{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:KLZMVT3WJR5AVW4JVEXQBGY7LV","short_pith_number":"pith:KLZMVT3W","canonical_record":{"source":{"id":"1404.5337","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-04-21T21:23:20Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"5b355db20b2e52da12ecc83d9270c14bbb2a83ee7c43a3663ce34f9ce11353a2","abstract_canon_sha256":"66d7429a0ca834fb0133be4c1b498bee7c3dd220f85ce4c06213c2b0c72d360b"},"schema_version":"1.0"},"canonical_sha256":"52f2cacf764c7a0adb89a92f009b1f5d4ce5ed2f257bea13358909f273fe2044","source":{"kind":"arxiv","id":"1404.5337","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.5337","created_at":"2026-05-18T02:41:53Z"},{"alias_kind":"arxiv_version","alias_value":"1404.5337v2","created_at":"2026-05-18T02:41:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.5337","created_at":"2026-05-18T02:41:53Z"},{"alias_kind":"pith_short_12","alias_value":"KLZMVT3WJR5A","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"KLZMVT3WJR5AVW4J","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"KLZMVT3W","created_at":"2026-05-18T12:28:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:KLZMVT3WJR5AVW4JVEXQBGY7LV","target":"record","payload":{"canonical_record":{"source":{"id":"1404.5337","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-04-21T21:23:20Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"5b355db20b2e52da12ecc83d9270c14bbb2a83ee7c43a3663ce34f9ce11353a2","abstract_canon_sha256":"66d7429a0ca834fb0133be4c1b498bee7c3dd220f85ce4c06213c2b0c72d360b"},"schema_version":"1.0"},"canonical_sha256":"52f2cacf764c7a0adb89a92f009b1f5d4ce5ed2f257bea13358909f273fe2044","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:41:53.135700Z","signature_b64":"gJrMogb98ngSBTS/axTWYXWROw7oqQSGdXAIsKBYmT29gL/TyOYhUgwjl80l99wyVPODiJ7g0+L0ZeAEZi9JAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"52f2cacf764c7a0adb89a92f009b1f5d4ce5ed2f257bea13358909f273fe2044","last_reissued_at":"2026-05-18T02:41:53.135126Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:41:53.135126Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.5337","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":"2026-05-18T02:41:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"khq9dDDix0Ohm2JGwz20zMZUp1/un07dsQaYJ1rEQiXkjSA4amsT3LliBnYjVMwburtPziOyc1vTP1jMlk7QCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T19:17:57.441024Z"},"content_sha256":"30f49558b9c879900719155e9f8c1954d459ebab6b025744e8f539303a57c2b2","schema_version":"1.0","event_id":"sha256:30f49558b9c879900719155e9f8c1954d459ebab6b025744e8f539303a57c2b2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:KLZMVT3WJR5AVW4JVEXQBGY7LV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Prospects for Detecting Oxygen, Water, and Chlorophyll on an Exo-Earth","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.EP","authors_text":"David S. Spiegel, Timothy D. Brandt","submitted_at":"2014-04-21T21:23:20Z","abstract_excerpt":"The goal of finding and characterizing nearby Earth-like planets is driving many NASA high-contrast flagship mission concepts, the latest of which is known as the Advanced Technology Large-Aperture Space Telescope (ATLAST). In this article, we calculate the optimal spectral resolution $R=\\lambda/\\delta\\lambda$ and minimum signal-to-noise ratio per spectral bin (SNR), two central design requirements for a high-contrast space mission, in order to detect signatures of water, oxygen, and chlorophyll on an Earth twin. We first develop a minimally parametric model and demonstrate its ability to fit "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.5337","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":"2026-05-18T02:41:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LA/oojlRRX6PtWQboVucN1PvBsU622sdFap55cxLSojzp0Qg8vsCjAdaZvjakPmNeR/qk2RWrreid0776en3Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T19:17:57.441380Z"},"content_sha256":"5f51d99d9093beba8c0ba73f3d26a4177a73e35fc4b7c693b8f2869d7165fde0","schema_version":"1.0","event_id":"sha256:5f51d99d9093beba8c0ba73f3d26a4177a73e35fc4b7c693b8f2869d7165fde0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KLZMVT3WJR5AVW4JVEXQBGY7LV/bundle.json","state