{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:OKGAKOC7VWOXHW2DZ7YLFZMVU3","short_pith_number":"pith:OKGAKOC7","canonical_record":{"source":{"id":"2111.08972","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-11-17T08:29:43Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"2cc33fbf7044f251194d9c83c39ca0ab315bc0002be2ef80efc8ef53c582fe37","abstract_canon_sha256":"15874d5aba0434c73f19148136e2b930ec1e863bf8b7c3e2ec393c642ac274b2"},"schema_version":"1.0"},"canonical_sha256":"728c05385fad9d73db43cff0b2e595a6d2f74d0138f92a10dddf1f521578efbd","source":{"kind":"arxiv","id":"2111.08972","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.08972","created_at":"2026-07-05T03:49:25Z"},{"alias_kind":"arxiv_version","alias_value":"2111.08972v2","created_at":"2026-07-05T03:49:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.08972","created_at":"2026-07-05T03:49:25Z"},{"alias_kind":"pith_short_12","alias_value":"OKGAKOC7VWOX","created_at":"2026-07-05T03:49:25Z"},{"alias_kind":"pith_short_16","alias_value":"OKGAKOC7VWOXHW2D","created_at":"2026-07-05T03:49:25Z"},{"alias_kind":"pith_short_8","alias_value":"OKGAKOC7","created_at":"2026-07-05T03:49:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:OKGAKOC7VWOXHW2DZ7YLFZMVU3","target":"record","payload":{"canonical_record":{"source":{"id":"2111.08972","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-11-17T08:29:43Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"2cc33fbf7044f251194d9c83c39ca0ab315bc0002be2ef80efc8ef53c582fe37","abstract_canon_sha256":"15874d5aba0434c73f19148136e2b930ec1e863bf8b7c3e2ec393c642ac274b2"},"schema_version":"1.0"},"canonical_sha256":"728c05385fad9d73db43cff0b2e595a6d2f74d0138f92a10dddf1f521578efbd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:49:25.687237Z","signature_b64":"+LRyr/Bnx1bkXx0sjCb+xuvTCL34MtF++WAx/uiMCEMXW1qx8CxOhYCdmUoirhZlLW0+8I2vhHWyEaPa+gU7DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"728c05385fad9d73db43cff0b2e595a6d2f74d0138f92a10dddf1f521578efbd","last_reissued_at":"2026-07-05T03:49:25.686791Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:49:25.686791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2111.08972","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:49:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VINSzUg/EOev/Mtl72T2H/ZLpYF2vs8pE+jYb2DHQTUFJIMscNNFrSKTzPbDLgaZ8le+eQfBvduoK9L6XaCgAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T08:02:08.651261Z"},"content_sha256":"0319d23341be36b0dc49de6fc13f70af0cd61d3c01c1973155531b0e5dfc8f28","schema_version":"1.0","event_id":"sha256:0319d23341be36b0dc49de6fc13f70af0cd61d3c01c1973155531b0e5dfc8f28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:OKGAKOC7VWOXHW2DZ7YLFZMVU3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the evolution of a sub-C class flare: a showcase for the capabilities of the revamped Catania Solar Telescope","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"Alessandro Costa, Daniele Spadaro, Eugenio Martinetti, Francesca Zuccarello, Giovanni Occhipinti, Giuseppe E. Capuano, Mariachiara Falco, Paolo Romano, Pierfrancesco Costa, Rita Ventura, Salvatore Buttaccio, Salvo L. Guglielmino","submitted_at":"2021-11-17T08:29:43Z","abstract_excerpt":"Solar flares are occasionally responsible for severe Space Weather events, which can affect space-borne and ground-based infrastructures, endangering anthropic technological activities and even human health and safety. Thus, an essential activity in the framework of Space Weather monitoring is devoted to the observation of the activity level of the Sun.\n  In this context, the acquisition system of the Catania Solar Telescope has been recently upgraded in order to improve its contribution to the European Space Agency (ESA) - Space Weather Service Network through the ESA Portal, which represents"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.08972","kind":"arxiv","version":2},"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/2111.08972/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":"2026-07-05T03:49:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wz765FDqjowg+H9YjD937mdyEBNUkzwX232RkqBXq6nVoqQQqwU8eYIQDcunLcEwg4CI/Bje3wZ8liMmekZQCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T08:02:08.651649Z"},"content_sha256":"0269e497d8f985e28df43ecfecedaf99a05ec004a15a793258a766fe7c4ecd98","schema_version":"1.0","event_id":"sha256:0269e497d8f985e28df43ecfecedaf99a05ec004a15a793258a766fe7c4ecd98"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OKGAKOC7VWOXHW2DZ7YLFZMVU3/bundle.json","state_url":"https://pith