{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:HPFBOZXMJZEGWDDIWCOGZVEK3Q","short_pith_number":"pith:HPFBOZXM","canonical_record":{"source":{"id":"astro-ph/0407118","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-07-06T20:09:17Z","cross_cats_sorted":[],"title_canon_sha256":"76dfd10084c057e953c4aa95d8e441ad8c4073bb2ade04981033f040d97c214e","abstract_canon_sha256":"2ee1bbbc1473ef5235b2b778cd40b938f180247f4d3a1ee8e7616cb25ae49b79"},"schema_version":"1.0"},"canonical_sha256":"3bca1766ec4e486b0c68b09c6cd48adc3503407d34908cd1b168574131b60f1e","source":{"kind":"arxiv","id":"astro-ph/0407118","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0407118","created_at":"2026-07-04T17:20:29Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0407118v1","created_at":"2026-07-04T17:20:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0407118","created_at":"2026-07-04T17:20:29Z"},{"alias_kind":"pith_short_12","alias_value":"HPFBOZXMJZEG","created_at":"2026-07-04T17:20:29Z"},{"alias_kind":"pith_short_16","alias_value":"HPFBOZXMJZEGWDDI","created_at":"2026-07-04T17:20:29Z"},{"alias_kind":"pith_short_8","alias_value":"HPFBOZXM","created_at":"2026-07-04T17:20:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:HPFBOZXMJZEGWDDIWCOGZVEK3Q","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0407118","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-07-06T20:09:17Z","cross_cats_sorted":[],"title_canon_sha256":"76dfd10084c057e953c4aa95d8e441ad8c4073bb2ade04981033f040d97c214e","abstract_canon_sha256":"2ee1bbbc1473ef5235b2b778cd40b938f180247f4d3a1ee8e7616cb25ae49b79"},"schema_version":"1.0"},"canonical_sha256":"3bca1766ec4e486b0c68b09c6cd48adc3503407d34908cd1b168574131b60f1e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:20:29.501337Z","signature_b64":"79GYAs0YpDwZE63itjxCR6XAK0zxhebqJp+whR533H3HP0vPu9PPjTOxlMxVPXVYGhV6jFdEbm+CgFFzewWTCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3bca1766ec4e486b0c68b09c6cd48adc3503407d34908cd1b168574131b60f1e","last_reissued_at":"2026-07-04T17:20:29.500945Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:20:29.500945Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0407118","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":"2026-07-04T17:20:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d3Q8NWx2NzKZoW2rYvON85N6+ZtzgeRlBshYoNhHuv/Plr0uiTcCtxy+WeYqi1Pqba36XYywpsBSmpXgpzfSAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T10:38:46.928220Z"},"content_sha256":"b91a26202927bb8a255a6a699982a9af3fc006d21aee0fe5e408f3ddf27efea3","schema_version":"1.0","event_id":"sha256:b91a26202927bb8a255a6a699982a9af3fc006d21aee0fe5e408f3ddf27efea3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:HPFBOZXMJZEGWDDIWCOGZVEK3Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Crab Nebula and Pulsar between 500 GeV and 80 TeV: Observations with the HEGRA stereoscopic air Cherenkov telescopes","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"F. Aharonian et al. (HEGRA collaboration)","submitted_at":"2004-07-06T20:09:17Z","abstract_excerpt":"The Crab supernova remnant has been observed regularly with the stereoscopic system of 5 imaging air Cherenkov telescopes that was part of the High Energy Gamma Ray Astronomy (HEGRA) experiment. In total, close to 400 hours of useful data have been collected from 1997 until 2002. The spectrum extends up to energies of 80 TeV and is well matched by model calculations in the framework of inverse Compton scattering of various seed photons in the nebula including for the first time a recently detected compact emission region at mm-wavelengths. The observed indications for a gradual steepening of t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0407118","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/astro-ph/0407118/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":"2026-07-04T17:20:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m4B+RQEsfFNTRAlKpSNSIvnzz+JY5Mos5sqi+CSANV7VCZPX8owIfRutHuOyRgkJVYnzVEQe0oVDCOBlaHnaDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T10:38:46.928613Z"},"content_sha256":"a3f6aa92376449dd2b4a611dfedb96b86120d6d469b6d2f4651959e3657520ee","schema_version":"1.0","event_id":"sha256:a3f6aa92376449dd2b4a611dfedb96b86120d6d469b6d2f4651959e3657520ee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HPFBOZXMJZEGWDDIWCOGZVEK3Q/bundle.json","state_url":"https://pith.science