{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:6Q7XFYUIT5PRLG4IMXQVFKN3L4","short_pith_number":"pith:6Q7XFYUI","canonical_record":{"source":{"id":"1904.06406","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-04-11T10:47:39Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"7437f2969305fa4bc46b070777fe79b712812d0cf4717ede2600fdebb1a50b2a","abstract_canon_sha256":"fe37537c838b01c18d1d6abecb8f60f83ece865f50d9f0f38159319f6511e52c"},"schema_version":"1.0"},"canonical_sha256":"f43f72e2889f5f159b8865e152a9bb5f11d17dbc1d2c5e632085da3ebf5471a3","source":{"kind":"arxiv","id":"1904.06406","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.06406","created_at":"2026-07-05T00:01:48Z"},{"alias_kind":"arxiv_version","alias_value":"1904.06406v1","created_at":"2026-07-05T00:01:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06406","created_at":"2026-07-05T00:01:48Z"},{"alias_kind":"pith_short_12","alias_value":"6Q7XFYUIT5PR","created_at":"2026-07-05T00:01:48Z"},{"alias_kind":"pith_short_16","alias_value":"6Q7XFYUIT5PRLG4I","created_at":"2026-07-05T00:01:48Z"},{"alias_kind":"pith_short_8","alias_value":"6Q7XFYUI","created_at":"2026-07-05T00:01:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:6Q7XFYUIT5PRLG4IMXQVFKN3L4","target":"record","payload":{"canonical_record":{"source":{"id":"1904.06406","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-04-11T10:47:39Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"7437f2969305fa4bc46b070777fe79b712812d0cf4717ede2600fdebb1a50b2a","abstract_canon_sha256":"fe37537c838b01c18d1d6abecb8f60f83ece865f50d9f0f38159319f6511e52c"},"schema_version":"1.0"},"canonical_sha256":"f43f72e2889f5f159b8865e152a9bb5f11d17dbc1d2c5e632085da3ebf5471a3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:01:48.308913Z","signature_b64":"cc0B1nG5Zc+SC7F1ykrbMvD4+Uvoh4A1clQw59KvSrcbjBA56tjWrXIOz/vgjRtDOYOnzlO5uQQ8rlkDo0l+DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f43f72e2889f5f159b8865e152a9bb5f11d17dbc1d2c5e632085da3ebf5471a3","last_reissued_at":"2026-07-05T00:01:48.308472Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:01:48.308472Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.06406","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":"2026-07-05T00:01:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+Hp22lxVUvCooAkk9q6Xh/le39vkFI4rOrK8L4CIXT1IeOn6rpv+oSz1itV2qChNKQYsYPRjKrIxbEduCZK8DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T21:57:59.453473Z"},"content_sha256":"4f258c6e5ee802c9c5fa9c03b099d52ff268ebd16c5b4d8d1eded2ca19aa85af","schema_version":"1.0","event_id":"sha256:4f258c6e5ee802c9c5fa9c03b099d52ff268ebd16c5b4d8d1eded2ca19aa85af"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:6Q7XFYUIT5PRLG4IMXQVFKN3L4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ChAKRA : The high resolution charged particle detector array at VECC","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"A. K. Saha, A. Sen, C. Bhattacharya, G. Mukherjee, J. K. Sahoo, K. Banerjee, P. Dhara A. Dey D. Gupta T. K. Ghosh Pratap Roy, R Mandal Saha, R. Pandey, Samir Kundu, Santu Manna J. K. Meena, S. Bhattacharya, S. R. Bajirao, S. Roy, T. K. Rana","submitted_at":"2019-04-11T10:47:39Z","abstract_excerpt":"A large 4$\\pi$ array of charged particle detectors has been developed at Variable Energy Cyclotron Centre to facilitate high resolution charged particle reaction and spectroscopy studies by detecting event-by-event the charged reaction products emitted in heavy ion reactions at energy $\\sim$ 10-60 MeV/A. The forward part ($\\theta \\sim \\pm $ $7^{0}$ - $\\pm 45^{0}$) of the array consists of 24 highly granular, high resolution charged particle telescopes, each of which is made by three layers [single sided silicon strip($\\Delta$E) + double sided silicon strip (E/$\\Delta$E) + CsI(Tl)(E)]of detecto"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06406","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/1904.06406/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":"2026-07-05T00:01:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XHfp5eOl/j1yAE2GfCNRcdnmbjUqV9z457FbfeYCHPguuV7eNJ2nxq2/k0SPJGl7AQRqc6jkmfAQBCceL13ADw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T21:57:59.454248Z"},"content_sha256":"3773cbf720aefdb90df8ee5da1e2ae62715dc342d27989e288cd3fb25816761c","schema_version":"1.0","event_id":"sha256:3773cbf720aefdb90df8ee5da1e2ae62715dc342d27989e288cd3fb25816761c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6Q7XFYUIT5PRLG4IMXQVFKN3L4/bundle.json","state_url":"https://