{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:6EFCQNM3QJUHC2LEL3SXIMHDZI","short_pith_number":"pith:6EFCQNM3","canonical_record":{"source":{"id":"1802.06805","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-19T19:00:43Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"7ef06e7cf5d6c799f115f5deb677baf1d0e15fcbd07d02b3a3f5580c451d8046","abstract_canon_sha256":"66615b95f302d6493b1ec1f1cc47818fba74532c5b81859d1f705d6a4a00aee3"},"schema_version":"1.0"},"canonical_sha256":"f10a28359b82687169645ee57430e3ca3887a2a351592b71148f737ed5933679","source":{"kind":"arxiv","id":"1802.06805","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.06805","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"arxiv_version","alias_value":"1802.06805v1","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.06805","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"pith_short_12","alias_value":"6EFCQNM3QJUH","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"6EFCQNM3QJUHC2LE","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"6EFCQNM3","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:6EFCQNM3QJUHC2LEL3SXIMHDZI","target":"record","payload":{"canonical_record":{"source":{"id":"1802.06805","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-19T19:00:43Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"7ef06e7cf5d6c799f115f5deb677baf1d0e15fcbd07d02b3a3f5580c451d8046","abstract_canon_sha256":"66615b95f302d6493b1ec1f1cc47818fba74532c5b81859d1f705d6a4a00aee3"},"schema_version":"1.0"},"canonical_sha256":"f10a28359b82687169645ee57430e3ca3887a2a351592b71148f737ed5933679","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:31.982805Z","signature_b64":"LZJrFz/X5w1Pe3NVjuJn96Pk3fXd6L0y4JMTaT/dEzQAyrX1CUc2hF9DDrnmIkIuntsRWMb35IBCPVhIkSLSCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f10a28359b82687169645ee57430e3ca3887a2a351592b71148f737ed5933679","last_reissued_at":"2026-05-18T00:05:31.982344Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:31.982344Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.06805","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":"2026-05-18T00:05:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tdgF03n81yi9kd7WLR6ALqFA1q4FNJxeS/3P2OmFDuw7yfLEthPN1NTFryPNl6dCbTTv00oI3v+dI9StXhi4BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T23:35:40.176548Z"},"content_sha256":"c31ba30bbf941682241f56526c824eff434975c9f26b44eb0bb487badc5e934b","schema_version":"1.0","event_id":"sha256:c31ba30bbf941682241f56526c824eff434975c9f26b44eb0bb487badc5e934b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:6EFCQNM3QJUHC2LEL3SXIMHDZI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"exocartographer: A Bayesian Framework for Mapping Exoplanets in Reflected Light","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.EP","authors_text":"Ben Farr, Hal M. Haggard, Nicolas B. Cowan, Tyler Robinson, Will M. Farr","submitted_at":"2018-02-19T19:00:43Z","abstract_excerpt":"Future space telescopes will directly image extrasolar planets at visible wavelengths. Time-resolved reflected light from an exoplanet encodes information about atmospheric and surface inhomogeneities. Previous research has shown that the light curve of an exoplanet can be inverted to obtain a low-resolution map of the planet, as well as constraints on its spin orientation. Estimating the uncertainty on 2D albedo maps has so far remained elusive. Here we present exocartographer, a flexible open-source Bayesian framework for solving the exo-cartography inverse problem. The map is parameterized "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.06805","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":"2026-05-18T00:05:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yVZqrw95nwMtBYnc++HwdwnlZ8bBjGwp5KgHwZntZt0NM6MJFvIv40uRMqyJrfdmArIFDxmBychmStOoNvHiAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T23:35:40.177293Z"},"content_sha256":"17ae57f1549a36c75e4d01d1ce1bf418bccf3ac34305ad20551a93c2083b452f","schema_version":"1.0","event_id":"sha256:17ae57f1549a36c75e4d01d1ce1bf418bccf3ac34305ad20551a93c2083b452f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6EFCQNM3QJUHC2LEL3SXIMHDZI/bundle.json","state_url":