/pith/HPFBOZXMJZEGWDDIWCOGZVEK3Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HPFBOZXMJZEGWDDIWCOGZVEK3Q/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":"2026-07-05T10:38:46Z","links":{"resolver":"https://pith.science/pith/HPFBOZXMJZEGWDDIWCOGZVEK3Q","bundle":"https://pith.science/pith/HPFBOZXMJZEGWDDIWCOGZVEK3Q/bundle.json","state":"https://pith.science/pith/HPFBOZXMJZEGWDDIWCOGZVEK3Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HPFBOZXMJZEGWDDIWCOGZVEK3Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:HPFBOZXMJZEGWDDIWCOGZVEK3Q","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":"2ee1bbbc1473ef5235b2b778cd40b938f180247f4d3a1ee8e7616cb25ae49b79","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-07-06T20:09:17Z","title_canon_sha256":"76dfd10084c057e953c4aa95d8e441ad8c4073bb2ade04981033f040d97c214e"},"schema_version":"1.0","source":{"id":"astro-ph/0407118","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0407118","created_at":"2026-07-04T17:20:29Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0407118v1","created_at":"2026-07-04T17:20:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0407118","created_at":"2026-07-04T17:20:29Z"},{"alias_kind":"pith_short_12","alias_value":"HPFBOZXMJZEG","created_at":"2026-07-04T17:20:29Z"},{"alias_kind":"pith_short_16","alias_value":"HPFBOZXMJZEGWDDI","created_at":"2026-07-04T17:20:29Z"},{"alias_kind":"pith_short_8","alias_value":"HPFBOZXM","created_at":"2026-07-04T17:20:29Z"}],"graph_snapshots":[{"event_id":"sha256:a3f6aa92376449dd2b4a611dfedb96b86120d6d469b6d2f4651959e3657520ee","target":"graph","created_at":"2026-07-04T17:20:29Z","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/astro-ph/0407118/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Crab supernova remnant has been observed regularly with the stereoscopic system of 5 imaging air Cherenkov telescopes that was part of the High Energy Gamma Ray Astronomy (HEGRA) experiment. In total, close to 400 hours of useful data have been collected from 1997 until 2002. The spectrum extends up to energies of 80 TeV and is well matched by model calculations in the framework of inverse Compton scattering of various seed photons in the nebula including for the first time a recently detected compact emission region at mm-wavelengths. The observed indications for a gradual steepening of t","authors_text":"F. Aharonian et al. (HEGRA collaboration)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-07-06T20:09:17Z","title":"The Crab Nebula and Pulsar between 500 GeV and 80 TeV: Observations with the HEGRA stereoscopic air Cherenkov telescopes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0407118","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:b91a26202927bb8a255a6a699982a9af3fc006d21aee0fe5e408f3ddf27efea3","target":"record","created_at":"2026-07-04T17:20:29Z","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":"2ee1bbbc1473ef5235b2b778cd40b938f180247f4d3a1ee8e7616cb25ae49b79","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-07-06T20:09:17Z","title_canon_sha256":"76dfd10084c057e953c4aa95d8e441ad8c4073bb2ade04981033f040d97c214e"},"schema_version":"1.0","source":{"id":"astro-ph/0407118","kind":"arxiv","version":1}},"canonical_sha256":"3bca1766ec4e486b0c68b09c6cd48adc3503407d34908cd1b168574131b60f1e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3bca1766ec4e486b0c68b09c6cd48adc3503407d34908cd1b168574131b60f1e","first_computed_at":"2026-07-04T17:20:29.500945Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:20:29.500945Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"79GYAs0YpDwZE63itjxCR6XAK0zxhebqJp+whR533H3HP0vPu9PPjTOxlMxVPXVYGhV6jFdEbm+CgFFzewWTCQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:20:29.501337Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0407118","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b91a26202927bb8a255a6a699982a9af3fc006d21aee0fe5e408f3ddf27efea3","sha256:a3f6aa92376449dd2b4a611dfedb96b86120d6d469b6d2f4651959e3657520ee"],"state_sha256":"13c58d9b94201a1ee7bbc93a98faef28c21c5930875c2e7996e569210778e1f6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fB2oEHm+ZCI4KwsknKDxMLmmSO+LcetCBKKdWekCeLucA2+IWON/hvubm0JJM0dKdJDAG//T9mtdsq4LoyjVCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T10:38:46.930720Z","bundle_sha256":"e68a2a50fefb0c1cab536a04318ab4e9b3b9f8a779acda1c557acd99d5b7ab5a"}}