{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:CDXP77LOPHR7HRYX7DKH5DBBAM","short_pith_number":"pith:CDXP77LO","canonical_record":{"source":{"id":"1510.02307","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-10-07T07:22:13Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"aeebc09e2950292de0d82de3bfc9f0b5c1ae85d462504e4a499a71853db668b8","abstract_canon_sha256":"c25ce49f064c01fbcf15321ef91a733600b17726affe53fe8f171290d50cba06"},"schema_version":"1.0"},"canonical_sha256":"10eefffd6e79e3f3c717f8d47e8c210338ee9dc58f7ffdcef8e66479fca335d3","source":{"kind":"arxiv","id":"1510.02307","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.02307","created_at":"2026-05-18T00:27:47Z"},{"alias_kind":"arxiv_version","alias_value":"1510.02307v1","created_at":"2026-05-18T00:27:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.02307","created_at":"2026-05-18T00:27:47Z"},{"alias_kind":"pith_short_12","alias_value":"CDXP77LOPHR7","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"CDXP77LOPHR7HRYX","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"CDXP77LO","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:CDXP77LOPHR7HRYX7DKH5DBBAM","target":"record","payload":{"canonical_record":{"source":{"id":"1510.02307","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-10-07T07:22:13Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"aeebc09e2950292de0d82de3bfc9f0b5c1ae85d462504e4a499a71853db668b8","abstract_canon_sha256":"c25ce49f064c01fbcf15321ef91a733600b17726affe53fe8f171290d50cba06"},"schema_version":"1.0"},"canonical_sha256":"10eefffd6e79e3f3c717f8d47e8c210338ee9dc58f7ffdcef8e66479fca335d3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:47.338111Z","signature_b64":"m1yh0DXUoEwL6Jmp4p8jagYScBlouUl9Ea1TwLiBYt4OT04yND8bQqKjM8uXerNKY1lKMgwbr+V+fenApONTAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"10eefffd6e79e3f3c717f8d47e8c210338ee9dc58f7ffdcef8e66479fca335d3","last_reissued_at":"2026-05-18T00:27:47.337704Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:47.337704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.02307","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":"2026-05-18T00:27:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lro7bMgIdm8vBkCoLbzRTBqjgvBAwZQeM078+E1ynl4UEyhzUqjsYWuzpXjPZcnn+HrT2FKG04ttA4LB/AjTCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T13:35:36.960576Z"},"content_sha256":"93ee55743fe957164e79fba46a76fd17bb249a3cc25e2e084505d07415af6a90","schema_version":"1.0","event_id":"sha256:93ee55743fe957164e79fba46a76fd17bb249a3cc25e2e084505d07415af6a90"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:CDXP77LOPHR7HRYX7DKH5DBBAM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical and X-ray Variability of Blazars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"A. C. Gupta","submitted_at":"2015-10-07T07:22:13Z","abstract_excerpt":"Here we report our recent results of variability studies in optical and X-ray bands of three blazars namely 3C 273, PKS 2155 - 304 and BL Lacertae with XMM-Newton. We found large amplitude optical to X-rays variability in 3C 273, and PKS 2155 - 304 on year time scale. In 3C 273, we noticed that synchrotron cooling and particle acceleration are at work at different epoch of observations. In PKS 2155 - 304, spectral energy distribution from optical to X-ray is fitted with LPPL (log parabolic + power law) model. In BL Lacertae, optical flux and degree of polarization were anti-correlated."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.02307","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":"2026-05-18T00:27:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JLiASZyA+PYqYlJlYC9thdRI1t95Szx00mxCB9SP5tSW9pXCOz6SE9UXEdoCm5TBOedy+Gy+x7ncuLB6kvZuAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T13:35:36.960924Z"},"content_sha256":"12fb28bd059aa9ceb5cd8f8e0463a7c9bb70ed6803e905365c02ff69198b9224","schema_version":"1.0","event_id":"sha256:12fb28bd059aa9ceb5cd8f8e0463a7c9bb70ed6803e905365c02ff69198b9224"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CDXP77LOPHR7HRYX7DKH5DBBAM/bundle.json","state_url":"https://pith.science