_url":"https://pith.science/pith/KLZMVT3WJR5AVW4JVEXQBGY7LV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KLZMVT3WJR5AVW4JVEXQBGY7LV/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":"2026-06-01T19:17:57Z","links":{"resolver":"https://pith.science/pith/KLZMVT3WJR5AVW4JVEXQBGY7LV","bundle":"https://pith.science/pith/KLZMVT3WJR5AVW4JVEXQBGY7LV/bundle.json","state":"https://pith.science/pith/KLZMVT3WJR5AVW4JVEXQBGY7LV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KLZMVT3WJR5AVW4JVEXQBGY7LV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:KLZMVT3WJR5AVW4JVEXQBGY7LV","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":"66d7429a0ca834fb0133be4c1b498bee7c3dd220f85ce4c06213c2b0c72d360b","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-04-21T21:23:20Z","title_canon_sha256":"5b355db20b2e52da12ecc83d9270c14bbb2a83ee7c43a3663ce34f9ce11353a2"},"schema_version":"1.0","source":{"id":"1404.5337","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.5337","created_at":"2026-05-18T02:41:53Z"},{"alias_kind":"arxiv_version","alias_value":"1404.5337v2","created_at":"2026-05-18T02:41:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.5337","created_at":"2026-05-18T02:41:53Z"},{"alias_kind":"pith_short_12","alias_value":"KLZMVT3WJR5A","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"KLZMVT3WJR5AVW4J","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"KLZMVT3W","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:5f51d99d9093beba8c0ba73f3d26a4177a73e35fc4b7c693b8f2869d7165fde0","target":"graph","created_at":"2026-05-18T02:41:53Z","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":"The goal of finding and characterizing nearby Earth-like planets is driving many NASA high-contrast flagship mission concepts, the latest of which is known as the Advanced Technology Large-Aperture Space Telescope (ATLAST). In this article, we calculate the optimal spectral resolution $R=\\lambda/\\delta\\lambda$ and minimum signal-to-noise ratio per spectral bin (SNR), two central design requirements for a high-contrast space mission, in order to detect signatures of water, oxygen, and chlorophyll on an Earth twin. We first develop a minimally parametric model and demonstrate its ability to fit ","authors_text":"David S. Spiegel, Timothy D. Brandt","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-04-21T21:23:20Z","title":"Prospects for Detecting Oxygen, Water, and Chlorophyll on an Exo-Earth"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.5337","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":"sha256:30f49558b9c879900719155e9f8c1954d459ebab6b025744e8f539303a57c2b2","target":"record","created_at":"2026-05-18T02:41:53Z","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":"66d7429a0ca834fb0133be4c1b498bee7c3dd220f85ce4c06213c2b0c72d360b","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-04-21T21:23:20Z","title_canon_sha256":"5b355db20b2e52da12ecc83d9270c14bbb2a83ee7c43a3663ce34f9ce11353a2"},"schema_version":"1.0","source":{"id":"1404.5337","kind":"arxiv","version":2}},"canonical_sha256":"52f2cacf764c7a0adb89a92f009b1f5d4ce5ed2f257bea13358909f273fe2044","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"52f2cacf764c7a0adb89a92f009b1f5d4ce5ed2f257bea13358909f273fe2044","first_computed_at":"2026-05-18T02:41:53.135126Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:41:53.135126Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gJrMogb98ngSBTS/axTWYXWROw7oqQSGdXAIsKBYmT29gL/TyOYhUgwjl80l99wyVPODiJ7g0+L0ZeAEZi9JAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:41:53.135700Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.5337","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:30f49558b9c879900719155e9f8c1954d459ebab6b025744e8f539303a57c2b2","sha256:5f51d99d9093beba8c0ba73f3d26a4177a73e35fc4b7c693b8f2869d7165fde0"],"state_sha256":"84ef55c6fe590b7e696e69645096c834ea1d411066785e00c6b1fd14c2672405"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CI6LffQBOXQ2558hY43WCBQEoXCi3enceNo4/IJROgO6A489UQ729Actwmq3RSpJvMf1Dt/SH7R6qObDI00PBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T19:17:57.443355Z","bundle_sha256":"be45eccaa5fb31ae338331aef520ff5015323c62c102a44f11879b80a4a51c3a"}}