{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:HEWZMUTXKPT7KFK267PTBEFHXD","short_pith_number":"pith:HEWZMUTX","canonical_record":{"source":{"id":"1707.04196","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-07-13T16:13:36Z","cross_cats_sorted":[],"title_canon_sha256":"d5b816d019eb3cbdfd3e5388845edc98a69314680294542b31abb4492112e687","abstract_canon_sha256":"af077c7305a6650cc3ac6f8378f7cd07ea4cab6cf3c28605c9dba5009ac257c0"},"schema_version":"1.0"},"canonical_sha256":"392d96527753e7f5155af7df3090a7b8e5d76c547630dce057c3821e0e879b1c","source":{"kind":"arxiv","id":"1707.04196","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.04196","created_at":"2026-07-04T23:55:05Z"},{"alias_kind":"arxiv_version","alias_value":"1707.04196v1","created_at":"2026-07-04T23:55:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.04196","created_at":"2026-07-04T23:55:05Z"},{"alias_kind":"pith_short_12","alias_value":"HEWZMUTXKPT7","created_at":"2026-07-04T23:55:05Z"},{"alias_kind":"pith_short_16","alias_value":"HEWZMUTXKPT7KFK2","created_at":"2026-07-04T23:55:05Z"},{"alias_kind":"pith_short_8","alias_value":"HEWZMUTX","created_at":"2026-07-04T23:55:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:HEWZMUTXKPT7KFK267PTBEFHXD","target":"record","payload":{"canonical_record":{"source":{"id":"1707.04196","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-07-13T16:13:36Z","cross_cats_sorted":[],"title_canon_sha256":"d5b816d019eb3cbdfd3e5388845edc98a69314680294542b31abb4492112e687","abstract_canon_sha256":"af077c7305a6650cc3ac6f8378f7cd07ea4cab6cf3c28605c9dba5009ac257c0"},"schema_version":"1.0"},"canonical_sha256":"392d96527753e7f5155af7df3090a7b8e5d76c547630dce057c3821e0e879b1c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:55:05.842761Z","signature_b64":"GPpzAQRql+gDlmJTJLK7B5iGDjeMwOYqF+E6QWFcWhgv+/F0UUDhmgqT1MHYsQ97Ef7D0TZrVS1Bv2xZ8SSQBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"392d96527753e7f5155af7df3090a7b8e5d76c547630dce057c3821e0e879b1c","last_reissued_at":"2026-07-04T23:55:05.842265Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:55:05.842265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.04196","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":"2026-07-04T23:55:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SJKiINP2q3yKGTQowhZRxaYvWPze0XjTQPANpqKUStkmSRIDme+rxoJWCh4X2RLdMwuwqSUS6luLCyKcb9gKCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T21:25:31.876904Z"},"content_sha256":"41f7b8ce990cda4c01ea708472b9627dfe167c1990f7b3aa2e4d68d5db7cd3c0","schema_version":"1.0","event_id":"sha256:41f7b8ce990cda4c01ea708472b9627dfe167c1990f7b3aa2e4d68d5db7cd3c0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:HEWZMUTXKPT7KFK267PTBEFHXD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Advanced search for the extension of unresolved TeV sources with H.E.S.S.: First measurement of the extension of the Crab nebula at TeV energies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"D. Berge, D. Khangulyan, J. Hahn, M. Holler, R. D. Parsons (for the H.E.S.S. Collaboration)","submitted_at":"2017-07-13T16:13:36Z","abstract_excerpt":"The resolution power of current Imaging Atmospheric Cherenkov Telescopes is presently restricted to scales of a few arcminutes. In the very high-energy (VHE; E > 100 GeV) gamma-ray regime, the measurement of source sizes that are comparable to or smaller than the resolution of the instrument is usually limited by statistics and in particular by the uncertainties in the characterisation of the instrument Point Spread Function (PSF). The PSF varies strongly with observation and instrument conditions, demanding time-dependent simulations of these conditions. Employing such simulations, we substan"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.04196","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/1707.04196/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":"2026-07-04T23:55:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OTb1k3lXpCL1SRU9b6jaV24E8m1+FVsTs+/IDq60CodILfZLLwtPdV6GU7KjJrrQiVUzW1+P5SaqhGotlSBFAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T21:25:31.877690Z"},"content_sha256":"1de47b7d1fa2576e0a5a1028a953a3e7f860f204e32d2b29c3948bdf83baf218","schema_version":"1.0","event_id":"sha256:1de47b7d1fa2576e0a5a1028a953a3e7f860f204e32d2b29c3948bdf83baf218"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HEWZMUTXKPT7KFK267PTBEFHXD/bundle.json","state_url":"https://pith.science