9uaKaRigT3PlybmVU2FQrO/ppW2GYFsRLhwDI99wwDneAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T14:45:55.665145Z","bundle_sha256":"8a6986b17ca35416562f3ffb28fa8f95079e173ff5ca74ebc02ca542d3c75a6c"}}