{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:K25KX3IPKSS4ARJBPGVZGDEM3N","short_pith_number":"pith:K25KX3IP","canonical_record":{"source":{"id":"1904.11504","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-04-25T18:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"50eb55c6bff10e2f7807f5ca1cac01b05087afaa94000535f49b6a76d515f265","abstract_canon_sha256":"546e149d41f966a07b90d678ec6e75f06ac57154ab703482126fdf31bf34e50d"},"schema_version":"1.0"},"canonical_sha256":"56baabed0f54a5c0452179ab930c8cdb58b07fc6d122168526da9c7815335aaa","source":{"kind":"arxiv","id":"1904.11504","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.11504","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"arxiv_version","alias_value":"1904.11504v2","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.11504","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"pith_short_12","alias_value":"K25KX3IPKSS4","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"K25KX3IPKSS4ARJB","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"K25KX3IP","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:K25KX3IPKSS4ARJBPGVZGDEM3N","target":"record","payload":{"canonical_record":{"source":{"id":"1904.11504","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-04-25T18:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"50eb55c6bff10e2f7807f5ca1cac01b05087afaa94000535f49b6a76d515f265","abstract_canon_sha256":"546e149d41f966a07b90d678ec6e75f06ac57154ab703482126fdf31bf34e50d"},"schema_version":"1.0"},"canonical_sha256":"56baabed0f54a5c0452179ab930c8cdb58b07fc6d122168526da9c7815335aaa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:03.548057Z","signature_b64":"i+Lkr0OF3w20oaXH8yfF2SOJMdqUSG+AwCv1wtopKvNa6MjYFipszrS9l2CsvnkybqQuB20xQFp+dyLu0yyvDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"56baabed0f54a5c0452179ab930c8cdb58b07fc6d122168526da9c7815335aaa","last_reissued_at":"2026-05-17T23:40:03.547573Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:03.547573Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.11504","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":"2026-05-17T23:40:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ro5FVwnH3bxUfl9US4NqOVoqAwQCBPEZ/pllyWTijCOWuZjxMcgUsFU1WzxIw4IIoTFqa3UTGQhHZbCT0gpAAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T21:25:13.399300Z"},"content_sha256":"776acbf8c7697689f8b542a4d0340adc97c62aa9b98ea47eb21b635122fc78d5","schema_version":"1.0","event_id":"sha256:776acbf8c7697689f8b542a4d0340adc97c62aa9b98ea47eb21b635122fc78d5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:K25KX3IPKSS4ARJBPGVZGDEM3N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"petitRADTRANS: a Python radiative transfer package for exoplanet characterization and retrieval","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"I. A. G. Snellen, J.P. Wardenier, K. Molaverdikhani, P. Molli\\`ere, R. van Boekel, Th. Henning","submitted_at":"2019-04-25T18:00:02Z","abstract_excerpt":"We present the easy-to-use, publicly available, Python package petitRADTRANS, built for the spectral characterization of exoplanet atmospheres. The code is fast, accurate, and versatile; it can calculate both transmission and emission spectra within a few seconds at low resolution ($\\lambda/\\Delta\\lambda$ = 1000; correlated-k method) and high resolution ($\\lambda/\\Delta\\lambda = 10^6$; line-by-line method), using only a few lines of input instruction. The somewhat slower correlated-k method is used at low resolution because it is more accurate than methods such as opacity sampling. Clouds can "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.11504","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":"2026-05-17T23:40:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vazq0oNoVbAMVMeSboXv8xWVyWl/MfgeNJ2mQEtcuhhnqIrf+Cta4oWYfDg/HEbPiS57ynSYyxdwNzDEk5kKBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T21:25:13.399969Z"},"content_sha256":"e72d7b46ba54fe968ae9072d8fb8d11871faae14e79336992300e18103b90a53","schema_version":"1.0","event_id":"sha256:e72d7b46ba54fe968ae9072d8fb8d11871faae14e79336992300e18103b90a53"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K25KX3IPKSS4ARJBPGVZGDEM3N/bundle.json","state_url":"https://pith.science