{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:XVZNYXTUBSGJ6G6Q5CTQYL32PD","short_pith_number":"pith:XVZNYXTU","canonical_record":{"source":{"id":"0810.2151","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-13T04:38:11Z","cross_cats_sorted":[],"title_canon_sha256":"cc6e175384338b95253b51708c2387e495d25b0ba0b8567773a335009e304728","abstract_canon_sha256":"576fe937db542310aeb9ae35ca53f3bf4a002ccad4f3b8ee577ff9ade6017b27"},"schema_version":"1.0"},"canonical_sha256":"bd72dc5e740c8c9f1bd0e8a70c2f7a78ff7d4df71ab3e6fd1d1530f8cc3811f0","source":{"kind":"arxiv","id":"0810.2151","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.2151","created_at":"2026-07-04T17:13:10Z"},{"alias_kind":"arxiv_version","alias_value":"0810.2151v1","created_at":"2026-07-04T17:13:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.2151","created_at":"2026-07-04T17:13:10Z"},{"alias_kind":"pith_short_12","alias_value":"XVZNYXTUBSGJ","created_at":"2026-07-04T17:13:10Z"},{"alias_kind":"pith_short_16","alias_value":"XVZNYXTUBSGJ6G6Q","created_at":"2026-07-04T17:13:10Z"},{"alias_kind":"pith_short_8","alias_value":"XVZNYXTU","created_at":"2026-07-04T17:13:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:XVZNYXTUBSGJ6G6Q5CTQYL32PD","target":"record","payload":{"canonical_record":{"source":{"id":"0810.2151","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-13T04:38:11Z","cross_cats_sorted":[],"title_canon_sha256":"cc6e175384338b95253b51708c2387e495d25b0ba0b8567773a335009e304728","abstract_canon_sha256":"576fe937db542310aeb9ae35ca53f3bf4a002ccad4f3b8ee577ff9ade6017b27"},"schema_version":"1.0"},"canonical_sha256":"bd72dc5e740c8c9f1bd0e8a70c2f7a78ff7d4df71ab3e6fd1d1530f8cc3811f0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:13:10.793550Z","signature_b64":"So7qinybp311xvez6qKlq4A8gXWv/voIxPEYN0i+V8WuP7nwtdCxNGSJd/DfmHTEpyFRdL1cK/jUMkKCxU3RCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd72dc5e740c8c9f1bd0e8a70c2f7a78ff7d4df71ab3e6fd1d1530f8cc3811f0","last_reissued_at":"2026-07-04T17:13:10.793087Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:13:10.793087Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0810.2151","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":"2026-07-04T17:13:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yJR/GIDJWFjPFIzHSF6cEYXBFP6RupPOqDhy3YO9T9d5OoRc555C85jvey4Wf99CMx/ZDjhZyfKtHWqTrAPMCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T15:45:00.729164Z"},"content_sha256":"dc428b9a37b46064226115930000f5f793328b06daba5c61545002b14672aa88","schema_version":"1.0","event_id":"sha256:dc428b9a37b46064226115930000f5f793328b06daba5c61545002b14672aa88"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:XVZNYXTUBSGJ6G6Q5CTQYL32PD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The implications from CANGAROO-III observations of TeV blazar PKS 2155-304","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J. Kushida, K. Nishijima, K. Saito (the CANGAROO-III Collaboration), Y. Sakamoto","submitted_at":"2008-10-13T04:38:11Z","abstract_excerpt":"We have observed the high-frequency-peaked BL Lacertae object PKS2155-304 in 2004, 2005 and 2006 with the CANGAROO-III imaging atmospheric Cherenkov telescope, and have detected a signal above 660 GeV at the 4.8/sigma level during the 2006 outburst period. Intranight flux variability on time scale of half an hour is observed. From this variability time scale, the size of the TeV gamma-ray emission region is restricted to 5x10^13\\delta cm, and the super massive black hole mass is estimated to be less than 1.9x10^8\\delta M_{Solar}, where \\delta is the beaming factor. The differential energy spec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.2151","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/0810.2151/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":"2026-07-04T17:13:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r5duAKRCeVOep2xVjiv/XRxePuZ10GuISbU4C3WEMHFbB72RWDdQl5CSrn8Td2+eu7MFLOYEi9EJVqCq6pcuDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T15:45:00.729661Z"},"content_sha256":"d5ef991c54a27f660e7369bc129759303573330a42d68c945b9534ad05136c35","schema_version":"1.0","event_id":"sha256:d5ef991c54a27f660e7369bc129759303573330a42d68c945b9534ad05136c35"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XVZNYXTUBSGJ6G6Q5CTQYL32PD/bundle.json","state_url":"https://pith.science/pith/XVZNYXTUBSGJ6G6Q5CTQYL32PD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XVZNYXTUBSGJ6G6Q5CTQYL32PD/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":"2026-08-14T15:45:00Z","links":{"resolver":"https://pith.science/pith/XVZNYXTUBSGJ6G6Q5CTQYL32PD","bundle":"https://pith.science/pith/XVZNYXTUBSGJ6G6Q5CTQYL32PD/bundle.json","state":"https://pith.science/pith/XVZNYXTUBSGJ6G6Q5CTQYL32PD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XVZNYXTUBSGJ6G6Q5CTQYL32PD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:XVZNYXTUBSGJ6G6Q5CTQYL32PD","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":"576fe937db542310aeb9ae35ca53f3bf4a002ccad4f3b8ee577ff9ade6017b27","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-13T04:38:11Z","title_canon_sha256":"cc6e175384338b95253b51708c2387e495d25b0ba0b8567773a335009e304728"},"schema_version":"1.0","source":{"id":"0810.2151","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.2151","created_at":"2026-07-04T17:13:10Z"},{"alias_kind":"arxiv_version","alias_value":"0810.2151v1","created_at":"2026-07-04T17:13:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.2151","created_at":"2026-07-04T17:13:10Z"},{"alias_kind":"pith_short_12","alias_value":"XVZNYXTUBSGJ","created_at":"2026-07-04T17:13:10Z"},{"alias_kind":"pith_short_16","alias_value":"XVZNYXTUBSGJ6G6Q","created_at":"2026-07-04T17:13:10Z"},{"alias_kind":"pith_short_8","alias_value":"XVZNYXTU","created_at":"2026-07-04T17:13:10Z"}],"graph_snapshots":[{"event_id":"sha256:d5ef991c54a27f660e7369bc129759303573330a42d68c945b9534ad05136c35","target":"graph","created_at":"2026-07-04T17:13:10Z","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/0810.2151/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have observed the high-frequency-peaked BL Lacertae object PKS2155-304 in 2004, 2005 and 2006 with the CANGAROO-III imaging atmospheric Cherenkov telescope, and have detected a signal above 660 GeV at the 4.8/sigma level during the 2006 outburst period. Intranight flux variability on time scale of half an hour is observed. From this variability time scale, the size of the TeV gamma-ray emission region is restricted to 5x10^13\\delta cm, and the super massive black hole mass is estimated to be less than 1.9x10^8\\delta M_{Solar}, where \\delta is the beaming factor. The differential energy spec","authors_text":"J. Kushida, K. Nishijima, K. Saito (the CANGAROO-III Collaboration), Y. Sakamoto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-13T04:38:11Z","title":"The implications from CANGAROO-III observations of TeV blazar PKS 2155-304"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.2151","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:dc428b9a37b46064226115930000f5f793328b06daba5c61545002b14672aa88","target":"record","created_at":"2026-07-04T17:13:10Z","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":"576fe937db542310aeb9ae35ca53f3bf4a002ccad4f3b8ee577ff9ade6017b27","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-13T04:38:11Z","title_canon_sha256":"cc6e175384338b95253b51708c2387e495d25b0ba0b8567773a335009e304728"},"schema_version":"1.0","source":{"id":"0810.2151","kind":"arxiv","version":1}},"canonical_sha256":"bd72dc5e740c8c9f1bd0e8a70c2f7a78ff7d4df71ab3e6fd1d1530f8cc3811f0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd72dc5e740c8c9f1bd0e8a70c2f7a78ff7d4df71ab3e6fd1d1530f8cc3811f0","first_computed_at":"2026-07-04T17:13:10.793087Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:13:10.793087Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"So7qinybp311xvez6qKlq4A8gXWv/voIxPEYN0i+V8WuP7nwtdCxNGSJd/DfmHTEpyFRdL1cK/jUMkKCxU3RCw==","signature_status":"signed_v1","signed_at":"2026-07-04T17:13:10.793550Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.2151","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc428b9a37b46064226115930000f5f793328b06daba5c61545002b14672aa88","sha256:d5ef991c54a27f660e7369bc129759303573330a42d68c945b9534ad05136c35"],"state_sha256":"da7bb2d64db26364bdef9c5bf6e9692ac8f7258f3737e486a85d15dfaee08cc9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DpuSO11PJJzciBz+Pyd4ty5J18ruphyjToHa9ovR4f+qtQl24nrNTZy/8XDTlpRgRjoE5aQ0LJkLmpxKYCzuBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T15:45:00.735280Z","bundle_sha256":"b234c2060fb50e3a0034b10cdc4a009aaddc2c8b3ff769ad97d360e4b104bf6b"}}