{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:N724WRTJ7L4BPULIV2Q3LHVWSO","short_pith_number":"pith:N724WRTJ","canonical_record":{"source":{"id":"1107.5885","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-07-29T07:14:37Z","cross_cats_sorted":[],"title_canon_sha256":"9d41feecca1ba98a5f8ab2aaa2018a18d7ed5d7c76371e95831e0e3f60f9f54b","abstract_canon_sha256":"247b2fbdc57c26bb6d8ddc1b97d79c2846476265710741c7f16e713ff3123b86"},"schema_version":"1.0"},"canonical_sha256":"6ff5cb4669faf817d168aea1b59eb693952d03f3f53fc90419662b5df0f9bd51","source":{"kind":"arxiv","id":"1107.5885","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.5885","created_at":"2026-05-18T02:01:05Z"},{"alias_kind":"arxiv_version","alias_value":"1107.5885v2","created_at":"2026-05-18T02:01:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.5885","created_at":"2026-05-18T02:01:05Z"},{"alias_kind":"pith_short_12","alias_value":"N724WRTJ7L4B","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"N724WRTJ7L4BPULI","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"N724WRTJ","created_at":"2026-05-18T12:26:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:N724WRTJ7L4BPULIV2Q3LHVWSO","target":"record","payload":{"canonical_record":{"source":{"id":"1107.5885","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-07-29T07:14:37Z","cross_cats_sorted":[],"title_canon_sha256":"9d41feecca1ba98a5f8ab2aaa2018a18d7ed5d7c76371e95831e0e3f60f9f54b","abstract_canon_sha256":"247b2fbdc57c26bb6d8ddc1b97d79c2846476265710741c7f16e713ff3123b86"},"schema_version":"1.0"},"canonical_sha256":"6ff5cb4669faf817d168aea1b59eb693952d03f3f53fc90419662b5df0f9bd51","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:05.989045Z","signature_b64":"yjGlwnpJVKO/KqTXHA9v3PciJAYNethjAGafRE3bhWbtV5IGlvzpmZqU7PPWNKG6I6+TFH/cDqQzxrBcsQqrDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6ff5cb4669faf817d168aea1b59eb693952d03f3f53fc90419662b5df0f9bd51","last_reissued_at":"2026-05-18T02:01:05.988384Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:05.988384Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1107.5885","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":"2026-05-18T02:01:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1MIG2fxMRAQFKEEmhEIQtH/vOdqnK5EDY//VOS2ZQONG+LbCEjWxQtdksQHwzPohTLZYOIegxosKeo5AHEQZBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T20:43:35.742419Z"},"content_sha256":"b19db0e83bfaa30156761dedfdec0b1bbed69c0a81d2fb897d9f9a96d90a1dd4","schema_version":"1.0","event_id":"sha256:b19db0e83bfaa30156761dedfdec0b1bbed69c0a81d2fb897d9f9a96d90a1dd4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:N724WRTJ7L4BPULIV2Q3LHVWSO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Kneelike structure in the spectrum of the heavy component of cosmic rays observed with KASCADE-Grande","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Chiavassa, A. Haungs, A. Weindl, B. Mitrica, C. Grupen, C. Morello, D. Fuhrmann, D. Heck, D. Huber, D. Kang, E. Cantoni3, F. Cossavella, F. Di Pierro, F.G. Schroeder, G.C. Trinchero, G. Navarra, G. Toma, H. Bozdog, H.J. Gils, H.J. Mathes, H.J. Mayer, H.O. Klages, H. Rebel, H. Schieler, H. Ulrich, I.M. Brancus, J. Bluemer, J.C. Arteaga-Velazquez, J. Engler, J. Milke, J. Oehlschlaeger, J.R. Hoerandel, J. Wochele, J. Zabierowski, K. Bekk, K. Daumiller, K.-H. Kampert, K. Link, M. Bertaina, M. Finger, M. Ludwig, M. Melissas, M. Petcu, M. Roth, M. Wommer, N. Palmieri, O. Sima, P. Buchholz, P. Doll, P.G. Isar, P.L. Ghia, P. Luczak, R. Engel, R. Glasstetter, S. Ostapchenko, S. Over, The KASCADE-Grande Collaboration: W.D. Apel, T. Huege, T. Pierog, V. de Souza","submitted_at":"2011-07-29T07:14:37Z","abstract_excerpt":"We report the observation of a steepening in the cosmic ray energy spectrum of heavy primary particles at about $8 \\times 10^{16}$ eV. This structure is also seen in the all-particle energy spectrum, but is less significant. Whereas the `knee' of the cosmic ray spectrum at $3-5 \\times 10^{15}$ eV was assigned to light primary masses by the KASCADE experiment, the new structure found by the KASCADE-Grande experiment is caused by heavy primaries. The result is obtained by independent measurements of the charged particle and muon components of the secondary particles of extensive air showers in