/pith/HEWZMUTXKPT7KFK267PTBEFHXD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HEWZMUTXKPT7KFK267PTBEFHXD/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":"2026-08-19T21:25:31Z","links":{"resolver":"https://pith.science/pith/HEWZMUTXKPT7KFK267PTBEFHXD","bundle":"https://pith.science/pith/HEWZMUTXKPT7KFK267PTBEFHXD/bundle.json","state":"https://pith.science/pith/HEWZMUTXKPT7KFK267PTBEFHXD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HEWZMUTXKPT7KFK267PTBEFHXD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:HEWZMUTXKPT7KFK267PTBEFHXD","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":"af077c7305a6650cc3ac6f8378f7cd07ea4cab6cf3c28605c9dba5009ac257c0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-07-13T16:13:36Z","title_canon_sha256":"d5b816d019eb3cbdfd3e5388845edc98a69314680294542b31abb4492112e687"},"schema_version":"1.0","source":{"id":"1707.04196","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.04196","created_at":"2026-07-04T23:55:05Z"},{"alias_kind":"arxiv_version","alias_value":"1707.04196v1","created_at":"2026-07-04T23:55:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.04196","created_at":"2026-07-04T23:55:05Z"},{"alias_kind":"pith_short_12","alias_value":"HEWZMUTXKPT7","created_at":"2026-07-04T23:55:05Z"},{"alias_kind":"pith_short_16","alias_value":"HEWZMUTXKPT7KFK2","created_at":"2026-07-04T23:55:05Z"},{"alias_kind":"pith_short_8","alias_value":"HEWZMUTX","created_at":"2026-07-04T23:55:05Z"}],"graph_snapshots":[{"event_id":"sha256:1de47b7d1fa2576e0a5a1028a953a3e7f860f204e32d2b29c3948bdf83baf218","target":"graph","created_at":"2026-07-04T23:55:05Z","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/1707.04196/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The resolution power of current Imaging Atmospheric Cherenkov Telescopes is presently restricted to scales of a few arcminutes. In the very high-energy (VHE; E > 100 GeV) gamma-ray regime, the measurement of source sizes that are comparable to or smaller than the resolution of the instrument is usually limited by statistics and in particular by the uncertainties in the characterisation of the instrument Point Spread Function (PSF). The PSF varies strongly with observation and instrument conditions, demanding time-dependent simulations of these conditions. Employing such simulations, we substan","authors_text":"D. Berge, D. Khangulyan, J. Hahn, M. Holler, R. D. Parsons (for the H.E.S.S. Collaboration)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-07-13T16:13:36Z","title":"Advanced search for the extension of unresolved TeV sources with H.E.S.S.: First measurement of the extension of the Crab nebula at TeV energies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.04196","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":"sha256:41f7b8ce990cda4c01ea708472b9627dfe167c1990f7b3aa2e4d68d5db7cd3c0","target":"record","created_at":"2026-07-04T23:55:05Z","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":"af077c7305a6650cc3ac6f8378f7cd07ea4cab6cf3c28605c9dba5009ac257c0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-07-13T16:13:36Z","title_canon_sha256":"d5b816d019eb3cbdfd3e5388845edc98a69314680294542b31abb4492112e687"},"schema_version":"1.0","source":{"id":"1707.04196","kind":"arxiv","version":1}},"canonical_sha256":"392d96527753e7f5155af7df3090a7b8e5d76c547630dce057c3821e0e879b1c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"392d96527753e7f5155af7df3090a7b8e5d76c547630dce057c3821e0e879b1c","first_computed_at":"2026-07-04T23:55:05.842265Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:55:05.842265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GPpzAQRql+gDlmJTJLK7B5iGDjeMwOYqF+E6QWFcWhgv+/F0UUDhmgqT1MHYsQ97Ef7D0TZrVS1Bv2xZ8SSQBg==","signature_status":"signed_v1","signed_at":"2026-07-04T23:55:05.842761Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.04196","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:41f7b8ce990cda4c01ea708472b9627dfe167c1990f7b3aa2e4d68d5db7cd3c0","sha256:1de47b7d1fa2576e0a5a1028a953a3e7f860f204e32d2b29c3948bdf83baf218"],"state_sha256":"c7f01299928fcf570a1cb17d632f4fc613ee9306b71d3bc65e6718d54f43caf8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sl2uZ0Jecuu5ZXw6kWi3vyK473/up/auqB0k+3MgV/T68jY9WhtJ1oEFsyvvhg6DeZQEefveV8y3SbLq72TFAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T21:25:31.886472Z","bundle_sha256":"360abf5295e53123011982f80f98c8155dc3df3b4a67b7b6e2005deaa1bee175"}}