{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:U4MFOD5J3RA3DHVXHD7243JAFB","short_pith_number":"pith:U4MFOD5J","canonical_record":{"source":{"id":"1407.7615","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-07-29T02:06:25Z","cross_cats_sorted":[],"title_canon_sha256":"5d0fbd92efa8697ba9f18cbb1fa78e04e65bf443d634f0050773c6780965516c","abstract_canon_sha256":"eabec8ade70560a2529517012efb861cde4b648ba177a8c966a0884527eb3137"},"schema_version":"1.0"},"canonical_sha256":"a718570fa9dc41b19eb738ffae6d2028778813738cc66570d0f55a44b847f443","source":{"kind":"arxiv","id":"1407.7615","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.7615","created_at":"2026-05-18T00:56:51Z"},{"alias_kind":"arxiv_version","alias_value":"1407.7615v1","created_at":"2026-05-18T00:56:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.7615","created_at":"2026-05-18T00:56:51Z"},{"alias_kind":"pith_short_12","alias_value":"U4MFOD5J3RA3","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"U4MFOD5J3RA3DHVX","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"U4MFOD5J","created_at":"2026-05-18T12:28:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:U4MFOD5J3RA3DHVXHD7243JAFB","target":"record","payload":{"canonical_record":{"source":{"id":"1407.7615","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-07-29T02:06:25Z","cross_cats_sorted":[],"title_canon_sha256":"5d0fbd92efa8697ba9f18cbb1fa78e04e65bf443d634f0050773c6780965516c","abstract_canon_sha256":"eabec8ade70560a2529517012efb861cde4b648ba177a8c966a0884527eb3137"},"schema_version":"1.0"},"canonical_sha256":"a718570fa9dc41b19eb738ffae6d2028778813738cc66570d0f55a44b847f443","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:56:51.399152Z","signature_b64":"TiVnG+GQaV4Y1+0UGyYSV50cvNVbn1n/VSfRW03ucKl2j8jYlMShQIhQLUVx7XoTZ8OOxr7gQdSy9E5uH8QgBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a718570fa9dc41b19eb738ffae6d2028778813738cc66570d0f55a44b847f443","last_reissued_at":"2026-05-18T00:56:51.398600Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:56:51.398600Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.7615","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":"2026-05-18T00:56:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LK7X+rZ6oAM62rZd9VTlKBLY8zxeeLDkGr8f9XehmY2r0t6ap6YWQg1vtnSgYoSEMEjwFquTkijdio2+xbFEDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:22:30.467585Z"},"content_sha256":"bd4230f3a7e576076e7c8ba98e7920e46be5244b454abb5c96af64242f53d2bd","schema_version":"1.0","event_id":"sha256:bd4230f3a7e576076e7c8ba98e7920e46be5244b454abb5c96af64242f53d2bd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:U4MFOD5J3RA3DHVXHD7243JAFB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Optical View of BL Lacertae Objects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"(2) INAF-IASF Bologna, 3), (3) Scuola Normale Superiore di Pisa, (4) Univ. Insubria, 5) ((1) INAF-OA Padova, (5) INFN-Milano), Aldo Treves (4, Elena Pian (2, Renato Falomo (1)","submitted_at":"2014-07-29T02:06:25Z","abstract_excerpt":"BL Lac objects are active nuclei, hosted in massive elliptical galaxies, the emission of which is dominated by a relativistic jet closely aligned with the line of sight. This implies the existence of a parent population of sources with a misaligned jet, that have been identified with low-power radiogalaxies. The spectrum of BL Lacs, dominated by non-thermal emission over the whole electromagnetic range, together with bright compact radio cores, high luminosities, rapid and large amplitude flux variability at all frequencies and strong polarization make these sources an optimal laboratory for h"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.7615","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":"2026-05-18T00:56:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DAXxMFxGNkR3PODu/BcpkMu0EmbJQrmorQv3sW7rjaYfjjK7KiL+RY/jFSiM+spladINQno9yY+m+PdxbKeUAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:22:30.468252Z"},"content_sha256":"5cb25c9f1bca84aec23c15efea66c26c6188bd37e3da2340981fadc808e70c53","schema_version":"1.0","event_id":"sha256:5cb25c9f1bca84aec23c15efea66c26c6188bd37e3da2340981fadc808e70c53"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U4MFOD5J3RA3DHVXHD7243JAFB/bundle.json","state_url":"https