.science/pith/OKGAKOC7VWOXHW2DZ7YLFZMVU3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OKGAKOC7VWOXHW2DZ7YLFZMVU3/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":"2026-07-07T08:02:08Z","links":{"resolver":"https://pith.science/pith/OKGAKOC7VWOXHW2DZ7YLFZMVU3","bundle":"https://pith.science/pith/OKGAKOC7VWOXHW2DZ7YLFZMVU3/bundle.json","state":"https://pith.science/pith/OKGAKOC7VWOXHW2DZ7YLFZMVU3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OKGAKOC7VWOXHW2DZ7YLFZMVU3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:OKGAKOC7VWOXHW2DZ7YLFZMVU3","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":"15874d5aba0434c73f19148136e2b930ec1e863bf8b7c3e2ec393c642ac274b2","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-11-17T08:29:43Z","title_canon_sha256":"2cc33fbf7044f251194d9c83c39ca0ab315bc0002be2ef80efc8ef53c582fe37"},"schema_version":"1.0","source":{"id":"2111.08972","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.08972","created_at":"2026-07-05T03:49:25Z"},{"alias_kind":"arxiv_version","alias_value":"2111.08972v2","created_at":"2026-07-05T03:49:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.08972","created_at":"2026-07-05T03:49:25Z"},{"alias_kind":"pith_short_12","alias_value":"OKGAKOC7VWOX","created_at":"2026-07-05T03:49:25Z"},{"alias_kind":"pith_short_16","alias_value":"OKGAKOC7VWOXHW2D","created_at":"2026-07-05T03:49:25Z"},{"alias_kind":"pith_short_8","alias_value":"OKGAKOC7","created_at":"2026-07-05T03:49:25Z"}],"graph_snapshots":[{"event_id":"sha256:0269e497d8f985e28df43ecfecedaf99a05ec004a15a793258a766fe7c4ecd98","target":"graph","created_at":"2026-07-05T03:49:25Z","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/2111.08972/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Solar flares are occasionally responsible for severe Space Weather events, which can affect space-borne and ground-based infrastructures, endangering anthropic technological activities and even human health and safety. Thus, an essential activity in the framework of Space Weather monitoring is devoted to the observation of the activity level of the Sun.\n  In this context, the acquisition system of the Catania Solar Telescope has been recently upgraded in order to improve its contribution to the European Space Agency (ESA) - Space Weather Service Network through the ESA Portal, which represents","authors_text":"Alessandro Costa, Daniele Spadaro, Eugenio Martinetti, Francesca Zuccarello, Giovanni Occhipinti, Giuseppe E. Capuano, Mariachiara Falco, Paolo Romano, Pierfrancesco Costa, Rita Ventura, Salvatore Buttaccio, Salvo L. Guglielmino","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-11-17T08:29:43Z","title":"On the evolution of a sub-C class flare: a showcase for the capabilities of the revamped Catania Solar Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.08972","kind":"arxiv","version":2},"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":"sha256:0319d23341be36b0dc49de6fc13f70af0cd61d3c01c1973155531b0e5dfc8f28","target":"record","created_at":"2026-07-05T03:49:25Z","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":"15874d5aba0434c73f19148136e2b930ec1e863bf8b7c3e2ec393c642ac274b2","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-11-17T08:29:43Z","title_canon_sha256":"2cc33fbf7044f251194d9c83c39ca0ab315bc0002be2ef80efc8ef53c582fe37"},"schema_version":"1.0","source":{"id":"2111.08972","kind":"arxiv","version":2}},"canonical_sha256":"728c05385fad9d73db43cff0b2e595a6d2f74d0138f92a10dddf1f521578efbd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"728c05385fad9d73db43cff0b2e595a6d2f74d0138f92a10dddf1f521578efbd","first_computed_at":"2026-07-05T03:49:25.686791Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:49:25.686791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+LRyr/Bnx1bkXx0sjCb+xuvTCL34MtF++WAx/uiMCEMXW1qx8CxOhYCdmUoirhZlLW0+8I2vhHWyEaPa+gU7DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:49:25.687237Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.08972","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0319d23341be36b0dc49de6fc13f70af0cd61d3c01c1973155531b0e5dfc8f28","sha256:0269e497d8f985e28df43ecfecedaf99a05ec004a15a793258a766fe7c4ecd98"],"state_sha256":"432d93eedccbeec1e7454415fafb3da89a92ff894f4c5662a45a57967de3d3cb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GLi3wa+KNCVoGIS8s5ir0OCIJ3FDknSiuBK9p0udMVS7cqGa9BeIwxnkD5h7tlG/K//YWmrTNhvtgXB6QBBpDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T08:02:08.653765Z","bundle_sha256":"776dceb2315ece8f9fc9bd8ac26cf76da039e115f300f6d305ec3dc564116325"}}