{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:33WCI5WETMQY57VEX4S4DBLRRP","short_pith_number":"pith:33WCI5WE","canonical_record":{"source":{"id":"2507.01441","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-07-02T07:57:54Z","cross_cats_sorted":[],"title_canon_sha256":"5b69e2ba35415843f3fb68e3c6bdb1a5fb296c72879d7b33696db508dbada213","abstract_canon_sha256":"ce26362151f9b2b5a94d3b3c3406c171ab08e73ba151c8cab9eea4b4bf191121"},"schema_version":"1.0"},"canonical_sha256":"deec2476c49b218efea4bf25c185718bf0187784d77f25dbe1929c7ddf1a43ee","source":{"kind":"arxiv","id":"2507.01441","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.01441","created_at":"2026-07-05T11:30:48Z"},{"alias_kind":"arxiv_version","alias_value":"2507.01441v1","created_at":"2026-07-05T11:30:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.01441","created_at":"2026-07-05T11:30:48Z"},{"alias_kind":"pith_short_12","alias_value":"33WCI5WETMQY","created_at":"2026-07-05T11:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"33WCI5WETMQY57VE","created_at":"2026-07-05T11:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"33WCI5WE","created_at":"2026-07-05T11:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:33WCI5WETMQY57VEX4S4DBLRRP","target":"record","payload":{"canonical_record":{"source":{"id":"2507.01441","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-07-02T07:57:54Z","cross_cats_sorted":[],"title_canon_sha256":"5b69e2ba35415843f3fb68e3c6bdb1a5fb296c72879d7b33696db508dbada213","abstract_canon_sha256":"ce26362151f9b2b5a94d3b3c3406c171ab08e73ba151c8cab9eea4b4bf191121"},"schema_version":"1.0"},"canonical_sha256":"deec2476c49b218efea4bf25c185718bf0187784d77f25dbe1929c7ddf1a43ee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:30:48.849054Z","signature_b64":"A67gKqgfjZ3DC5qfwuPpiHLwZF/y2lal8cJqa4lhd0lZt0XRGLD9wPr0XaodGvGoi8cNDWDLJPFDFoaPtVIABA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"deec2476c49b218efea4bf25c185718bf0187784d77f25dbe1929c7ddf1a43ee","last_reissued_at":"2026-07-05T11:30:48.848537Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:30:48.848537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.01441","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":"2026-07-05T11:30:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2aL6cHJhO/gLq9NRXp3F7sPP278340IVWq7uFj7uyZGdRGzrhbve/BOJ0mRwdCWYrYKMPmNOZqctkjLsB+fJBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T03:55:03.574551Z"},"content_sha256":"65550281f58b396912a3660790213bbd0648ace12d958a84517e1b64518dc502","schema_version":"1.0","event_id":"sha256:65550281f58b396912a3660790213bbd0648ace12d958a84517e1b64518dc502"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:33WCI5WETMQY57VEX4S4DBLRRP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraints on the ejecting-crust activity model on comet 67P/Churyumov-Gerasimenko","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Bastian Gundlach, Christian Schuckart, Dorothea Bischoff, Johannes Markkanen, Jurgen Blum, Nicholas Attree, Pedro Guti\\'errez, Yingqi Xin, Yuri Skorov","submitted_at":"2025-07-02T07:57:54Z","abstract_excerpt":"Reproducing the observed activity of comets with thermophysical models remains a primary challenge of cometary science. We use a pebble-based thermophysical model of gas-pressure build-up in the subsurface to reproduce the global emission rates of dust, water, CO$_{2}$, and CO observed by Rosetta at comet 67P/Churyumov-Gerasimenko (hereafter 67P). For sufficiently low diffusivities, the low tensile strength is overcome, leading to the ejection of $\\sim$ millimetre- to decimetre-sized dust-particles as well as roughly the correct outgassing rates. All the ejections, and thus the bulk of the out"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.01441","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/2507.01441/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":"2026-07-05T11:30:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ny6cXCeOHS+tZfBUw37hnujrjETVyWs6VUPEx2lgphklN9EOuVTRW5NSCzOLf3vfInkjDW340IYVszilB6l2Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T03:55:03.575245Z"},"content_sha256":"1e889f935ec7edc6f7da002310e94f3530fb4512a227fff5ec16bb9512236b5d","schema_version":"1.0","event_id":"sha256:1e889f935ec7edc6f7da002310e94f3530fb4512a227fff5ec16bb9512236b5d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/33WCI5WETMQY57VEX4S4DBLRRP/bundle.json","state_url":"https://pith.science/