{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:CHFDXBGU7TABE5F5W7BBH64DN3","short_pith_number":"pith:CHFDXBGU","canonical_record":{"source":{"id":"1808.09632","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-08-29T04:11:04Z","cross_cats_sorted":[],"title_canon_sha256":"2dfb8d5445edf69b9ed0bf1123d1e884a08efd18b4abaf9578c7dd1b8a520042","abstract_canon_sha256":"f6f75f1b05302715318eb330b30eca95178135f5f7aa377cd0065ad7e700bed5"},"schema_version":"1.0"},"canonical_sha256":"11ca3b84d4fcc01274bdb7c213fb836ed2f63a43ae57de6a0dd00370c59f0fcf","source":{"kind":"arxiv","id":"1808.09632","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.09632","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"arxiv_version","alias_value":"1808.09632v1","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09632","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"pith_short_12","alias_value":"CHFDXBGU7TAB","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CHFDXBGU7TABE5F5","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CHFDXBGU","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:CHFDXBGU7TABE5F5W7BBH64DN3","target":"record","payload":{"canonical_record":{"source":{"id":"1808.09632","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-08-29T04:11:04Z","cross_cats_sorted":[],"title_canon_sha256":"2dfb8d5445edf69b9ed0bf1123d1e884a08efd18b4abaf9578c7dd1b8a520042","abstract_canon_sha256":"f6f75f1b05302715318eb330b30eca95178135f5f7aa377cd0065ad7e700bed5"},"schema_version":"1.0"},"canonical_sha256":"11ca3b84d4fcc01274bdb7c213fb836ed2f63a43ae57de6a0dd00370c59f0fcf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:54.958587Z","signature_b64":"X6TVoF0DamovcH3A8cwTGgaCTlgcw87nYW7se2x+YS4JLLlj2Mu8cdijsWCWpoddRHHL6Rp8PkrRA/bMpqghDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"11ca3b84d4fcc01274bdb7c213fb836ed2f63a43ae57de6a0dd00370c59f0fcf","last_reissued_at":"2026-05-18T00:06:54.958117Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:54.958117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.09632","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":"2026-05-18T00:06:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WFVdbSvVbXsZQOe78cMJiMrgJbIbQTPP+tJicXyYBith7mSMNXNctpPjO5lCwhSAUEUBp2XWtEhv2aDQwNoXAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T05:19:43.310946Z"},"content_sha256":"93c083c270d539a120d0653675189c349b623b1c020c9dd9237cedcf0faf3ec1","schema_version":"1.0","event_id":"sha256:93c083c270d539a120d0653675189c349b623b1c020c9dd9237cedcf0faf3ec1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:CHFDXBGU7TABE5F5W7BBH64DN3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct Imaging in Reflected Light: Characterization of Older, Temperate Exoplanets With 30-m Telescopes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Andrew Howard, Benjamin A. Mazin, Christian Marois, Courtney Dressing, Etienne Artigau, Eugene Serabyn, Gautam Vasisht, Ian Crossfield, Jacques-Robert Delorme, Jared R. Males, Jeffrey Chilcote, Ji Wang, J. Kent Wallace, Jonathan Fortney, Julien Lozi, Katie M. Morzinski, Laird Close, Lewis Roberts, Max A. Millar-Blanchaer, Michael P. Fitzgerald, Nemanja Jovanovic, Quinn Konopacky, Rebecca A. Bernstein, Richard Frazin, Timothy Brandt","submitted_at":"2018-08-29T04:11:04Z","abstract_excerpt":"Direct detection, also known as direct imaging, is a method for discovering and characterizing the atmospheres of planets at intermediate and wide separations. It is the only means of obtaining spectra of non-transiting exoplanets. Characterizing the atmospheres of planets in the <5 AU regime, where RV surveys have revealed an abundance of other worlds, requires a 30-m-class aperture in combination with an advanced adaptive optics system, coronagraph, and suite of spectrometers and imagers - this concept underlies planned instruments for both TMT (the Planetary Systems Imager, or PSI) and