{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:6XLCSAZOO2VKWQWYVWTUTOJ42V","short_pith_number":"pith:6XLCSAZO","canonical_record":{"source":{"id":"0708.2089","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-15T19:10:41Z","cross_cats_sorted":[],"title_canon_sha256":"e397ecdf00e3f10cc8773e0be35cdb68d6fc4125543d5c7f54934d4200c49f9b","abstract_canon_sha256":"618cd1697365a22f29297bd8eb6f70be34ede8928b3f76930bfec939b675bf73"},"schema_version":"1.0"},"canonical_sha256":"f5d629032e76aaab42d8ada749b93cd57664231dbc40cc78535c02554ddc499f","source":{"kind":"arxiv","id":"0708.2089","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0708.2089","created_at":"2026-07-04T15:03:38Z"},{"alias_kind":"arxiv_version","alias_value":"0708.2089v1","created_at":"2026-07-04T15:03:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0708.2089","created_at":"2026-07-04T15:03:38Z"},{"alias_kind":"pith_short_12","alias_value":"6XLCSAZOO2VK","created_at":"2026-07-04T15:03:38Z"},{"alias_kind":"pith_short_16","alias_value":"6XLCSAZOO2VKWQWY","created_at":"2026-07-04T15:03:38Z"},{"alias_kind":"pith_short_8","alias_value":"6XLCSAZO","created_at":"2026-07-04T15:03:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:6XLCSAZOO2VKWQWYVWTUTOJ42V","target":"record","payload":{"canonical_record":{"source":{"id":"0708.2089","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-15T19:10:41Z","cross_cats_sorted":[],"title_canon_sha256":"e397ecdf00e3f10cc8773e0be35cdb68d6fc4125543d5c7f54934d4200c49f9b","abstract_canon_sha256":"618cd1697365a22f29297bd8eb6f70be34ede8928b3f76930bfec939b675bf73"},"schema_version":"1.0"},"canonical_sha256":"f5d629032e76aaab42d8ada749b93cd57664231dbc40cc78535c02554ddc499f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:03:38.730410Z","signature_b64":"3MgiFOygKYElMCoYKuT2cXYZZbPzZ5v/1cs85UvcsJjVph02M9y5rQOQUAHtozk1XhcedACzmw7eSCw5D10zBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f5d629032e76aaab42d8ada749b93cd57664231dbc40cc78535c02554ddc499f","last_reissued_at":"2026-07-04T15:03:38.730047Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:03:38.730047Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0708.2089","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":"2026-07-04T15:03:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jHvS6KXjRf0b05zOMQtL2T+s3nokivJCUGmsHBLo0kL20LHY8zu9mFm+wrLYRqUNtdmDLJ0RnBlfTku03QTEBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T03:26:19.883109Z"},"content_sha256":"32c93461b70feda7adeb4411024a70460be8160a303b95293c4a3b6bebf82288","schema_version":"1.0","event_id":"sha256:32c93461b70feda7adeb4411024a70460be8160a303b95293c4a3b6bebf82288"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:6XLCSAZOO2VKWQWYVWTUTOJ42V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Feasibility of acoustic neutrino detection in ice: First results from the South Pole Acoustic Test Setup (SPATS)","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Hallgren, C. Bohm, D. Tosi, F. Descamps, J. Fischer, J. Vandenbroucke, K.-H. Sulanke, K. Krieger, M. Pohl, P. B. Price, R. Heller, R. Nahnhauer, S. B\\\"oser, S. Hundertmark","submitted_at":"2007-08-15T19:10:41Z","abstract_excerpt":"Astrophysical neutrinos in the EeV range (particularly those generated by the interaction of cosmic rays with the cosmic microwave background) promise to be a valuable tool to study astrophysics and particle physics at the highest energies. Much could be learned from temporal, spectral, and angular distributions of ~100 events, which could be collected by a detector with ~100 km^3 effective volume in a few years. Scaling the optical Cherenkov technique to this scale is prohibitive. However, using the thick ice sheet available at the South Pole, the radio and acoustic techniques promise to prov"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0708.2089","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/0708.2089/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":"2026-07-04T15:03:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mOcNY8nqPnBeCZQwZR8GTy4xd3uekSPtGxPtul1G0HYWMquO00O7AmnLmd69xIhObj78qyCrxqNg7cn59IE9Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T03:26:19.883639Z"},"content_sha256":"6d8f64dbb7cb4e66a32cc73ff8a95ac5329cc5a42a19d3e78b1b20b0a4ac980b","schema_version":"1.0","event_id":"sha256:6d8f64dbb7cb4e66a32cc73ff8a95ac5329cc5a42a19d3e78b1b20b0a4ac980b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6XLCSAZOO2VKWQWYVWTUTOJ42V/bundle.json","state_url":"https://pith.science/