t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.5885","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":"2026-05-18T02:01:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pGFNk9o0e6D3oUybcMtbFES3/L9sxBNFoyuACe6baGw/V9WNyBYxiWIQvvJQnampSz7AoPh1v414WeDugoOyBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T20:43:35.742771Z"},"content_sha256":"7350dbdfde541081cc5a28435ea8d89ba0fc2bb9f87c7478907e50950a9cd30f","schema_version":"1.0","event_id":"sha256:7350dbdfde541081cc5a28435ea8d89ba0fc2bb9f87c7478907e50950a9cd30f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/N724WRTJ7L4BPULIV2Q3LHVWSO/bundle.json","state_url":"https://pith.science/pith/N724WRTJ7L4BPULIV2Q3LHVWSO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/N724WRTJ7L4BPULIV2Q3LHVWSO/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":"2026-06-29T20:43:35Z","links":{"resolver":"https://pith.science/pith/N724WRTJ7L4BPULIV2Q3LHVWSO","bundle":"https://pith.science/pith/N724WRTJ7L4BPULIV2Q3LHVWSO/bundle.json","state":"https://pith.science/pith/N724WRTJ7L4BPULIV2Q3LHVWSO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/N724WRTJ7L4BPULIV2Q3LHVWSO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:N724WRTJ7L4BPULIV2Q3LHVWSO","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":"247b2fbdc57c26bb6d8ddc1b97d79c2846476265710741c7f16e713ff3123b86","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-07-29T07:14:37Z","title_canon_sha256":"9d41feecca1ba98a5f8ab2aaa2018a18d7ed5d7c76371e95831e0e3f60f9f54b"},"schema_version":"1.0","source":{"id":"1107.5885","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.5885","created_at":"2026-05-18T02:01:05Z"},{"alias_kind":"arxiv_version","alias_value":"1107.5885v2","created_at":"2026-05-18T02:01:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.5885","created_at":"2026-05-18T02:01:05Z"},{"alias_kind":"pith_short_12","alias_value":"N724WRTJ7L4B","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"N724WRTJ7L4BPULI","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"N724WRTJ","created_at":"2026-05-18T12:26:37Z"}],"graph_snapshots":[{"event_id":"sha256:7350dbdfde541081cc5a28435ea8d89ba0fc2bb9f87c7478907e50950a9cd30f","target":"graph","created_at":"2026-05-18T02:01:05Z","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":"We report the observation of a steepening in the cosmic ray energy spectrum of heavy primary particles at about $8 \\times 10^{16}$ eV. This structure is also seen in the all-particle energy spectrum, but is less significant. Whereas the `knee' of the cosmic ray spectrum at $3-5 \\times 10^{15}$ eV was assigned to light primary masses by the KASCADE experiment, the new structure found by the KASCADE-Grande experiment is caused by heavy primaries. The result is obtained by independent measurements of the charged particle and muon components of the secondary particles of extensive air showers in t","authors_text":"A. Chiavassa, A. Haungs, A. Weindl, B. Mitrica, C. Grupen, C. Morello, D. Fuhrmann, D. Heck, D. Huber, D. Kang, E. Cantoni3, F. Cossavella, F. Di Pierro, F.G. Schroeder, G.C. Trinchero, G. Navarra, G. Toma, H. Bozdog, H.J. Gils, H.J. Mathes, H.J. Mayer, H.O. Klages, H. Rebel, H. Schieler, H. Ulrich, I.M. Brancus, J. Bluemer, J.C. Arteaga-Velazquez, J. Engler, J. Milke, J. Oehlschlaeger, J.R. Hoerandel, J. Wochele, J. Zabierowski, K. Bekk, K. Daumiller, K.-H. Kampert, K. Link, M. Bertaina, M. Finger, M. Ludwig, M. Melissas, M. Petcu, M. Roth, M. Wommer, N. Palmieri, O. Sima, P. Buchholz, P. Doll, P.G. Isar, P.L. Ghia, P. Luczak, R. Engel, R. Glasstetter, S. Ostapchenko, S. Over, The KASCADE-Grande Collaboration: W.D. Apel, T. Huege, T. Pierog, V. de Souza","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-07-29T07:14:37Z","title":"Kneelike structure in the spectrum of the heavy component of cosmic rays observed with KASCADE-Grande"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.5885","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:b19db0e83bfaa30156761dedfdec0b1bbed69c0a81d2fb897d9f9a96d90a1dd4","target":"record","created_at":"2026-05-18T02:01:05Z","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":"247b2fbdc57c26bb6d8ddc1b97d79c2846476265710741c7f16e713ff3123b86","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-07-29T07:14:37Z","title_canon_sha256":"9d41feecca1ba98a5f8ab2aaa2018a18d7ed5d7c76371e95831e0e3f60f9f54b"},"schema_version":"1.0","source":{"id":"1107.5885","kind":"arxiv","version":2}},"canonical_sha256":"6ff5cb4669faf817d168aea1b59eb693952d03f3f53fc90419662b5df0f9bd51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6ff5cb4669faf817d168aea1b59eb693952d03f3f53fc90419662b5df0f9bd51","first_computed_at":"2026-05-18T02:01:05.988384Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:05.988384Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yjGlwnpJVKO/KqTXHA9v3PciJAYNethjAGafRE3bhWbtV5IGlvzpmZqU7PPWNKG6I6+TFH/cDqQzxrBcsQqrDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:05.989045Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.5885","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b19db0e83bfaa30156761dedfdec0b1bbed69c0a81d2fb897d9f9a96d90a1dd4","sha256:7350dbdfde541081cc5a28435ea8d89ba0fc2bb9f87c7478907e50950a9cd30f"],"state_sha256":"abfda2fa0030b534d0b5907c740d3b1a35b083f3bb54c4cf22179704e52547af"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UH/Q+oCz29ljLShcg57Eif/jaBg/eolv23LXbLXVOmfDUIHiW3GIvFFUoB7szgDGh1CbshGddhqqO1hU7iIoCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T20:43:35.744572Z","bundle_sha256":"5b1759a183d275a37410a35596bc003a6b7076b4fa9702d5554893680685c79a"}}