{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:CGMCUYDG2EPQ6J3HLC5NCKHGFO","short_pith_number":"pith:CGMCUYDG","canonical_record":{"source":{"id":"1210.2921","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-10T13:52:29Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"7b4806c730613c8ad1493d62aa8eac3046c527e45599c16c288dceffa9922c31","abstract_canon_sha256":"e24405021824004b38eff49320f173f296fc868a24b13117d780ae2f8839a26e"},"schema_version":"1.0"},"canonical_sha256":"11982a6066d11f0f276758bad128e62b9b00939632a85cd252588da3cbd084d4","source":{"kind":"arxiv","id":"1210.2921","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2921","created_at":"2026-05-18T03:40:48Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2921v1","created_at":"2026-05-18T03:40:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2921","created_at":"2026-05-18T03:40:48Z"},{"alias_kind":"pith_short_12","alias_value":"CGMCUYDG2EPQ","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CGMCUYDG2EPQ6J3H","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CGMCUYDG","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:CGMCUYDG2EPQ6J3HLC5NCKHGFO","target":"record","payload":{"canonical_record":{"source":{"id":"1210.2921","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-10T13:52:29Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"7b4806c730613c8ad1493d62aa8eac3046c527e45599c16c288dceffa9922c31","abstract_canon_sha256":"e24405021824004b38eff49320f173f296fc868a24b13117d780ae2f8839a26e"},"schema_version":"1.0"},"canonical_sha256":"11982a6066d11f0f276758bad128e62b9b00939632a85cd252588da3cbd084d4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:40:48.983393Z","signature_b64":"D6o4CYMiRi1GPtAeTvj3PmqFVqdLwVKsCMZgXfsRYYa/pkNiQremD3BzdIpK0UPINT1LqcPqgFZEIptCVHQSCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"11982a6066d11f0f276758bad128e62b9b00939632a85cd252588da3cbd084d4","last_reissued_at":"2026-05-18T03:40:48.982591Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:40:48.982591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.2921","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":"2026-05-18T03:40:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d/G7geWTZl9o1JCPeEio+Go2eBnl5+I2vLnWHNLV8wTl6e2G7qx9/+ioPNcPfZrvI3QlTI2sQI/H2OmTjm35CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T13:00:02.149704Z"},"content_sha256":"87c952b2fd27f446e6e0b54c18178221eeb87a6415df47454a3082f649cde51c","schema_version":"1.0","event_id":"sha256:87c952b2fd27f446e6e0b54c18178221eeb87a6415df47454a3082f649cde51c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:CGMCUYDG2EPQ6J3HLC5NCKHGFO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The GREGOR Fabry-P\\'erot Interferometer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"A. D. Wittmann, A. Hofmann, C. Beck, C. Denker, E. Popow, F. Kneer, H. Balthasar, H. Nicklas, J. Hirzberger, K. G. Puschmann, M. Collados, M. Woche, N. Al Erdogan, N. Bello Gonz\\'alez, O. Okunev, R. E. Louis, R. Volkmer, S. M. Bauer, T. Hahn, T. Seelemann, V. Mart\\'inez Pillet","submitted_at":"2012-10-10T13:52:29Z","abstract_excerpt":"The GREGOR Fabry-P\\'erot Interferometer (GFPI) is one of three first-light instruments of the German 1.5-meter GREGOR solar telescope at the Observatorio del Teide, Tenerife, Spain. The GFPI uses two tunable etalons in collimated mounting. Thanks to its large-format, high-cadence CCD detectors with sophisticated computer hard- and software it is capable of scanning spectral lines with a cadence that is sufficient to capture the dynamic evolution of the solar atmosphere. The field-of-view (FOV) of 50\" x 38\" is well suited for quiet Sun and sunspot observations. However, in the vector spectropol"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2921","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":"2026-05-18T03:40:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"malSrSPbAzueOmUK9fvdz6iBJ63npZNIBiDXpL32UWfiwiV9n+gMgNWFRzYWJmq/qfSzidXIjfCae53Y+/qRAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T13:00:02.150046Z"},"content_sha256":"50c2c30ce426ef0f417989785287f828ec6409fac9ee368d71d5fcb9d4744e75","schema_version":"1.0","event_id":"sha256:50c2c30ce426ef0f417989785287f828ec6409fac9ee368d71d5fcb9d4744e75"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CGMCUYDG2EPQ6J3HLC5NCKHGFO/bundle.json","state_url":"https://pith