{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:7TRNJYXHRX44I4HD4WZNTPI2PJ","short_pith_number":"pith:7TRNJYXH","canonical_record":{"source":{"id":"2212.02707","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.space-ph","submitted_at":"2022-12-06T02:03:19Z","cross_cats_sorted":["astro-ph.EP","astro-ph.SR"],"title_canon_sha256":"7e435cc45f27115015c03fcfcce4243c23e7897a738a75b2c4b6ee5fd34f4891","abstract_canon_sha256":"fc791bcb49b5ed63b9a2ba4ca7e05af3ae5314f2c88a265f0437959618237c7c"},"schema_version":"1.0"},"canonical_sha256":"fce2d4e2e78df9c470e3e5b2d9bd1a7a6dfce18c4d9571323c4e923360d376df","source":{"kind":"arxiv","id":"2212.02707","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2212.02707","created_at":"2026-07-05T05:39:27Z"},{"alias_kind":"arxiv_version","alias_value":"2212.02707v1","created_at":"2026-07-05T05:39:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2212.02707","created_at":"2026-07-05T05:39:27Z"},{"alias_kind":"pith_short_12","alias_value":"7TRNJYXHRX44","created_at":"2026-07-05T05:39:27Z"},{"alias_kind":"pith_short_16","alias_value":"7TRNJYXHRX44I4HD","created_at":"2026-07-05T05:39:27Z"},{"alias_kind":"pith_short_8","alias_value":"7TRNJYXH","created_at":"2026-07-05T05:39:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:7TRNJYXHRX44I4HD4WZNTPI2PJ","target":"record","payload":{"canonical_record":{"source":{"id":"2212.02707","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.space-ph","submitted_at":"2022-12-06T02:03:19Z","cross_cats_sorted":["astro-ph.EP","astro-ph.SR"],"title_canon_sha256":"7e435cc45f27115015c03fcfcce4243c23e7897a738a75b2c4b6ee5fd34f4891","abstract_canon_sha256":"fc791bcb49b5ed63b9a2ba4ca7e05af3ae5314f2c88a265f0437959618237c7c"},"schema_version":"1.0"},"canonical_sha256":"fce2d4e2e78df9c470e3e5b2d9bd1a7a6dfce18c4d9571323c4e923360d376df","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:39:27.150522Z","signature_b64":"FCVVKm5BAg9/CtWrqP/lgkQGJ65uyMwnrq+206Dy35vazt+Ta77y7YadgAB3NTcmoSFexllK9+EqjDvNbE6PDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fce2d4e2e78df9c470e3e5b2d9bd1a7a6dfce18c4d9571323c4e923360d376df","last_reissued_at":"2026-07-05T05:39:27.150043Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:39:27.150043Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2212.02707","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":"2026-07-05T05:39:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hYC+E/szxpOy+XVoR8xXm72Y4RtGOrjcA8gyfMAhqEXZFU2hr4VHcMvpt/OM3gvIGFE9DptFxXZk01rqMNqQCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T06:38:46.205575Z"},"content_sha256":"a1772ff35aa65ea2b3d93b308d736fa26c5887756a66370065a9050b16ccc6d1","schema_version":"1.0","event_id":"sha256:a1772ff35aa65ea2b3d93b308d736fa26c5887756a66370065a9050b16ccc6d1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:7TRNJYXHRX44I4HD4WZNTPI2PJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Characterizing ICME-related Forbush Decreases at Mercury using MESSENGER Observations: Identification of a One or Two-Step Structure","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.EP","astro-ph.SR"],"primary_cat":"physics.space-ph","authors_text":"(2) The Johns Hopkins University Applied Physics Laboratory, David J. Lawrence (2) ((1) Institute for the Study of Earth, Durham, Emma E. Davies (1), Laurel, Maryland, New Hampshire, Ocean, R\\'eka M. Winslow (1), Space, University of New Hampshire, USA, USA)","submitted_at":"2022-12-06T02:03:19Z","abstract_excerpt":"The large-scale magnetic structure of interplanetary coronal mass ejections (ICMEs) has been shown to cause decreases in the galactic cosmic ray (GCR) flux measured in situ by spacecraft, known as Forbush decreases (Fds). We use measurements of the GCR count rate obtained by MESSENGER during its orbital phase around Mercury to identify such Fds related to the passage of ICMEs and characterize their structure. Of the 42 ICMEs with corresponding high-quality GCR data, 79% are associated with a Fd. Thus a total of 33 ICME-related Fds were identified, 24 of which (73%) have a two-step structure. W"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2212.02707","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/2212.02707/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":"2026-07-05T05:39:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KXubdoqxt+g7Nxcn/xqGVhoJrTLWVBIFIN3xuK0+wYkSxClE6861NLzhbUAQWxPLZSpcTzLtyZgjzrHn7xNtAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T06:38:46.208004Z"},"content_sha256":"380af6401c9b06a2180b242baab3fe23d715ac36891dba4b137a9c8eff65e9b6","schema_version":"1.0","event_id":"sha256:380af6401c9b06a2180b242baab3fe23d715ac36891dba4b137a9c8eff65e9b6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7TRNJYXHRX44I4HD4WZNTPI2PJ/bundle.json","state_url":"https://pith.science/