{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:UJAWKTABYXTSOXHQDJZPDXOVIZ","short_pith_number":"pith:UJAWKTAB","canonical_record":{"source":{"id":"1611.07323","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-11-22T14:39:49Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"9607192727530b6a1df77ea3933939ce1b6988cd6b289ef9abe7aa2734f44e07","abstract_canon_sha256":"9f62650c9b063f8e4e2bf5f23d17eff4ce0e0497c737ca3407ad8c03aaa40972"},"schema_version":"1.0"},"canonical_sha256":"a241654c01c5e7275cf01a72f1ddd5466e3865f9772f4dc47550f9f05ecf9050","source":{"kind":"arxiv","id":"1611.07323","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.07323","created_at":"2026-05-18T00:57:24Z"},{"alias_kind":"arxiv_version","alias_value":"1611.07323v1","created_at":"2026-05-18T00:57:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.07323","created_at":"2026-05-18T00:57:24Z"},{"alias_kind":"pith_short_12","alias_value":"UJAWKTABYXTS","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"UJAWKTABYXTSOXHQ","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"UJAWKTAB","created_at":"2026-05-18T12:30:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:UJAWKTABYXTSOXHQDJZPDXOVIZ","target":"record","payload":{"canonical_record":{"source":{"id":"1611.07323","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-11-22T14:39:49Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"9607192727530b6a1df77ea3933939ce1b6988cd6b289ef9abe7aa2734f44e07","abstract_canon_sha256":"9f62650c9b063f8e4e2bf5f23d17eff4ce0e0497c737ca3407ad8c03aaa40972"},"schema_version":"1.0"},"canonical_sha256":"a241654c01c5e7275cf01a72f1ddd5466e3865f9772f4dc47550f9f05ecf9050","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:57:24.293468Z","signature_b64":"jg1uUhVC6pvV0rr5AqFHYyJqml31MyXcb6xz7bgMQP/XiW/zZxkaiYuAXkXKVrmC2BkQcyLWDRYsP0TASIACCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a241654c01c5e7275cf01a72f1ddd5466e3865f9772f4dc47550f9f05ecf9050","last_reissued_at":"2026-05-18T00:57:24.292966Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:57:24.292966Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.07323","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":"2026-05-18T00:57:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4O59i06f44t4TG5qbR+oyXiXskS2XPJkOWvyUizao6SIKrjN8WX4XrfPcpyVyXeIB5gQriwEt7y41tJM/3+/CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T12:59:53.459621Z"},"content_sha256":"ea2f61ab898e83f4a8bf2a1dc901fce87a16d376e50819441b5f99ac2b2ac200","schema_version":"1.0","event_id":"sha256:ea2f61ab898e83f4a8bf2a1dc901fce87a16d376e50819441b5f99ac2b2ac200"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:UJAWKTABYXTSOXHQDJZPDXOVIZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Robopol: Optical polarisation monitoring of blazars","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":"2016-11-22T14:39:49Z","abstract_excerpt":"The RoboPol program has been monitoring the $R$-band linear polarisation parameters of an unbiased sample of 60 gamma-ray-loud blazars and a \"control\" sample of 15 gamma-ray-quite ones. The prime drive for the program has been the systematic study of the temporal behaviour of the optical polarisation and particularly the potential association of smooth and long rotations of the polarisation angle with flaring activity at high energies. Here we present the program and discuss a list of selected topics from our studies of the first three observing seasons (2013--2015) both in the angle and in th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.07323","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":"2026-05-18T00:57:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2pPqSvZZ2QAylZZ6uMbY3b1qBlPvYOOG5RbHywSGSrJeh5ZKnvRL8r/RgQ7IIsktJwXblzJgnMRtY6Yss1g8CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T12:59:53.460258Z"},"content_sha256":"b36be38f92500379ffb8fc0ccb3f3942665cbe81eb1cf92427b59bfda8a88045","schema_version":"1.0","event_id":"sha256:b36be38f92500379ffb8fc0ccb3f3942665cbe81eb1cf92427b59bfda8a88045"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UJAWKTABYXTSOXHQDJZPDXOVIZ/bundle.json","state_url":