.science/pith/CGMCUYDG2EPQ6J3HLC5NCKHGFO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CGMCUYDG2EPQ6J3HLC5NCKHGFO/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":"2026-05-28T13:00:02Z","links":{"resolver":"https://pith.science/pith/CGMCUYDG2EPQ6J3HLC5NCKHGFO","bundle":"https://pith.science/pith/CGMCUYDG2EPQ6J3HLC5NCKHGFO/bundle.json","state":"https://pith.science/pith/CGMCUYDG2EPQ6J3HLC5NCKHGFO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CGMCUYDG2EPQ6J3HLC5NCKHGFO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:CGMCUYDG2EPQ6J3HLC5NCKHGFO","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":"e24405021824004b38eff49320f173f296fc868a24b13117d780ae2f8839a26e","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-10T13:52:29Z","title_canon_sha256":"7b4806c730613c8ad1493d62aa8eac3046c527e45599c16c288dceffa9922c31"},"schema_version":"1.0","source":{"id":"1210.2921","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2921","created_at":"2026-05-18T03:40:48Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2921v1","created_at":"2026-05-18T03:40:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2921","created_at":"2026-05-18T03:40:48Z"},{"alias_kind":"pith_short_12","alias_value":"CGMCUYDG2EPQ","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CGMCUYDG2EPQ6J3H","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CGMCUYDG","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:50c2c30ce426ef0f417989785287f828ec6409fac9ee368d71d5fcb9d4744e75","target":"graph","created_at":"2026-05-18T03:40:48Z","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 GREGOR Fabry-P\\'erot Interferometer (GFPI) is one of three first-light instruments of the German 1.5-meter GREGOR solar telescope at the Observatorio del Teide, Tenerife, Spain. The GFPI uses two tunable etalons in collimated mounting. Thanks to its large-format, high-cadence CCD detectors with sophisticated computer hard- and software it is capable of scanning spectral lines with a cadence that is sufficient to capture the dynamic evolution of the solar atmosphere. The field-of-view (FOV) of 50\" x 38\" is well suited for quiet Sun and sunspot observations. However, in the vector spectropol","authors_text":"A. D. Wittmann, A. Hofmann, C. Beck, C. Denker, E. Popow, F. Kneer, H. Balthasar, H. Nicklas, J. Hirzberger, K. G. Puschmann, M. Collados, M. Woche, N. Al Erdogan, N. Bello Gonz\\'alez, O. Okunev, R. E. Louis, R. Volkmer, S. M. Bauer, T. Hahn, T. Seelemann, V. Mart\\'inez Pillet","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-10T13:52:29Z","title":"The GREGOR Fabry-P\\'erot Interferometer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2921","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":"sha256:87c952b2fd27f446e6e0b54c18178221eeb87a6415df47454a3082f649cde51c","target":"record","created_at":"2026-05-18T03:40:48Z","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":"e24405021824004b38eff49320f173f296fc868a24b13117d780ae2f8839a26e","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-10T13:52:29Z","title_canon_sha256":"7b4806c730613c8ad1493d62aa8eac3046c527e45599c16c288dceffa9922c31"},"schema_version":"1.0","source":{"id":"1210.2921","kind":"arxiv","version":1}},"canonical_sha256":"11982a6066d11f0f276758bad128e62b9b00939632a85cd252588da3cbd084d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"11982a6066d11f0f276758bad128e62b9b00939632a85cd252588da3cbd084d4","first_computed_at":"2026-05-18T03:40:48.982591Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:40:48.982591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D6o4CYMiRi1GPtAeTvj3PmqFVqdLwVKsCMZgXfsRYYa/pkNiQremD3BzdIpK0UPINT1LqcPqgFZEIptCVHQSCg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:40:48.983393Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.2921","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:87c952b2fd27f446e6e0b54c18178221eeb87a6415df47454a3082f649cde51c","sha256:50c2c30ce426ef0f417989785287f828ec6409fac9ee368d71d5fcb9d4744e75"],"state_sha256":"58a3f320fb42045769120658f210d4853041f05ac8b3dedacf788aaa334f0eaa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M74pjrFUIREExV1rTF7LCriHHXk63Y5L/ZbPkMzaHyHIi4q613V8+ueM8HSKQ+N/Rg9iRnZYNiKPoQy5aSKEBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T13:00:02.152068Z","bundle_sha256":"f6f454183bab7431157997e5bee0bb4f2b57da201d7add439e56c9015c0fbf27"}}