{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:GJ32VOO3NAIHRB2WKI7WKKHSJD","short_pith_number":"pith:GJ32VOO3","canonical_record":{"source":{"id":"1803.04457","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-03-12T18:54:38Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"65d994c821d34d4750a3d7f08fe813390d218b7856e66a75a04efb98fa577b5f","abstract_canon_sha256":"4e2aec95faefded2d990afd11bd5aeb5167152fc2bc9acdec0eceb8596a1145a"},"schema_version":"1.0"},"canonical_sha256":"3277aab9db6810788756523f6528f248c06d9d78f2a3422d8cee51df3b7442f7","source":{"kind":"arxiv","id":"1803.04457","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.04457","created_at":"2026-05-18T00:21:18Z"},{"alias_kind":"arxiv_version","alias_value":"1803.04457v1","created_at":"2026-05-18T00:21:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.04457","created_at":"2026-05-18T00:21:18Z"},{"alias_kind":"pith_short_12","alias_value":"GJ32VOO3NAIH","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GJ32VOO3NAIHRB2W","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GJ32VOO3","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:GJ32VOO3NAIHRB2WKI7WKKHSJD","target":"record","payload":{"canonical_record":{"source":{"id":"1803.04457","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-03-12T18:54:38Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"65d994c821d34d4750a3d7f08fe813390d218b7856e66a75a04efb98fa577b5f","abstract_canon_sha256":"4e2aec95faefded2d990afd11bd5aeb5167152fc2bc9acdec0eceb8596a1145a"},"schema_version":"1.0"},"canonical_sha256":"3277aab9db6810788756523f6528f248c06d9d78f2a3422d8cee51df3b7442f7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:21:19.001197Z","signature_b64":"Rr4NtZnP49T5Y60nviGh+7S9ziQVrzbhlaiRUtWj8eHH8KGpgA3OPt6XFHcYhgIHPgCwgl5iYCiLDa5ME55JCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3277aab9db6810788756523f6528f248c06d9d78f2a3422d8cee51df3b7442f7","last_reissued_at":"2026-05-18T00:21:18.999041Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:21:18.999041Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.04457","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":"2026-05-18T00:21:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/vF6TzFUWR/DtTdzDV+qYJui5RVfpYQ+6cw8R9aEmSpLC3fOy0B7jiBEmz9ccnzQvQ47avblrjKAEUGwZWlhBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T13:22:57.029267Z"},"content_sha256":"40c26407cd645ccaa432f3714d69c67a5a407a5a70964d856dd3f297c259adac","schema_version":"1.0","event_id":"sha256:40c26407cd645ccaa432f3714d69c67a5a407a5a70964d856dd3f297c259adac"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:GJ32VOO3NAIHRB2WKI7WKKHSJD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Key Technology Challenges for the Study of Exoplanets and the Search for Habitable Worlds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.IM","authors_text":"Brendan Crill, Eric Mamajek, Karl Stapelfeldt, Nick Siegler, Shawn Domagal-Goldman","submitted_at":"2018-03-12T18:54:38Z","abstract_excerpt":"In support of the National Acadamies' Exoplanet Science Strategy, this whitepaper outlines key technology challenges for studying the diversity of worlds in the Galaxy and in searching for habitable planets. Observations of habitable planets outside of our solar system require technologies enabling the measurement of (1) spectral signatures of gases in their atmospheres, some of which may be of biological origin, and (2) planetary mass. Technology gaps must be closed in many areas. In some cases, performance requirements are 1-2 orders of magnitude from the current state-of-the-art. Thes techn"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.04457","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":"2026-05-18T00:21:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qZ/tTWHT95VG6hHJ0T0NcB5fzqU0gWHuSDrUTwUjgqFlTmMi8K+XCbgyD+B1XFUg2oT59i2tlelb6LJYedG5Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T13:22:57.029653Z"},"content_sha256":"aefbe3ca251be2355f82afffdb05e1e79793d8c63b290d875dcd13d2b6d87ff0","schema_version":"1.0","event_id":"sha256:aefbe3ca251be2355f82afffdb05e1e79793d8c63b290d875dcd13d2b6d87ff0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GJ32VOO3NAIHRB2WKI7WKKHSJD/bundle.json","state_url":"https