{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:GIXA4WNKKNJ364X5QDKGBLPIJ7","short_pith_number":"pith:GIXA4WNK","canonical_record":{"source":{"id":"1808.03680","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-10T19:18:25Z","cross_cats_sorted":[],"title_canon_sha256":"28ccaecb5dd779e194e218685a57c0fd8155b51566c8342ba3148541e4ad3403","abstract_canon_sha256":"34b118358ddcb1148c436df7aac0b201e944607078c188466b3f46d920691c1e"},"schema_version":"1.0"},"canonical_sha256":"322e0e59aa5353bf72fd80d460ade84fc820592040aaa866733ba7f076850ae1","source":{"kind":"arxiv","id":"1808.03680","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.03680","created_at":"2026-05-17T23:55:12Z"},{"alias_kind":"arxiv_version","alias_value":"1808.03680v3","created_at":"2026-05-17T23:55:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.03680","created_at":"2026-05-17T23:55:12Z"},{"alias_kind":"pith_short_12","alias_value":"GIXA4WNKKNJ3","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GIXA4WNKKNJ364X5","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GIXA4WNK","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:GIXA4WNKKNJ364X5QDKGBLPIJ7","target":"record","payload":{"canonical_record":{"source":{"id":"1808.03680","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-10T19:18:25Z","cross_cats_sorted":[],"title_canon_sha256":"28ccaecb5dd779e194e218685a57c0fd8155b51566c8342ba3148541e4ad3403","abstract_canon_sha256":"34b118358ddcb1148c436df7aac0b201e944607078c188466b3f46d920691c1e"},"schema_version":"1.0"},"canonical_sha256":"322e0e59aa5353bf72fd80d460ade84fc820592040aaa866733ba7f076850ae1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:12.127369Z","signature_b64":"fbavsapG+RTZxPL4yLJNmhaKA5AQrDQGFhvuYS70vg8b+tSz11Kz3xYbwIk6PZunQUIpvcJfKRu53FfB1P3HCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"322e0e59aa5353bf72fd80d460ade84fc820592040aaa866733ba7f076850ae1","last_reissued_at":"2026-05-17T23:55:12.126945Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:12.126945Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.03680","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:55:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OUhMg6VurbRdSkmAr8YDzzQkWA7s9QqPv7YZQRJhQySJ3f6e/x0gHfEJhU19go5zsQ7ZPtNL++QVeoJbUokxCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:30:16.951529Z"},"content_sha256":"ba734a8cc11790defdacfa8888f127b825e7ad41ae6e2a94a48ece481a524faf","schema_version":"1.0","event_id":"sha256:ba734a8cc11790defdacfa8888f127b825e7ad41ae6e2a94a48ece481a524faf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:GIXA4WNKKNJ364X5QDKGBLPIJ7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mass composition of ultra-high-energy cosmic rays with the Telescope Array Surface Detector Data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Di Matteo, A. Oshima, A. Taketa, B.G. Cheon, B.K. Shin, B. Lubsandorzhiev, B.T. Stokes, C.C.H. Jui, D.C. Rodriguez, D. Ikeda, D. Ivanov, D.R. Bergman, D. Ryu, E. Barcikowski, E. Kido, F. Kakimoto, F. Shibata, F. Urban, G.B. Thomson, G. Furlich, G. Rubtsov, H.B. Kim, H. Ito, H. Kawai, H.M. Jeong, H. Oda, H. Ohoka, H. Sagawa, H. Shimodaira, H.S. Shin, H. Tanaka, H. Tokuno, H. Yamaoka, H. Yoshii, I.H. Park, I. Myers, I. Tkachev, J. Chiba, J.D. Smith, J.H. Kim, J.N. Matthews, J. Ogura, J.P. Lundquist, J. Remington, J.W. Belz, J. Yang, K. Fujita, K. Hibino, K.H. Lee, K. Honda, K. Kadota, K. Kasahara, K. Kawata, K. Machida, K. Martens, K. Mukai, K. Nagasawa, K. Saito, K. Sekino, K. Tanaka, K. Tsutsumi, K. Yamazaki, K. Yashiro, L.M. Scott, M. Abe, M. Allen, M. Chikawa, M. Fukushima, M. Hayashi, M. Kuznetsov, M. Minamino, M. Ohnishi, M. Ono, M.S. Piskunov, M.S. Pshirkov, M. Takamura, M. Takeda, M. Takita, M. Tanaka, M. Yamamoto, N. Hayashida, N. Inoue, N. Sakaki, N. Sakurai, O. Kalashev, P.D. Shah, P. Sokolsky, P. Tinyakov, R. Azuma, R. Cady, R. Ishimori, R. Mayta, R. Nakamura, R. Onogi, R. Sahara, R. Takeishi, R.U. Abbasi, R. Yamane, S.A. Blake, S.B. Thomas, S. Jeong, S. Kawakami, S. Kawana, S. Kishigami, S. Kitamura, S. Nagataki, S. Ogio, S. Ozawa, S.R. Stratton, S. Troitsky, S. Udo, S. Yoshida, T. Abu-Zayyad, T.A. Stroman, Telescope