{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:OEOLV4ORLGX624LJC3VNFO5EF3","short_pith_number":"pith:OEOLV4OR","canonical_record":{"source":{"id":"1408.5132","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-08-21T20:00:17Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"f2ff3b778110ff299cb5c2b7710cb81bf79e50961d777692d8fb780e49a37bb0","abstract_canon_sha256":"1e337cc05ed0e2dba34099e5e8c9fe276c7a92862be92eb565f52fe6c317c1bc"},"schema_version":"1.0"},"canonical_sha256":"711cbaf1d159afed716916ead2bba42edac6715bd2ca684659f304be537d44a6","source":{"kind":"arxiv","id":"1408.5132","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.5132","created_at":"2026-05-18T01:42:15Z"},{"alias_kind":"arxiv_version","alias_value":"1408.5132v1","created_at":"2026-05-18T01:42:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.5132","created_at":"2026-05-18T01:42:15Z"},{"alias_kind":"pith_short_12","alias_value":"OEOLV4ORLGX6","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"OEOLV4ORLGX624LJ","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"OEOLV4OR","created_at":"2026-05-18T12:28:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:OEOLV4ORLGX624LJC3VNFO5EF3","target":"record","payload":{"canonical_record":{"source":{"id":"1408.5132","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-08-21T20:00:17Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"f2ff3b778110ff299cb5c2b7710cb81bf79e50961d777692d8fb780e49a37bb0","abstract_canon_sha256":"1e337cc05ed0e2dba34099e5e8c9fe276c7a92862be92eb565f52fe6c317c1bc"},"schema_version":"1.0"},"canonical_sha256":"711cbaf1d159afed716916ead2bba42edac6715bd2ca684659f304be537d44a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:15.769228Z","signature_b64":"lMjQ1btjbclhDpAFzKHGGgIH/htXji9zJ8gPi1aC5yiay+SJqBZ+fXvjS2SY76NYRUhVwr5dkXFhQuYEozErAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"711cbaf1d159afed716916ead2bba42edac6715bd2ca684659f304be537d44a6","last_reissued_at":"2026-05-18T01:42:15.767470Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:15.767470Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1408.5132","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":"2026-05-18T01:42:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tuXiQk5Kz583Mrz7ZcJSj49D3hm/TPHZbBxjNBpvHc6gImFT74K5K2uLwTBXKSZkf1znRkUiUj83g2JNuiyDCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T03:50:40.792292Z"},"content_sha256":"6892212cfeb70a60e13444dc56d44304df29fa359707ba4d28f4af7dc5343141","schema_version":"1.0","event_id":"sha256:6892212cfeb70a60e13444dc56d44304df29fa359707ba4d28f4af7dc5343141"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:OEOLV4ORLGX624LJC3VNFO5EF3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The behavior of the pitch angle of spiral arms depending on optical wavelength","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"A. Luna, Eric E. Mart\\'inez-Garc\\'ia, F. F. Rosales-Ortega, Isaura Fuentes-Carrera, Iv\\^anio Puerari, Rosa A. Gonz\\'alez-L\\'opezlira","submitted_at":"2014-08-21T20:00:17Z","abstract_excerpt":"Based on integral field spectroscopy data from the CALIFA survey, we investigate the possible dependence of spiral arm pitch angle with optical wavelength. For three of the five studied objects, the pitch angle gradually increases at longer wavelengths. This is not the case for two objects where the pitch angle remains constant. This result is confirmed by the analysis of SDSS data. We discuss the possible physical mechanisms to explain this phenomenon, as well as the implications of the results."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.5132","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":"2026-05-18T01:42:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GgeCxO+lV/SjCPBp8YdZ7T0pJWyWnj4aphEAyXLtC2kD/o75ewwrHkLnEjKKR5eBbauc+9f2TJzYYK+fTwg2BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T03:50:40.792674Z"},"content_sha256":"e3195a682a5faa3a010551a5cd12825984b4fa15bd44b2bc44c335387cef4393","schema_version":"1.0","event_id":"sha256:e3195a682a5faa3a010551a5cd12825984b4fa15bd44b2bc44c335387cef4393"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OEOLV4ORLGX624LJC3VNFO5EF3/bundle.json","state_url":"https://pith