{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:GVVG2YVNS2GEN3W3KUDIFSDWCG","short_pith_number":"pith:GVVG2YVN","canonical_record":{"source":{"id":"2402.19377","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-02-29T17:27:05Z","cross_cats_sorted":[],"title_canon_sha256":"225ed457118bd89f4e0254c765c1a245e03e8eea32b20f31bddae7eb8d8709c6","abstract_canon_sha256":"2300275c8507d2b55248b07327d2b62847dad3b929b0acfecb4908fc43c55687"},"schema_version":"1.0"},"canonical_sha256":"356a6d62ad968c46eedb550682c87611baaedc719100675f793ef1087e90fcfa","source":{"kind":"arxiv","id":"2402.19377","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2402.19377","created_at":"2026-07-05T07:50:44Z"},{"alias_kind":"arxiv_version","alias_value":"2402.19377v1","created_at":"2026-07-05T07:50:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2402.19377","created_at":"2026-07-05T07:50:44Z"},{"alias_kind":"pith_short_12","alias_value":"GVVG2YVNS2GE","created_at":"2026-07-05T07:50:44Z"},{"alias_kind":"pith_short_16","alias_value":"GVVG2YVNS2GEN3W3","created_at":"2026-07-05T07:50:44Z"},{"alias_kind":"pith_short_8","alias_value":"GVVG2YVN","created_at":"2026-07-05T07:50:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:GVVG2YVNS2GEN3W3KUDIFSDWCG","target":"record","payload":{"canonical_record":{"source":{"id":"2402.19377","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-02-29T17:27:05Z","cross_cats_sorted":[],"title_canon_sha256":"225ed457118bd89f4e0254c765c1a245e03e8eea32b20f31bddae7eb8d8709c6","abstract_canon_sha256":"2300275c8507d2b55248b07327d2b62847dad3b929b0acfecb4908fc43c55687"},"schema_version":"1.0"},"canonical_sha256":"356a6d62ad968c46eedb550682c87611baaedc719100675f793ef1087e90fcfa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:50:44.434680Z","signature_b64":"7b4q6mBbgkfafdv+yqQzmL455Fbt3tA8i937URpe6C189Ai2MmCL9J5qvX/b445o6HcQJruP8MK73WBTQZ6IBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"356a6d62ad968c46eedb550682c87611baaedc719100675f793ef1087e90fcfa","last_reissued_at":"2026-07-05T07:50:44.434183Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:50:44.434183Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2402.19377","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":"2026-07-05T07:50:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SY16TY0ydH7jEYVkRNwgn3W1fGON1sVXvcXxLLKiVD8w/XdKeEMg8fNHu/YjGziZFbpDZYZG8zpZIes7RU2ZCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T11:41:06.824019Z"},"content_sha256":"5192aeaa31bfba805157bb5d1adfb843e9414be6b796b426bee417d19241b7d3","schema_version":"1.0","event_id":"sha256:5192aeaa31bfba805157bb5d1adfb843e9414be6b796b426bee417d19241b7d3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:GVVG2YVNS2GEN3W3KUDIFSDWCG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Rapid Variability of Mrk 421 During Extreme Flaring as Seen Through the Eyes of XMM-Newton","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Biland, A. G. Markowitz, A. Gokus, A. Kreikenbohm, A. Paravac, B. Schleicher, D. Baack, D. Dorner, D. Elsaesser, D. Hildebrand, F. McBride, I. Kreykenbohm, J. Abhir, J. Buss, J. Wilms, K. Brand, K. Leiter, K. Mannheim, K. Pottschmidt, L. Eisenberger, M. A. Nowak, M. Balbo, M. Kadler, M. Kreter, M. Langejahn, M. Linhoff, P. Guenther, R. Walter, S. Hasan, T. Beuchert, T. Bretz, T. Dauser, V. Sliusar, W. Rhode","submitted_at":"2024-02-29T17:27:05Z","abstract_excerpt":"By studying the variability of blazars across the electromagnetic spectrum, it is possible to resolve the underlying processes responsible for rapid flux increases, so-called flares. We report on an extremely bright X-ray flare in the high-peaked BL Lacertae object Mrk 421 that occurred simultaneously with enhanced $\\gamma$-ray activity detected at very high energies (VHE) by FACT on 2019 June 9. We triggered an observation with XMM-Newton, which observed the source quasi-continuously for 25 hours. We find that the source was in the brightest state ever observed using XMM-Newton, reaching a fl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2402.19377","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2402.19377/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T07:50:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bl03jHoxW5+ojtTc8bpTq5Mbk2euKjCEU2mL7v+4iCMu50Wnc0n5IlDGkchN7hfNO0tgLb9Zf2yX+5QV6Q2/BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T11:41:06.824413Z"},"content_sha256":"556a1e2953399127621bed9f25e41093c4dfdf7155c91d2504c4166e4359f5b0","schema_version":"1.0","event_id":"sha256:556a1e2953399127621bed9f25e41093c4dfdf7155c91d2504c4166e4359f5b0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GVVG2YVNS2GEN3W3KUDIFSDWCG/bundle.json","state_url":"https://pith.science/pith/GVVG2YVNS2GEN3W3KUDIFSDWCG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GVVG2YVNS2GEN3W3KUDIFSDWCG/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":"2026-07-05T11:41:06Z","links":{"resolver":"https://pith.science/pith/GVVG2YVNS2GEN3W3KUDIFSDWCG","bundle":"https://pith.science/pith/GVVG2YVNS2GEN3W3KUDIFSDWCG/bundle.json","state":"https://pith.science/pith/GVVG2YVNS2GEN3W3KUDIFSDWCG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GVVG2YVNS2GEN3W3KUDIFSDWCG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:GVVG2YVNS2GEN3W3KUDIFSDWCG","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":"2300275c8507d2b55248b07327d2b62847dad3b929b0acfecb4908fc43c55687","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-02-29T17:27:05Z","title_canon_sha256":"225ed457118bd89f4e0254c765c1a245e03e8eea32b20f31bddae7eb8d8709c6"},"schema_version":"1.0","source":{"id":"2402.19377","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2402.19377","created_at":"2026-07-05T07:50:44Z"},{"alias_kind":"arxiv_version","alias_value":"2402.19377v1","created_at":"2026-07-05T07:50:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2402.19377","created_at":"2026-07-05T07:50:44Z"},{"alias_kind":"pith_short_12","alias_value":"GVVG2YVNS2GE","created_at":"2026-07-05T07:50:44Z"},{"alias_kind":"pith_short_16","alias_value":"GVVG2YVNS2GEN3W3","created_at":"2026-07-05T07:50:44Z"},{"alias_kind":"pith_short_8","alias_value":"GVVG2YVN","created_at":"2026-07-05T07:50:44Z"}],"graph_snapshots":[{"event_id":"sha256:556a1e2953399127621bed9f25e41093c4dfdf7155c91d2504c4166e4359f5b0","target":"graph","created_at":"2026-07-05T07:50:44Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2402.19377/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"By studying the variability of blazars across the electromagnetic spectrum, it is possible to resolve the underlying processes responsible for rapid flux increases, so-called flares. We report on an extremely bright X-ray flare in the high-peaked BL Lacertae object Mrk 421 that occurred simultaneously with enhanced $\\gamma$-ray activity detected at very high energies (VHE) by FACT on 2019 June 9. We triggered an observation with XMM-Newton, which observed the source quasi-continuously for 25 hours. We find that the source was in the brightest state ever observed using XMM-Newton, reaching a fl","authors_text":"A. Biland, A. G. Markowitz, A. Gokus, A. Kreikenbohm, A. Paravac, B. Schleicher, D. Baack, D. Dorner, D. Elsaesser, D. Hildebrand, F. McBride, I. Kreykenbohm, J. Abhir, J. Buss, J. Wilms, K. Brand, K. Leiter, K. Mannheim, K. Pottschmidt, L. Eisenberger, M. A. Nowak, M. Balbo, M. Kadler, M. Kreter, M. Langejahn, M. Linhoff, P. Guenther, R. Walter, S. Hasan, T. Beuchert, T. Bretz, T. Dauser, V. Sliusar, W. Rhode","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-02-29T17:27:05Z","title":"Rapid Variability of Mrk 421 During Extreme Flaring as Seen Through the Eyes of XMM-Newton"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2402.19377","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":"sha256:5192aeaa31bfba805157bb5d1adfb843e9414be6b796b426bee417d19241b7d3","target":"record","created_at":"2026-07-05T07:50:44Z","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":"2300275c8507d2b55248b07327d2b62847dad3b929b0acfecb4908fc43c55687","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-02-29T17:27:05Z","title_canon_sha256":"225ed457118bd89f4e0254c765c1a245e03e8eea32b20f31bddae7eb8d8709c6"},"schema_version":"1.0","source":{"id":"2402.19377","kind":"arxiv","version":1}},"canonical_sha256":"356a6d62ad968c46eedb550682c87611baaedc719100675f793ef1087e90fcfa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"356a6d62ad968c46eedb550682c87611baaedc719100675f793ef1087e90fcfa","first_computed_at":"2026-07-05T07:50:44.434183Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:50:44.434183Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7b4q6mBbgkfafdv+yqQzmL455Fbt3tA8i937URpe6C189Ai2MmCL9J5qvX/b445o6HcQJruP8MK73WBTQZ6IBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T07:50:44.434680Z","signed_message":"canonical_sha256_bytes"},"source_id":"2402.19377","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5192aeaa31bfba805157bb5d1adfb843e9414be6b796b426bee417d19241b7d3","sha256:556a1e2953399127621bed9f25e41093c4dfdf7155c91d2504c4166e4359f5b0"],"state_sha256":"254e4e14dd0e7ddb2c06d153d33cbf07435be3633c7c39b0717f7b71eeb6aa76"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xBELKGBm7kZsiGkaFOFpG9jWDgEQP+1EBBcStwERBPUwK6/8GyTKNXaqC+sv7f2SPGdbjdJNph7k6FPwfyJOAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T11:41:06.826457Z","bundle_sha256":"aacbbd77ecb78608001f204a33d249fe469773924dacf04263780fc909b2c8ca"}}