{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:LDGZWSDBJ4SQUAIYI3KTGW3SMZ","short_pith_number":"pith:LDGZWSDB","canonical_record":{"source":{"id":"2505.23956","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2025-05-29T19:16:57Z","cross_cats_sorted":["physics.ao-ph","physics.ins-det","physics.optics"],"title_canon_sha256":"e23c7a3dde3a0b6aa2847beda6e0c66f6e305409b325989b05dd58bd6c488755","abstract_canon_sha256":"d59805d84b05fb00794aef8090ccbe1bf969b834ad897214eb417c32699bbd48"},"schema_version":"1.0"},"canonical_sha256":"58cd9b48614f250a011846d5335b7266431480315823fc809e17af1d0d000111","source":{"kind":"arxiv","id":"2505.23956","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.23956","created_at":"2026-07-05T11:59:15Z"},{"alias_kind":"arxiv_version","alias_value":"2505.23956v1","created_at":"2026-07-05T11:59:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.23956","created_at":"2026-07-05T11:59:15Z"},{"alias_kind":"pith_short_12","alias_value":"LDGZWSDBJ4SQ","created_at":"2026-07-05T11:59:15Z"},{"alias_kind":"pith_short_16","alias_value":"LDGZWSDBJ4SQUAIY","created_at":"2026-07-05T11:59:15Z"},{"alias_kind":"pith_short_8","alias_value":"LDGZWSDB","created_at":"2026-07-05T11:59:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:LDGZWSDBJ4SQUAIYI3KTGW3SMZ","target":"record","payload":{"canonical_record":{"source":{"id":"2505.23956","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2025-05-29T19:16:57Z","cross_cats_sorted":["physics.ao-ph","physics.ins-det","physics.optics"],"title_canon_sha256":"e23c7a3dde3a0b6aa2847beda6e0c66f6e305409b325989b05dd58bd6c488755","abstract_canon_sha256":"d59805d84b05fb00794aef8090ccbe1bf969b834ad897214eb417c32699bbd48"},"schema_version":"1.0"},"canonical_sha256":"58cd9b48614f250a011846d5335b7266431480315823fc809e17af1d0d000111","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:59:15.129333Z","signature_b64":"XUYoHy9x4ckbM74MZo2nIM48jZeNfHHMOYYXNQSVMPd953eDFUnloOdSCmklHBBHzDZuQCLCCUbU5L2UjaBABg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"58cd9b48614f250a011846d5335b7266431480315823fc809e17af1d0d000111","last_reissued_at":"2026-07-05T11:59:15.128895Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:59:15.128895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2505.23956","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":"2026-07-05T11:59:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ep6N1+gGYMswbaatix15iCy2JMuRjOPxfDNEqI56pBeZpxzFLwt2zFHXefLZu/dZDQRACgcvwshhhDSnpzfoDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T09:20:51.906773Z"},"content_sha256":"efcf1f5ac0b7fae55bf5db54ba5fbf44c72024a7a5ba4cf72bb5822ff9eb7395","schema_version":"1.0","event_id":"sha256:efcf1f5ac0b7fae55bf5db54ba5fbf44c72024a7a5ba4cf72bb5822ff9eb7395"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:LDGZWSDBJ4SQUAIYI3KTGW3SMZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Terahertz prototype for air pollutants detection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ao-ph","physics.ins-det","physics.optics"],"primary_cat":"physics.app-ph","authors_text":"Alessandro Curcio, Camilla Merola, Candida Moffa, Daniele Francescone, Fernando Jr. Piamonte Magboo, Giuseppe Zollo, Leonardo Mattiello, Lucia Giuliano, Marco Magi, Massimiliano Coppola, Massimo Petrarca, Massimo Reverberi, Mauro Migliorati, Vittoria Maria Orsini","submitted_at":"2025-05-29T19:16:57Z","abstract_excerpt":"In this work, we propose a prototype set-up exploiting terahertz time-domain spectroscopy (THz-TDS) to investigate gaseous compounds. The system is portable and allows to perform remote measurements. We used the prototype to characterise for the first time in literature over a broad THz range, pure dichloromethane and chloroform, two pollutants known as very short-lived substances (VSLS) that strongly contribute to ozone depletion. The THz range allows selectively detecting their absorption lines related to the rotational molecular motion for which we also present the theoretical confirmation."