pith/7TRNJYXHRX44I4HD4WZNTPI2PJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7TRNJYXHRX44I4HD4WZNTPI2PJ/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":"2026-08-12T06:38:46Z","links":{"resolver":"https://pith.science/pith/7TRNJYXHRX44I4HD4WZNTPI2PJ","bundle":"https://pith.science/pith/7TRNJYXHRX44I4HD4WZNTPI2PJ/bundle.json","state":"https://pith.science/pith/7TRNJYXHRX44I4HD4WZNTPI2PJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7TRNJYXHRX44I4HD4WZNTPI2PJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:7TRNJYXHRX44I4HD4WZNTPI2PJ","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":"fc791bcb49b5ed63b9a2ba4ca7e05af3ae5314f2c88a265f0437959618237c7c","cross_cats_sorted":["astro-ph.EP","astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.space-ph","submitted_at":"2022-12-06T02:03:19Z","title_canon_sha256":"7e435cc45f27115015c03fcfcce4243c23e7897a738a75b2c4b6ee5fd34f4891"},"schema_version":"1.0","source":{"id":"2212.02707","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2212.02707","created_at":"2026-07-05T05:39:27Z"},{"alias_kind":"arxiv_version","alias_value":"2212.02707v1","created_at":"2026-07-05T05:39:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2212.02707","created_at":"2026-07-05T05:39:27Z"},{"alias_kind":"pith_short_12","alias_value":"7TRNJYXHRX44","created_at":"2026-07-05T05:39:27Z"},{"alias_kind":"pith_short_16","alias_value":"7TRNJYXHRX44I4HD","created_at":"2026-07-05T05:39:27Z"},{"alias_kind":"pith_short_8","alias_value":"7TRNJYXH","created_at":"2026-07-05T05:39:27Z"}],"graph_snapshots":[{"event_id":"sha256:380af6401c9b06a2180b242baab3fe23d715ac36891dba4b137a9c8eff65e9b6","target":"graph","created_at":"2026-07-05T05:39:27Z","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/2212.02707/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The large-scale magnetic structure of interplanetary coronal mass ejections (ICMEs) has been shown to cause decreases in the galactic cosmic ray (GCR) flux measured in situ by spacecraft, known as Forbush decreases (Fds). We use measurements of the GCR count rate obtained by MESSENGER during its orbital phase around Mercury to identify such Fds related to the passage of ICMEs and characterize their structure. Of the 42 ICMEs with corresponding high-quality GCR data, 79% are associated with a Fd. Thus a total of 33 ICME-related Fds were identified, 24 of which (73%) have a two-step structure. W","authors_text":"(2) The Johns Hopkins University Applied Physics Laboratory, David J. Lawrence (2) ((1) Institute for the Study of Earth, Durham, Emma E. Davies (1), Laurel, Maryland, New Hampshire, Ocean, R\\'eka M. Winslow (1), Space, University of New Hampshire, USA, USA)","cross_cats":["astro-ph.EP","astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.space-ph","submitted_at":"2022-12-06T02:03:19Z","title":"Characterizing ICME-related Forbush Decreases at Mercury using MESSENGER Observations: Identification of a One or Two-Step Structure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2212.02707","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:a1772ff35aa65ea2b3d93b308d736fa26c5887756a66370065a9050b16ccc6d1","target":"record","created_at":"2026-07-05T05:39:27Z","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":"fc791bcb49b5ed63b9a2ba4ca7e05af3ae5314f2c88a265f0437959618237c7c","cross_cats_sorted":["astro-ph.EP","astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.space-ph","submitted_at":"2022-12-06T02:03:19Z","title_canon_sha256":"7e435cc45f27115015c03fcfcce4243c23e7897a738a75b2c4b6ee5fd34f4891"},"schema_version":"1.0","source":{"id":"2212.02707","kind":"arxiv","version":1}},"canonical_sha256":"fce2d4e2e78df9c470e3e5b2d9bd1a7a6dfce18c4d9571323c4e923360d376df","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fce2d4e2e78df9c470e3e5b2d9bd1a7a6dfce18c4d9571323c4e923360d376df","first_computed_at":"2026-07-05T05:39:27.150043Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:39:27.150043Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FCVVKm5BAg9/CtWrqP/lgkQGJ65uyMwnrq+206Dy35vazt+Ta77y7YadgAB3NTcmoSFexllK9+EqjDvNbE6PDw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:39:27.150522Z","signed_message":"canonical_sha256_bytes"},"source_id":"2212.02707","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a1772ff35aa65ea2b3d93b308d736fa26c5887756a66370065a9050b16ccc6d1","sha256:380af6401c9b06a2180b242baab3fe23d715ac36891dba4b137a9c8eff65e9b6"],"state_sha256":"e2d12dd673e9a5f037cf7af8af9339dd1e7ea23f72f1da7fc981901bc4402ff5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9PvnL9HzC2Tg7Z+hob1RfX3fxXULofpu+s3cRJCYk1n3xyP7yQed5jatfX0heRKYgHva6qgok+UUkWKlJuTiDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T06:38:46.213553Z","bundle_sha256":"318dd13b2f56d23cc8f8ac7ce0498c97406fa886fb68b9fbac41e75c5d929d07"}}