Array Collaboration, T. Fujii, T. Goto, T. Ishii, T. Matsuyama, T. Nakamura, T. Nonaka, T. Okuda, T. Seki, T. Shibata, T. Suzawa, T. Tomida, T. Wong, V. Kuzmin, W. Hanlon, Y. Hayashi, Y.J. Kwon, Y. Kitamura, Y. Omura, Y. Saito, Y. Takagi, Y. Takahashi, Y. Tameda, Y. Tsunesada, Y. Uchihori, Y. Yoneda, Y. Zhezher, Z. Zundel","submitted_at":"2018-08-10T19:18:25Z","abstract_excerpt":"The results on ultra-high-energy cosmic rays (UHECR) mass composition obtained with the Telescope Array surface detector are presented. The analysis employs the boosted decision tree (BDT) multivariate analysis built upon 14 observables related to both the properties of the shower front and the lateral distribution function. The multivariate classifier is trained with Monte-Carlo sets of events induced by the primary protons and iron. An average atomic mass of UHECR is presented for energies $10^{18.0}-10^{20.0}\\ \\mbox{eV}$. The average atomic mass of primary particles shows no significant ene"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.03680","kind":"arxiv","version":3},"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":"2026-05-17T23:55:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V5FtIm21rDlUQtIpiDk4sLkYFPjOjmYSdf7ICKEqGrKskfQIEKb9Dfe5urgO0p8QGvTsYdzw2NqxVp8zaw+FCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:30:16.952222Z"},"content_sha256":"5014f81fe8de6200d1e1cbe0c4edb1ceb392a0533b2c72ddfbe6be473eb1c7af","schema_version":"1.0","event_id":"sha256:5014f81fe8de6200d1e1cbe0c4edb1ceb392a0533b2c72ddfbe6be473eb1c7af"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GIXA4WNKKNJ364X5QDKGBLPIJ7/bundle.json","state_url":"https://pith.science/pith/GIXA4WNKKNJ364X5QDKGBLPIJ7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GIXA4WNKKNJ364X5QDKGBLPIJ7/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":"2026-05-26T19:30:16Z","links":{"resolver":"https://pith.science/pith/GIXA4WNKKNJ364X5QDKGBLPIJ7","bundle":"https://pith.science/pith/GIXA4WNKKNJ364X5QDKGBLPIJ7/bundle.json","state":"https://pith.science/pith/GIXA4WNKKNJ364X5QDKGBLPIJ7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GIXA4WNKKNJ364X5QDKGBLPIJ7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GIXA4WNKKNJ364X5QDKGBLPIJ7","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":"34b118358ddcb1148c436df7aac0b201e944607078c188466b3f46d920691c1e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-10T19:18:25Z","title_canon_sha256":"28ccaecb5dd779e194e218685a57c0fd8155b51566c8342ba3148541e4ad3403"},"schema_version":"1.0","source":{"id":"1808.03680","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.03680","created_at":"2026-05-17T23:55:12Z"},{"alias_kind":"arxiv_version","alias_value":"1808.03680v3","created_at":"2026-05-17T23:55:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.03680","created_at":"2026-05-17T23:55:12Z"},{"alias_kind":"pith_short_12","alias_value":"GIXA4WNKKNJ3","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GIXA4WNKKNJ364X5","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GIXA4WNK","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:5014f81fe8de6200d1e1cbe0c4edb1ceb392a0533b2c72ddfbe6be473eb1c7af","target":"graph","created_at":"2026-05-17T23:55:12Z","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":"The results on ultra-high-energy cosmic rays (UHECR) mass composition obtained with the Telescope Array surface detector are presented. The analysis employs the boosted decision tree (BDT) multivariate analysis built upon 14 observables related to both the properties of the shower front and the lateral distribution function. The multivariate