the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09632","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":"2026-05-18T00:06:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pQRtdFULfxH6RdSAWRZvs8Pv3n6SVVM6jMYrRbUttBPOt/wICslBMAlQJxo8pYcqlfyaXiHpo2sP3P11/Y+xAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T05:19:43.311599Z"},"content_sha256":"a7b7b58bf1da3d4bc1ca08983bae6b5c5d632e2128f71a1a69ed49dc320e6a65","schema_version":"1.0","event_id":"sha256:a7b7b58bf1da3d4bc1ca08983bae6b5c5d632e2128f71a1a69ed49dc320e6a65"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CHFDXBGU7TABE5F5W7BBH64DN3/bundle.json","state_url":"https://pith.science/pith/CHFDXBGU7TABE5F5W7BBH64DN3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CHFDXBGU7TABE5F5W7BBH64DN3/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":"2026-06-01T05:19:43Z","links":{"resolver":"https://pith.science/pith/CHFDXBGU7TABE5F5W7BBH64DN3","bundle":"https://pith.science/pith/CHFDXBGU7TABE5F5W7BBH64DN3/bundle.json","state":"https://pith.science/pith/CHFDXBGU7TABE5F5W7BBH64DN3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CHFDXBGU7TABE5F5W7BBH64DN3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CHFDXBGU7TABE5F5W7BBH64DN3","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":"f6f75f1b05302715318eb330b30eca95178135f5f7aa377cd0065ad7e700bed5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-08-29T04:11:04Z","title_canon_sha256":"2dfb8d5445edf69b9ed0bf1123d1e884a08efd18b4abaf9578c7dd1b8a520042"},"schema_version":"1.0","source":{"id":"1808.09632","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.09632","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"arxiv_version","alias_value":"1808.09632v1","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09632","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"pith_short_12","alias_value":"CHFDXBGU7TAB","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CHFDXBGU7TABE5F5","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CHFDXBGU","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:a7b7b58bf1da3d4bc1ca08983bae6b5c5d632e2128f71a1a69ed49dc320e6a65","target":"graph","created_at":"2026-05-18T00:06:54Z","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":"Direct detection, also known as direct imaging, is a method for discovering and characterizing the atmospheres of planets at intermediate and wide separations. It is the only means of obtaining spectra of non-transiting exoplanets. Characterizing the atmospheres of planets in the <5 AU regime, where RV surveys have revealed an abundance of other worlds, requires a 30-m-class aperture in combination with an advanced adaptive optics system, coronagraph, and suite of spectrometers and imagers - this concept underlies planned instruments for both TMT (the Planetary Systems Imager, or PSI) and the ","authors_text":"Andrew Howard, Benjamin A. Mazin, Christian Marois, Courtney Dressing, Etienne Artigau, Eugene Serabyn, Gautam Vasisht, Ian Crossfield, Jacques-Robert Delorme, Jared R. Males, Jeffrey Chilcote, Ji Wang, J. Kent Wallace, Jonathan Fortney, Julien Lozi, Katie M. Morzinski, Laird Close, Lewis Roberts, Max A. Millar-Blanchaer, Michael P. Fitzgerald, Nemanja Jovanovic, Quinn Konopacky, Rebecca A. Bernstein, Richard Frazin, Timothy Brandt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-08-29T04:11:04Z","title":"Direct Imaging in Reflected Light: Characterization of Older, Temperate Exoplanets With 30-m Telescopes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09632","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":"sha256:93c083c270d539a120d0653675189c349b623b1c020c9dd9237cedcf0faf3ec1","target":"record","created_at":"2026-05-18T00:06:54Z","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":"f6f75f1b05302715318eb330b30eca95178135f5f7aa377cd0065ad7e700bed5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-08-29T04:11:04Z","title_canon_sha256":"2dfb8d5445edf69b9ed0bf1123d1e884a08efd18b4abaf9578c7dd1b8a520042"},"schema_version":"1.0","source":{"id":"1808.09632","kind":"arxiv","version":1}},"canonical_sha256":"11ca3b84d4fcc01274bdb7c213fb836ed2f63a43ae57de6a0dd00370c59f0fcf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"11ca3b84d4fcc01274bdb7c213fb836ed2f63a43ae57de6a0dd00370c59f0fcf","first_computed_at":"2026-05-18T00:06:54.958117Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:54.958117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X6TVoF0DamovcH3A8cwTGgaCTlgcw87nYW7se2x+YS4JLLlj2Mu8cdijsWCWpoddRHHL6Rp8PkrRA/bMpqghDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:54.958587Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.09632","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93c083c270d539a120d0653675189c349b623b1c020c9dd9237cedcf0faf3ec1","sha256:a7b7b58bf1da3d4bc1ca08983bae6b5c5d632e2128f71a1a69ed49dc320e6a65"],"state_sha256":"fa5768410f151ea237406477bab77ddb121ed0398ff4222415624fb87cb0a68f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X3dsNdyY77Syuz4xUCFZnOt/1g7h23jUQcaycWHTmIevHQyhVcQuSU8EtDBu30UpOyC5zKKIJqKWdSmTvE6KBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T05:19:43.314595Z","bundle_sha256":"a342ef47396348d79249ee353a192332f3ec223512ec416522bc9f5abf7e7d59"}}