{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:WKCCUDODVBABIKVC7IKJJHZ35O","short_pith_number":"pith:WKCCUDOD","canonical_record":{"source":{"id":"astro-ph/0603478","kind":"arxiv","version":4},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-17T17:19:22Z","cross_cats_sorted":[],"title_canon_sha256":"cb75fb52865a799cee9b290eb117c0ad13b24809f3da2c8143838f25c2bd7295","abstract_canon_sha256":"87b8cc55e3502cf5e689b33d8a4a3a9c9388144d14768c32809fc6950f6cc2e0"},"schema_version":"1.0"},"canonical_sha256":"b2842a0dc3a840142aa2fa14949f3bebb1367252bb07655cbc8a05be97484a92","source":{"kind":"arxiv","id":"astro-ph/0603478","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0603478","created_at":"2026-07-04T15:22:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0603478v4","created_at":"2026-07-04T15:22:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0603478","created_at":"2026-07-04T15:22:18Z"},{"alias_kind":"pith_short_12","alias_value":"WKCCUDODVBAB","created_at":"2026-07-04T15:22:18Z"},{"alias_kind":"pith_short_16","alias_value":"WKCCUDODVBABIKVC","created_at":"2026-07-04T15:22:18Z"},{"alias_kind":"pith_short_8","alias_value":"WKCCUDOD","created_at":"2026-07-04T15:22:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:WKCCUDODVBABIKVC7IKJJHZ35O","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0603478","kind":"arxiv","version":4},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-17T17:19:22Z","cross_cats_sorted":[],"title_canon_sha256":"cb75fb52865a799cee9b290eb117c0ad13b24809f3da2c8143838f25c2bd7295","abstract_canon_sha256":"87b8cc55e3502cf5e689b33d8a4a3a9c9388144d14768c32809fc6950f6cc2e0"},"schema_version":"1.0"},"canonical_sha256":"b2842a0dc3a840142aa2fa14949f3bebb1367252bb07655cbc8a05be97484a92","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:22:18.499275Z","signature_b64":"MR9Ezzw9YwNxeQQIVVJWfw+6MgWXVlGQc3S5Om3HQOauNXu9OFAFcOl9d5WssBO07olWp8WX64ZwnIvahEo/Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b2842a0dc3a840142aa2fa14949f3bebb1367252bb07655cbc8a05be97484a92","last_reissued_at":"2026-07-04T15:22:18.498870Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:22:18.498870Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0603478","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:22:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0mL6Zc6ES6k4PmQCfaarj6pZ+zoWWm8Hzuvxmp+aINSXXoK0m7vcrXuc/V/SYaX9QeTBp9zqxev/7YzGw7HnAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T15:59:49.852268Z"},"content_sha256":"9e790fb5093062026dc50606c0eff62c52f85b861ad0d05b55a27ab98de4b146","schema_version":"1.0","event_id":"sha256:9e790fb5093062026dc50606c0eff62c52f85b861ad0d05b55a27ab98de4b146"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:WKCCUDODVBABIKVC7IKJJHZ35O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observations of Mkn 421 with the MAGIC Telescope","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J. Albert et al. (MAGIC Collaboration)","submitted_at":"2006-03-17T17:19:22Z","abstract_excerpt":"The MAGIC telescope took data of very high energy gamma-ray emission from the blazar Markarian 421 (Mkn 421) between November 2004 and April 2005. We present a combined analysis of data samples recorded under different observational conditions, down to gamma-ray energies of 100 GeV. The flux was found to vary between 0.5 -- 2 Crab units (integrated above 200 GeV), considered a low state when compared to known data. Although the flux varied on a day-by-day basis, no short-term variability was observed, although there is some indication that not all nights are in an equally quiescent state. The "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0603478","kind":"arxiv","version":4},"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/0603478/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":"2026-07-04T15:22:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"801QkCD38UVlYUElXyjkLLQhoZKamjdg7ngoj/ShUuyTXHLHedG+N1IfO7NzoJqzFEKp03vezz/s9oKJ8+IhBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T15:59:49.852807Z"},"content_sha256":"3f5020f33af20cc10c490cad0d64b8b69a0cdd51ca771668315e4645b19a5d3b","schema_version":"1.0","event_id":"sha256:3f5020f33af20cc10c490cad0d64b8b69a0cdd51ca771668315e4645b19a5d3b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WKCCUDODVBABIKVC7IKJJHZ35O/bundle.json","state_url