{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:PQEWDTYA4JU7K3EK4XBB24S4I5","short_pith_number":"pith:PQEWDTYA","canonical_record":{"source":{"id":"1711.04824","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-11-13T19:59:54Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"125ab7d5a6daf139e58974124941a0a88c96622d63c71ba5022e4cb5761bf4b7","abstract_canon_sha256":"3d897a8d0f99e3a9f897432b9eb101b94f308c151701710d4d7be90ed0ce0ff7"},"schema_version":"1.0"},"canonical_sha256":"7c0961cf00e269f56c8ae5c21d725c476af913b01b4a9fe26f2993ae70fc0312","source":{"kind":"arxiv","id":"1711.04824","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.04824","created_at":"2026-05-18T00:30:35Z"},{"alias_kind":"arxiv_version","alias_value":"1711.04824v1","created_at":"2026-05-18T00:30:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.04824","created_at":"2026-05-18T00:30:35Z"},{"alias_kind":"pith_short_12","alias_value":"PQEWDTYA4JU7","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PQEWDTYA4JU7K3EK","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PQEWDTYA","created_at":"2026-05-18T12:31:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:PQEWDTYA4JU7K3EK4XBB24S4I5","target":"record","payload":{"canonical_record":{"source":{"id":"1711.04824","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-11-13T19:59:54Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"125ab7d5a6daf139e58974124941a0a88c96622d63c71ba5022e4cb5761bf4b7","abstract_canon_sha256":"3d897a8d0f99e3a9f897432b9eb101b94f308c151701710d4d7be90ed0ce0ff7"},"schema_version":"1.0"},"canonical_sha256":"7c0961cf00e269f56c8ae5c21d725c476af913b01b4a9fe26f2993ae70fc0312","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:30:35.675549Z","signature_b64":"iOEDrxYZVSP+/C19zmlFPYOsaO6j80ps7MrYDY/d9SkDV4Yu0C0PSqNKJQ/nU+njVU37ZlQBE35D/SZGDyUiAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7c0961cf00e269f56c8ae5c21d725c476af913b01b4a9fe26f2993ae70fc0312","last_reissued_at":"2026-05-18T00:30:35.674845Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:30:35.674845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.04824","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":"2026-05-18T00:30:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kjHYWCCHH8OXN9GvNpgDHz+kX4gOGcDo2mdVkB4IL1UXtAw6TgKBKwd82o4PNvDN5bLTfMZA8XIKqQrsoGiBAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T18:37:10.074058Z"},"content_sha256":"a88ce9556706492c4ab2760d827f607d22cdec914824b35d62bbdf6a80204e85","schema_version":"1.0","event_id":"sha256:a88ce9556706492c4ab2760d827f607d22cdec914824b35d62bbdf6a80204e85"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:PQEWDTYA4JU7K3EK4XBB24S4I5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The dependence of optical polarisation of blazars on the synchrotron component peak frequency","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"Dmitry Blinov, Emmanouil Angelakis, Ioannis Myserlis, J. Anton Zensus, Markus B\\\"ottcher, Sebastian Kiehlmann, Talvikki Hovatta, Vassiliki Pavlidou","submitted_at":"2017-11-13T19:59:54Z","abstract_excerpt":"The RoboPol instrument and the relevant program was developed in order to conduct a systematic study of the optical polarisation variability of blazars. Driven by the discovery that long smooth rotations of the optical polarisation plane can be associated with the activity in other bands and especially in gamma rays, the program was meant to investigate the physical mechanisms causing them and quantify the optical polarisation behaviour in blazars. Over the first three nominal observing seasons (2013, 2014 and 2015) RoboPol detected 40 rotations in 24 blazars by observing a gamma-ray-loud