{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:RHLHB67L3YZJZWQ2MZ7TXC33AX","short_pith_number":"pith:RHLHB67L","canonical_record":{"source":{"id":"1908.06433","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-08-18T12:44:29Z","cross_cats_sorted":[],"title_canon_sha256":"cdefcc4dcdcb2889c22b68c3fcabc3b2a5c133ab72dad03ab95c365bdf5c469a","abstract_canon_sha256":"278ad63a760d057c0afe3ef434e53d6da4b75cf4803b2ba6c6d4819c94c773f6"},"schema_version":"1.0"},"canonical_sha256":"89d670fbebde329cda1a667f3b8b7b05e79544d0e409079cf49612682ac2b294","source":{"kind":"arxiv","id":"1908.06433","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.06433","created_at":"2026-07-04T23:58:15Z"},{"alias_kind":"arxiv_version","alias_value":"1908.06433v1","created_at":"2026-07-04T23:58:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.06433","created_at":"2026-07-04T23:58:15Z"},{"alias_kind":"pith_short_12","alias_value":"RHLHB67L3YZJ","created_at":"2026-07-04T23:58:15Z"},{"alias_kind":"pith_short_16","alias_value":"RHLHB67L3YZJZWQ2","created_at":"2026-07-04T23:58:15Z"},{"alias_kind":"pith_short_8","alias_value":"RHLHB67L","created_at":"2026-07-04T23:58:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:RHLHB67L3YZJZWQ2MZ7TXC33AX","target":"record","payload":{"canonical_record":{"source":{"id":"1908.06433","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-08-18T12:44:29Z","cross_cats_sorted":[],"title_canon_sha256":"cdefcc4dcdcb2889c22b68c3fcabc3b2a5c133ab72dad03ab95c365bdf5c469a","abstract_canon_sha256":"278ad63a760d057c0afe3ef434e53d6da4b75cf4803b2ba6c6d4819c94c773f6"},"schema_version":"1.0"},"canonical_sha256":"89d670fbebde329cda1a667f3b8b7b05e79544d0e409079cf49612682ac2b294","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:58:15.677804Z","signature_b64":"8DGj4W49eq4EuwDDHjUyHLFktvIZnUdhzo17jRTl3CB7KIaNpUhAh/AOuG9ghxxk3Yogr6ExaEgvM8Zz/hSABA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"89d670fbebde329cda1a667f3b8b7b05e79544d0e409079cf49612682ac2b294","last_reissued_at":"2026-07-04T23:58:15.677400Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:58:15.677400Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.06433","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":"2026-07-04T23:58:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v5/u9rLVrTsCFOIocmm5yUhd9Qzw6GEVSfjtwjs4+ysm2rp0fdSC678mJZuRuWUlV71n4LFb6fIs65wevWeJCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T18:36:45.139104Z"},"content_sha256":"dde87a37929500624f612a9fe58380beb1febbb8f2412efbe2d33a11c91844f1","schema_version":"1.0","event_id":"sha256:dde87a37929500624f612a9fe58380beb1febbb8f2412efbe2d33a11c91844f1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:RHLHB67L3YZJZWQ2MZ7TXC33AX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmic ray composition study using machine learning at the IceCube Neutrino Observatory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Matthias Plum (for the IceCube Collaboration)","submitted_at":"2019-08-18T12:44:29Z","abstract_excerpt":"The evaluation of mass composition of cosmic rays in the knee region ($\\sim 3$ PeV) is critical to understanding the transition in the origin of cosmic rays from galactic to extragalactic sources. The IceCube Neutrino Observatory at the South Pole is a multi-component detector consisting of the surface IceTop array and the deep in-ice IceCube detector. By applying modern machine-learning techniques to cosmic-ray air showers reconstructed coincidentally in both detector components of IceCube observatory, the energy and the mass of primary cosmic rays in this transition region can be measured. I"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.06433","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/1908.06433/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":"2026-07-04T23:58:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WFVNotKToi+6LjZFf/L7SI5mkHSAVAF0PiFg/76c1tkLtxPmYXaLfNTVIzz2R3ZYA6naU7b2gtaidq2OzWebCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T18:36:45.140614Z"},"content_sha256":"5cfba0ef96ef1b7859bbd7573e477eb9bc55c93aaf0b8d2b93ff738f9a2f4131","schema_version":"1.0","event_id":"sha256:5cfba0ef96ef1b7859bbd7573e477eb9bc55c93aaf0b8d2b93ff738f9a2f4131"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RHLHB67L3YZJZWQ2MZ7TXC33AX/bundle.json","state_url":"https://pith.