{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:HJHW7VZN77PGHQV5IEATFKC3XZ","short_pith_number":"pith:HJHW7VZN","canonical_record":{"source":{"id":"1607.02443","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-08T16:33:32Z","cross_cats_sorted":["astro-ph.HE","physics.ins-det"],"title_canon_sha256":"914406149c1d048adccbde2c6826602eef34fe11e5cdec2e173d339fb6c3a27f","abstract_canon_sha256":"b03926f6d0f30ab50282c8fe3207253838715dfe210036c75304357beb2e4ee6"},"schema_version":"1.0"},"canonical_sha256":"3a4f6fd72dffde63c2bd410132a85bbe4e590b24105f27838db4929414ccb7c6","source":{"kind":"arxiv","id":"1607.02443","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.02443","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"arxiv_version","alias_value":"1607.02443v2","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02443","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"pith_short_12","alias_value":"HJHW7VZN77PG","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"HJHW7VZN77PGHQV5","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"HJHW7VZN","created_at":"2026-05-18T12:30:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:HJHW7VZN77PGHQV5IEATFKC3XZ","target":"record","payload":{"canonical_record":{"source":{"id":"1607.02443","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-08T16:33:32Z","cross_cats_sorted":["astro-ph.HE","physics.ins-det"],"title_canon_sha256":"914406149c1d048adccbde2c6826602eef34fe11e5cdec2e173d339fb6c3a27f","abstract_canon_sha256":"b03926f6d0f30ab50282c8fe3207253838715dfe210036c75304357beb2e4ee6"},"schema_version":"1.0"},"canonical_sha256":"3a4f6fd72dffde63c2bd410132a85bbe4e590b24105f27838db4929414ccb7c6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:02.711558Z","signature_b64":"PzSCQEo6Bsl8vW/2RQeYQ0w3sCg38mJOzNt5CEeQfL8VrHwEdyj3qCJ3AOfr9GljIEI3jLCKbkLE5jWX+Q22Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3a4f6fd72dffde63c2bd410132a85bbe4e590b24105f27838db4929414ccb7c6","last_reissued_at":"2026-05-18T00:42:02.711010Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:02.711010Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.02443","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":"2026-05-18T00:42:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x2AGSVIAJmjHXRx+PdmsJhYLFZrwYqL1++xHwSbQ0ueooiXQsFQRfJ3J0T8/2Q0Ucgk66x4UGU5nFSlmkd16AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T21:51:20.704873Z"},"content_sha256":"baec541d402736b2eaba957c2456aee13ad65a831cd1a9badd1e4ad7057066c8","schema_version":"1.0","event_id":"sha256:baec541d402736b2eaba957c2456aee13ad65a831cd1a9badd1e4ad7057066c8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:HJHW7VZN77PGHQV5IEATFKC3XZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"TARGET 5: a new multi-channel digitizer with triggering capabilities for gamma-ray atmospheric Cherenkov telescopes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","physics.ins-det"],"primary_cat":"astro-ph.IM","authors_text":"A. Albert, A. Okumura, G. Varner, H. Tajima, J. Vandenbroucke, L. Sapozhnikov, L. Tibaldo, M. Murphy, R. Quagliani, S. Funk, T. Kawashima, T. Wu","submitted_at":"2016-07-08T16:33:32Z","abstract_excerpt":"TARGET~5 is a new application-specific integrated circuit (ASIC) of the TARGET family, designed for the readout of signals from photosensors in the cameras of imaging atmospheric Cherenkov telescopes (IACTs) for ground-based gamma-ray astronomy. TARGET~5 combines sampling and digitization on 16 signal channels with the formation of trigger signals based on the analog sum of groups of four channels. We describe the ASIC architecture and performance. TARGET~5 improves over the performance of the first-generation TARGET ASIC, achieving: tunable sampling frequency from $<0.4$~GSa/s to $>1$~GSa/s; "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.02443","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":"2026-05-18T00:42:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hdyJHJWNexMKVDeye05gWnEaXbaELqas0MOd5CbcT/DLnSKeQj3OWxL7/N3eV6HRlm9FDhgvEy4SGGoB59XOAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T21:51:20.705218Z"},"content_sha256":"6f5394e65e26ee24424477f8cdc2b966f66744fa85f223c5210f2f1f3570f61e","schema_version":"1.0","event_id":"sha256:6f5394e65e26ee24424477f8cdc2b966f66744fa85f223c5210f2f1f3570f61e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HJHW7VZN77PGHQV5IEATFKC3XZ/bundle.json","state_url":"https://pith.science/pith/HJHW7VZN77PGHQV5IEATFKC3XZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HJHW7VZN77PGHQV5IEATFKC3XZ/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":"2026-06-03T21:51:20Z","links":{"resolver":"https://pith.science/pith/HJHW7VZN77PGHQV5IEATFKC3XZ","bundle":"https://pith.science/pith/HJHW7VZN77PGHQV5IEATFKC3XZ/bundle.json","state":"https://pith.science/pith/HJHW7VZN77PGHQV5IEATFKC3XZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HJHW7VZN77PGHQV5IEATFKC3XZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:HJHW7VZN77PGHQV5IEATFKC3XZ","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":"b03926f6d0f30ab50282c8fe3207253838715dfe210036c75304357beb2e4ee6","cross_cats_sorted":["astro-ph.HE","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-08T16:33:32Z","title_canon_sha256":"914406149c1d048adccbde2c6826602eef34fe11e5cdec2e173d339fb6c3a27f"},"schema_version":"1.0","source":{"id":"1607.02443","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.02443","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"arxiv_version","alias_value":"1607.02443v2","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02443","created_at":"2026-05-18T00:42:02Z"},{"alias_kind":"pith_short_12","alias_value":"HJHW7VZN77PG","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"HJHW7VZN77PGHQV5","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"HJHW7VZN","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:6f5394e65e26ee24424477f8cdc2b966f66744fa85f223c5210f2f1f3570f61e","target":"graph","created_at":"2026-05-18T00:42:02Z","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":"TARGET~5 is a new application-specific integrated circuit (ASIC) of the TARGET family, designed for the readout of signals from photosensors in the cameras of imaging atmospheric Cherenkov telescopes (IACTs) for ground-based gamma-ray astronomy. TARGET~5 combines sampling and digitization on 16 signal channels with the formation of trigger signals based on the analog sum of groups of four channels. We describe the ASIC architecture and performance. TARGET~5 improves over the performance of the first-generation TARGET ASIC, achieving: tunable sampling frequency from $<0.4$~GSa/s to $>1$~GSa/s; ","authors_text":"A. Albert, A. Okumura, G. Varner, H. Tajima, J. Vandenbroucke, L. Sapozhnikov, L. Tibaldo, M. Murphy, R. Quagliani, S. Funk, T. Kawashima, T. Wu","cross_cats":["astro-ph.HE","physics.ins-det"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-08T16:33:32Z","title":"TARGET 5: a new multi-channel digitizer with triggering capabilities for gamma-ray atmospheric Cherenkov telescopes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.02443","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:baec541d402736b2eaba957c2456aee13ad65a831cd1a9badd1e4ad7057066c8","target":"record","created_at":"2026-05-18T00:42:02Z","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":"b03926f6d0f30ab50282c8fe3207253838715dfe210036c75304357beb2e4ee6","cross_cats_sorted":["astro-ph.HE","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-08T16:33:32Z","title_canon_sha256":"914406149c1d048adccbde2c6826602eef34fe11e5cdec2e173d339fb6c3a27f"},"schema_version":"1.0","source":{"id":"1607.02443","kind":"arxiv","version":2}},"canonical_sha256":"3a4f6fd72dffde63c2bd410132a85bbe4e590b24105f27838db4929414ccb7c6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3a4f6fd72dffde63c2bd410132a85bbe4e590b24105f27838db4929414ccb7c6","first_computed_at":"2026-05-18T00:42:02.711010Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:42:02.711010Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PzSCQEo6Bsl8vW/2RQeYQ0w3sCg38mJOzNt5CEeQfL8VrHwEdyj3qCJ3AOfr9GljIEI3jLCKbkLE5jWX+Q22Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:42:02.711558Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.02443","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:baec541d402736b2eaba957c2456aee13ad65a831cd1a9badd1e4ad7057066c8","sha256:6f5394e65e26ee24424477f8cdc2b966f66744fa85f223c5210f2f1f3570f61e"],"state_sha256":"a0b0cb11b2497fd62fbfe127c29baa963aaf1b33df0ce5203e51f2434306bfe6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tyVZMeeXN3V0CuH+H3o4H6lKXk/Egj2Ctyv9tx4LTRsS9g2/5GwcxAQA3IrQgTJ4JQxsDT+YNVVqpUZTKJdPBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T21:51:20.707184Z","bundle_sha256":"6251821f37f98d03b726303ed0fe7d8b11e87874bf10e5a6062004ec3a795e59"}}