classifier is trained with Monte-Carlo sets of events induced by the primary protons and iron. An average atomic mass of UHECR is presented for energies $10^{18.0}-10^{20.0}\\ \\mbox{eV}$. The average atomic mass of primary particles shows no significant ene","authors_text":"A. Di Matteo, A. Oshima, A. Taketa, B.G. Cheon, B.K. Shin, B. Lubsandorzhiev, B.T. Stokes, C.C.H. Jui, D.C. Rodriguez, D. Ikeda, D. Ivanov, D.R. Bergman, D. Ryu, E. Barcikowski, E. Kido, F. Kakimoto, F. Shibata, F. Urban, G.B. Thomson, G. Furlich, G. Rubtsov, H.B. Kim, H. Ito, H. Kawai, H.M. Jeong, H. Oda, H. Ohoka, H. Sagawa, H. Shimodaira, H.S. Shin, H. Tanaka, H. Tokuno, H. Yamaoka, H. Yoshii, I.H. Park, I. Myers, I. Tkachev, J. Chiba, J.D. Smith, J.H. Kim, J.N. Matthews, J. Ogura, J.P. Lundquist, J. Remington, J.W. Belz, J. Yang, K. Fujita, K. Hibino, K.H. Lee, K. Honda, K. Kadota, K. Kasahara, K. Kawata, K. Machida, K. Martens, K. Mukai, K. Nagasawa, K. Saito, K. Sekino, K. Tanaka, K. Tsutsumi, K. Yamazaki, K. Yashiro, L.M. Scott, M. Abe, M. Allen, M. Chikawa, M. Fukushima, M. Hayashi, M. Kuznetsov, M. Minamino, M. Ohnishi, M. Ono, M.S. Piskunov, M.S. Pshirkov, M. Takamura, M. Takeda, M. Takita, M. Tanaka, M. Yamamoto, N. Hayashida, N. Inoue, N. Sakaki, N. Sakurai, O. Kalashev, P.D. Shah, P. Sokolsky, P. Tinyakov, R. Azuma, R. Cady, R. Ishimori, R. Mayta, R. Nakamura, R. Onogi, R. Sahara, R. Takeishi, R.U. Abbasi, R. Yamane, S.A. Blake, S.B. Thomas, S. Jeong, S. Kawakami, S. Kawana, S. Kishigami, S. Kitamura, S. Nagataki, S. Ogio, S. Ozawa, S.R. Stratton, S. Troitsky, S. Udo, S. Yoshida, T. Abu-Zayyad, T.A. Stroman, Telescope Array Collaboration, T. Fujii, T. Goto, T. Ishii, T. Matsuyama, T. Nakamura, T. Nonaka, T. Okuda, T. Seki, T. Shibata, T. Suzawa, T. Tomida, T. Wong, V. Kuzmin, W. Hanlon, Y. Hayashi, Y.J. Kwon, Y. Kitamura, Y. Omura, Y. Saito, Y. Takagi, Y. Takahashi, Y. Tameda, Y. Tsunesada, Y. Uchihori, Y. Yoneda, Y. Zhezher, Z. Zundel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-10T19:18:25Z","title":"Mass composition of ultra-high-energy cosmic rays with the Telescope Array Surface Detector Data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.03680","kind":"arxiv","version":3},"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:ba734a8cc11790defdacfa8888f127b825e7ad41ae6e2a94a48ece481a524faf","target":"record","created_at":"2026-05-17T23:55:12Z","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":"34b118358ddcb1148c436df7aac0b201e944607078c188466b3f46d920691c1e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-10T19:18:25Z","title_canon_sha256":"28ccaecb5dd779e194e218685a57c0fd8155b51566c8342ba3148541e4ad3403"},"schema_version":"1.0","source":{"id":"1808.03680","kind":"arxiv","version":3}},"canonical_sha256":"322e0e59aa5353bf72fd80d460ade84fc820592040aaa866733ba7f076850ae1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"322e0e59aa5353bf72fd80d460ade84fc820592040aaa866733ba7f076850ae1","first_computed_at":"2026-05-17T23:55:12.126945Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:12.126945Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fbavsapG+RTZxPL4yLJNmhaKA5AQrDQGFhvuYS70vg8b+tSz11Kz3xYbwIk6PZunQUIpvcJfKRu53FfB1P3HCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:12.127369Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.03680","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ba734a8cc11790defdacfa8888f127b825e7ad41ae6e2a94a48ece481a524faf","sha256:5014f81fe8de6200d1e1cbe0c4edb1ceb392a0533b2c72ddfbe6be473eb1c7af"],"state_sha256":"6849efec1cee3d14b7537bda8fb2b65afa05b8f08beacc195c2ffe5ef2c3b1ee"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x1kxn4FyVlAHFzVR07hlQ5flDwnrHFgAKRBd1gvbzXMS60Q8PYpov5O7K37XoJBa7oc1pfxKSoD0AZlEcLAqAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T19:30:16.955269Z","bundle_sha256":"a3f48a6ae1a1a7f57f60361023b85df6d3ac6ea64e83f5427680fd92b0085926"}}