"https://pith.science/pith/6EFCQNM3QJUHC2LEL3SXIMHDZI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6EFCQNM3QJUHC2LEL3SXIMHDZI/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":"2026-05-20T23:35:40Z","links":{"resolver":"https://pith.science/pith/6EFCQNM3QJUHC2LEL3SXIMHDZI","bundle":"https://pith.science/pith/6EFCQNM3QJUHC2LEL3SXIMHDZI/bundle.json","state":"https://pith.science/pith/6EFCQNM3QJUHC2LEL3SXIMHDZI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6EFCQNM3QJUHC2LEL3SXIMHDZI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:6EFCQNM3QJUHC2LEL3SXIMHDZI","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":"66615b95f302d6493b1ec1f1cc47818fba74532c5b81859d1f705d6a4a00aee3","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-19T19:00:43Z","title_canon_sha256":"7ef06e7cf5d6c799f115f5deb677baf1d0e15fcbd07d02b3a3f5580c451d8046"},"schema_version":"1.0","source":{"id":"1802.06805","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.06805","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"arxiv_version","alias_value":"1802.06805v1","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.06805","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"pith_short_12","alias_value":"6EFCQNM3QJUH","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"6EFCQNM3QJUHC2LE","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"6EFCQNM3","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:17ae57f1549a36c75e4d01d1ce1bf418bccf3ac34305ad20551a93c2083b452f","target":"graph","created_at":"2026-05-18T00:05:31Z","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":"Future space telescopes will directly image extrasolar planets at visible wavelengths. Time-resolved reflected light from an exoplanet encodes information about atmospheric and surface inhomogeneities. Previous research has shown that the light curve of an exoplanet can be inverted to obtain a low-resolution map of the planet, as well as constraints on its spin orientation. Estimating the uncertainty on 2D albedo maps has so far remained elusive. Here we present exocartographer, a flexible open-source Bayesian framework for solving the exo-cartography inverse problem. The map is parameterized ","authors_text":"Ben Farr, Hal M. Haggard, Nicolas B. Cowan, Tyler Robinson, Will M. Farr","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-19T19:00:43Z","title":"exocartographer: A Bayesian Framework for Mapping Exoplanets in Reflected Light"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.06805","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:c31ba30bbf941682241f56526c824eff434975c9f26b44eb0bb487badc5e934b","target":"record","created_at":"2026-05-18T00:05:31Z","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":"66615b95f302d6493b1ec1f1cc47818fba74532c5b81859d1f705d6a4a00aee3","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-19T19:00:43Z","title_canon_sha256":"7ef06e7cf5d6c799f115f5deb677baf1d0e15fcbd07d02b3a3f5580c451d8046"},"schema_version":"1.0","source":{"id":"1802.06805","kind":"arxiv","version":1}},"canonical_sha256":"f10a28359b82687169645ee57430e3ca3887a2a351592b71148f737ed5933679","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f10a28359b82687169645ee57430e3ca3887a2a351592b71148f737ed5933679","first_computed_at":"2026-05-18T00:05:31.982344Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:31.982344Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LZJrFz/X5w1Pe3NVjuJn96Pk3fXd6L0y4JMTaT/dEzQAyrX1CUc2hF9DDrnmIkIuntsRWMb35IBCPVhIkSLSCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:31.982805Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.06805","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c31ba30bbf941682241f56526c824eff434975c9f26b44eb0bb487badc5e934b","sha256:17ae57f1549a36c75e4d01d1ce1bf418bccf3ac34305ad20551a93c2083b452f"],"state_sha256":"7e69845cfd57ce266d4ded5a75d3292e0b974a72ada3d78a4426f36b1bbaa98c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LYaExB6bLNimyxUJd3zHOB9vnKLgr+7sJ+LACUJ6IJ5yAnTiTDBuWmOs4Fc4KfbyRou37fP4fU5K56qRg6xOCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T23:35:40.181102Z","bundle_sha256":"c9661604d49ffaf37e25d5cd8948905585fb8eaa888fc9ff7583603659216385"}}