{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:FFJZJNTXRT25O2DISELJBQIAWV","short_pith_number":"pith:FFJZJNTX","canonical_record":{"source":{"id":"1309.4010","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-16T15:41:35Z","cross_cats_sorted":["physics.space-ph"],"title_canon_sha256":"19820397ee6145a8cb720c0b5056ab76afc409d2dc0f6d729f1c9c1b7d397f5f","abstract_canon_sha256":"ab259abfb4601e87cd71b7f203e7c57951fee81aba75507fa06c966ce943bce4"},"schema_version":"1.0"},"canonical_sha256":"295394b6778cf5d76868911690c100b5653fd79ca10e723a68c6a2dafb5f0ad1","source":{"kind":"arxiv","id":"1309.4010","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.4010","created_at":"2026-05-18T01:47:41Z"},{"alias_kind":"arxiv_version","alias_value":"1309.4010v2","created_at":"2026-05-18T01:47:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.4010","created_at":"2026-05-18T01:47:41Z"},{"alias_kind":"pith_short_12","alias_value":"FFJZJNTXRT25","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FFJZJNTXRT25O2DI","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FFJZJNTX","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:FFJZJNTXRT25O2DISELJBQIAWV","target":"record","payload":{"canonical_record":{"source":{"id":"1309.4010","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-16T15:41:35Z","cross_cats_sorted":["physics.space-ph"],"title_canon_sha256":"19820397ee6145a8cb720c0b5056ab76afc409d2dc0f6d729f1c9c1b7d397f5f","abstract_canon_sha256":"ab259abfb4601e87cd71b7f203e7c57951fee81aba75507fa06c966ce943bce4"},"schema_version":"1.0"},"canonical_sha256":"295394b6778cf5d76868911690c100b5653fd79ca10e723a68c6a2dafb5f0ad1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:41.413981Z","signature_b64":"DjPQw4yOPC4PL+ELqjFLvcl2KMj0mcPtjQLS06pe6PILvINBd0RHj4OkhpifwmK0JRqwT7n8Pd/rXIZjkXcPCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"295394b6778cf5d76868911690c100b5653fd79ca10e723a68c6a2dafb5f0ad1","last_reissued_at":"2026-05-18T01:47:41.413466Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:41.413466Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.4010","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":"2026-05-18T01:47:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IjL0H0JcWtVoCZDuzPpTGg/8Ji3/hsYiZ8sP56Sw4F01rABhg4kLR5uzxo1aZKEYq1tHNDm3f/G2AFQv19WlAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:24:31.028565Z"},"content_sha256":"1d74b41b97a5fa6955b974072ac1c8c108b1ead983f45b85cefd9b285407d328","schema_version":"1.0","event_id":"sha256:1d74b41b97a5fa6955b974072ac1c8c108b1ead983f45b85cefd9b285407d328"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:FFJZJNTXRT25O2DISELJBQIAWV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Limits on Alpha Particle Temperature Anisotropy and Differential Flow from Kinetic Instabilities: Solar Wind Observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.space-ph"],"primary_cat":"astro-ph.SR","authors_text":"Benjamin D. G. Chandran, Bennett A. Maruca, Daniel Verscharen, Justin C. Kasper, Sofiane Bourouaine","submitted_at":"2013-09-16T15:41:35Z","abstract_excerpt":"Previous studies have shown that the observed temperature anisotropies of protons and alpha particles in the solar wind are constrained by theoretical thresholds for pressure-anisotropy-driven instabilities such as the Alfv\\'en/ion-cyclotron (A/IC) and fast-magnetosonic/whistler (FM/W) instabilities. In this letter, we use a long period of in-situ measurements provided by the {\\em Wind} spacecraft's Faraday cups to investigate the combined constraint on the alpha-proton differential flow velocity and the alpha-particle temperature anisotropy due to A/IC and FM/W instabilities. We show that the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4010","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":"2026-05-18T01:47:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ODXPsl8jzqPFCA9FhX97mCFf64+Lf5u38Bw0YRsW13nqfK9oPMfU1COyJDbAeXzisZFB3u1rUGedMSrwWYUdBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:24:31.028954Z"},"content_sha256":"710e29c72aee4fbadd17cf64a47a33f45f6f7b59fb54c74209ac4db556eba3b9","schema_version":"1.0","event_id":"sha256:710e29c72aee4fbadd17cf64a47a33f45f6f7b59fb54c74209ac4db556eba3b9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FFJZJNTXRT25O2DISELJBQIAWV/bundle.json","state_url":"https://pith.science/pith/FFJZJNTXRT25O2DISELJBQIAWV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FFJZJNTXRT25O2DISELJBQIAWV/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":"2026-05-27T05:24:31Z","links":{"resolver":"https://pith.science/pith/FFJZJNTXRT25O2DISELJBQIAWV","bundle":"https://pith.science/pith/FFJZJNTXRT25O2DISELJBQIAWV/bundle.json","state":"https://pith.science/pith/FFJZJNTXRT25O2DISELJBQIAWV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FFJZJNTXRT25O2DISELJBQIAWV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:FFJZJNTXRT25O2DISELJBQIAWV","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":"ab259abfb4601e87cd71b7f203e7c57951fee81aba75507fa06c966ce943bce4","cross_cats_sorted":["physics.space-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-16T15:41:35Z","title_canon_sha256":"19820397ee6145a8cb720c0b5056ab76afc409d2dc0f6d729f1c9c1b7d397f5f"},"schema_version":"1.0","source":{"id":"1309.4010","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.4010","created_at":"2026-05-18T01:47:41Z"},{"alias_kind":"arxiv_version","alias_value":"1309.4010v2","created_at":"2026-05-18T01:47:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.4010","created_at":"2026-05-18T01:47:41Z"},{"alias_kind":"pith_short_12","alias_value":"FFJZJNTXRT25","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FFJZJNTXRT25O2DI","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FFJZJNTX","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:710e29c72aee4fbadd17cf64a47a33f45f6f7b59fb54c74209ac4db556eba3b9","target":"graph","created_at":"2026-05-18T01:47:41Z","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"},"paper":{"abstract_excerpt":"Previous studies have shown that the observed temperature anisotropies of protons and alpha particles in the solar wind are constrained by theoretical thresholds for pressure-anisotropy-driven instabilities such as the Alfv\\'en/ion-cyclotron (A/IC) and fast-magnetosonic/whistler (FM/W) instabilities. In this letter, we use a long period of in-situ measurements provided by the {\\em Wind} spacecraft's Faraday cups to investigate the combined constraint on the alpha-proton differential flow velocity and the alpha-particle temperature anisotropy due to A/IC and FM/W instabilities. We show that the","authors_text":"Benjamin D. G. Chandran, Bennett A. Maruca, Daniel Verscharen, Justin C. Kasper, Sofiane Bourouaine","cross_cats":["physics.space-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-16T15:41:35Z","title":"Limits on Alpha Particle Temperature Anisotropy and Differential Flow from Kinetic Instabilities: Solar Wind Observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4010","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":"sha256:1d74b41b97a5fa6955b974072ac1c8c108b1ead983f45b85cefd9b285407d328","target":"record","created_at":"2026-05-18T01:47:41Z","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":"ab259abfb4601e87cd71b7f203e7c57951fee81aba75507fa06c966ce943bce4","cross_cats_sorted":["physics.space-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-16T15:41:35Z","title_canon_sha256":"19820397ee6145a8cb720c0b5056ab76afc409d2dc0f6d729f1c9c1b7d397f5f"},"schema_version":"1.0","source":{"id":"1309.4010","kind":"arxiv","version":2}},"canonical_sha256":"295394b6778cf5d76868911690c100b5653fd79ca10e723a68c6a2dafb5f0ad1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"295394b6778cf5d76868911690c100b5653fd79ca10e723a68c6a2dafb5f0ad1","first_computed_at":"2026-05-18T01:47:41.413466Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:41.413466Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DjPQw4yOPC4PL+ELqjFLvcl2KMj0mcPtjQLS06pe6PILvINBd0RHj4OkhpifwmK0JRqwT7n8Pd/rXIZjkXcPCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:41.413981Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.4010","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1d74b41b97a5fa6955b974072ac1c8c108b1ead983f45b85cefd9b285407d328","sha256:710e29c72aee4fbadd17cf64a47a33f45f6f7b59fb54c74209ac4db556eba3b9"],"state_sha256":"fcf4eacec398f4ba8b9d2ef686dbb0032d17aea78004a8ae54f3d35259aadaf0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JdsXuKRg5tV4zNZQ3tKUpXLF5uZJufnjFPQqahWADd0RdQuAbHS0I484A6/vNVMC3ZWtiMMu6fpBCPw1rrfIAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T05:24:31.031684Z","bundle_sha256":"8c9da23e4b566eb76878a9a8600da12b2dfe043e64e9be062b11d476d3013e53"}}