pith/33WCI5WETMQY57VEX4S4DBLRRP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/33WCI5WETMQY57VEX4S4DBLRRP/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":"2026-07-07T03:55:03Z","links":{"resolver":"https://pith.science/pith/33WCI5WETMQY57VEX4S4DBLRRP","bundle":"https://pith.science/pith/33WCI5WETMQY57VEX4S4DBLRRP/bundle.json","state":"https://pith.science/pith/33WCI5WETMQY57VEX4S4DBLRRP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/33WCI5WETMQY57VEX4S4DBLRRP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:33WCI5WETMQY57VEX4S4DBLRRP","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":"ce26362151f9b2b5a94d3b3c3406c171ab08e73ba151c8cab9eea4b4bf191121","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-07-02T07:57:54Z","title_canon_sha256":"5b69e2ba35415843f3fb68e3c6bdb1a5fb296c72879d7b33696db508dbada213"},"schema_version":"1.0","source":{"id":"2507.01441","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.01441","created_at":"2026-07-05T11:30:48Z"},{"alias_kind":"arxiv_version","alias_value":"2507.01441v1","created_at":"2026-07-05T11:30:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.01441","created_at":"2026-07-05T11:30:48Z"},{"alias_kind":"pith_short_12","alias_value":"33WCI5WETMQY","created_at":"2026-07-05T11:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"33WCI5WETMQY57VE","created_at":"2026-07-05T11:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"33WCI5WE","created_at":"2026-07-05T11:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:1e889f935ec7edc6f7da002310e94f3530fb4512a227fff5ec16bb9512236b5d","target":"graph","created_at":"2026-07-05T11:30:48Z","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/2507.01441/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Reproducing the observed activity of comets with thermophysical models remains a primary challenge of cometary science. We use a pebble-based thermophysical model of gas-pressure build-up in the subsurface to reproduce the global emission rates of dust, water, CO$_{2}$, and CO observed by Rosetta at comet 67P/Churyumov-Gerasimenko (hereafter 67P). For sufficiently low diffusivities, the low tensile strength is overcome, leading to the ejection of $\\sim$ millimetre- to decimetre-sized dust-particles as well as roughly the correct outgassing rates. All the ejections, and thus the bulk of the out","authors_text":"Bastian Gundlach, Christian Schuckart, Dorothea Bischoff, Johannes Markkanen, Jurgen Blum, Nicholas Attree, Pedro Guti\\'errez, Yingqi Xin, Yuri Skorov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-07-02T07:57:54Z","title":"Constraints on the ejecting-crust activity model on comet 67P/Churyumov-Gerasimenko"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.01441","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":"sha256:65550281f58b396912a3660790213bbd0648ace12d958a84517e1b64518dc502","target":"record","created_at":"2026-07-05T11:30:48Z","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":"ce26362151f9b2b5a94d3b3c3406c171ab08e73ba151c8cab9eea4b4bf191121","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-07-02T07:57:54Z","title_canon_sha256":"5b69e2ba35415843f3fb68e3c6bdb1a5fb296c72879d7b33696db508dbada213"},"schema_version":"1.0","source":{"id":"2507.01441","kind":"arxiv","version":1}},"canonical_sha256":"deec2476c49b218efea4bf25c185718bf0187784d77f25dbe1929c7ddf1a43ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"deec2476c49b218efea4bf25c185718bf0187784d77f25dbe1929c7ddf1a43ee","first_computed_at":"2026-07-05T11:30:48.848537Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:30:48.848537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A67gKqgfjZ3DC5qfwuPpiHLwZF/y2lal8cJqa4lhd0lZt0XRGLD9wPr0XaodGvGoi8cNDWDLJPFDFoaPtVIABA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:30:48.849054Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.01441","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:65550281f58b396912a3660790213bbd0648ace12d958a84517e1b64518dc502","sha256:1e889f935ec7edc6f7da002310e94f3530fb4512a227fff5ec16bb9512236b5d"],"state_sha256":"d107201607c0cdae75b80bf28d6ecafbc745d0221a9693dfb959ebed6bf21afa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1Pa1s8VQfrLa38FttCAqUQk210e8sLsnW+0taBr3n3sOkRITjlQ2u8TpGiPIvuLT9K1cDvKT0nwuAg6Ys+QUDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T03:55:03.578201Z","bundle_sha256":"e6f6f633e553071bcc9207e3521e04b20861dddd2d469b72d2388045358082ff"}}