://pith.science/pith/GJ32VOO3NAIHRB2WKI7WKKHSJD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GJ32VOO3NAIHRB2WKI7WKKHSJD/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":"2026-06-11T13:22:57Z","links":{"resolver":"https://pith.science/pith/GJ32VOO3NAIHRB2WKI7WKKHSJD","bundle":"https://pith.science/pith/GJ32VOO3NAIHRB2WKI7WKKHSJD/bundle.json","state":"https://pith.science/pith/GJ32VOO3NAIHRB2WKI7WKKHSJD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GJ32VOO3NAIHRB2WKI7WKKHSJD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GJ32VOO3NAIHRB2WKI7WKKHSJD","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":"4e2aec95faefded2d990afd11bd5aeb5167152fc2bc9acdec0eceb8596a1145a","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-03-12T18:54:38Z","title_canon_sha256":"65d994c821d34d4750a3d7f08fe813390d218b7856e66a75a04efb98fa577b5f"},"schema_version":"1.0","source":{"id":"1803.04457","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.04457","created_at":"2026-05-18T00:21:18Z"},{"alias_kind":"arxiv_version","alias_value":"1803.04457v1","created_at":"2026-05-18T00:21:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.04457","created_at":"2026-05-18T00:21:18Z"},{"alias_kind":"pith_short_12","alias_value":"GJ32VOO3NAIH","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GJ32VOO3NAIHRB2W","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GJ32VOO3","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:aefbe3ca251be2355f82afffdb05e1e79793d8c63b290d875dcd13d2b6d87ff0","target":"graph","created_at":"2026-05-18T00:21:18Z","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":"In support of the National Acadamies' Exoplanet Science Strategy, this whitepaper outlines key technology challenges for studying the diversity of worlds in the Galaxy and in searching for habitable planets. Observations of habitable planets outside of our solar system require technologies enabling the measurement of (1) spectral signatures of gases in their atmospheres, some of which may be of biological origin, and (2) planetary mass. Technology gaps must be closed in many areas. In some cases, performance requirements are 1-2 orders of magnitude from the current state-of-the-art. Thes techn","authors_text":"Brendan Crill, Eric Mamajek, Karl Stapelfeldt, Nick Siegler, Shawn Domagal-Goldman","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-03-12T18:54:38Z","title":"Key Technology Challenges for the Study of Exoplanets and the Search for Habitable Worlds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.04457","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":"sha256:40c26407cd645ccaa432f3714d69c67a5a407a5a70964d856dd3f297c259adac","target":"record","created_at":"2026-05-18T00:21:18Z","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":"4e2aec95faefded2d990afd11bd5aeb5167152fc2bc9acdec0eceb8596a1145a","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-03-12T18:54:38Z","title_canon_sha256":"65d994c821d34d4750a3d7f08fe813390d218b7856e66a75a04efb98fa577b5f"},"schema_version":"1.0","source":{"id":"1803.04457","kind":"arxiv","version":1}},"canonical_sha256":"3277aab9db6810788756523f6528f248c06d9d78f2a3422d8cee51df3b7442f7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3277aab9db6810788756523f6528f248c06d9d78f2a3422d8cee51df3b7442f7","first_computed_at":"2026-05-18T00:21:18.999041Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:18.999041Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Rr4NtZnP49T5Y60nviGh+7S9ziQVrzbhlaiRUtWj8eHH8KGpgA3OPt6XFHcYhgIHPgCwgl5iYCiLDa5ME55JCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:19.001197Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.04457","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:40c26407cd645ccaa432f3714d69c67a5a407a5a70964d856dd3f297c259adac","sha256:aefbe3ca251be2355f82afffdb05e1e79793d8c63b290d875dcd13d2b6d87ff0"],"state_sha256":"5147f6a56fb18a68a33f910774576483e36c8c501da9e57bf4b3b2c8d0ec2044"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MHAaVZD9fUdeEKgIBFqHr7AF4lhytVgiy6i5XTOyZZWXSu8fwhkvykrUzg8vtlmop4wHAuTK1LEO+RS3KcHhDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T13:22:57.031742Z","bundle_sha256":"3a3bc0e90f00d13d7a6d18bf1f83438012b0192b5da49a03b00f75b4eefb81dd"}}