{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:EJRBKX4G7XD4VGUL6YEVHSQDZ5","short_pith_number":"pith:EJRBKX4G","canonical_record":{"source":{"id":"1908.05262","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-14T17:39:34Z","cross_cats_sorted":[],"title_canon_sha256":"0c25455f2fa8f586544c78df32524e9616d75c2802441df11d80e0e85f4bc20a","abstract_canon_sha256":"648c186156f88cb96ba56c361c9b41387d937438b8df3968a0b2266f4e355c16"},"schema_version":"1.0"},"canonical_sha256":"2262155f86fdc7ca9a8bf60953ca03cf43aa407eaf28f8c1f0569d9c6de5353b","source":{"kind":"arxiv","id":"1908.05262","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.05262","created_at":"2026-07-05T00:06:53Z"},{"alias_kind":"arxiv_version","alias_value":"1908.05262v1","created_at":"2026-07-05T00:06:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.05262","created_at":"2026-07-05T00:06:53Z"},{"alias_kind":"pith_short_12","alias_value":"EJRBKX4G7XD4","created_at":"2026-07-05T00:06:53Z"},{"alias_kind":"pith_short_16","alias_value":"EJRBKX4G7XD4VGUL","created_at":"2026-07-05T00:06:53Z"},{"alias_kind":"pith_short_8","alias_value":"EJRBKX4G","created_at":"2026-07-05T00:06:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:EJRBKX4G7XD4VGUL6YEVHSQDZ5","target":"record","payload":{"canonical_record":{"source":{"id":"1908.05262","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-14T17:39:34Z","cross_cats_sorted":[],"title_canon_sha256":"0c25455f2fa8f586544c78df32524e9616d75c2802441df11d80e0e85f4bc20a","abstract_canon_sha256":"648c186156f88cb96ba56c361c9b41387d937438b8df3968a0b2266f4e355c16"},"schema_version":"1.0"},"canonical_sha256":"2262155f86fdc7ca9a8bf60953ca03cf43aa407eaf28f8c1f0569d9c6de5353b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:06:53.668687Z","signature_b64":"5V4TK1xl+xOR4zmVFYP/gsCE15LPwAgjJuNZOnn/Aht/7cSge5U+SaF3vnDaBbAuNy/aMBjitIehB8fDGG1eBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2262155f86fdc7ca9a8bf60953ca03cf43aa407eaf28f8c1f0569d9c6de5353b","last_reissued_at":"2026-07-05T00:06:53.668188Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:06:53.668188Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.05262","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":"2026-07-05T00:06:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bGRfWyxgD2wyB+tK5MElWSWadOmeguoQKMqguZKpj6upCdnejAx/lzL+P0YpdKfkwJ13Eyzk6/lKAzuAikWpDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:23:28.168699Z"},"content_sha256":"1216653f98b1f561dcd5392529a4a300e3933812ba8f9bfc3a6ef18ea1657502","schema_version":"1.0","event_id":"sha256:1216653f98b1f561dcd5392529a4a300e3933812ba8f9bfc3a6ef18ea1657502"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:EJRBKX4G7XD4VGUL6YEVHSQDZ5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two-fluid simulations of waves in the solar chromosphere II. Propagation and damping of fast magneto-acoustic waves and shocks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. de Vicente, B. Popescu Braileanu, E. Khomenko, V. S. Lukin","submitted_at":"2019-08-14T17:39:34Z","abstract_excerpt":"Waves and shocks traveling through the solar chromospheric plasma are influenced by its partial ionization and weak collisional coupling, and may become susceptible to multi-fluid effects, similar to interstellar shock waves. In this study, we consider fast magneto-acoustic shock wave formation and propagation in a stratified medium, that is permeated by a horizontal magnetic field, with properties similar to that of the solar chromosphere. The evolution of plasma and neutrals is modeled using a two-fluid code that evolves a set of coupled equations for two separate fluids. We observed that wa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.05262","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/1908.05262/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":"2026-07-05T00:06:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dsY9K804de/xhcgvBGLCwNOEOeryLV/SPQFgxqjZK/JTOybj2pAQaSAeHMwOs8zK5VQmTmlZS452UFaAMZ15AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:23:28.169691Z"},"content_sha256":"92234663874cc5b4c898a52ab9c996fa7bd14df4b41b3a33450a4d5a2eef402e","schema_version":"1.0","event_id":"sha256:92234663874cc5b4c898a52ab9c996fa7bd14df4b41b3a33450a4d5a2eef402e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EJRBKX4G7XD4VGUL6YEVHSQDZ5/bundle.json","state_url":"https://pith.science