{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:5YPKPH4ZSQXWCENDAQETU7TWGA","short_pith_number":"pith:5YPKPH4Z","canonical_record":{"source":{"id":"1509.00266","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-09-01T12:57:24Z","cross_cats_sorted":[],"title_canon_sha256":"0c5bc13bf698f3374638ab929c4b32000f93f8732a4748f510c4fb8f3d21f005","abstract_canon_sha256":"ce9f82d7bf32c279ddb6a29a91e5fe200a61276a0c71f4965dd062c89041a807"},"schema_version":"1.0"},"canonical_sha256":"ee1ea79f99942f6111a304093a7e7630271937a80023dcb10e891d2abc5ea951","source":{"kind":"arxiv","id":"1509.00266","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.00266","created_at":"2026-07-04T23:55:01Z"},{"alias_kind":"arxiv_version","alias_value":"1509.00266v1","created_at":"2026-07-04T23:55:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.00266","created_at":"2026-07-04T23:55:01Z"},{"alias_kind":"pith_short_12","alias_value":"5YPKPH4ZSQXW","created_at":"2026-07-04T23:55:01Z"},{"alias_kind":"pith_short_16","alias_value":"5YPKPH4ZSQXWCEND","created_at":"2026-07-04T23:55:01Z"},{"alias_kind":"pith_short_8","alias_value":"5YPKPH4Z","created_at":"2026-07-04T23:55:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:5YPKPH4ZSQXWCENDAQETU7TWGA","target":"record","payload":{"canonical_record":{"source":{"id":"1509.00266","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-09-01T12:57:24Z","cross_cats_sorted":[],"title_canon_sha256":"0c5bc13bf698f3374638ab929c4b32000f93f8732a4748f510c4fb8f3d21f005","abstract_canon_sha256":"ce9f82d7bf32c279ddb6a29a91e5fe200a61276a0c71f4965dd062c89041a807"},"schema_version":"1.0"},"canonical_sha256":"ee1ea79f99942f6111a304093a7e7630271937a80023dcb10e891d2abc5ea951","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:55:01.197786Z","signature_b64":"vQMAYi1I8B9lz2e4gtQKSgNrgJ1blDvEyi3QBzQ+3aUH18tiGzJKG2AGTn0asC4QGZRaBU/E6aooual9leNwDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ee1ea79f99942f6111a304093a7e7630271937a80023dcb10e891d2abc5ea951","last_reissued_at":"2026-07-04T23:55:01.197322Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:55:01.197322Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.00266","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":"2026-07-04T23:55:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ff64+qIRFJykFunLy+g0beak3omCgqDz5ADIIzuAsZWeWbyo7wPEdr672fFGOEOn6EzKdf5efN2skHZzYmccBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:25:59.436020Z"},"content_sha256":"588f01da80d9b49ee5ad97f5ad8d9e1ac794fd56140ebb7831dfce0b109134da","schema_version":"1.0","event_id":"sha256:588f01da80d9b49ee5ad97f5ad8d9e1ac794fd56140ebb7831dfce0b109134da"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:5YPKPH4ZSQXWCENDAQETU7TWGA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Using muon rings for the optical throughput calibration of the SST-1M prototype for the Cherenkov Telescope Array","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Christov, A. Frankowski, A. Marsza{\\l}ek, A. Neronov, A. Porcelli, A. Zagda\\'nski, B. Id\\'zkowski, D. della Volpe, D. Mandat, E. jr. Schioppa, E. Lyard, E. Mach, E. Prandini, F. Cadoux, I. Troyano Pujadas, J. B{\\l}ocki, J. Kasperek, J. Micha{\\l}owski, J. Niemiec, K. Lalik, K. Seweryn, K. Skowron, K. Zi\\k{e}tara, L. Bogacz, {\\L}. Grudnik, {\\L}. Stawarz, M. Cury{\\l}o, M. Dyrda, M. Grudzi\\'nska, M. Heller, M. Jamrozy, M. Janiak, M. Ostrowski, M. Pech, M. Rameez, M. Sowi\\'nski, M. Stodulska, M. Stodulski, M. Wi\\k{e}cek, P. Pa\\'sko, P. Rajda, P. Schovanek, P. \\.Zychowski (for the CTA Consortium), R. Moderski, R. Walter, S. Toscano, T. Bulik, T. Montaruli, V. Sliusar, W. Bilnik, Y. Favre","submitted_at":"2015-09-01T12:57:24Z","abstract_excerpt":"Imaging Atmospheric Cherenkov Telescopes (IACTs) are ground-based instruments devoted to the study of very high energy gamma-rays coming from space. The detection technique consists of observing images created by the Cherenkov light emitted when gamma rays, or more generally cosmic rays, propagate through the atmosphere. While in the case of protons or gamma-rays the images present a filled and more or less elongated shape, energetic muons penetrating the atmosphere are visualised as characteristic circular rings or arcs. A relatively simple analysis of the ring images allows the