{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:HGJHPWPCGUPCZFP5FSAW34PDJR","short_pith_number":"pith:HGJHPWPC","canonical_record":{"source":{"id":"0809.3625","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-22T03:01:42Z","cross_cats_sorted":[],"title_canon_sha256":"67d63bbea0eac1e34c60a196dc1d9dd4eb0ce004baa6b897ab3b2f6482476b37","abstract_canon_sha256":"d08c54e11f83aa3f39d1051e6df5943c59df364813b4b0d501bdd67a5ba1b96b"},"schema_version":"1.0"},"canonical_sha256":"399277d9e2351e2c95fd2c816df1e34c40941ed355720eb39b2e1a2012515108","source":{"kind":"arxiv","id":"0809.3625","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0809.3625","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"arxiv_version","alias_value":"0809.3625v1","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.3625","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"pith_short_12","alias_value":"HGJHPWPCGUPC","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"HGJHPWPCGUPCZFP5","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"HGJHPWPC","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:HGJHPWPCGUPCZFP5FSAW34PDJR","target":"record","payload":{"canonical_record":{"source":{"id":"0809.3625","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-22T03:01:42Z","cross_cats_sorted":[],"title_canon_sha256":"67d63bbea0eac1e34c60a196dc1d9dd4eb0ce004baa6b897ab3b2f6482476b37","abstract_canon_sha256":"d08c54e11f83aa3f39d1051e6df5943c59df364813b4b0d501bdd67a5ba1b96b"},"schema_version":"1.0"},"canonical_sha256":"399277d9e2351e2c95fd2c816df1e34c40941ed355720eb39b2e1a2012515108","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:15:34.064091Z","signature_b64":"5QY2KT/hqJG4x9R1OgVMd+An0lc2GBh29LRwSYHKJ+lmNa/OCuL+uipl3r4lltyE2Spw9NywYJlqNtDwersoAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"399277d9e2351e2c95fd2c816df1e34c40941ed355720eb39b2e1a2012515108","last_reissued_at":"2026-05-18T02:15:34.063310Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:15:34.063310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0809.3625","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":"2026-05-18T02:15:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VENll27C/6L7YB22AB1lxyRHgmXQwvTbsr4VPSYiqxvMQcDaDEdtIb7ZUTTxxmc+ZxgxWkbMaR+W5+aJY4ImBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:14:01.875013Z"},"content_sha256":"83510a27b914bc31ccd1a4552ba6787757114a8efd961a1c1e1a1f9a0f20d9ea","schema_version":"1.0","event_id":"sha256:83510a27b914bc31ccd1a4552ba6787757114a8efd961a1c1e1a1f9a0f20d9ea"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:HGJHPWPCGUPCZFP5FSAW34PDJR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Recent Topics on Very High Energy Gamma-ray Astronomy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Masaki Mori (ICRR, University of Tokyo)","submitted_at":"2008-09-22T03:01:42Z","abstract_excerpt":"With the advent of imaging atmospheric Cherenkov telescopes in late 1980's, ground-based observation of TeV gamma-rays came into reality after struggling trials by pioneers for twenty years, and the number of gamma-ray sources detected at TeV energies has increased to be over seventy now. In this review, recent findings from ground-based very-high-energy gamma-ray observations are summarized (as of 2008 March), and up-to-date problems in this research field are presented."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.3625","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":""},"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":"2026-05-18T02:15:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uSeaZN72dPZH3uFoiU8iNf725iDZt/OzNKJJBPLN2ndTXVo9l/kymYgzQwZfLQ73HvlXSU2ClgV2GXBu4cq+Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:14:01.875361Z"},"content_sha256":"d47684285a551914037b6ac99900e08f0fe81cfd11cbb2487f3ea94a9c2b3ad3","schema_version":"1.0","event_id":"sha256:d47684285a551914037b6ac99900e08f0fe81cfd11cbb2487f3ea94a9c2b3ad3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HGJHPWPCGUPCZFP5FSAW34PDJR/bundle.json","state