pith/6XLCSAZOO2VKWQWYVWTUTOJ42V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6XLCSAZOO2VKWQWYVWTUTOJ42V/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":"2026-08-05T03:26:19Z","links":{"resolver":"https://pith.science/pith/6XLCSAZOO2VKWQWYVWTUTOJ42V","bundle":"https://pith.science/pith/6XLCSAZOO2VKWQWYVWTUTOJ42V/bundle.json","state":"https://pith.science/pith/6XLCSAZOO2VKWQWYVWTUTOJ42V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6XLCSAZOO2VKWQWYVWTUTOJ42V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:6XLCSAZOO2VKWQWYVWTUTOJ42V","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":"618cd1697365a22f29297bd8eb6f70be34ede8928b3f76930bfec939b675bf73","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-15T19:10:41Z","title_canon_sha256":"e397ecdf00e3f10cc8773e0be35cdb68d6fc4125543d5c7f54934d4200c49f9b"},"schema_version":"1.0","source":{"id":"0708.2089","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0708.2089","created_at":"2026-07-04T15:03:38Z"},{"alias_kind":"arxiv_version","alias_value":"0708.2089v1","created_at":"2026-07-04T15:03:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0708.2089","created_at":"2026-07-04T15:03:38Z"},{"alias_kind":"pith_short_12","alias_value":"6XLCSAZOO2VK","created_at":"2026-07-04T15:03:38Z"},{"alias_kind":"pith_short_16","alias_value":"6XLCSAZOO2VKWQWY","created_at":"2026-07-04T15:03:38Z"},{"alias_kind":"pith_short_8","alias_value":"6XLCSAZO","created_at":"2026-07-04T15:03:38Z"}],"graph_snapshots":[{"event_id":"sha256:6d8f64dbb7cb4e66a32cc73ff8a95ac5329cc5a42a19d3e78b1b20b0a4ac980b","target":"graph","created_at":"2026-07-04T15:03:38Z","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/0708.2089/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Astrophysical neutrinos in the EeV range (particularly those generated by the interaction of cosmic rays with the cosmic microwave background) promise to be a valuable tool to study astrophysics and particle physics at the highest energies. Much could be learned from temporal, spectral, and angular distributions of ~100 events, which could be collected by a detector with ~100 km^3 effective volume in a few years. Scaling the optical Cherenkov technique to this scale is prohibitive. However, using the thick ice sheet available at the South Pole, the radio and acoustic techniques promise to prov","authors_text":"A. Hallgren, C. Bohm, D. Tosi, F. Descamps, J. Fischer, J. Vandenbroucke, K.-H. Sulanke, K. Krieger, M. Pohl, P. B. Price, R. Heller, R. Nahnhauer, S. B\\\"oser, S. Hundertmark","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-08-15T19:10:41Z","title":"Feasibility of acoustic neutrino detection in ice: First results from the South Pole Acoustic Test Setup (SPATS)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0708.2089","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":"sha256:32c93461b70feda7adeb4411024a70460be8160a303b95293c4a3b6bebf82288","target":"record","created_at":"2026-07-04T15:03:38Z","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":"618cd1697365a22f29297bd8eb6f70be34ede8928b3f76930bfec939b675bf73","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-15T19:10:41Z","title_canon_sha256":"e397ecdf00e3f10cc8773e0be35cdb68d6fc4125543d5c7f54934d4200c49f9b"},"schema_version":"1.0","source":{"id":"0708.2089","kind":"arxiv","version":1}},"canonical_sha256":"f5d629032e76aaab42d8ada749b93cd57664231dbc40cc78535c02554ddc499f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f5d629032e76aaab42d8ada749b93cd57664231dbc40cc78535c02554ddc499f","first_computed_at":"2026-07-04T15:03:38.730047Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:03:38.730047Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3MgiFOygKYElMCoYKuT2cXYZZbPzZ5v/1cs85UvcsJjVph02M9y5rQOQUAHtozk1XhcedACzmw7eSCw5D10zBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:03:38.730410Z","signed_message":"canonical_sha256_bytes"},"source_id":"0708.2089","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:32c93461b70feda7adeb4411024a70460be8160a303b95293c4a3b6bebf82288","sha256:6d8f64dbb7cb4e66a32cc73ff8a95ac5329cc5a42a19d3e78b1b20b0a4ac980b"],"state_sha256":"9a28782e5249d86c1a0e9115b1d78dea71d2500f52a3a3c809c31c3a2df31235"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"56vEl5wcECmtcWVtWYjRfzVc+ocihBBBEVO+TOAG5FPkBdVebK1KzRbE3dUW/zXljS5VJWI5m0Lx0x5Rm/D1Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T03:26:19.890355Z","bundle_sha256":"322124a7a5d22b5650d13a8753765a0205e53a8c7547341f54fdf6b447f2efa0"}}