{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:FUMSNOKQR7C46OF7BD7CJVXD7W","short_pith_number":"pith:FUMSNOKQ","canonical_record":{"source":{"id":"2002.08690","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-02-20T11:52:58Z","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"title_canon_sha256":"a5a695d0a365f336b04dde2fe6f39ffb9b5af30b5b2fcb4a93062675ab3d9314","abstract_canon_sha256":"d81f3d00f51c5b6bd60ea7492b630c73a8c5467902d98af6e7c7d19ac4e98ab7"},"schema_version":"1.0"},"canonical_sha256":"2d1926b9508fc5cf38bf08fe24d6e3fdb8ecb6868b804d9b5bd4369cfa5042bd","source":{"kind":"arxiv","id":"2002.08690","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.08690","created_at":"2026-07-05T00:51:41Z"},{"alias_kind":"arxiv_version","alias_value":"2002.08690v1","created_at":"2026-07-05T00:51:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.08690","created_at":"2026-07-05T00:51:41Z"},{"alias_kind":"pith_short_12","alias_value":"FUMSNOKQR7C4","created_at":"2026-07-05T00:51:41Z"},{"alias_kind":"pith_short_16","alias_value":"FUMSNOKQR7C46OF7","created_at":"2026-07-05T00:51:41Z"},{"alias_kind":"pith_short_8","alias_value":"FUMSNOKQ","created_at":"2026-07-05T00:51:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:FUMSNOKQR7C46OF7BD7CJVXD7W","target":"record","payload":{"canonical_record":{"source":{"id":"2002.08690","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-02-20T11:52:58Z","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"title_canon_sha256":"a5a695d0a365f336b04dde2fe6f39ffb9b5af30b5b2fcb4a93062675ab3d9314","abstract_canon_sha256":"d81f3d00f51c5b6bd60ea7492b630c73a8c5467902d98af6e7c7d19ac4e98ab7"},"schema_version":"1.0"},"canonical_sha256":"2d1926b9508fc5cf38bf08fe24d6e3fdb8ecb6868b804d9b5bd4369cfa5042bd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:51:41.388474Z","signature_b64":"Toiv+xEjZap+0vhMRHILxb0tJvQ4sFckdn2GTQOvHQd/yiKJv7QREugWkGpfZFkLZzilAlj3hke22A2o0vFFDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2d1926b9508fc5cf38bf08fe24d6e3fdb8ecb6868b804d9b5bd4369cfa5042bd","last_reissued_at":"2026-07-05T00:51:41.387941Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:51:41.387941Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.08690","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":"2026-07-05T00:51:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w68aKXc59ACxHxhwdwgEbNTNL9nYkLhBus8MleyylLGJvVfqhYiFFkv17XPHxvum4CmRa59rSb8LLU4c0R4UDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T13:51:09.443743Z"},"content_sha256":"99f78d3cdbcb6dc9f35cba58e544a3b35d2c78ed48a8dbfbf408144509f9f7a4","schema_version":"1.0","event_id":"sha256:99f78d3cdbcb6dc9f35cba58e544a3b35d2c78ed48a8dbfbf408144509f9f7a4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:FUMSNOKQR7C46OF7BD7CJVXD7W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-resolution spectroscopy and spectropolarimetry of the total lunar eclipse January 2019","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"A. J\\\"arvinen, E. Keles, F. Mackebrandt, I. Ilyin, J. M. Hill, K. G. Strassmeier, M. Mallonn, M. Weber","submitted_at":"2020-02-20T11:52:58Z","abstract_excerpt":"Observations of the Earthshine off the Moon allow for the unique opportunity to measure the large-scale Earth atmosphere. Another opportunity is realized during a total lunar eclipse which, if seen from the Moon, is like a transit of the Earth in front of the Sun. We thus aim at transmission spectroscopy of an Earth transit by tracing the solar spectrum during the total lunar eclipse of January 21, 2019. Time series spectra of the Tycho crater were taken with the Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in its polarimetric mode in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.08690","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2002.08690/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:51:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QqEHMf9eKPcq72xw2lCsa/CmOKyYuX/3Q9AUL/lv73DssGy4uK4dVDAsImTYY6rHl8f/edg7wGQsORG/0hzECA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T13:51:09.444574Z"},"content_sha256":"90fcc43ccc32b9d02a0233a5e73788ef6fb19ceea14b8e45515c9ae39ec93e98","schema_version":"1.0","event_id":"sha256:90fcc43ccc32b9d02a0233a5e73788ef6fb19ceea14b8e45515c9ae39ec93e98"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FUMSNOKQR7C46OF7BD7CJVXD7W/bundle.json","state_url":"https://pith.science/pith/FUMSNOKQR7C46OF7BD7CJVXD7W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FUMSNOKQR7C46OF7BD7CJVXD7W/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":"2026-08-04T13:51:09Z","links":{"resolver":"https://pith.science/pith/FUMSNOKQR7C46OF7BD7CJVXD7W","bundle":"https://pith.science/pith/FUMSNOKQR7C46OF7BD7CJVXD7W/bundle.json","state":"https://pith.science/pith/FUMSNOKQR7C46OF7BD7CJVXD7W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FUMSNOKQR7C46OF7BD7CJVXD7W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:FUMSNOKQR7C46OF7BD7CJVXD7W","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":"d81f3d00f51c5b6bd60ea7492b630c73a8c5467902d98af6e7c7d19ac4e98ab7","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-02-20T11:52:58Z","title_canon_sha256":"a5a695d0a365f336b04dde2fe6f39ffb9b5af30b5b2fcb4a93062675ab3d9314"},"schema_version":"1.0","source":{"id":"2002.08690","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.08690","created_at":"2026-07-05T00:51:41Z"},{"alias_kind":"arxiv_version","alias_value":"2002.08690v1","created_at":"2026-07-05T00:51:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.08690","created_at":"2026-07-05T00:51:41Z"},{"alias_kind":"pith_short_12","alias_value":"FUMSNOKQR7C4","created_at":"2026-07-05T00:51:41Z"},{"alias_kind":"pith_short_16","alias_value":"FUMSNOKQR7C46OF7","created_at":"2026-07-05T00:51:41Z"},{"alias_kind":"pith_short_8","alias_value":"FUMSNOKQ","created_at":"2026-07-05T00:51:41Z"}],"graph_snapshots":[{"event_id":"sha256:90fcc43ccc32b9d02a0233a5e73788ef6fb19ceea14b8e45515c9ae39ec93e98","target":"graph","created_at":"2026-07-05T00:51:41Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2002.08690/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Observations of the Earthshine off the Moon allow for the unique opportunity to measure the large-scale Earth atmosphere. Another opportunity is realized during a total lunar eclipse which, if seen from the Moon, is like a transit of the Earth in front of the Sun. We thus aim at transmission spectroscopy of an Earth transit by tracing the solar spectrum during the total lunar eclipse of January 21, 2019. Time series spectra of the Tycho crater were taken with the Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in its polarimetric mode in","authors_text":"A. J\\\"arvinen, E. Keles, F. Mackebrandt, I. Ilyin, J. M. Hill, K. G. Strassmeier, M. Mallonn, M. Weber","cross_cats":["astro-ph.IM","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-02-20T11:52:58Z","title":"High-resolution spectroscopy and spectropolarimetry of the total lunar eclipse January 2019"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.08690","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":"sha256:99f78d3cdbcb6dc9f35cba58e544a3b35d2c78ed48a8dbfbf408144509f9f7a4","target":"record","created_at":"2026-07-05T00:51:41Z","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":"d81f3d00f51c5b6bd60ea7492b630c73a8c5467902d98af6e7c7d19ac4e98ab7","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-02-20T11:52:58Z","title_canon_sha256":"a5a695d0a365f336b04dde2fe6f39ffb9b5af30b5b2fcb4a93062675ab3d9314"},"schema_version":"1.0","source":{"id":"2002.08690","kind":"arxiv","version":1}},"canonical_sha256":"2d1926b9508fc5cf38bf08fe24d6e3fdb8ecb6868b804d9b5bd4369cfa5042bd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2d1926b9508fc5cf38bf08fe24d6e3fdb8ecb6868b804d9b5bd4369cfa5042bd","first_computed_at":"2026-07-05T00:51:41.387941Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:51:41.387941Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Toiv+xEjZap+0vhMRHILxb0tJvQ4sFckdn2GTQOvHQd/yiKJv7QREugWkGpfZFkLZzilAlj3hke22A2o0vFFDg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:51:41.388474Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.08690","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:99f78d3cdbcb6dc9f35cba58e544a3b35d2c78ed48a8dbfbf408144509f9f7a4","sha256:90fcc43ccc32b9d02a0233a5e73788ef6fb19ceea14b8e45515c9ae39ec93e98"],"state_sha256":"264477db80a25f7d64f4525e7453dca5ea93c986fd47bc621818e9b4734c460f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0kdDeQ6WKr1aHds+feZ3cf/kqgZ7uVGdlN4/e5jhIrtjT4Uz356QTXsP2ykkDzDgnEwKXL6+fOSrPNzYPN/ACA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T13:51:09.453319Z","bundle_sha256":"3e1a011e2c6745d2b6107965d1c99875e4b799f72ec6aab4c81933f6ab2ebad8"}}