"https://pith.science/pith/UJAWKTABYXTSOXHQDJZPDXOVIZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UJAWKTABYXTSOXHQDJZPDXOVIZ/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":"2026-05-30T12:59:53Z","links":{"resolver":"https://pith.science/pith/UJAWKTABYXTSOXHQDJZPDXOVIZ","bundle":"https://pith.science/pith/UJAWKTABYXTSOXHQDJZPDXOVIZ/bundle.json","state":"https://pith.science/pith/UJAWKTABYXTSOXHQDJZPDXOVIZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UJAWKTABYXTSOXHQDJZPDXOVIZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:UJAWKTABYXTSOXHQDJZPDXOVIZ","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":"9f62650c9b063f8e4e2bf5f23d17eff4ce0e0497c737ca3407ad8c03aaa40972","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-11-22T14:39:49Z","title_canon_sha256":"9607192727530b6a1df77ea3933939ce1b6988cd6b289ef9abe7aa2734f44e07"},"schema_version":"1.0","source":{"id":"1611.07323","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.07323","created_at":"2026-05-18T00:57:24Z"},{"alias_kind":"arxiv_version","alias_value":"1611.07323v1","created_at":"2026-05-18T00:57:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.07323","created_at":"2026-05-18T00:57:24Z"},{"alias_kind":"pith_short_12","alias_value":"UJAWKTABYXTS","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"UJAWKTABYXTSOXHQ","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"UJAWKTAB","created_at":"2026-05-18T12:30:46Z"}],"graph_snapshots":[{"event_id":"sha256:b36be38f92500379ffb8fc0ccb3f3942665cbe81eb1cf92427b59bfda8a88045","target":"graph","created_at":"2026-05-18T00:57:24Z","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 program has been monitoring the $R$-band linear polarisation parameters of an unbiased sample of 60 gamma-ray-loud blazars and a \"control\" sample of 15 gamma-ray-quite ones. The prime drive for the program has been the systematic study of the temporal behaviour of the optical polarisation and particularly the potential association of smooth and long rotations of the polarisation angle with flaring activity at high energies. Here we present the program and discuss a list of selected topics from our studies of the first three observing seasons (2013--2015) both in the angle and in th","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":"2016-11-22T14:39:49Z","title":"Robopol: Optical polarisation monitoring of blazars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.07323","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:ea2f61ab898e83f4a8bf2a1dc901fce87a16d376e50819441b5f99ac2b2ac200","target":"record","created_at":"2026-05-18T00:57:24Z","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":"9f62650c9b063f8e4e2bf5f23d17eff4ce0e0497c737ca3407ad8c03aaa40972","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-11-22T14:39:49Z","title_canon_sha256":"9607192727530b6a1df77ea3933939ce1b6988cd6b289ef9abe7aa2734f44e07"},"schema_version":"1.0","source":{"id":"1611.07323","kind":"arxiv","version":1}},"canonical_sha256":"a241654c01c5e7275cf01a72f1ddd5466e3865f9772f4dc47550f9f05ecf9050","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a241654c01c5e7275cf01a72f1ddd5466e3865f9772f4dc47550f9f05ecf9050","first_computed_at":"2026-05-18T00:57:24.292966Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:24.292966Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jg1uUhVC6pvV0rr5AqFHYyJqml31MyXcb6xz7bgMQP/XiW/zZxkaiYuAXkXKVrmC2BkQcyLWDRYsP0TASIACCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:24.293468Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.07323","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea2f61ab898e83f4a8bf2a1dc901fce87a16d376e50819441b5f99ac2b2ac200","sha256:b36be38f92500379ffb8fc0ccb3f3942665cbe81eb1cf92427b59bfda8a88045"],"state_sha256":"11d353b0f61814b0beec5e2a2fd747976f9ee7956c877641d74d9bd4ca0d7a93"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dFDphMOyKO8vcEISaQHtyvnJYZGEb+x0xQlTNDOK98AgfGKDsBDCLwcM3ngv31AjGJe9PonCrwkFqdogCQHiDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T12:59:53.463333Z","bundle_sha256":"1ba79ae80ec8149249419e4638547570042ba534178be16c6415725b0d05194c"}}