_url":"https://pith.science/pith/HGJHPWPCGUPCZFP5FSAW34PDJR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HGJHPWPCGUPCZFP5FSAW34PDJR/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":"2026-06-02T01:14:01Z","links":{"resolver":"https://pith.science/pith/HGJHPWPCGUPCZFP5FSAW34PDJR","bundle":"https://pith.science/pith/HGJHPWPCGUPCZFP5FSAW34PDJR/bundle.json","state":"https://pith.science/pith/HGJHPWPCGUPCZFP5FSAW34PDJR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HGJHPWPCGUPCZFP5FSAW34PDJR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:HGJHPWPCGUPCZFP5FSAW34PDJR","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":"d08c54e11f83aa3f39d1051e6df5943c59df364813b4b0d501bdd67a5ba1b96b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-22T03:01:42Z","title_canon_sha256":"67d63bbea0eac1e34c60a196dc1d9dd4eb0ce004baa6b897ab3b2f6482476b37"},"schema_version":"1.0","source":{"id":"0809.3625","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0809.3625","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"arxiv_version","alias_value":"0809.3625v1","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.3625","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"pith_short_12","alias_value":"HGJHPWPCGUPC","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"HGJHPWPCGUPCZFP5","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"HGJHPWPC","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:d47684285a551914037b6ac99900e08f0fe81cfd11cbb2487f3ea94a9c2b3ad3","target":"graph","created_at":"2026-05-18T02:15:34Z","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":"With the advent of imaging atmospheric Cherenkov telescopes in late 1980's, ground-based observation of TeV gamma-rays came into reality after struggling trials by pioneers for twenty years, and the number of gamma-ray sources detected at TeV energies has increased to be over seventy now. In this review, recent findings from ground-based very-high-energy gamma-ray observations are summarized (as of 2008 March), and up-to-date problems in this research field are presented.","authors_text":"Masaki Mori (ICRR, University of Tokyo)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-22T03:01:42Z","title":"Recent Topics on Very High Energy Gamma-ray Astronomy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.3625","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":"sha256:83510a27b914bc31ccd1a4552ba6787757114a8efd961a1c1e1a1f9a0f20d9ea","target":"record","created_at":"2026-05-18T02:15:34Z","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":"d08c54e11f83aa3f39d1051e6df5943c59df364813b4b0d501bdd67a5ba1b96b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-22T03:01:42Z","title_canon_sha256":"67d63bbea0eac1e34c60a196dc1d9dd4eb0ce004baa6b897ab3b2f6482476b37"},"schema_version":"1.0","source":{"id":"0809.3625","kind":"arxiv","version":1}},"canonical_sha256":"399277d9e2351e2c95fd2c816df1e34c40941ed355720eb39b2e1a2012515108","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"399277d9e2351e2c95fd2c816df1e34c40941ed355720eb39b2e1a2012515108","first_computed_at":"2026-05-18T02:15:34.063310Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:15:34.063310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5QY2KT/hqJG4x9R1OgVMd+An0lc2GBh29LRwSYHKJ+lmNa/OCuL+uipl3r4lltyE2Spw9NywYJlqNtDwersoAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:15:34.064091Z","signed_message":"canonical_sha256_bytes"},"source_id":"0809.3625","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:83510a27b914bc31ccd1a4552ba6787757114a8efd961a1c1e1a1f9a0f20d9ea","sha256:d47684285a551914037b6ac99900e08f0fe81cfd11cbb2487f3ea94a9c2b3ad3"],"state_sha256":"5258ebffbcf9e7ca0dbd84952e4e60fd7f1d02eaab04b11ffce04cb01cd75521"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P593nsu0GU46Vv8o7XwrQ1GSrPRfEW44RDwl12rm0puO90I3joXGbAD6sw48/v17VQ/wM0+0F5865sZHTHhxDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T01:14:01.877250Z","bundle_sha256":"78634694b4ea7513a59ab477d68a8cd934142756cfa254223d1644d5cfc21b79"}}