{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:PHBTFY7S7MHKVSCX4YAV6A36GT","short_pith_number":"pith:PHBTFY7S","canonical_record":{"source":{"id":"1809.04333","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-12T09:47:44Z","cross_cats_sorted":[],"title_canon_sha256":"003fa0a4ffc2efe2522f4fa6401ad326c5d6968644b6d6be32330285f219b457","abstract_canon_sha256":"e2505fbf1eda01c3de9aa724dd18f181dde063634a7218192c2ebd10919330cd"},"schema_version":"1.0"},"canonical_sha256":"79c332e3f2fb0eaac857e6015f037e34c9776928a596488ae1f1818f3cbf13ea","source":{"kind":"arxiv","id":"1809.04333","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.04333","created_at":"2026-05-18T00:04:54Z"},{"alias_kind":"arxiv_version","alias_value":"1809.04333v1","created_at":"2026-05-18T00:04:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.04333","created_at":"2026-05-18T00:04:54Z"},{"alias_kind":"pith_short_12","alias_value":"PHBTFY7S7MHK","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"PHBTFY7S7MHKVSCX","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"PHBTFY7S","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:PHBTFY7S7MHKVSCX4YAV6A36GT","target":"record","payload":{"canonical_record":{"source":{"id":"1809.04333","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-12T09:47:44Z","cross_cats_sorted":[],"title_canon_sha256":"003fa0a4ffc2efe2522f4fa6401ad326c5d6968644b6d6be32330285f219b457","abstract_canon_sha256":"e2505fbf1eda01c3de9aa724dd18f181dde063634a7218192c2ebd10919330cd"},"schema_version":"1.0"},"canonical_sha256":"79c332e3f2fb0eaac857e6015f037e34c9776928a596488ae1f1818f3cbf13ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:54.629597Z","signature_b64":"del11V03YiwNQlRIdyg/vcOGrHoChxWlqZ33czrH7UEh2mkNclvNYc2ZphTr8J4Z9E8aCrj/zJTrcO2bGb4pCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"79c332e3f2fb0eaac857e6015f037e34c9776928a596488ae1f1818f3cbf13ea","last_reissued_at":"2026-05-18T00:04:54.629099Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:54.629099Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.04333","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":"2026-05-18T00:04:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S0LH6pIM/PKGLTsdKpKzh2nJyQFd9taOSl8RfMqIG1BDapcM91jBSSfuIV+ov1D69Qd4Nn8veANuLTp4EOwiCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T00:20:11.516231Z"},"content_sha256":"335642d76845738253b75116a307743423ae127e2391bbe3807987e163b7f760","schema_version":"1.0","event_id":"sha256:335642d76845738253b75116a307743423ae127e2391bbe3807987e163b7f760"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:PHBTFY7S7MHKVSCX4YAV6A36GT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Malin 1 'cousin' with counter-rotation: internal dynamics and stellar content of the giant low surface brightness galaxy UGC 1922","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Anastasia V. Kasparova, Anna S. Saburova, Igor V. Chilingarian, Ivan Yu. Katkov, Oleg V. Egorov, Olga V. Vozyakova, Roman I. Uklein, Sergey A. Khoperskov","submitted_at":"2018-09-12T09:47:44Z","abstract_excerpt":"The formation scenario for giant low surface brightness (gLSB) galaxies with discs as large as 100 kpc still remains unclear. These stellar systems are rare and very hard to observe, therefore a detailed insight on every additional object helps to understand their nature. Here we present a detailed observational study of the gLSB UGC 1922 performed using deep optical imaging and spectroscopic observations combined with archival ultraviolet data. We derived spatially resolved properties of stellar and ionized gas kinematics and characteristics of stellar populations and interstellar medium. We "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.04333","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":"2026-05-18T00:04:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MorXdMwoywJjIE73uKm+KhM+YpBf8DggVKj3j1U/UYxm7ast6qcn/k51+Q+RKj/Q4Mq5MAEftKAHXIHbMUvcCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T00:20:11.516598Z"},"content_sha256":"c88761dfcef39a99f0a6faca9729f84aa5a6551588e4a0594ef86b3a8200c7a4","schema_version":"1.0","event_id":"sha256:c88761dfcef39a99f0a6faca9729f84aa5a6551588e4a0594ef86b3a8200c7a4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PHBTFY7S7MHKVSCX4YAV6A36GT/bundle.json","state_url":"https://pith.science