{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:ODM7QQ7QIEEIOYJ7P5K2POH4YC","short_pith_number":"pith:ODM7QQ7Q","canonical_record":{"source":{"id":"2105.05281","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-05-11T18:27:20Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"4ef8d69b0415c7605a771a70ae2421f574f86cb184bd6e3abed125eff5179d65","abstract_canon_sha256":"ab65f7499c89afb0b17dc8967f06aacaa454e7559e9dc9b76fe024f842a0bed2"},"schema_version":"1.0"},"canonical_sha256":"70d9f843f0410887613f7f55a7b8fcc09184b36cf0c45de56368067945c87f38","source":{"kind":"arxiv","id":"2105.05281","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.05281","created_at":"2026-07-05T02:39:49Z"},{"alias_kind":"arxiv_version","alias_value":"2105.05281v1","created_at":"2026-07-05T02:39:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.05281","created_at":"2026-07-05T02:39:49Z"},{"alias_kind":"pith_short_12","alias_value":"ODM7QQ7QIEEI","created_at":"2026-07-05T02:39:49Z"},{"alias_kind":"pith_short_16","alias_value":"ODM7QQ7QIEEIOYJ7","created_at":"2026-07-05T02:39:49Z"},{"alias_kind":"pith_short_8","alias_value":"ODM7QQ7Q","created_at":"2026-07-05T02:39:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:ODM7QQ7QIEEIOYJ7P5K2POH4YC","target":"record","payload":{"canonical_record":{"source":{"id":"2105.05281","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-05-11T18:27:20Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"4ef8d69b0415c7605a771a70ae2421f574f86cb184bd6e3abed125eff5179d65","abstract_canon_sha256":"ab65f7499c89afb0b17dc8967f06aacaa454e7559e9dc9b76fe024f842a0bed2"},"schema_version":"1.0"},"canonical_sha256":"70d9f843f0410887613f7f55a7b8fcc09184b36cf0c45de56368067945c87f38","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:39:49.401758Z","signature_b64":"YhysJrNITnwGiHxXnkWYCzY//Zi4nLbaeRV3qk2vvpdrtPzxEXPaf44QP2pyeo3QcUZlBVwhI34YaSuKWkK4DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"70d9f843f0410887613f7f55a7b8fcc09184b36cf0c45de56368067945c87f38","last_reissued_at":"2026-07-05T02:39:49.401297Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:39:49.401297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.05281","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":"2026-07-05T02:39:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pbYeM5A96EzGMvKQ10/xvrZEG1XgSeO1Dv54kQoZtXOCPv1aW0qDvluF9ZO3Pxlm6cvx+ySTy3z0q1TfOWpsAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T21:26:32.492502Z"},"content_sha256":"f34c1e1396ec7367a3f50b24f75cab311f4bf9568b08d12eff7abd2fc5e3292b","schema_version":"1.0","event_id":"sha256:f34c1e1396ec7367a3f50b24f75cab311f4bf9568b08d12eff7abd2fc5e3292b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:ODM7QQ7QIEEIOYJ7P5K2POH4YC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mars Astrobiological Cave and Internal habitability Explorer (MACIE): A New Frontiers Mission Concept","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.IM","authors_text":"Akos Kereszturi, Alberto Fairen, Ali Agha-Mohammadi, Anshuman Bhardwaj, Cansu Demirel-Floyd, Charity M. Phillips-Lander, Danielle Wyrick, David Flannery, Javier Martin-Torres, Jen Blank, J. J. Wynne, Kaj Williams, Karl Mitchell, Kurt Retherford, Kyle Uckert, Lydia Sam, Nancy Chanover, Nicole Bardebelias, Penelope Boston, Roger Weins, Saugata Datta, Svetlana Shkolyar, Timothy N. Titus","submitted_at":"2021-05-11T18:27:20Z","abstract_excerpt":"Martian subsurface habitability and astrobiology can be evaluated via a lava tube cave, without drilling. MACIE addresses two key goals of the Decadal Survey (2013-2022) and three MEPAG goals. New advances in robotic architectures, autonomous navigation, target sample selection, and analysis will enable MACIE to explore the Martian subsurface."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.05281","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/2105.05281/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":"2026-07-05T02:39:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d1kvAk8OR0viH0aixFH71tTlYiRsVePlwVUVwNg8xIDbMvTfOi70ZMgVyVTHAI3lJdtkX7n8Aw6AWTf7ImosAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T21:26:32.493131Z"},"content_sha256":"9d6a88008fa894f404e491d6081ca563662b49ed499bd22a5a9ff237ecb44688","schema_version":"1.0","event_id":"sha256:9d6a88008fa894f404e491d6081ca563662b49ed499bd22a5a9ff237ecb44688"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ODM7QQ7QIEEIOYJ7P5K2POH4YC/bundle.json","state_url":"https://pith.science/pith/ODM7QQ7QIEEIOYJ7P5K2POH4YC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ODM7QQ7QIEEIOYJ7P5K2POH4YC/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":"2026-08-22T21:26:32Z","links":{"resolver":"https://pith.science/pith/ODM7QQ7QIEEIOYJ7P5K2POH4YC","bundle":"https://pith.science/pith/ODM7QQ7QIEEIOYJ7P5K2POH4YC/bundle.json","state":"https://pith.science/pith/ODM7QQ7QIEEIOYJ7P5K2POH4YC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ODM7QQ7QIEEIOYJ7P5K2POH4YC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:ODM7QQ7QIEEIOYJ7P5K2POH4YC","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":"ab65f7499c89afb0b17dc8967f06aacaa454e7559e9dc9b76fe024f842a0bed2","cross_cats_sorted":["astro-ph.EP"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-05-11T18:27:20Z","title_canon_sha256":"4ef8d69b0415c7605a771a70ae2421f574f86cb184bd6e3abed125eff5179d65"},"schema_version":"1.0","source":{"id":"2105.05281","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.05281","created_at":"2026-07-05T02:39:49Z"},{"alias_kind":"arxiv_version","alias_value":"2105.05281v1","created_at":"2026-07-05T02:39:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.05281","created_at":"2026-07-05T02:39:49Z"},{"alias_kind":"pith_short_12","alias_value":"ODM7QQ7QIEEI","created_at":"2026-07-05T02:39:49Z"},{"alias_kind":"pith_short_16","alias_value":"ODM7QQ7QIEEIOYJ7","created_at":"2026-07-05T02:39:49Z"},{"alias_kind":"pith_short_8","alias_value":"ODM7QQ7Q","created_at":"2026-07-05T02:39:49Z"}],"graph_snapshots":[{"event_id":"sha256:9d6a88008fa894f404e491d6081ca563662b49ed499bd22a5a9ff237ecb44688","target":"graph","created_at":"2026-07-05T02:39:49Z","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/2105.05281/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Martian subsurface habitability and astrobiology can be evaluated via a lava tube cave, without drilling. MACIE addresses two key goals of the Decadal Survey (2013-2022) and three MEPAG goals. New advances in robotic architectures, autonomous navigation, target sample selection, and analysis will enable MACIE to explore the Martian subsurface.","authors_text":"Akos Kereszturi, Alberto Fairen, Ali Agha-Mohammadi, Anshuman Bhardwaj, Cansu Demirel-Floyd, Charity M. Phillips-Lander, Danielle Wyrick, David Flannery, Javier Martin-Torres, Jen Blank, J. J. Wynne, Kaj Williams, Karl Mitchell, Kurt Retherford, Kyle Uckert, Lydia Sam, Nancy Chanover, Nicole Bardebelias, Penelope Boston, Roger Weins, Saugata Datta, Svetlana Shkolyar, Timothy N. Titus","cross_cats":["astro-ph.EP"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-05-11T18:27:20Z","title":"Mars Astrobiological Cave and Internal habitability Explorer (MACIE): A New Frontiers Mission Concept"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.05281","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:f34c1e1396ec7367a3f50b24f75cab311f4bf9568b08d12eff7abd2fc5e3292b","target":"record","created_at":"2026-07-05T02:39:49Z","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":"ab65f7499c89afb0b17dc8967f06aacaa454e7559e9dc9b76fe024f842a0bed2","cross_cats_sorted":["astro-ph.EP"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-05-11T18:27:20Z","title_canon_sha256":"4ef8d69b0415c7605a771a70ae2421f574f86cb184bd6e3abed125eff5179d65"},"schema_version":"1.0","source":{"id":"2105.05281","kind":"arxiv","version":1}},"canonical_sha256":"70d9f843f0410887613f7f55a7b8fcc09184b36cf0c45de56368067945c87f38","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"70d9f843f0410887613f7f55a7b8fcc09184b36cf0c45de56368067945c87f38","first_computed_at":"2026-07-05T02:39:49.401297Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:39:49.401297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YhysJrNITnwGiHxXnkWYCzY//Zi4nLbaeRV3qk2vvpdrtPzxEXPaf44QP2pyeo3QcUZlBVwhI34YaSuKWkK4DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:39:49.401758Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.05281","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f34c1e1396ec7367a3f50b24f75cab311f4bf9568b08d12eff7abd2fc5e3292b","sha256:9d6a88008fa894f404e491d6081ca563662b49ed499bd22a5a9ff237ecb44688"],"state_sha256":"8539a33a75bcfafd0c8676f740a6b19148eebe6b8ee22983a2a398f20a4de5d2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lm4CrmMfP0XjQAcY9XPofdtCgiAWEP9eIz9lbQ+0/7bcLnhfhY4Mn0HNWuaU4yGKdqfHWTx5ZFHukZgqdS1JDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T21:26:32.498562Z","bundle_sha256":"39d5ba2dd2e7a2b30676e78d71db598a1a4dffae5a0bbfbefb1af4b262db7b70"}}