{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:GALK2OAFK2DNRZYRKFRK24JZYR","short_pith_number":"pith:GALK2OAF","canonical_record":{"source":{"id":"1707.05624","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-07-18T14:05:20Z","cross_cats_sorted":[],"title_canon_sha256":"39d04f6a954cc29dd96e48be92eec9064ec8464fb99ee3dcc679495128f68852","abstract_canon_sha256":"380c079afc529e3670fe3e27522e26767c72d2b18d7687ae19cd056162d77c38"},"schema_version":"1.0"},"canonical_sha256":"3016ad38055686d8e7115162ad7139c447d85263a987e03450f6b70e94950c4e","source":{"kind":"arxiv","id":"1707.05624","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.05624","created_at":"2026-05-18T00:36:02Z"},{"alias_kind":"arxiv_version","alias_value":"1707.05624v1","created_at":"2026-05-18T00:36:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.05624","created_at":"2026-05-18T00:36:02Z"},{"alias_kind":"pith_short_12","alias_value":"GALK2OAFK2DN","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_16","alias_value":"GALK2OAFK2DNRZYR","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_8","alias_value":"GALK2OAF","created_at":"2026-05-18T12:31:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:GALK2OAFK2DNRZYRKFRK24JZYR","target":"record","payload":{"canonical_record":{"source":{"id":"1707.05624","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-07-18T14:05:20Z","cross_cats_sorted":[],"title_canon_sha256":"39d04f6a954cc29dd96e48be92eec9064ec8464fb99ee3dcc679495128f68852","abstract_canon_sha256":"380c079afc529e3670fe3e27522e26767c72d2b18d7687ae19cd056162d77c38"},"schema_version":"1.0"},"canonical_sha256":"3016ad38055686d8e7115162ad7139c447d85263a987e03450f6b70e94950c4e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:36:02.958108Z","signature_b64":"pTZEqr/nbuoOAfo9b5JlVeFwHB50o2PNviX0MfzVHzPyRJZQpj3pboRvwoMKOKZKoqsP7yvVWg6x7UMHDtJhAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3016ad38055686d8e7115162ad7139c447d85263a987e03450f6b70e94950c4e","last_reissued_at":"2026-05-18T00:36:02.957654Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:36:02.957654Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.05624","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":"2026-05-18T00:36:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6lULebdOOKbQ1qXxCDpRFloxHHQ4aZniSq2648p6BwSNQyEmHXgX/PZZFO5xlVv7e7MxBkzISFDRywZE9LfTBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T06:17:21.513196Z"},"content_sha256":"894936e2e185ddaf5329da26e11ac0ae15fec736dcfe44ca78ba5fad45d137d5","schema_version":"1.0","event_id":"sha256:894936e2e185ddaf5329da26e11ac0ae15fec736dcfe44ca78ba5fad45d137d5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:GALK2OAFK2DNRZYRKFRK24JZYR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Long-term optical polarization variability and multiwavelength analysis of Blazar Mrk 421","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Antonio Galv\\'an-G\\'amez, David Hiriart, Erika Ben\\'itez, Felipe Salazar-V\\'azquez, Jose Antonio de Diego, Jose Ignacio Cabrera, Jose Manuel L\\'opez, Marco Sorcia, Miriam Rojas-Luis, Nissim Fraija, Raul M\\'ujica","submitted_at":"2017-07-18T14:05:20Z","abstract_excerpt":"The results of 8-year R-band photopolarimetric data of blazar Mrk 421 collected from February 2008 to May 2016 are presented, along with extensive multiwavelength observations covering from radio to TeV $\\gamma$-rays around the flares observed in May 2008, March 2010, and April 2013. The most important results are found in 2013 when the source displayed in the R-band a very high brightness state of $11.29\\pm 0.03$ mag ($93.60\\pm 1.53$ mJy) on April 10th and a polarization degree of ($11.00\\pm0.44$) on May 13th. The analysis of the optical data shows that the polarization variability is due to "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.05624","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":"2026-05-18T00:36:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2W61ctZ9qvvWtgBmppoidWDm4aJVNX09YV1IcIiip9I0sjROMhhLFap4PPtAIM7H+XMQVfTvfIki27cvwyOsDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T06:17:21.513898Z"},"content_sha256":"6428d6231329d38701b28e3c3435c88af29286e4722c772b9d9c10406cb82d9e","schema_version":"1.0","event_id":"sha256:6428d6231329d38701b28e3c3435c88af29286e4722c772b9d9c10406cb82d9e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GALK2OAFK2DNRZYRKFRK24JZYR/bundle.json","state_url":"https://pith.science/pith/GALK2OAFK2DNRZYRKFRK24JZYR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GALK2OAFK2DNRZYRKFRK24JZYR/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":"2026-05-26T06:17:21Z","links":{"resolver":"https://pith.science/pith/GALK2OAFK2DNRZYRKFRK24JZYR","bundle":"https://pith.science/pith/GALK2OAFK2DNRZYRKFRK24JZYR/bundle.json","state":"https://pith.science/pith/GALK2OAFK2DNRZYRKFRK24JZYR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GALK2OAFK2DNRZYRKFRK24JZYR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:GALK2OAFK2DNRZYRKFRK24JZYR","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":"380c079afc529e3670fe3e27522e26767c72d2b18d7687ae19cd056162d77c38","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-07-18T14:05:20Z","title_canon_sha256":"39d04f6a954cc29dd96e48be92eec9064ec8464fb99ee3dcc679495128f68852"},"schema_version":"1.0","source":{"id":"1707.05624","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.05624","created_at":"2026-05-18T00:36:02Z"},{"alias_kind":"arxiv_version","alias_value":"1707.05624v1","created_at":"2026-05-18T00:36:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.05624","created_at":"2026-05-18T00:36:02Z"},{"alias_kind":"pith_short_12","alias_value":"GALK2OAFK2DN","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_16","alias_value":"GALK2OAFK2DNRZYR","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_8","alias_value":"GALK2OAF","created_at":"2026-05-18T12:31:15Z"}],"graph_snapshots":[{"event_id":"sha256:6428d6231329d38701b28e3c3435c88af29286e4722c772b9d9c10406cb82d9e","target":"graph","created_at":"2026-05-18T00:36:02Z","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 results of 8-year R-band photopolarimetric data of blazar Mrk 421 collected from February 2008 to May 2016 are presented, along with extensive multiwavelength observations covering from radio to TeV $\\gamma$-rays around the flares observed in May 2008, March 2010, and April 2013. The most important results are found in 2013 when the source displayed in the R-band a very high brightness state of $11.29\\pm 0.03$ mag ($93.60\\pm 1.53$ mJy) on April 10th and a polarization degree of ($11.00\\pm0.44$) on May 13th. The analysis of the optical data shows that the polarization variability is due to ","authors_text":"Antonio Galv\\'an-G\\'amez, David Hiriart, Erika Ben\\'itez, Felipe Salazar-V\\'azquez, Jose Antonio de Diego, Jose Ignacio Cabrera, Jose Manuel L\\'opez, Marco Sorcia, Miriam Rojas-Luis, Nissim Fraija, Raul M\\'ujica","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-07-18T14:05:20Z","title":"Long-term optical polarization variability and multiwavelength analysis of Blazar Mrk 421"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.05624","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":"sha256:894936e2e185ddaf5329da26e11ac0ae15fec736dcfe44ca78ba5fad45d137d5","target":"record","created_at":"2026-05-18T00:36:02Z","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":"380c079afc529e3670fe3e27522e26767c72d2b18d7687ae19cd056162d77c38","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-07-18T14:05:20Z","title_canon_sha256":"39d04f6a954cc29dd96e48be92eec9064ec8464fb99ee3dcc679495128f68852"},"schema_version":"1.0","source":{"id":"1707.05624","kind":"arxiv","version":1}},"canonical_sha256":"3016ad38055686d8e7115162ad7139c447d85263a987e03450f6b70e94950c4e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3016ad38055686d8e7115162ad7139c447d85263a987e03450f6b70e94950c4e","first_computed_at":"2026-05-18T00:36:02.957654Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:36:02.957654Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pTZEqr/nbuoOAfo9b5JlVeFwHB50o2PNviX0MfzVHzPyRJZQpj3pboRvwoMKOKZKoqsP7yvVWg6x7UMHDtJhAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:36:02.958108Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.05624","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:894936e2e185ddaf5329da26e11ac0ae15fec736dcfe44ca78ba5fad45d137d5","sha256:6428d6231329d38701b28e3c3435c88af29286e4722c772b9d9c10406cb82d9e"],"state_sha256":"6ac791b4bc7db87d758fea3580fb839a5df0797c89fe04886b8bc26e05fa197a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ICGDRKphcwliG1Wn/1ccUGT4x9A6mVjhqxzaRztgWgwFXmNKyMapJbmwM8mloCcI21MGz28g6NSZ4Ni4Iz5LCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T06:17:21.517020Z","bundle_sha256":"e4014ab64c0e4cb122c5b402ceef542103d68aea7501444fbc662a49df6e8de1"}}