science/pith/RHLHB67L3YZJZWQ2MZ7TXC33AX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RHLHB67L3YZJZWQ2MZ7TXC33AX/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":"2026-08-14T18:36:45Z","links":{"resolver":"https://pith.science/pith/RHLHB67L3YZJZWQ2MZ7TXC33AX","bundle":"https://pith.science/pith/RHLHB67L3YZJZWQ2MZ7TXC33AX/bundle.json","state":"https://pith.science/pith/RHLHB67L3YZJZWQ2MZ7TXC33AX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RHLHB67L3YZJZWQ2MZ7TXC33AX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:RHLHB67L3YZJZWQ2MZ7TXC33AX","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":"278ad63a760d057c0afe3ef434e53d6da4b75cf4803b2ba6c6d4819c94c773f6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-08-18T12:44:29Z","title_canon_sha256":"cdefcc4dcdcb2889c22b68c3fcabc3b2a5c133ab72dad03ab95c365bdf5c469a"},"schema_version":"1.0","source":{"id":"1908.06433","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.06433","created_at":"2026-07-04T23:58:15Z"},{"alias_kind":"arxiv_version","alias_value":"1908.06433v1","created_at":"2026-07-04T23:58:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.06433","created_at":"2026-07-04T23:58:15Z"},{"alias_kind":"pith_short_12","alias_value":"RHLHB67L3YZJ","created_at":"2026-07-04T23:58:15Z"},{"alias_kind":"pith_short_16","alias_value":"RHLHB67L3YZJZWQ2","created_at":"2026-07-04T23:58:15Z"},{"alias_kind":"pith_short_8","alias_value":"RHLHB67L","created_at":"2026-07-04T23:58:15Z"}],"graph_snapshots":[{"event_id":"sha256:5cfba0ef96ef1b7859bbd7573e477eb9bc55c93aaf0b8d2b93ff738f9a2f4131","target":"graph","created_at":"2026-07-04T23:58:15Z","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/1908.06433/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The evaluation of mass composition of cosmic rays in the knee region ($\\sim 3$ PeV) is critical to understanding the transition in the origin of cosmic rays from galactic to extragalactic sources. The IceCube Neutrino Observatory at the South Pole is a multi-component detector consisting of the surface IceTop array and the deep in-ice IceCube detector. By applying modern machine-learning techniques to cosmic-ray air showers reconstructed coincidentally in both detector components of IceCube observatory, the energy and the mass of primary cosmic rays in this transition region can be measured. I","authors_text":"Matthias Plum (for the IceCube Collaboration)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-08-18T12:44:29Z","title":"Cosmic ray composition study using machine learning at the IceCube Neutrino Observatory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.06433","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:dde87a37929500624f612a9fe58380beb1febbb8f2412efbe2d33a11c91844f1","target":"record","created_at":"2026-07-04T23:58:15Z","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":"278ad63a760d057c0afe3ef434e53d6da4b75cf4803b2ba6c6d4819c94c773f6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-08-18T12:44:29Z","title_canon_sha256":"cdefcc4dcdcb2889c22b68c3fcabc3b2a5c133ab72dad03ab95c365bdf5c469a"},"schema_version":"1.0","source":{"id":"1908.06433","kind":"arxiv","version":1}},"canonical_sha256":"89d670fbebde329cda1a667f3b8b7b05e79544d0e409079cf49612682ac2b294","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"89d670fbebde329cda1a667f3b8b7b05e79544d0e409079cf49612682ac2b294","first_computed_at":"2026-07-04T23:58:15.677400Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:58:15.677400Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8DGj4W49eq4EuwDDHjUyHLFktvIZnUdhzo17jRTl3CB7KIaNpUhAh/AOuG9ghxxk3Yogr6ExaEgvM8Zz/hSABA==","signature_status":"signed_v1","signed_at":"2026-07-04T23:58:15.677804Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.06433","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dde87a37929500624f612a9fe58380beb1febbb8f2412efbe2d33a11c91844f1","sha256:5cfba0ef96ef1b7859bbd7573e477eb9bc55c93aaf0b8d2b93ff738f9a2f4131"],"state_sha256":"1e9eb4532d7c979fd005d60a9916095bf569d1779a6281b9ef4cb32c870b6050"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q4Pd6v0aVHl7gFeyKrVPn8GDfIx4SH8yeX+yMi1uWSjcxhFU+FDA0SWOmMh2pgGk9dh0WVzffJzGmUXglNqFCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T18:36:45.146791Z","bundle_sha256":"6d1c2e4ab025a097783ac93062e8081addb6e50e2773a23a6feb89645df5ca23"}}