/pith/K25KX3IPKSS4ARJBPGVZGDEM3N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K25KX3IPKSS4ARJBPGVZGDEM3N/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":"2026-05-20T21:25:13Z","links":{"resolver":"https://pith.science/pith/K25KX3IPKSS4ARJBPGVZGDEM3N","bundle":"https://pith.science/pith/K25KX3IPKSS4ARJBPGVZGDEM3N/bundle.json","state":"https://pith.science/pith/K25KX3IPKSS4ARJBPGVZGDEM3N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K25KX3IPKSS4ARJBPGVZGDEM3N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:K25KX3IPKSS4ARJBPGVZGDEM3N","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":"546e149d41f966a07b90d678ec6e75f06ac57154ab703482126fdf31bf34e50d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-04-25T18:00:02Z","title_canon_sha256":"50eb55c6bff10e2f7807f5ca1cac01b05087afaa94000535f49b6a76d515f265"},"schema_version":"1.0","source":{"id":"1904.11504","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.11504","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"arxiv_version","alias_value":"1904.11504v2","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.11504","created_at":"2026-05-17T23:40:03Z"},{"alias_kind":"pith_short_12","alias_value":"K25KX3IPKSS4","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"K25KX3IPKSS4ARJB","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"K25KX3IP","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:e72d7b46ba54fe968ae9072d8fb8d11871faae14e79336992300e18103b90a53","target":"graph","created_at":"2026-05-17T23:40:03Z","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":"We present the easy-to-use, publicly available, Python package petitRADTRANS, built for the spectral characterization of exoplanet atmospheres. The code is fast, accurate, and versatile; it can calculate both transmission and emission spectra within a few seconds at low resolution ($\\lambda/\\Delta\\lambda$ = 1000; correlated-k method) and high resolution ($\\lambda/\\Delta\\lambda = 10^6$; line-by-line method), using only a few lines of input instruction. The somewhat slower correlated-k method is used at low resolution because it is more accurate than methods such as opacity sampling. Clouds can ","authors_text":"I. A. G. Snellen, J.P. Wardenier, K. Molaverdikhani, P. Molli\\`ere, R. van Boekel, Th. Henning","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-04-25T18:00:02Z","title":"petitRADTRANS: a Python radiative transfer package for exoplanet characterization and retrieval"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.11504","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":"sha256:776acbf8c7697689f8b542a4d0340adc97c62aa9b98ea47eb21b635122fc78d5","target":"record","created_at":"2026-05-17T23:40:03Z","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":"546e149d41f966a07b90d678ec6e75f06ac57154ab703482126fdf31bf34e50d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-04-25T18:00:02Z","title_canon_sha256":"50eb55c6bff10e2f7807f5ca1cac01b05087afaa94000535f49b6a76d515f265"},"schema_version":"1.0","source":{"id":"1904.11504","kind":"arxiv","version":2}},"canonical_sha256":"56baabed0f54a5c0452179ab930c8cdb58b07fc6d122168526da9c7815335aaa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"56baabed0f54a5c0452179ab930c8cdb58b07fc6d122168526da9c7815335aaa","first_computed_at":"2026-05-17T23:40:03.547573Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:03.547573Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i+Lkr0OF3w20oaXH8yfF2SOJMdqUSG+AwCv1wtopKvNa6MjYFipszrS9l2CsvnkybqQuB20xQFp+dyLu0yyvDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:03.548057Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.11504","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:776acbf8c7697689f8b542a4d0340adc97c62aa9b98ea47eb21b635122fc78d5","sha256:e72d7b46ba54fe968ae9072d8fb8d11871faae14e79336992300e18103b90a53"],"state_sha256":"6c0014a2470f3aaf846b7ec351f6eceedde44d8f1829a8d47c1aa9a1cff96e72"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mf8Pj162ofqETDdcZ80Ahfh1Q4yMTLivZIKdIsgaaDBihAqw48nNTjwKtJ61Eekd/RbzuLwUzPoTQ7W+V/igCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T21:25:13.403254Z","bundle_sha256":"175ec47f05bbef77af12080c0d515ebd9b13c4ebfc530b5e931bdee0d2641632"}}