://pith.science/pith/U4MFOD5J3RA3DHVXHD7243JAFB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U4MFOD5J3RA3DHVXHD7243JAFB/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":"2026-05-27T21:22:30Z","links":{"resolver":"https://pith.science/pith/U4MFOD5J3RA3DHVXHD7243JAFB","bundle":"https://pith.science/pith/U4MFOD5J3RA3DHVXHD7243JAFB/bundle.json","state":"https://pith.science/pith/U4MFOD5J3RA3DHVXHD7243JAFB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U4MFOD5J3RA3DHVXHD7243JAFB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:U4MFOD5J3RA3DHVXHD7243JAFB","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":"eabec8ade70560a2529517012efb861cde4b648ba177a8c966a0884527eb3137","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-07-29T02:06:25Z","title_canon_sha256":"5d0fbd92efa8697ba9f18cbb1fa78e04e65bf443d634f0050773c6780965516c"},"schema_version":"1.0","source":{"id":"1407.7615","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.7615","created_at":"2026-05-18T00:56:51Z"},{"alias_kind":"arxiv_version","alias_value":"1407.7615v1","created_at":"2026-05-18T00:56:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.7615","created_at":"2026-05-18T00:56:51Z"},{"alias_kind":"pith_short_12","alias_value":"U4MFOD5J3RA3","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"U4MFOD5J3RA3DHVX","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"U4MFOD5J","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:5cb25c9f1bca84aec23c15efea66c26c6188bd37e3da2340981fadc808e70c53","target":"graph","created_at":"2026-05-18T00:56:51Z","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":"BL Lac objects are active nuclei, hosted in massive elliptical galaxies, the emission of which is dominated by a relativistic jet closely aligned with the line of sight. This implies the existence of a parent population of sources with a misaligned jet, that have been identified with low-power radiogalaxies. The spectrum of BL Lacs, dominated by non-thermal emission over the whole electromagnetic range, together with bright compact radio cores, high luminosities, rapid and large amplitude flux variability at all frequencies and strong polarization make these sources an optimal laboratory for h","authors_text":"(2) INAF-IASF Bologna, 3), (3) Scuola Normale Superiore di Pisa, (4) Univ. Insubria, 5) ((1) INAF-OA Padova, (5) INFN-Milano), Aldo Treves (4, Elena Pian (2, Renato Falomo (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-07-29T02:06:25Z","title":"An Optical View of BL Lacertae Objects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.7615","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:bd4230f3a7e576076e7c8ba98e7920e46be5244b454abb5c96af64242f53d2bd","target":"record","created_at":"2026-05-18T00:56:51Z","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":"eabec8ade70560a2529517012efb861cde4b648ba177a8c966a0884527eb3137","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-07-29T02:06:25Z","title_canon_sha256":"5d0fbd92efa8697ba9f18cbb1fa78e04e65bf443d634f0050773c6780965516c"},"schema_version":"1.0","source":{"id":"1407.7615","kind":"arxiv","version":1}},"canonical_sha256":"a718570fa9dc41b19eb738ffae6d2028778813738cc66570d0f55a44b847f443","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a718570fa9dc41b19eb738ffae6d2028778813738cc66570d0f55a44b847f443","first_computed_at":"2026-05-18T00:56:51.398600Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:56:51.398600Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TiVnG+GQaV4Y1+0UGyYSV50cvNVbn1n/VSfRW03ucKl2j8jYlMShQIhQLUVx7XoTZ8OOxr7gQdSy9E5uH8QgBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:56:51.399152Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.7615","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd4230f3a7e576076e7c8ba98e7920e46be5244b454abb5c96af64242f53d2bd","sha256:5cb25c9f1bca84aec23c15efea66c26c6188bd37e3da2340981fadc808e70c53"],"state_sha256":"5bf16cc53f4cb9f6900cc2e4159fe8650f666ac5d21aa379abb59cc73014899d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9DBIGNH390eCjuKX5xYM0N+TTVo/BoZCjt/AjAwSGcZOrX2bb3uUGUlfmGoPaxX0Zu+HwKs+39NSOqZIxujOAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T21:22:30.471408Z","bundle_sha256":"11fd7d8be4a8387f29e31276b69fde0802e5e530a3042bb2e24a421297be2c21"}}