{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:6YFX5RH6N7YFLQS4QGYVJWDLNR","short_pith_number":"pith:6YFX5RH6","canonical_record":{"source":{"id":"1307.4738","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-07-17T19:27:46Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"26783b5725e8a31f2037f17534081df9efa5248812328ef4312055532662f70e","abstract_canon_sha256":"fa9df31c3e2472773a3321e44678da4ed3089c77cdc7b8274a14972ea0eaad9b"},"schema_version":"1.0"},"canonical_sha256":"f60b7ec4fe6ff055c25c81b154d86b6c60ff9d7b81b1aeed77394fd0f969f11f","source":{"kind":"arxiv","id":"1307.4738","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.4738","created_at":"2026-05-18T03:15:05Z"},{"alias_kind":"arxiv_version","alias_value":"1307.4738v2","created_at":"2026-05-18T03:15:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.4738","created_at":"2026-05-18T03:15:05Z"},{"alias_kind":"pith_short_12","alias_value":"6YFX5RH6N7YF","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"6YFX5RH6N7YFLQS4","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"6YFX5RH6","created_at":"2026-05-18T12:27:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:6YFX5RH6N7YFLQS4QGYVJWDLNR","target":"record","payload":{"canonical_record":{"source":{"id":"1307.4738","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-07-17T19:27:46Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"26783b5725e8a31f2037f17534081df9efa5248812328ef4312055532662f70e","abstract_canon_sha256":"fa9df31c3e2472773a3321e44678da4ed3089c77cdc7b8274a14972ea0eaad9b"},"schema_version":"1.0"},"canonical_sha256":"f60b7ec4fe6ff055c25c81b154d86b6c60ff9d7b81b1aeed77394fd0f969f11f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:15:05.563092Z","signature_b64":"jjTOLcYwrBZ71EZSK/Ym64tx70CGDduPEKupCVzA6yLTpucfX/wFALVimc/yKdKFPnSKts2l4Ywjq7bjP0HjBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f60b7ec4fe6ff055c25c81b154d86b6c60ff9d7b81b1aeed77394fd0f969f11f","last_reissued_at":"2026-05-18T03:15:05.562167Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:15:05.562167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.4738","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":"2026-05-18T03:15:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hJe7FhDt1gDtano61DZ3Fr7AAbfj0yvWQU1yDnvxxAeOlKD+z7ZH1tcGK+eUvy43oTjodnd3QgZBlGyTZXIoBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:45:15.536670Z"},"content_sha256":"484e90f63caf223619bdb3bc7074d8ea7c98c28a881fd31e691d32172d81e472","schema_version":"1.0","event_id":"sha256:484e90f63caf223619bdb3bc7074d8ea7c98c28a881fd31e691d32172d81e472"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:6YFX5RH6N7YFLQS4QGYVJWDLNR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Development of a Relic Neutrino Detection Experiment at PTOLEMY: Princeton Tritium Observatory for Light, Early-Universe, Massive-Neutrino Yield","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"astro-ph.IM","authors_text":"A. Cocco, A. Cohen, A. Hopkins, A. Zwicker, B. Harrop, B. Osherson, C. Chang, C. Chen, C. Gentile, C. G. Tully, G. Mangano, J. Dong, J. Taylor, L. Ciebiera, M. Komor, M. Messina, M. Schaefer, N. Jarosik, P. Cloessner, R. H. Carnevale, R. Klemmer, R. Woolley, S. Betts, S. Chidzik, W. R. Blanchard, W. Sands, Y. Raitses","submitted_at":"2013-07-17T19:27:46Z","abstract_excerpt":"The PTOLEMY experiment (Princeton Tritium Observatory for Light, Early-Universe, Massive-Neutrino Yield) aims to achieve the sensitivity required to detect the relic neutrino background through a combination of a large area surface-deposition tritium target, MAC-E filter methods, cryogenic calorimetry, and RF tracking and time-of-flight systems. A small-scale prototype is in operation at the Princeton Plasma Physics Laboratory with the goal of validating the technologies that would enable the design of a 100 gram PTOLEMY. With precision calorimetry in the prototype setup, the limitations from "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4738","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":"2026-05-18T03:15:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8ZC5NkZj7hSK+WZIfOOntgieEomH3cx3/sSKNb4BKiT5pbDBFoRehWsUvo0hHFTlWTd0LF5dplM/XO7OXdC9AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:45:15.537070Z"},"content_sha256":"abb122eef7d82b4ce7db31295c42f815de18d0cbba99625312dad0533a09cf79","schema_version":"1.0","event_id":"sha256:abb122eef7d82b4ce7db31295c42f815de18d0cbba99625312dad0533a09cf79"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6YFX5RH6N7YFLQS4QGYVJWDLNR/bundle.json","state_url":"https://pith.science/pith/6YFX5RH6N7YFLQS4QGYVJWDLNR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6YFX5RH6N7YFLQS4QGYVJWDLNR/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":"2026-05-31T06:45:15Z","links":{"resolver":"https://pith.science/pith/6YFX5RH6N7YFLQS4QGYVJWDLNR","bundle":"https://pith.science/pith/6YFX5RH6N7YFLQS4QGYVJWDLNR/bundle.json","state":"https://pith.science/pith/6YFX5RH6N7YFLQS4QGYVJWDLNR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6YFX5RH6N7YFLQS4QGYVJWDLNR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:6YFX5RH6N7YFLQS4QGYVJWDLNR","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":"fa9df31c3e2472773a3321e44678da4ed3089c77cdc7b8274a14972ea0eaad9b","cross_cats_sorted":["physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-07-17T19:27:46Z","title_canon_sha256":"26783b5725e8a31f2037f17534081df9efa5248812328ef4312055532662f70e"},"schema_version":"1.0","source":{"id":"1307.4738","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.4738","created_at":"2026-05-18T03:15:05Z"},{"alias_kind":"arxiv_version","alias_value":"1307.4738v2","created_at":"2026-05-18T03:15:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.4738","created_at":"2026-05-18T03:15:05Z"},{"alias_kind":"pith_short_12","alias_value":"6YFX5RH6N7YF","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"6YFX5RH6N7YFLQS4","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"6YFX5RH6","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:abb122eef7d82b4ce7db31295c42f815de18d0cbba99625312dad0533a09cf79","target":"graph","created_at":"2026-05-18T03:15:05Z","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":"The PTOLEMY experiment (Princeton Tritium Observatory for Light, Early-Universe, Massive-Neutrino Yield) aims to achieve the sensitivity required to detect the relic neutrino background through a combination of a large area surface-deposition tritium target, MAC-E filter methods, cryogenic calorimetry, and RF tracking and time-of-flight systems. A small-scale prototype is in operation at the Princeton Plasma Physics Laboratory with the goal of validating the technologies that would enable the design of a 100 gram PTOLEMY. With precision calorimetry in the prototype setup, the limitations from ","authors_text":"A. Cocco, A. Cohen, A. Hopkins, A. Zwicker, B. Harrop, B. Osherson, C. Chang, C. Chen, C. Gentile, C. G. Tully, G. Mangano, J. Dong, J. Taylor, L. Ciebiera, M. Komor, M. Messina, M. Schaefer, N. Jarosik, P. Cloessner, R. H. Carnevale, R. Klemmer, R. Woolley, S. Betts, S. Chidzik, W. R. Blanchard, W. Sands, Y. Raitses","cross_cats":["physics.ins-det"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-07-17T19:27:46Z","title":"Development of a Relic Neutrino Detection Experiment at PTOLEMY: Princeton Tritium Observatory for Light, Early-Universe, Massive-Neutrino Yield"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4738","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":"sha256:484e90f63caf223619bdb3bc7074d8ea7c98c28a881fd31e691d32172d81e472","target":"record","created_at":"2026-05-18T03:15:05Z","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":"fa9df31c3e2472773a3321e44678da4ed3089c77cdc7b8274a14972ea0eaad9b","cross_cats_sorted":["physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-07-17T19:27:46Z","title_canon_sha256":"26783b5725e8a31f2037f17534081df9efa5248812328ef4312055532662f70e"},"schema_version":"1.0","source":{"id":"1307.4738","kind":"arxiv","version":2}},"canonical_sha256":"f60b7ec4fe6ff055c25c81b154d86b6c60ff9d7b81b1aeed77394fd0f969f11f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f60b7ec4fe6ff055c25c81b154d86b6c60ff9d7b81b1aeed77394fd0f969f11f","first_computed_at":"2026-05-18T03:15:05.562167Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:15:05.562167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jjTOLcYwrBZ71EZSK/Ym64tx70CGDduPEKupCVzA6yLTpucfX/wFALVimc/yKdKFPnSKts2l4Ywjq7bjP0HjBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:15:05.563092Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.4738","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:484e90f63caf223619bdb3bc7074d8ea7c98c28a881fd31e691d32172d81e472","sha256:abb122eef7d82b4ce7db31295c42f815de18d0cbba99625312dad0533a09cf79"],"state_sha256":"abf2906e7f933626ef604333ff39b4deb3cf7b3218245b170afb55ad9ea265dc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H9uAz3csQgyjFwbvUITqy9SlwP1xpv8yMo19exa95XoUfyWVEzrKPNHRqqpc6IWQQ1OrGBx+BK4NpmxFm73vCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T06:45:15.539160Z","bundle_sha256":"9314097c873f527669ef8bccf6c622916ebf74b77954945b22f863cad25b9d9b"}}