/pith/CDXP77LOPHR7HRYX7DKH5DBBAM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CDXP77LOPHR7HRYX7DKH5DBBAM/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":"2026-06-11T13:35:36Z","links":{"resolver":"https://pith.science/pith/CDXP77LOPHR7HRYX7DKH5DBBAM","bundle":"https://pith.science/pith/CDXP77LOPHR7HRYX7DKH5DBBAM/bundle.json","state":"https://pith.science/pith/CDXP77LOPHR7HRYX7DKH5DBBAM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CDXP77LOPHR7HRYX7DKH5DBBAM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:CDXP77LOPHR7HRYX7DKH5DBBAM","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":"c25ce49f064c01fbcf15321ef91a733600b17726affe53fe8f171290d50cba06","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-10-07T07:22:13Z","title_canon_sha256":"aeebc09e2950292de0d82de3bfc9f0b5c1ae85d462504e4a499a71853db668b8"},"schema_version":"1.0","source":{"id":"1510.02307","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.02307","created_at":"2026-05-18T00:27:47Z"},{"alias_kind":"arxiv_version","alias_value":"1510.02307v1","created_at":"2026-05-18T00:27:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.02307","created_at":"2026-05-18T00:27:47Z"},{"alias_kind":"pith_short_12","alias_value":"CDXP77LOPHR7","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"CDXP77LOPHR7HRYX","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"CDXP77LO","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:12fb28bd059aa9ceb5cd8f8e0463a7c9bb70ed6803e905365c02ff69198b9224","target":"graph","created_at":"2026-05-18T00:27:47Z","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":"Here we report our recent results of variability studies in optical and X-ray bands of three blazars namely 3C 273, PKS 2155 - 304 and BL Lacertae with XMM-Newton. We found large amplitude optical to X-rays variability in 3C 273, and PKS 2155 - 304 on year time scale. In 3C 273, we noticed that synchrotron cooling and particle acceleration are at work at different epoch of observations. In PKS 2155 - 304, spectral energy distribution from optical to X-ray is fitted with LPPL (log parabolic + power law) model. In BL Lacertae, optical flux and degree of polarization were anti-correlated.","authors_text":"A. C. Gupta","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-10-07T07:22:13Z","title":"Optical and X-ray Variability of Blazars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.02307","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":"sha256:93ee55743fe957164e79fba46a76fd17bb249a3cc25e2e084505d07415af6a90","target":"record","created_at":"2026-05-18T00:27:47Z","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":"c25ce49f064c01fbcf15321ef91a733600b17726affe53fe8f171290d50cba06","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-10-07T07:22:13Z","title_canon_sha256":"aeebc09e2950292de0d82de3bfc9f0b5c1ae85d462504e4a499a71853db668b8"},"schema_version":"1.0","source":{"id":"1510.02307","kind":"arxiv","version":1}},"canonical_sha256":"10eefffd6e79e3f3c717f8d47e8c210338ee9dc58f7ffdcef8e66479fca335d3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"10eefffd6e79e3f3c717f8d47e8c210338ee9dc58f7ffdcef8e66479fca335d3","first_computed_at":"2026-05-18T00:27:47.337704Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:47.337704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"m1yh0DXUoEwL6Jmp4p8jagYScBlouUl9Ea1TwLiBYt4OT04yND8bQqKjM8uXerNKY1lKMgwbr+V+fenApONTAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:47.338111Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.02307","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93ee55743fe957164e79fba46a76fd17bb249a3cc25e2e084505d07415af6a90","sha256:12fb28bd059aa9ceb5cd8f8e0463a7c9bb70ed6803e905365c02ff69198b9224"],"state_sha256":"7a5e9cd05549051fb31ac9b3c7aedf37f7efdfe472297f38eeb10d91205e7c3b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"30TTuZYyuJ9ELUjSFzStqEnWBlttugnZso79juToeATQHQQUFPwDm5SecVLHed1ATAf0yQC4iUtrwCKsSpcTBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T13:35:36.962906Z","bundle_sha256":"1a5147806deb1a9a453d4e0f96a2b4006b6f55bff91eec5fa36beddc72b03f45"}}