":"https://pith.science/pith/WKCCUDODVBABIKVC7IKJJHZ35O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WKCCUDODVBABIKVC7IKJJHZ35O/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":"2026-08-07T15:59:49Z","links":{"resolver":"https://pith.science/pith/WKCCUDODVBABIKVC7IKJJHZ35O","bundle":"https://pith.science/pith/WKCCUDODVBABIKVC7IKJJHZ35O/bundle.json","state":"https://pith.science/pith/WKCCUDODVBABIKVC7IKJJHZ35O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WKCCUDODVBABIKVC7IKJJHZ35O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:WKCCUDODVBABIKVC7IKJJHZ35O","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":"87b8cc55e3502cf5e689b33d8a4a3a9c9388144d14768c32809fc6950f6cc2e0","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-17T17:19:22Z","title_canon_sha256":"cb75fb52865a799cee9b290eb117c0ad13b24809f3da2c8143838f25c2bd7295"},"schema_version":"1.0","source":{"id":"astro-ph/0603478","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0603478","created_at":"2026-07-04T15:22:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0603478v4","created_at":"2026-07-04T15:22:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0603478","created_at":"2026-07-04T15:22:18Z"},{"alias_kind":"pith_short_12","alias_value":"WKCCUDODVBAB","created_at":"2026-07-04T15:22:18Z"},{"alias_kind":"pith_short_16","alias_value":"WKCCUDODVBABIKVC","created_at":"2026-07-04T15:22:18Z"},{"alias_kind":"pith_short_8","alias_value":"WKCCUDOD","created_at":"2026-07-04T15:22:18Z"}],"graph_snapshots":[{"event_id":"sha256:3f5020f33af20cc10c490cad0d64b8b69a0cdd51ca771668315e4645b19a5d3b","target":"graph","created_at":"2026-07-04T15:22:18Z","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/0603478/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The MAGIC telescope took data of very high energy gamma-ray emission from the blazar Markarian 421 (Mkn 421) between November 2004 and April 2005. We present a combined analysis of data samples recorded under different observational conditions, down to gamma-ray energies of 100 GeV. The flux was found to vary between 0.5 -- 2 Crab units (integrated above 200 GeV), considered a low state when compared to known data. Although the flux varied on a day-by-day basis, no short-term variability was observed, although there is some indication that not all nights are in an equally quiescent state. The ","authors_text":"J. Albert et al. (MAGIC Collaboration)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-03-17T17:19:22Z","title":"Observations of Mkn 421 with the MAGIC Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0603478","kind":"arxiv","version":4},"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":"sha256:9e790fb5093062026dc50606c0eff62c52f85b861ad0d05b55a27ab98de4b146","target":"record","created_at":"2026-07-04T15:22:18Z","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":"87b8cc55e3502cf5e689b33d8a4a3a9c9388144d14768c32809fc6950f6cc2e0","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-17T17:19:22Z","title_canon_sha256":"cb75fb52865a799cee9b290eb117c0ad13b24809f3da2c8143838f25c2bd7295"},"schema_version":"1.0","source":{"id":"astro-ph/0603478","kind":"arxiv","version":4}},"canonical_sha256":"b2842a0dc3a840142aa2fa14949f3bebb1367252bb07655cbc8a05be97484a92","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b2842a0dc3a840142aa2fa14949f3bebb1367252bb07655cbc8a05be97484a92","first_computed_at":"2026-07-04T15:22:18.498870Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:22:18.498870Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MR9Ezzw9YwNxeQQIVVJWfw+6MgWXVlGQc3S5Om3HQOauNXu9OFAFcOl9d5WssBO07olWp8WX64ZwnIvahEo/Bg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:22:18.499275Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0603478","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e790fb5093062026dc50606c0eff62c52f85b861ad0d05b55a27ab98de4b146","sha256:3f5020f33af20cc10c490cad0d64b8b69a0cdd51ca771668315e4645b19a5d3b"],"state_sha256":"ac97ffd2bbaba89d08d3eedc9bbae190befdf4debd907aba5200a65c7e397a50"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wgTBkwioIr3xVmp2mtKAD85JyOTpUS9u9J/8bAHrUgl8RafA1APtFA3SZXkGJ4dPM36s1YqTyIRRpXX9qCG0Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T15:59:49.885451Z","bundle_sha256":"bac9f752bc802c9833704a81fb96b77e29708ce0547a6321918dc385a4ec3ff2"}}