{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:QWS2KIJPU3GA2O63NRHSSC2XF5","short_pith_number":"pith:QWS2KIJP","canonical_record":{"source":{"id":"1804.10170","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-04-26T16:56:37Z","cross_cats_sorted":[],"title_canon_sha256":"643f0aae4210a97017cc0aceeec9de293ba2a36a1e3770daab4f2579af2acabb","abstract_canon_sha256":"074f62bd4bbb30caf0730ed26abba5d275d23419af08aed87e729262f35bd4be"},"schema_version":"1.0"},"canonical_sha256":"85a5a5212fa6cc0d3bdb6c4f290b572f71f11d44f4e8789f0423c198dc554265","source":{"kind":"arxiv","id":"1804.10170","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.10170","created_at":"2026-05-17T23:58:41Z"},{"alias_kind":"arxiv_version","alias_value":"1804.10170v2","created_at":"2026-05-17T23:58:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.10170","created_at":"2026-05-17T23:58:41Z"},{"alias_kind":"pith_short_12","alias_value":"QWS2KIJPU3GA","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"QWS2KIJPU3GA2O63","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"QWS2KIJP","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:QWS2KIJPU3GA2O63NRHSSC2XF5","target":"record","payload":{"canonical_record":{"source":{"id":"1804.10170","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-04-26T16:56:37Z","cross_cats_sorted":[],"title_canon_sha256":"643f0aae4210a97017cc0aceeec9de293ba2a36a1e3770daab4f2579af2acabb","abstract_canon_sha256":"074f62bd4bbb30caf0730ed26abba5d275d23419af08aed87e729262f35bd4be"},"schema_version":"1.0"},"canonical_sha256":"85a5a5212fa6cc0d3bdb6c4f290b572f71f11d44f4e8789f0423c198dc554265","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:58:41.603094Z","signature_b64":"uzgZykTS/IsgyqQfaNP7oL4egam9Br6sTwWVkYDrK1gcazYWCZSMp+4iGJbyTIyO5VReuHjpuhY48hX7pdWVDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"85a5a5212fa6cc0d3bdb6c4f290b572f71f11d44f4e8789f0423c198dc554265","last_reissued_at":"2026-05-17T23:58:41.602527Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:58:41.602527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.10170","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":"2026-05-17T23:58:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FcvgZgvFZuqqDVf9Gx7kIDlwFa42xQ4brV7//HVLGPAGJFGJW7ZJ1ImLM7aAM9967Tr6zeV2qAoZtHQ+G3qTCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T21:54:04.992301Z"},"content_sha256":"66ead7aa7559981d4388b4154be5ce4bb876f10ae98e9e64f8e87d50ed8e8dbe","schema_version":"1.0","event_id":"sha256:66ead7aa7559981d4388b4154be5ce4bb876f10ae98e9e64f8e87d50ed8e8dbe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:QWS2KIJPU3GA2O63NRHSSC2XF5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Effects of Stellar Companions on Exoplanet Radius Distributions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"David R. Ciardi, Johanna K. Teske, Lea A. Hirsch, Rachel A. Johnson, Steve B. Howell","submitted_at":"2018-04-26T16:56:37Z","abstract_excerpt":"Understanding the distribution and occurrence rate of small planets was a fundamental goal of the Kepler transiting exoplanet mission, and could be improved with K2 and TESS. Deriving accurate exoplanetary radii requires accurate measurements of the host star radii and the planetary transit depths, including accounting for any \"third light\" in the system due to nearby bound companions or background stars. High-resolution imaging of Kepler and K2 planet candidate hosts to detect very close (within ~0.5\") background or bound stellar companions has been crucial for both confirming the planetary n"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.10170","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":"2026-05-17T23:58:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cwdFF3YhtwxYWSHz3WYEqFG6/2gAtRmNZKycPnW59XBS/ick4LIOT4JI9POFhfE1WZYJ1W+S3qXo85jzey9WCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T21:54:04.992698Z"},"content_sha256":"adc523c6dcf97f86fa0365768e4474b007c58f884a5f1f22196c6d93b432c9e1","schema_version":"1.0","event_id":"sha256:adc523c6dcf97f86fa0365768e4474b007c58f884a5f1f22196c6d93b432c9e1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QWS2KIJPU3GA2O63NRHSSC2XF5/bundle.json","state_url":"https://pith.science