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.23956","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/2505.23956/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":"2026-07-05T11:59:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ob+kkMN6qTYKEpy8YNEPFyi9LJ2nSCrcl7DOYE8vIaVGefvkgrAZwJG0FxgwPP4NF8LcFAJrM5JXcVo1wr4+Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T09:20:51.907291Z"},"content_sha256":"31639e1c2302b6a989b0391cb5898c84e7a9b3947518994f22a8ad519479b75f","schema_version":"1.0","event_id":"sha256:31639e1c2302b6a989b0391cb5898c84e7a9b3947518994f22a8ad519479b75f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LDGZWSDBJ4SQUAIYI3KTGW3SMZ/bundle.json","state_url":"https://pith.science/pith/LDGZWSDBJ4SQUAIYI3KTGW3SMZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LDGZWSDBJ4SQUAIYI3KTGW3SMZ/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":"2026-08-08T09:20:51Z","links":{"resolver":"https://pith.science/pith/LDGZWSDBJ4SQUAIYI3KTGW3SMZ","bundle":"https://pith.science/pith/LDGZWSDBJ4SQUAIYI3KTGW3SMZ/bundle.json","state":"https://pith.science/pith/LDGZWSDBJ4SQUAIYI3KTGW3SMZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LDGZWSDBJ4SQUAIYI3KTGW3SMZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:LDGZWSDBJ4SQUAIYI3KTGW3SMZ","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":"d59805d84b05fb00794aef8090ccbe1bf969b834ad897214eb417c32699bbd48","cross_cats_sorted":["physics.ao-ph","physics.ins-det","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2025-05-29T19:16:57Z","title_canon_sha256":"e23c7a3dde3a0b6aa2847beda6e0c66f6e305409b325989b05dd58bd6c488755"},"schema_version":"1.0","source":{"id":"2505.23956","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.23956","created_at":"2026-07-05T11:59:15Z"},{"alias_kind":"arxiv_version","alias_value":"2505.23956v1","created_at":"2026-07-05T11:59:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.23956","created_at":"2026-07-05T11:59:15Z"},{"alias_kind":"pith_short_12","alias_value":"LDGZWSDBJ4SQ","created_at":"2026-07-05T11:59:15Z"},{"alias_kind":"pith_short_16","alias_value":"LDGZWSDBJ4SQUAIY","created_at":"2026-07-05T11:59:15Z"},{"alias_kind":"pith_short_8","alias_value":"LDGZWSDB","created_at":"2026-07-05T11:59:15Z"}],"graph_snapshots":[{"event_id":"sha256:31639e1c2302b6a989b0391cb5898c84e7a9b3947518994f22a8ad519479b75f","target":"graph","created_at":"2026-07-05T11:59:15Z","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/2505.23956/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this work, we propose a prototype set-up exploiting terahertz time-domain spectroscopy (THz-TDS) to investigate gaseous compounds. The system is portable and allows to perform remote measurements. We used the prototype to characterise for the first time in literature over a broad THz range, pure dichloromethane and chloroform, two pollutants known as very short-lived substances (VSLS) that strongly contribute to ozone depletion. The THz range allows selectively detecting their absorption lines related to the rotational molecular motion for which we also present the theoretical confirmation.","authors_text":"Alessandro Curcio, Camilla Merola, Candida Moffa, Daniele Francescone, Fernando Jr. Piamonte Magboo, Giuseppe Zollo, Leonardo Mattiello, Lucia Giuliano, Marco Magi, Massimiliano Coppola, Massimo Petrarca, Massimo Reverberi, Mauro Migliorati, Vittoria Maria Orsini","cross_cats":["physics.ao-ph","physics.ins-det","physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2025-05-29T19:16:57Z","title":"Terahertz prototype for air pollutants detection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.23956","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:efcf1f5ac0b7fae55bf5db54ba5fbf44c72024a7a5ba4cf72bb5822ff9eb7395","target":"record","created_at":"2026-07-05T11:59:15Z","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":"d59805d84b05fb00794aef8090ccbe1bf969b834ad897214eb417c32699bbd48","cross_cats_sorted":["physics.ao-ph","physics.ins-det","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2025-05-29T19:16:57Z","title_canon_sha256":"e23c7a3dde3a0b6aa2847beda6e0c66f6e305409b325989b05dd58bd6c488755"},"schema_version":"1.0","source":{"id":"2505.23956","kind":"arxiv","version":1}},"canonical_sha256":"58cd9b48614f250a011846d5335b7266431480315823fc809e17af1d0d000111","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"58cd9b48614f250a011846d5335b7266431480315823fc809e17af1d0d000111","first_computed_at":"2026-07-05T11:59:15.128895Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:59:15.128895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XUYoHy9x4ckbM74MZo2nIM48jZeNfHHMOYYXNQSVMPd953eDFUnloOdSCmklHBBHzDZuQCLCCUbU5L2UjaBABg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:59:15.129333Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.23956","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:efcf1f5ac0b7fae55bf5db54ba5fbf44c72024a7a5ba4cf72bb5822ff9eb7395","sha256:31639e1c2302b6a989b0391cb5898c84e7a9b3947518994f22a8ad519479b75f"],"state_sha256":"12190ae40274deba65f9a9a222b25449fff8ab8e2d2c6d61dd04ee07edb662b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j5mH/KYnh6pdk0mEqk6i4ZVqVzheDM/GwEmqHfizlBdv8jEF9rhEJqulL/IDtz2DRrUWaQvm1RC7xGZdotJrCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T09:20:51.912497Z","bundle_sha256":"78c62ea72975f3c198b7d9c79939de5db3854255b80692225dcbbcc8e353e2f9"}}