{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:2QIXVIHLJL7BYVP3CPNVZCSAYB","short_pith_number":"pith:2QIXVIHL","canonical_record":{"source":{"id":"1504.03020","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-04-12T21:02:11Z","cross_cats_sorted":[],"title_canon_sha256":"c96f24f5880a83970e88ba7bb5cb0b17c1ee704302b0ef87a8827f9e1ce147e2","abstract_canon_sha256":"4817abdbc93b0529b04b9de9acc6f63e8cb447eee886212f29e133d5e84cfb9a"},"schema_version":"1.0"},"canonical_sha256":"d4117aa0eb4afe1c55fb13db5c8a40c04b031d6604cfaf0cbf8176a24550c434","source":{"kind":"arxiv","id":"1504.03020","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.03020","created_at":"2026-05-18T01:55:41Z"},{"alias_kind":"arxiv_version","alias_value":"1504.03020v1","created_at":"2026-05-18T01:55:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.03020","created_at":"2026-05-18T01:55:41Z"},{"alias_kind":"pith_short_12","alias_value":"2QIXVIHLJL7B","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"2QIXVIHLJL7BYVP3","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"2QIXVIHL","created_at":"2026-05-18T12:29:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:2QIXVIHLJL7BYVP3CPNVZCSAYB","target":"record","payload":{"canonical_record":{"source":{"id":"1504.03020","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-04-12T21:02:11Z","cross_cats_sorted":[],"title_canon_sha256":"c96f24f5880a83970e88ba7bb5cb0b17c1ee704302b0ef87a8827f9e1ce147e2","abstract_canon_sha256":"4817abdbc93b0529b04b9de9acc6f63e8cb447eee886212f29e133d5e84cfb9a"},"schema_version":"1.0"},"canonical_sha256":"d4117aa0eb4afe1c55fb13db5c8a40c04b031d6604cfaf0cbf8176a24550c434","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:55:41.622829Z","signature_b64":"r4sjtfSReDcYCdgFXDwMtI26ZIXnkGdzl+4l5DfEyBOrOQP0f8qZmW8KGT8fOzJX1Nw5ovKb70OBxNMCCrSmBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d4117aa0eb4afe1c55fb13db5c8a40c04b031d6604cfaf0cbf8176a24550c434","last_reissued_at":"2026-05-18T01:55:41.622242Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:55:41.622242Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.03020","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":"2026-05-18T01:55:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bAFxuikwcOwaPvpT/mnRm4MQRRvvYdzsUX2LoBM1QbsH15vEQDcTkRRa8VYDf3n71aVRSl4oU7cB9J9a5zr2Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:38:08.660994Z"},"content_sha256":"4cb9271e01106ff8bec115b23d9afbd07c5639591edb3d7bb5a5faabb4064787","schema_version":"1.0","event_id":"sha256:4cb9271e01106ff8bec115b23d9afbd07c5639591edb3d7bb5a5faabb4064787"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:2QIXVIHLJL7BYVP3CPNVZCSAYB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Short Timescale Photometric and Polarimetric Behavior of two BL Lacertae Type Objects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Sandrinelli, A. Stamerra, A. Treves, C.M. Raiteri, E. Lindfors, E. Molinari, E. Prandini, F. D'Ammando, F. Leone, F. Tavecchio, G. Bonnoli, G. Tagliaferri, H. Zhang, L. Di Fabrizio, L. Foschini, M. Boettcher, M.C. Baglio, M. Cecconi, M. Giarrusso, S. Covino, S. Paiano, U. Barres de Almeida, V. Lorenzi","submitted_at":"2015-04-12T21:02:11Z","abstract_excerpt":"Blazars are astrophysical sources whose emission is dominated by non-thermal processes, typically interpreted as synchrotron and inverse Compton emission. Although the general picture is rather robust and consistent with observations, many aspects are still unexplored. Polarimetric monitoring can offer a wealth of information about the physical processes in blazars. Models with largely different physical ingredients can often provide almost indistinguishable predictions for the total flux, but usually are characterized by markedly different polarization properties. We explore, with a pilot