/pith/QWS2KIJPU3GA2O63NRHSSC2XF5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QWS2KIJPU3GA2O63NRHSSC2XF5/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":"2026-05-31T21:54:04Z","links":{"resolver":"https://pith.science/pith/QWS2KIJPU3GA2O63NRHSSC2XF5","bundle":"https://pith.science/pith/QWS2KIJPU3GA2O63NRHSSC2XF5/bundle.json","state":"https://pith.science/pith/QWS2KIJPU3GA2O63NRHSSC2XF5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QWS2KIJPU3GA2O63NRHSSC2XF5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:QWS2KIJPU3GA2O63NRHSSC2XF5","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":"074f62bd4bbb30caf0730ed26abba5d275d23419af08aed87e729262f35bd4be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-04-26T16:56:37Z","title_canon_sha256":"643f0aae4210a97017cc0aceeec9de293ba2a36a1e3770daab4f2579af2acabb"},"schema_version":"1.0","source":{"id":"1804.10170","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.10170","created_at":"2026-05-17T23:58:41Z"},{"alias_kind":"arxiv_version","alias_value":"1804.10170v2","created_at":"2026-05-17T23:58:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.10170","created_at":"2026-05-17T23:58:41Z"},{"alias_kind":"pith_short_12","alias_value":"QWS2KIJPU3GA","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"QWS2KIJPU3GA2O63","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"QWS2KIJP","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:adc523c6dcf97f86fa0365768e4474b007c58f884a5f1f22196c6d93b432c9e1","target":"graph","created_at":"2026-05-17T23:58:41Z","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":"Understanding the distribution and occurrence rate of small planets was a fundamental goal of the Kepler transiting exoplanet mission, and could be improved with K2 and TESS. Deriving accurate exoplanetary radii requires accurate measurements of the host star radii and the planetary transit depths, including accounting for any \"third light\" in the system due to nearby bound companions or background stars. High-resolution imaging of Kepler and K2 planet candidate hosts to detect very close (within ~0.5\") background or bound stellar companions has been crucial for both confirming the planetary n","authors_text":"David R. Ciardi, Johanna K. Teske, Lea A. Hirsch, Rachel A. Johnson, Steve B. Howell","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-04-26T16:56:37Z","title":"The Effects of Stellar Companions on Exoplanet Radius Distributions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.10170","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":"sha256:66ead7aa7559981d4388b4154be5ce4bb876f10ae98e9e64f8e87d50ed8e8dbe","target":"record","created_at":"2026-05-17T23:58:41Z","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":"074f62bd4bbb30caf0730ed26abba5d275d23419af08aed87e729262f35bd4be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-04-26T16:56:37Z","title_canon_sha256":"643f0aae4210a97017cc0aceeec9de293ba2a36a1e3770daab4f2579af2acabb"},"schema_version":"1.0","source":{"id":"1804.10170","kind":"arxiv","version":2}},"canonical_sha256":"85a5a5212fa6cc0d3bdb6c4f290b572f71f11d44f4e8789f0423c198dc554265","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"85a5a5212fa6cc0d3bdb6c4f290b572f71f11d44f4e8789f0423c198dc554265","first_computed_at":"2026-05-17T23:58:41.602527Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:41.602527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uzgZykTS/IsgyqQfaNP7oL4egam9Br6sTwWVkYDrK1gcazYWCZSMp+4iGJbyTIyO5VReuHjpuhY48hX7pdWVDg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:41.603094Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.10170","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:66ead7aa7559981d4388b4154be5ce4bb876f10ae98e9e64f8e87d50ed8e8dbe","sha256:adc523c6dcf97f86fa0365768e4474b007c58f884a5f1f22196c6d93b432c9e1"],"state_sha256":"2f97911c1735ba184a0a6339c4718035e9dce6e14ae786400701b1a21bd316c4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0LaAzaJQAecDrQyDKpZBnH9cNptwOi0gl9PPNCtq1c2vKN6wFHBhvXMP1X02eM9KHE19QB3eCtNa33PiQF5zCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T21:54:04.995252Z","bundle_sha256":"fa99e13bc1e8dccad18fd15410a264c41943e24a71c3b30a0b88eb3e941a0b07"}}