{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:M7S5VKBRIA7X2KWSAUSJJ3YF3O","short_pith_number":"pith:M7S5VKBR","canonical_record":{"source":{"id":"1602.08364","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-02-26T15:25:57Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"cdbe50d2a55a236e40250b00aa5391c11ad2cfe9d5ab949f866b99866e75effb","abstract_canon_sha256":"11fb5e096031f88fb18214b8d97717b7151696e544e87ee81dc08d2a0c4c620d"},"schema_version":"1.0"},"canonical_sha256":"67e5daa831403f7d2ad2052494ef05db8fbdd16fff2d0ae536032aae3e4edbc2","source":{"kind":"arxiv","id":"1602.08364","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.08364","created_at":"2026-05-18T01:16:40Z"},{"alias_kind":"arxiv_version","alias_value":"1602.08364v2","created_at":"2026-05-18T01:16:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.08364","created_at":"2026-05-18T01:16:40Z"},{"alias_kind":"pith_short_12","alias_value":"M7S5VKBRIA7X","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"M7S5VKBRIA7X2KWS","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"M7S5VKBR","created_at":"2026-05-18T12:30:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:M7S5VKBRIA7X2KWSAUSJJ3YF3O","target":"record","payload":{"canonical_record":{"source":{"id":"1602.08364","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-02-26T15:25:57Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"cdbe50d2a55a236e40250b00aa5391c11ad2cfe9d5ab949f866b99866e75effb","abstract_canon_sha256":"11fb5e096031f88fb18214b8d97717b7151696e544e87ee81dc08d2a0c4c620d"},"schema_version":"1.0"},"canonical_sha256":"67e5daa831403f7d2ad2052494ef05db8fbdd16fff2d0ae536032aae3e4edbc2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:40.404044Z","signature_b64":"3xAfhcAsFslOxrZlvNrQOOq31LIV8aT61LR3ATQQ40VghcchO33pHVo+Vwe6l8Y0cqAX+beFMdAOGGy+rOHtAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"67e5daa831403f7d2ad2052494ef05db8fbdd16fff2d0ae536032aae3e4edbc2","last_reissued_at":"2026-05-18T01:16:40.403388Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:40.403388Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.08364","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:16:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GFajPEYQWF2dKX9awqRBWrrluWx4icuHTsP5OP/z9ptshnMRjgla5vlH64W+WBNULZUI3AIt/r51jF5AWzh1Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T19:44:09.707045Z"},"content_sha256":"274bebbb79f4e58cac291ed3ff7cf781b8aa79b241648c0fae1f3e201c22f31f","schema_version":"1.0","event_id":"sha256:274bebbb79f4e58cac291ed3ff7cf781b8aa79b241648c0fae1f3e201c22f31f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:M7S5VKBRIA7X2KWSAUSJJ3YF3O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The BL-Lac gamma-ray blazar PKS 1424+240 associated with a group of galaxies at z=0.6010","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"A.C. Rovero, A. Pichel, C. Donzelli, H. Muriel","submitted_at":"2016-02-26T15:25:57Z","abstract_excerpt":"PKS 1424+240 is a BL-Lac blazar with unknown redshift that was detected at high-energy gamma rays by Fermi-LAT with a hard spectrum. At VHE, it was first detected by VERITAS and later confirmed by MAGIC. Its spectral energy distribution is highly attenuated at VHE gamma rays, which is coherent with distant sources. Several estimations enabled the redshift to be constrained to the range 0.6 < z < 1.3. These results place PKS 1424+240 in the very interesting condition of being probably the most distant blazar that has been detected at VHE. The ambiguity in the redshift is still large enough to p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.08364","kind":"arxiv","version":2},"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":"2026-05-18T01:16:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nw1Js7N+KX7TkIozDm2GXzdzAuVyKEnRVRdKsRbTwFpMJlSRNmnqhP7mn6VoMkMoC1Vkywmza3iDzy6wJjTIDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T19:44:09.707755Z"},"content_sha256":"ebccca50a6a097dfe1e155a03e01e088058a4eae89d387b1e2551b79678111d6","schema_version":"1.0","event_id":"sha256:ebccca50a6a097dfe1e155a03e01e088058a4eae89d387b1e2551b79678111d6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M7S5VKBRIA7X2KWSAUSJJ3YF3O/bundle.json","state_url":"https://pith.science