and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.04824","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":"2026-05-18T00:30:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YP3xL06yn9kWN/a+Ytd36WYR6n18j8lESNMRGZ5pcyaH/QGHBFoCM43LwfgYsrR8e3p8kdHHYZpTh0WjH6plAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T18:37:10.074494Z"},"content_sha256":"4c5aeac1f9bda2486cefb95047fa27d38e1b3e5b58e4bfe13e0e4bb9ea7c1a5e","schema_version":"1.0","event_id":"sha256:4c5aeac1f9bda2486cefb95047fa27d38e1b3e5b58e4bfe13e0e4bb9ea7c1a5e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PQEWDTYA4JU7K3EK4XBB24S4I5/bundle.json","state_url":"https://pith.science/pith/PQEWDTYA4JU7K3EK4XBB24S4I5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PQEWDTYA4JU7K3EK4XBB24S4I5/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":"2026-08-06T18:37:10Z","links":{"resolver":"https://pith.science/pith/PQEWDTYA4JU7K3EK4XBB24S4I5","bundle":"https://pith.science/pith/PQEWDTYA4JU7K3EK4XBB24S4I5/bundle.json","state":"https://pith.science/pith/PQEWDTYA4JU7K3EK4XBB24S4I5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PQEWDTYA4JU7K3EK4XBB24S4I5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:PQEWDTYA4JU7K3EK4XBB24S4I5","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":"3d897a8d0f99e3a9f897432b9eb101b94f308c151701710d4d7be90ed0ce0ff7","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-11-13T19:59:54Z","title_canon_sha256":"125ab7d5a6daf139e58974124941a0a88c96622d63c71ba5022e4cb5761bf4b7"},"schema_version":"1.0","source":{"id":"1711.04824","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.04824","created_at":"2026-05-18T00:30:35Z"},{"alias_kind":"arxiv_version","alias_value":"1711.04824v1","created_at":"2026-05-18T00:30:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.04824","created_at":"2026-05-18T00:30:35Z"},{"alias_kind":"pith_short_12","alias_value":"PQEWDTYA4JU7","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PQEWDTYA4JU7K3EK","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PQEWDTYA","created_at":"2026-05-18T12:31:37Z"}],"graph_snapshots":[{"event_id":"sha256:4c5aeac1f9bda2486cefb95047fa27d38e1b3e5b58e4bfe13e0e4bb9ea7c1a5e","target":"graph","created_at":"2026-05-18T00:30:35Z","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":"The RoboPol instrument and the relevant program was developed in order to conduct a systematic study of the optical polarisation variability of blazars. Driven by the discovery that long smooth rotations of the optical polarisation plane can be associated with the activity in other bands and especially in gamma rays, the program was meant to investigate the physical mechanisms causing them and quantify the optical polarisation behaviour in blazars. Over the first three nominal observing seasons (2013, 2014 and 2015) RoboPol detected 40 rotations in 24 blazars by observing a gamma-ray-loud and ","authors_text":"Dmitry Blinov, Emmanouil Angelakis, Ioannis Myserlis, J. Anton Zensus, Markus B\\\"ottcher, Sebastian Kiehlmann, Talvikki Hovatta, Vassiliki Pavlidou","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-11-13T19:59:54Z","title":"The dependence of optical polarisation of blazars on the synchrotron component peak frequency"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.04824","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:a88ce9556706492c4ab2760d827f607d22cdec914824b35d62bbdf6a80204e85","target":"record","created_at":"2026-05-18T00:30:35Z","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":"3d897a8d0f99e3a9f897432b9eb101b94f308c151701710d4d7be90ed0ce0ff7","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-11-13T19:59:54Z","title_canon_sha256":"125ab7d5a6daf139e58974124941a0a88c96622d63c71ba5022e4cb5761bf4b7"},"schema_version":"1.0","source":{"id":"1711.04824","kind":"arxiv","version":1}},"canonical_sha256":"7c0961cf00e269f56c8ae5c21d725c476af913b01b4a9fe26f2993ae70fc0312","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7c0961cf00e269f56c8ae5c21d725c476af913b01b4a9fe26f2993ae70fc0312","first_computed_at":"2026-05-18T00:30:35.674845Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:30:35.674845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iOEDrxYZVSP+/C19zmlFPYOsaO6j80ps7MrYDY/d9SkDV4Yu0C0PSqNKJQ/nU+njVU37ZlQBE35D/SZGDyUiAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:30:35.675549Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.04824","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a88ce9556706492c4ab2760d827f607d22cdec914824b35d62bbdf6a80204e85","sha256:4c5aeac1f9bda2486cefb95047fa27d38e1b3e5b58e4bfe13e0e4bb9ea7c1a5e"],"state_sha256":"c0b23f509ce4c4633ac7a3963e130f763bed02b37c758297f05e01df19a7b64f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U6Gk9FRIwxnR8QEllS6hdQfSTJ3t7wkIGmG5isENPXg5CaVNIvctUk1uavft7IDHA1ChcmJagqocfJ9TAzTwCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T18:37:10.079187Z","bundle_sha256":"4d15b312900b5d3c62006aa33533eb597a243c8483e66ef54a63629e8b3b4da5"}}