stu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.03020","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":"2026-05-18T01:55:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F2o6vuN9wgAHMuKJtffl2ORMoMCg4VF8lBgUSROuelRYPYhfaBC3pTmjcbB8JSTwKbX5+Odre3CGUASoe9drBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:38:08.661666Z"},"content_sha256":"dab7c93e5a0030298fc489e4f70b53c0e0e693e7d067030961eaac979aa4cae2","schema_version":"1.0","event_id":"sha256:dab7c93e5a0030298fc489e4f70b53c0e0e693e7d067030961eaac979aa4cae2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2QIXVIHLJL7BYVP3CPNVZCSAYB/bundle.json","state_url":"https://pith.science/pith/2QIXVIHLJL7BYVP3CPNVZCSAYB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2QIXVIHLJL7BYVP3CPNVZCSAYB/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":"2026-05-27T12:38:08Z","links":{"resolver":"https://pith.science/pith/2QIXVIHLJL7BYVP3CPNVZCSAYB","bundle":"https://pith.science/pith/2QIXVIHLJL7BYVP3CPNVZCSAYB/bundle.json","state":"https://pith.science/pith/2QIXVIHLJL7BYVP3CPNVZCSAYB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2QIXVIHLJL7BYVP3CPNVZCSAYB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:2QIXVIHLJL7BYVP3CPNVZCSAYB","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":"4817abdbc93b0529b04b9de9acc6f63e8cb447eee886212f29e133d5e84cfb9a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-04-12T21:02:11Z","title_canon_sha256":"c96f24f5880a83970e88ba7bb5cb0b17c1ee704302b0ef87a8827f9e1ce147e2"},"schema_version":"1.0","source":{"id":"1504.03020","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.03020","created_at":"2026-05-18T01:55:41Z"},{"alias_kind":"arxiv_version","alias_value":"1504.03020v1","created_at":"2026-05-18T01:55:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.03020","created_at":"2026-05-18T01:55:41Z"},{"alias_kind":"pith_short_12","alias_value":"2QIXVIHLJL7B","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"2QIXVIHLJL7BYVP3","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"2QIXVIHL","created_at":"2026-05-18T12:29:02Z"}],"graph_snapshots":[{"event_id":"sha256:dab7c93e5a0030298fc489e4f70b53c0e0e693e7d067030961eaac979aa4cae2","target":"graph","created_at":"2026-05-18T01:55:41Z","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":"Blazars are astrophysical sources whose emission is dominated by non-thermal processes, typically interpreted as synchrotron and inverse Compton emission. Although the general picture is rather robust and consistent with observations, many aspects are still unexplored. Polarimetric monitoring can offer a wealth of information about the physical processes in blazars. Models with largely different physical ingredients can often provide almost indistinguishable predictions for the total flux, but usually are characterized by markedly different polarization properties. We explore, with a pilot stu","authors_text":"A. Sandrinelli, A. Stamerra, A. Treves, C.M. Raiteri, E. Lindfors, E. Molinari, E. Prandini, F. D'Ammando, F. Leone, F. Tavecchio, G. Bonnoli, G. Tagliaferri, H. Zhang, L. Di Fabrizio, L. Foschini, M. Boettcher, M.C. Baglio, M. Cecconi, M. Giarrusso, S. Covino, S. Paiano, U. Barres de Almeida, V. Lorenzi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-04-12T21:02:11Z","title":"Short Timescale Photometric and Polarimetric Behavior of two BL Lacertae Type Objects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.03020","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":"sha256:4cb9271e01106ff8bec115b23d9afbd07c5639591edb3d7bb5a5faabb4064787","target":"record","created_at":"2026-05-18T01:55:41Z","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":"4817abdbc93b0529b04b9de9acc6f63e8cb447eee886212f29e133d5e84cfb9a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-04-12T21:02:11Z","title_canon_sha256":"c96f24f5880a83970e88ba7bb5cb0b17c1ee704302b0ef87a8827f9e1ce147e2"},"schema_version":"1.0","source":{"id":"1504.03020","kind":"arxiv","version":1}},"canonical_sha256":"d4117aa0eb4afe1c55fb13db5c8a40c04b031d6604cfaf0cbf8176a24550c434","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d4117aa0eb4afe1c55fb13db5c8a40c04b031d6604cfaf0cbf8176a24550c434","first_computed_at":"2026-05-18T01:55:41.622242Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:41.622242Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"r4sjtfSReDcYCdgFXDwMtI26ZIXnkGdzl+4l5DfEyBOrOQP0f8qZmW8KGT8fOzJX1Nw5ovKb70OBxNMCCrSmBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:41.622829Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.03020","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4cb9271e01106ff8bec115b23d9afbd07c5639591edb3d7bb5a5faabb4064787","sha256:dab7c93e5a0030298fc489e4f70b53c0e0e693e7d067030961eaac979aa4cae2"],"state_sha256":"4125a95f4c311a9ce172f1781279e4fa499d28d01acd097ac1799b0869e91022"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+hViXZ88MuFnz0ASgJqvmwh2DfHkj/fMNyr8IIc33ebYK3i3zBU+O89ftyc5RsPY08TwFNaq2x10CNMrhqgHAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T12:38:08.665513Z","bundle_sha256":"ee4c8df4c53f192855af87adf11edb1faff0d62d2020834b51d4b0951d6b20d7"}}