/pith/EJRBKX4G7XD4VGUL6YEVHSQDZ5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EJRBKX4G7XD4VGUL6YEVHSQDZ5/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":"2026-08-03T18:23:28Z","links":{"resolver":"https://pith.science/pith/EJRBKX4G7XD4VGUL6YEVHSQDZ5","bundle":"https://pith.science/pith/EJRBKX4G7XD4VGUL6YEVHSQDZ5/bundle.json","state":"https://pith.science/pith/EJRBKX4G7XD4VGUL6YEVHSQDZ5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EJRBKX4G7XD4VGUL6YEVHSQDZ5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:EJRBKX4G7XD4VGUL6YEVHSQDZ5","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":"648c186156f88cb96ba56c361c9b41387d937438b8df3968a0b2266f4e355c16","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-14T17:39:34Z","title_canon_sha256":"0c25455f2fa8f586544c78df32524e9616d75c2802441df11d80e0e85f4bc20a"},"schema_version":"1.0","source":{"id":"1908.05262","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.05262","created_at":"2026-07-05T00:06:53Z"},{"alias_kind":"arxiv_version","alias_value":"1908.05262v1","created_at":"2026-07-05T00:06:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.05262","created_at":"2026-07-05T00:06:53Z"},{"alias_kind":"pith_short_12","alias_value":"EJRBKX4G7XD4","created_at":"2026-07-05T00:06:53Z"},{"alias_kind":"pith_short_16","alias_value":"EJRBKX4G7XD4VGUL","created_at":"2026-07-05T00:06:53Z"},{"alias_kind":"pith_short_8","alias_value":"EJRBKX4G","created_at":"2026-07-05T00:06:53Z"}],"graph_snapshots":[{"event_id":"sha256:92234663874cc5b4c898a52ab9c996fa7bd14df4b41b3a33450a4d5a2eef402e","target":"graph","created_at":"2026-07-05T00:06:53Z","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/1908.05262/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Waves and shocks traveling through the solar chromospheric plasma are influenced by its partial ionization and weak collisional coupling, and may become susceptible to multi-fluid effects, similar to interstellar shock waves. In this study, we consider fast magneto-acoustic shock wave formation and propagation in a stratified medium, that is permeated by a horizontal magnetic field, with properties similar to that of the solar chromosphere. The evolution of plasma and neutrals is modeled using a two-fluid code that evolves a set of coupled equations for two separate fluids. We observed that wa","authors_text":"A. de Vicente, B. Popescu Braileanu, E. Khomenko, V. S. Lukin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-14T17:39:34Z","title":"Two-fluid simulations of waves in the solar chromosphere II. Propagation and damping of fast magneto-acoustic waves and shocks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.05262","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":"sha256:1216653f98b1f561dcd5392529a4a300e3933812ba8f9bfc3a6ef18ea1657502","target":"record","created_at":"2026-07-05T00:06:53Z","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":"648c186156f88cb96ba56c361c9b41387d937438b8df3968a0b2266f4e355c16","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-14T17:39:34Z","title_canon_sha256":"0c25455f2fa8f586544c78df32524e9616d75c2802441df11d80e0e85f4bc20a"},"schema_version":"1.0","source":{"id":"1908.05262","kind":"arxiv","version":1}},"canonical_sha256":"2262155f86fdc7ca9a8bf60953ca03cf43aa407eaf28f8c1f0569d9c6de5353b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2262155f86fdc7ca9a8bf60953ca03cf43aa407eaf28f8c1f0569d9c6de5353b","first_computed_at":"2026-07-05T00:06:53.668188Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:06:53.668188Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5V4TK1xl+xOR4zmVFYP/gsCE15LPwAgjJuNZOnn/Aht/7cSge5U+SaF3vnDaBbAuNy/aMBjitIehB8fDGG1eBA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:06:53.668687Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.05262","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1216653f98b1f561dcd5392529a4a300e3933812ba8f9bfc3a6ef18ea1657502","sha256:92234663874cc5b4c898a52ab9c996fa7bd14df4b41b3a33450a4d5a2eef402e"],"state_sha256":"8ff64891327d2d8fe4d93ad1c147c972f9c819db904bc2b2885c4dcd32114e78"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9SBetpF8jgSBZOX834yzOtngi/rlRRiel7hno18dha5ylu39TJfxKY26KPj/WCDGeO1atW588+KaQ6i+2QLYAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T18:23:28.174914Z","bundle_sha256":"d38b9ad71a87546f1dec7f1cc59540d35ddf55ae4a9502e154b784d0803d306c"}}