.science/pith/OEOLV4ORLGX624LJC3VNFO5EF3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OEOLV4ORLGX624LJC3VNFO5EF3/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":"2026-05-30T03:50:40Z","links":{"resolver":"https://pith.science/pith/OEOLV4ORLGX624LJC3VNFO5EF3","bundle":"https://pith.science/pith/OEOLV4ORLGX624LJC3VNFO5EF3/bundle.json","state":"https://pith.science/pith/OEOLV4ORLGX624LJC3VNFO5EF3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OEOLV4ORLGX624LJC3VNFO5EF3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:OEOLV4ORLGX624LJC3VNFO5EF3","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":"1e337cc05ed0e2dba34099e5e8c9fe276c7a92862be92eb565f52fe6c317c1bc","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-08-21T20:00:17Z","title_canon_sha256":"f2ff3b778110ff299cb5c2b7710cb81bf79e50961d777692d8fb780e49a37bb0"},"schema_version":"1.0","source":{"id":"1408.5132","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.5132","created_at":"2026-05-18T01:42:15Z"},{"alias_kind":"arxiv_version","alias_value":"1408.5132v1","created_at":"2026-05-18T01:42:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.5132","created_at":"2026-05-18T01:42:15Z"},{"alias_kind":"pith_short_12","alias_value":"OEOLV4ORLGX6","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"OEOLV4ORLGX624LJ","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"OEOLV4OR","created_at":"2026-05-18T12:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:e3195a682a5faa3a010551a5cd12825984b4fa15bd44b2bc44c335387cef4393","target":"graph","created_at":"2026-05-18T01:42:15Z","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":"Based on integral field spectroscopy data from the CALIFA survey, we investigate the possible dependence of spiral arm pitch angle with optical wavelength. For three of the five studied objects, the pitch angle gradually increases at longer wavelengths. This is not the case for two objects where the pitch angle remains constant. This result is confirmed by the analysis of SDSS data. We discuss the possible physical mechanisms to explain this phenomenon, as well as the implications of the results.","authors_text":"A. Luna, Eric E. Mart\\'inez-Garc\\'ia, F. F. Rosales-Ortega, Isaura Fuentes-Carrera, Iv\\^anio Puerari, Rosa A. Gonz\\'alez-L\\'opezlira","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-08-21T20:00:17Z","title":"The behavior of the pitch angle of spiral arms depending on optical wavelength"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.5132","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":"sha256:6892212cfeb70a60e13444dc56d44304df29fa359707ba4d28f4af7dc5343141","target":"record","created_at":"2026-05-18T01:42:15Z","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":"1e337cc05ed0e2dba34099e5e8c9fe276c7a92862be92eb565f52fe6c317c1bc","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-08-21T20:00:17Z","title_canon_sha256":"f2ff3b778110ff299cb5c2b7710cb81bf79e50961d777692d8fb780e49a37bb0"},"schema_version":"1.0","source":{"id":"1408.5132","kind":"arxiv","version":1}},"canonical_sha256":"711cbaf1d159afed716916ead2bba42edac6715bd2ca684659f304be537d44a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"711cbaf1d159afed716916ead2bba42edac6715bd2ca684659f304be537d44a6","first_computed_at":"2026-05-18T01:42:15.767470Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:15.767470Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lMjQ1btjbclhDpAFzKHGGgIH/htXji9zJ8gPi1aC5yiay+SJqBZ+fXvjS2SY76NYRUhVwr5dkXFhQuYEozErAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:15.769228Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.5132","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6892212cfeb70a60e13444dc56d44304df29fa359707ba4d28f4af7dc5343141","sha256:e3195a682a5faa3a010551a5cd12825984b4fa15bd44b2bc44c335387cef4393"],"state_sha256":"c044816e0d391262ca72e936bfceade3d1bf8de1328c81b9ee74e86653a72f46"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KR3Ax4bYcThQ0/g3sNWg1plIo1I8tnvGDfvvCgm8AqzN5HWXKGsMl6IjS4iCWpVlb2HJSrp22Hp98/7AfvyXAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T03:50:40.795042Z","bundle_sha256":"9946b3b9d2d3582d86d0bed5ba9b690b759661595fdcb0b52a92f679d087ad3d"}}