{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:DEJDGN5AIPFHWATU7TXU4XYTM5","short_pith_number":"pith:DEJDGN5A","canonical_record":{"source":{"id":"1712.02515","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-12-07T07:15:22Z","cross_cats_sorted":[],"title_canon_sha256":"83f610d4e0091e6524adecaed65c4e48f281cdf4d2f06537181b622de95228d2","abstract_canon_sha256":"366004f0e3642ec88089f11e1721fabace4ca64e824c066187a9318a2324a9e7"},"schema_version":"1.0"},"canonical_sha256":"19123337a043ca7b0274fcef4e5f13677b7fe27ec5039b5b10e0fdd65034ca8d","source":{"kind":"arxiv","id":"1712.02515","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.02515","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"arxiv_version","alias_value":"1712.02515v1","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.02515","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"pith_short_12","alias_value":"DEJDGN5AIPFH","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_16","alias_value":"DEJDGN5AIPFHWATU","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_8","alias_value":"DEJDGN5A","created_at":"2026-05-18T12:31:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:DEJDGN5AIPFHWATU7TXU4XYTM5","target":"record","payload":{"canonical_record":{"source":{"id":"1712.02515","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-12-07T07:15:22Z","cross_cats_sorted":[],"title_canon_sha256":"83f610d4e0091e6524adecaed65c4e48f281cdf4d2f06537181b622de95228d2","abstract_canon_sha256":"366004f0e3642ec88089f11e1721fabace4ca64e824c066187a9318a2324a9e7"},"schema_version":"1.0"},"canonical_sha256":"19123337a043ca7b0274fcef4e5f13677b7fe27ec5039b5b10e0fdd65034ca8d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:41.380081Z","signature_b64":"hV5gOmqVHAPxCSD2ftjHP1Na+kf6j6MRG+dwhc89vajQvwqg0La3+92JK9VmhQwhdgX4/Qv1WZOf1wxcfsKlBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"19123337a043ca7b0274fcef4e5f13677b7fe27ec5039b5b10e0fdd65034ca8d","last_reissued_at":"2026-05-18T00:27:41.379389Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:41.379389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.02515","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":"2026-05-18T00:27:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MUgFNf22HjCk+DMvI38FaKn63yRYi3+IOs6XCaHcbGHWabBm4IvvLyg2KjTzhQ+Nq1mRH3hZxA0IFCuFKaVUCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T05:24:36.277142Z"},"content_sha256":"c440b2765123b2e80eb129f42d3522adc0978e04f5bde75cef5887dfbef1d431","schema_version":"1.0","event_id":"sha256:c440b2765123b2e80eb129f42d3522adc0978e04f5bde75cef5887dfbef1d431"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:DEJDGN5AIPFHWATU7TXU4XYTM5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multi-Band Intra-Night Optical Variability of BL Lacertae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alok C. Gupta, A. Strigachev, E. Semkov, Haritma Gaur, M. F. Gu, Paul J. Wiita, R. Bachev, S. Ibryamov","submitted_at":"2017-12-07T07:15:22Z","abstract_excerpt":"We monitored BL Lacertae frequently during 2014 - 2016 when it was generally in a high state. We searched for intra-day variability for 43 nights using quasi-simultaneous measurements in the B, V, R, and I bands (totaling 143 light curves); the typical sampling interval was about eight minutes. On hour-like timescales, BL Lac exhibited significant variations during 13 nights in various optical bands. Significant spectral variations are seen during most of these nights such that the optical spectrum becomes bluer when brighter. The amplitude of variability is usually greater for longer observat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.02515","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":"2026-05-18T00:27:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KBA9rUZRC9yEV1gVDeuBGzu/rrLJjfmPg6Gc3kxNqE7hO70aN+ukf+PSHCqzbdvVlWzjPoIiqlMUjofcs88VAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T05:24:36.277501Z"},"content_sha256":"1128fcfb51dbb832386955dc0133042e7e280b447ef5bbbdfee9961a6e53a88d","schema_version":"1.0","event_id":"sha256:1128fcfb51dbb832386955dc0133042e7e280b447ef5bbbdfee9961a6e53a88d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DEJDGN5AIPFHWATU7TXU4XYTM5/bundle.json","state_url":"https://