/pith/PHBTFY7S7MHKVSCX4YAV6A36GT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PHBTFY7S7MHKVSCX4YAV6A36GT/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":"2026-06-03T00:20:11Z","links":{"resolver":"https://pith.science/pith/PHBTFY7S7MHKVSCX4YAV6A36GT","bundle":"https://pith.science/pith/PHBTFY7S7MHKVSCX4YAV6A36GT/bundle.json","state":"https://pith.science/pith/PHBTFY7S7MHKVSCX4YAV6A36GT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PHBTFY7S7MHKVSCX4YAV6A36GT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:PHBTFY7S7MHKVSCX4YAV6A36GT","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":"e2505fbf1eda01c3de9aa724dd18f181dde063634a7218192c2ebd10919330cd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-12T09:47:44Z","title_canon_sha256":"003fa0a4ffc2efe2522f4fa6401ad326c5d6968644b6d6be32330285f219b457"},"schema_version":"1.0","source":{"id":"1809.04333","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.04333","created_at":"2026-05-18T00:04:54Z"},{"alias_kind":"arxiv_version","alias_value":"1809.04333v1","created_at":"2026-05-18T00:04:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.04333","created_at":"2026-05-18T00:04:54Z"},{"alias_kind":"pith_short_12","alias_value":"PHBTFY7S7MHK","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"PHBTFY7S7MHKVSCX","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"PHBTFY7S","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:c88761dfcef39a99f0a6faca9729f84aa5a6551588e4a0594ef86b3a8200c7a4","target":"graph","created_at":"2026-05-18T00:04:54Z","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 formation scenario for giant low surface brightness (gLSB) galaxies with discs as large as 100 kpc still remains unclear. These stellar systems are rare and very hard to observe, therefore a detailed insight on every additional object helps to understand their nature. Here we present a detailed observational study of the gLSB UGC 1922 performed using deep optical imaging and spectroscopic observations combined with archival ultraviolet data. We derived spatially resolved properties of stellar and ionized gas kinematics and characteristics of stellar populations and interstellar medium. We ","authors_text":"Anastasia V. Kasparova, Anna S. Saburova, Igor V. Chilingarian, Ivan Yu. Katkov, Oleg V. Egorov, Olga V. Vozyakova, Roman I. Uklein, Sergey A. Khoperskov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-12T09:47:44Z","title":"A Malin 1 'cousin' with counter-rotation: internal dynamics and stellar content of the giant low surface brightness galaxy UGC 1922"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.04333","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":"sha256:335642d76845738253b75116a307743423ae127e2391bbe3807987e163b7f760","target":"record","created_at":"2026-05-18T00:04:54Z","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":"e2505fbf1eda01c3de9aa724dd18f181dde063634a7218192c2ebd10919330cd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-12T09:47:44Z","title_canon_sha256":"003fa0a4ffc2efe2522f4fa6401ad326c5d6968644b6d6be32330285f219b457"},"schema_version":"1.0","source":{"id":"1809.04333","kind":"arxiv","version":1}},"canonical_sha256":"79c332e3f2fb0eaac857e6015f037e34c9776928a596488ae1f1818f3cbf13ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"79c332e3f2fb0eaac857e6015f037e34c9776928a596488ae1f1818f3cbf13ea","first_computed_at":"2026-05-18T00:04:54.629099Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:54.629099Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"del11V03YiwNQlRIdyg/vcOGrHoChxWlqZ33czrH7UEh2mkNclvNYc2ZphTr8J4Z9E8aCrj/zJTrcO2bGb4pCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:54.629597Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.04333","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:335642d76845738253b75116a307743423ae127e2391bbe3807987e163b7f760","sha256:c88761dfcef39a99f0a6faca9729f84aa5a6551588e4a0594ef86b3a8200c7a4"],"state_sha256":"93434a681ebb413ab678099895180967ef0d1f17fda357a66da08cd34f8e782f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rB3tsCBb1YgxRJk2qrkQyD5Ykkn//VoqWfZw3jsduVwIXim8khpzbRZDTraZ27U1o9D8EaMxABjrLstXznkvDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T00:20:11.518538Z","bundle_sha256":"7965ea3e357a14a0427259c0935a15ab492adf4b36321f5898be97ce87e7fd7e"}}