/pith/M7S5VKBRIA7X2KWSAUSJJ3YF3O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M7S5VKBRIA7X2KWSAUSJJ3YF3O/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":"2026-06-09T19:44:09Z","links":{"resolver":"https://pith.science/pith/M7S5VKBRIA7X2KWSAUSJJ3YF3O","bundle":"https://pith.science/pith/M7S5VKBRIA7X2KWSAUSJJ3YF3O/bundle.json","state":"https://pith.science/pith/M7S5VKBRIA7X2KWSAUSJJ3YF3O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M7S5VKBRIA7X2KWSAUSJJ3YF3O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:M7S5VKBRIA7X2KWSAUSJJ3YF3O","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":"11fb5e096031f88fb18214b8d97717b7151696e544e87ee81dc08d2a0c4c620d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-02-26T15:25:57Z","title_canon_sha256":"cdbe50d2a55a236e40250b00aa5391c11ad2cfe9d5ab949f866b99866e75effb"},"schema_version":"1.0","source":{"id":"1602.08364","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.08364","created_at":"2026-05-18T01:16:40Z"},{"alias_kind":"arxiv_version","alias_value":"1602.08364v2","created_at":"2026-05-18T01:16:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.08364","created_at":"2026-05-18T01:16:40Z"},{"alias_kind":"pith_short_12","alias_value":"M7S5VKBRIA7X","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"M7S5VKBRIA7X2KWS","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"M7S5VKBR","created_at":"2026-05-18T12:30:29Z"}],"graph_snapshots":[{"event_id":"sha256:ebccca50a6a097dfe1e155a03e01e088058a4eae89d387b1e2551b79678111d6","target":"graph","created_at":"2026-05-18T01:16:40Z","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":"PKS 1424+240 is a BL-Lac blazar with unknown redshift that was detected at high-energy gamma rays by Fermi-LAT with a hard spectrum. At VHE, it was first detected by VERITAS and later confirmed by MAGIC. Its spectral energy distribution is highly attenuated at VHE gamma rays, which is coherent with distant sources. Several estimations enabled the redshift to be constrained to the range 0.6 < z < 1.3. These results place PKS 1424+240 in the very interesting condition of being probably the most distant blazar that has been detected at VHE. The ambiguity in the redshift is still large enough to p","authors_text":"A.C. Rovero, A. Pichel, C. Donzelli, H. Muriel","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-02-26T15:25:57Z","title":"The BL-Lac gamma-ray blazar PKS 1424+240 associated with a group of galaxies at z=0.6010"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.08364","kind":"arxiv","version":2},"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":"sha256:274bebbb79f4e58cac291ed3ff7cf781b8aa79b241648c0fae1f3e201c22f31f","target":"record","created_at":"2026-05-18T01:16:40Z","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":"11fb5e096031f88fb18214b8d97717b7151696e544e87ee81dc08d2a0c4c620d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-02-26T15:25:57Z","title_canon_sha256":"cdbe50d2a55a236e40250b00aa5391c11ad2cfe9d5ab949f866b99866e75effb"},"schema_version":"1.0","source":{"id":"1602.08364","kind":"arxiv","version":2}},"canonical_sha256":"67e5daa831403f7d2ad2052494ef05db8fbdd16fff2d0ae536032aae3e4edbc2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"67e5daa831403f7d2ad2052494ef05db8fbdd16fff2d0ae536032aae3e4edbc2","first_computed_at":"2026-05-18T01:16:40.403388Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:40.403388Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3xAfhcAsFslOxrZlvNrQOOq31LIV8aT61LR3ATQQ40VghcchO33pHVo+Vwe6l8Y0cqAX+beFMdAOGGy+rOHtAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:40.404044Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.08364","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:274bebbb79f4e58cac291ed3ff7cf781b8aa79b241648c0fae1f3e201c22f31f","sha256:ebccca50a6a097dfe1e155a03e01e088058a4eae89d387b1e2551b79678111d6"],"state_sha256":"31dc08c2287b633851b9ab15108ef2f4db5bcb8349e96797a8aba0cab6e9c089"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NBHxXXBU3FbR/2ffSU1wm2ijf61t/B7NInZupxcboX6uvB+eMV0pIVqB8yq8SRpiUKFlaNWjYldKV2obolfDDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T19:44:09.711739Z","bundle_sha256":"9cfa2daf9f3cfd233d956522638c62bf926e081963200865c7f263e21c7a6882"}}