pith.science/pith/DEJDGN5AIPFHWATU7TXU4XYTM5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DEJDGN5AIPFHWATU7TXU4XYTM5/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":"2026-06-02T05:24:36Z","links":{"resolver":"https://pith.science/pith/DEJDGN5AIPFHWATU7TXU4XYTM5","bundle":"https://pith.science/pith/DEJDGN5AIPFHWATU7TXU4XYTM5/bundle.json","state":"https://pith.science/pith/DEJDGN5AIPFHWATU7TXU4XYTM5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DEJDGN5AIPFHWATU7TXU4XYTM5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:DEJDGN5AIPFHWATU7TXU4XYTM5","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":"366004f0e3642ec88089f11e1721fabace4ca64e824c066187a9318a2324a9e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-12-07T07:15:22Z","title_canon_sha256":"83f610d4e0091e6524adecaed65c4e48f281cdf4d2f06537181b622de95228d2"},"schema_version":"1.0","source":{"id":"1712.02515","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.02515","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"arxiv_version","alias_value":"1712.02515v1","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.02515","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"pith_short_12","alias_value":"DEJDGN5AIPFH","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_16","alias_value":"DEJDGN5AIPFHWATU","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_8","alias_value":"DEJDGN5A","created_at":"2026-05-18T12:31:10Z"}],"graph_snapshots":[{"event_id":"sha256:1128fcfb51dbb832386955dc0133042e7e280b447ef5bbbdfee9961a6e53a88d","target":"graph","created_at":"2026-05-18T00:27:41Z","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":"We monitored BL Lacertae frequently during 2014 - 2016 when it was generally in a high state. We searched for intra-day variability for 43 nights using quasi-simultaneous measurements in the B, V, R, and I bands (totaling 143 light curves); the typical sampling interval was about eight minutes. On hour-like timescales, BL Lac exhibited significant variations during 13 nights in various optical bands. Significant spectral variations are seen during most of these nights such that the optical spectrum becomes bluer when brighter. The amplitude of variability is usually greater for longer observat","authors_text":"Alok C. Gupta, A. Strigachev, E. Semkov, Haritma Gaur, M. F. Gu, Paul J. Wiita, R. Bachev, S. Ibryamov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-12-07T07:15:22Z","title":"Multi-Band Intra-Night Optical Variability of BL Lacertae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.02515","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:c440b2765123b2e80eb129f42d3522adc0978e04f5bde75cef5887dfbef1d431","target":"record","created_at":"2026-05-18T00:27:41Z","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":"366004f0e3642ec88089f11e1721fabace4ca64e824c066187a9318a2324a9e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-12-07T07:15:22Z","title_canon_sha256":"83f610d4e0091e6524adecaed65c4e48f281cdf4d2f06537181b622de95228d2"},"schema_version":"1.0","source":{"id":"1712.02515","kind":"arxiv","version":1}},"canonical_sha256":"19123337a043ca7b0274fcef4e5f13677b7fe27ec5039b5b10e0fdd65034ca8d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"19123337a043ca7b0274fcef4e5f13677b7fe27ec5039b5b10e0fdd65034ca8d","first_computed_at":"2026-05-18T00:27:41.379389Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:41.379389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hV5gOmqVHAPxCSD2ftjHP1Na+kf6j6MRG+dwhc89vajQvwqg0La3+92JK9VmhQwhdgX4/Qv1WZOf1wxcfsKlBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:41.380081Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.02515","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c440b2765123b2e80eb129f42d3522adc0978e04f5bde75cef5887dfbef1d431","sha256:1128fcfb51dbb832386955dc0133042e7e280b447ef5bbbdfee9961a6e53a88d"],"state_sha256":"42e1de9d9e8cf8904121414694cd13442a9d6f010e5749c67d43b203a94630b3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yW/XdsG/Rj9X6CJZTv2uuHBvTNKocbFMsZqnjFgrYIZdETYz6iPU3DkKY93TyJiGGOnSjCaM8CRKeHBNFFC8Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T05:24:36.279326Z","bundle_sha256":"c5d70e4446ab56d65116e821c768542cacf5b9ba5d203ca73d5007e989d514df"}}