reconstructio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.00266","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/1509.00266/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":"2026-07-04T23:55:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WYgeHDLIHgBLn4hFLOoCpiy/o0uWf+Hojn9EF0wfr4irhkbVU/NQ8L8G63Eh73ZOatBejTu8Zm+66sUhtA7wDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:25:59.436618Z"},"content_sha256":"48f10b055a0b8d9ed6ff64f19432d8ff36109c1d0f2a768dc366660edf0efaf4","schema_version":"1.0","event_id":"sha256:48f10b055a0b8d9ed6ff64f19432d8ff36109c1d0f2a768dc366660edf0efaf4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5YPKPH4ZSQXWCENDAQETU7TWGA/bundle.json","state_url":"https://pith.science/pith/5YPKPH4ZSQXWCENDAQETU7TWGA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5YPKPH4ZSQXWCENDAQETU7TWGA/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":"2026-08-03T18:25:59Z","links":{"resolver":"https://pith.science/pith/5YPKPH4ZSQXWCENDAQETU7TWGA","bundle":"https://pith.science/pith/5YPKPH4ZSQXWCENDAQETU7TWGA/bundle.json","state":"https://pith.science/pith/5YPKPH4ZSQXWCENDAQETU7TWGA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5YPKPH4ZSQXWCENDAQETU7TWGA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:5YPKPH4ZSQXWCENDAQETU7TWGA","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":"ce9f82d7bf32c279ddb6a29a91e5fe200a61276a0c71f4965dd062c89041a807","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-09-01T12:57:24Z","title_canon_sha256":"0c5bc13bf698f3374638ab929c4b32000f93f8732a4748f510c4fb8f3d21f005"},"schema_version":"1.0","source":{"id":"1509.00266","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.00266","created_at":"2026-07-04T23:55:01Z"},{"alias_kind":"arxiv_version","alias_value":"1509.00266v1","created_at":"2026-07-04T23:55:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.00266","created_at":"2026-07-04T23:55:01Z"},{"alias_kind":"pith_short_12","alias_value":"5YPKPH4ZSQXW","created_at":"2026-07-04T23:55:01Z"},{"alias_kind":"pith_short_16","alias_value":"5YPKPH4ZSQXWCEND","created_at":"2026-07-04T23:55:01Z"},{"alias_kind":"pith_short_8","alias_value":"5YPKPH4Z","created_at":"2026-07-04T23:55:01Z"}],"graph_snapshots":[{"event_id":"sha256:48f10b055a0b8d9ed6ff64f19432d8ff36109c1d0f2a768dc366660edf0efaf4","target":"graph","created_at":"2026-07-04T23:55:01Z","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/1509.00266/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Imaging Atmospheric Cherenkov Telescopes (IACTs) are ground-based instruments devoted to the study of very high energy gamma-rays coming from space. The detection technique consists of observing images created by the Cherenkov light emitted when gamma rays, or more generally cosmic rays, propagate through the atmosphere. While in the case of protons or gamma-rays the images present a filled and more or less elongated shape, energetic muons penetrating the atmosphere are visualised as characteristic circular rings or arcs. A relatively simple analysis of the ring images allows the reconstructio","authors_text":"A. Christov, A. Frankowski, A. Marsza{\\l}ek, A. Neronov, A. Porcelli, A. Zagda\\'nski, B. Id\\'zkowski, D. della Volpe, D. Mandat, E. jr. Schioppa, E. Lyard, E. Mach, E. Prandini, F. Cadoux, I. Troyano Pujadas, J. B{\\l}ocki, J. Kasperek, J. Micha{\\l}owski, J. Niemiec, K. Lalik, K. Seweryn, K. Skowron, K. Zi\\k{e}tara, L. Bogacz, {\\L}. Grudnik, {\\L}. Stawarz, M. Cury{\\l}o, M. Dyrda, M. Grudzi\\'nska, M. Heller, M. Jamrozy, M. Janiak, M. Ostrowski, M. Pech, M. Rameez, M. Sowi\\'nski, M. Stodulska, M. Stodulski, M. Wi\\k{e}cek, P. Pa\\'sko, P. Rajda, P. Schovanek, P. \\.Zychowski (for the CTA Consortium), R. Moderski, R. Walter, S. Toscano, T. Bulik, T. Montaruli, V. Sliusar, W. Bilnik, Y. Favre","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-09-01T12:57:24Z","title":"Using muon rings for the optical throughput calibration of the SST-1M prototype for the Cherenkov Telescope Array"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.00266","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":"sha256:588f01da80d9b49ee5ad97f5ad8d9e1ac794fd56140ebb7831dfce0b109134da","target":"record","created_at":"2026-07-04T23:55:01Z","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":"ce9f82d7bf32c279ddb6a29a91e5fe200a61276a0c71f4965dd062c89041a807","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-09-01T12:57:24Z","title_canon_sha256":"0c5bc13bf698f3374638ab929c4b32000f93f8732a4748f510c4fb8f3d21f005"},"schema_version":"1.0","source":{"id":"1509.00266","kind":"arxiv","version":1}},"canonical_sha256":"ee1ea79f99942f6111a304093a7e7630271937a80023dcb10e891d2abc5ea951","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ee1ea79f99942f6111a304093a7e7630271937a80023dcb10e891d2abc5ea951","first_computed_at":"2026-07-04T23:55:01.197322Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:55:01.197322Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vQMAYi1I8B9lz2e4gtQKSgNrgJ1blDvEyi3QBzQ+3aUH18tiGzJKG2AGTn0asC4QGZRaBU/E6aooual9leNwDg==","signature_status":"signed_v1","signed_at":"2026-07-04T23:55:01.197786Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.00266","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:588f01da80d9b49ee5ad97f5ad8d9e1ac794fd56140ebb7831dfce0b109134da","sha256:48f10b055a0b8d9ed6ff64f19432d8ff36109c1d0f2a768dc366660edf0efaf4"],"state_sha256":"ca4bdd94508ffe47a74c067b56f4d852d5a9bbd2c0c206fd62456cb217cd02a6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"evuM7UM+I0oiA0F19Hyp8FHsxYZZAG2X0nPdoOxJFeBCWLTkx8NOsjAIvFJ0ya9UbPpg6o3NYKWggV3qq3HMAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T18:25:59.442249Z","bundle_sha256":"3be23c81f21037f6fae5c90b098c9e0a04209b04e80c252912883e6202ef56c8"}}