pith.science/pith/6Q7XFYUIT5PRLG4IMXQVFKN3L4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6Q7XFYUIT5PRLG4IMXQVFKN3L4/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":"2026-08-20T21:57:59Z","links":{"resolver":"https://pith.science/pith/6Q7XFYUIT5PRLG4IMXQVFKN3L4","bundle":"https://pith.science/pith/6Q7XFYUIT5PRLG4IMXQVFKN3L4/bundle.json","state":"https://pith.science/pith/6Q7XFYUIT5PRLG4IMXQVFKN3L4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6Q7XFYUIT5PRLG4IMXQVFKN3L4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:6Q7XFYUIT5PRLG4IMXQVFKN3L4","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":"fe37537c838b01c18d1d6abecb8f60f83ece865f50d9f0f38159319f6511e52c","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-04-11T10:47:39Z","title_canon_sha256":"7437f2969305fa4bc46b070777fe79b712812d0cf4717ede2600fdebb1a50b2a"},"schema_version":"1.0","source":{"id":"1904.06406","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.06406","created_at":"2026-07-05T00:01:48Z"},{"alias_kind":"arxiv_version","alias_value":"1904.06406v1","created_at":"2026-07-05T00:01:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06406","created_at":"2026-07-05T00:01:48Z"},{"alias_kind":"pith_short_12","alias_value":"6Q7XFYUIT5PR","created_at":"2026-07-05T00:01:48Z"},{"alias_kind":"pith_short_16","alias_value":"6Q7XFYUIT5PRLG4I","created_at":"2026-07-05T00:01:48Z"},{"alias_kind":"pith_short_8","alias_value":"6Q7XFYUI","created_at":"2026-07-05T00:01:48Z"}],"graph_snapshots":[{"event_id":"sha256:3773cbf720aefdb90df8ee5da1e2ae62715dc342d27989e288cd3fb25816761c","target":"graph","created_at":"2026-07-05T00:01:48Z","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/1904.06406/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A large 4$\\pi$ array of charged particle detectors has been developed at Variable Energy Cyclotron Centre to facilitate high resolution charged particle reaction and spectroscopy studies by detecting event-by-event the charged reaction products emitted in heavy ion reactions at energy $\\sim$ 10-60 MeV/A. The forward part ($\\theta \\sim \\pm $ $7^{0}$ - $\\pm 45^{0}$) of the array consists of 24 highly granular, high resolution charged particle telescopes, each of which is made by three layers [single sided silicon strip($\\Delta$E) + double sided silicon strip (E/$\\Delta$E) + CsI(Tl)(E)]of detecto","authors_text":"A. K. Saha, A. Sen, C. Bhattacharya, G. Mukherjee, J. K. Sahoo, K. Banerjee, P. Dhara A. Dey D. Gupta T. K. Ghosh Pratap Roy, R Mandal Saha, R. Pandey, Samir Kundu, Santu Manna J. K. Meena, S. Bhattacharya, S. R. Bajirao, S. Roy, T. K. Rana","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-04-11T10:47:39Z","title":"ChAKRA : The high resolution charged particle detector array at VECC"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06406","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":"sha256:4f258c6e5ee802c9c5fa9c03b099d52ff268ebd16c5b4d8d1eded2ca19aa85af","target":"record","created_at":"2026-07-05T00:01:48Z","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":"fe37537c838b01c18d1d6abecb8f60f83ece865f50d9f0f38159319f6511e52c","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-04-11T10:47:39Z","title_canon_sha256":"7437f2969305fa4bc46b070777fe79b712812d0cf4717ede2600fdebb1a50b2a"},"schema_version":"1.0","source":{"id":"1904.06406","kind":"arxiv","version":1}},"canonical_sha256":"f43f72e2889f5f159b8865e152a9bb5f11d17dbc1d2c5e632085da3ebf5471a3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f43f72e2889f5f159b8865e152a9bb5f11d17dbc1d2c5e632085da3ebf5471a3","first_computed_at":"2026-07-05T00:01:48.308472Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:01:48.308472Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cc0B1nG5Zc+SC7F1ykrbMvD4+Uvoh4A1clQw59KvSrcbjBA56tjWrXIOz/vgjRtDOYOnzlO5uQQ8rlkDo0l+DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:01:48.308913Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.06406","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4f258c6e5ee802c9c5fa9c03b099d52ff268ebd16c5b4d8d1eded2ca19aa85af","sha256:3773cbf720aefdb90df8ee5da1e2ae62715dc342d27989e288cd3fb25816761c"],"state_sha256":"47a348cc3544abe77ca8649f2524ac40b3c566cc6216c0a579b5c38887e9e7b6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vLaljK3X2yB5jQBN0xr0+bGOPqTRLEhiPzpUGqn1S6aroc36N+VHMzQBbx1NeiiAMkRxLDcwrrtxZYdv9AXkCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T21:57:59.459898Z","bundle_sha256":"6f2cd8be1cabb6ea86e1f17f7d87d77119c1cf8325c8ced3545d6cf2d817e219"}}