{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:FBMNVMZAQGBBWN3ZZJWVU7J4ZI","short_pith_number":"pith:FBMNVMZA","canonical_record":{"source":{"id":"1609.09501","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-29T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"389189f57d0e91e08391126ec24a7a759035991e2741458f83a267aaa83a373f","abstract_canon_sha256":"bcb98be8e94fd383eae1ef0005d7569ef4468716446629daec7cf0f98977852d"},"schema_version":"1.0"},"canonical_sha256":"2858dab32081821b3779ca6d5a7d3cca18555605d9521d4bc843f9d46f2339b1","source":{"kind":"arxiv","id":"1609.09501","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.09501","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"arxiv_version","alias_value":"1609.09501v1","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.09501","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"pith_short_12","alias_value":"FBMNVMZAQGBB","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"FBMNVMZAQGBBWN3Z","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"FBMNVMZA","created_at":"2026-05-18T12:30:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:FBMNVMZAQGBBWN3ZZJWVU7J4ZI","target":"record","payload":{"canonical_record":{"source":{"id":"1609.09501","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-29T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"389189f57d0e91e08391126ec24a7a759035991e2741458f83a267aaa83a373f","abstract_canon_sha256":"bcb98be8e94fd383eae1ef0005d7569ef4468716446629daec7cf0f98977852d"},"schema_version":"1.0"},"canonical_sha256":"2858dab32081821b3779ca6d5a7d3cca18555605d9521d4bc843f9d46f2339b1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:59:18.843098Z","signature_b64":"C6UWL1mktSxdyjvDxBDXcSrdP5qRppnzt9ho8+LOFrKIruHiWuxax8eKA5+R8MBnybPsuBVK92pFWuIAnDd6BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2858dab32081821b3779ca6d5a7d3cca18555605d9521d4bc843f9d46f2339b1","last_reissued_at":"2026-05-18T00:59:18.842483Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:59:18.842483Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.09501","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":"2026-05-18T00:59:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HWbGNALyzni2J1S4mt/jN9dWDtEoPMubPDaqgMJ+GQ3tPohYfmzngGEZ498/WPwl6LAu017bMVfYDMkBlLXPDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T17:17:37.045735Z"},"content_sha256":"22513edfa7238859b21119deeeb5ccf1279f24d6cf7c60cfa1cf9a0065d91327","schema_version":"1.0","event_id":"sha256:22513edfa7238859b21119deeeb5ccf1279f24d6cf7c60cfa1cf9a0065d91327"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:FBMNVMZAQGBBWN3ZZJWVU7J4ZI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SDSSJ143244.91+301435.3 at VLBI: a compact radio galaxy in a narrow-line Seyfert 1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Caccianiga, A. Paulino-Afonso, D. Dallacasa, K.-H. Mack, L. Ballo, M. Berton, S. Anton","submitted_at":"2016-09-29T20:00:02Z","abstract_excerpt":"We present VLBI observations, carried out with the European Very Long Baseline Interferometry Network (EVN), of SDSSJ143244.91+301435.3, a radio-loud narrow-line Seyfert 1 (RLNLS1) characterized by a steep radio spectrum. The source, compact at Very Large Array (VLA) resolution, is resolved on the milliarcsec scale, showing a central region plus two extended structures. The relatively high brightness temperature of all components (5x10^6-1.3x10^8 K) supports the hypothesis that the radio emission is non-thermal and likely produced by a relativistic jet and/or small radio lobes. The observed ra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.09501","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":"2026-05-18T00:59:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"02JOHvJa8+J2kJflH6XNTf9z0n7GHTResk8zAPd/FJEQYPSxmAaH3pcNcPUE6ueslIBN5NSj7/PDYml06QgkAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T17:17:37.046155Z"},"content_sha256":"31aafd0de671b8cd13ea398aebf7afddc1ea4f5f9ba4839120060e336079993f","schema_version":"1.0","event_id":"sha256:31aafd0de671b8cd13ea398aebf7afddc1ea4f5f9ba4839120060e336079993f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FBMNVMZAQGBBWN3ZZJWVU7J4ZI/bundle.json","state_url":"https://pith.science/pith/FBMNVMZAQGBBWN3ZZJWVU7J4ZI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FBMNVMZAQGBBWN3ZZJWVU7J4ZI/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":"2026-06-10T17:17:37Z","links":{"resolver":"https://pith.science/pith/FBMNVMZAQGBBWN3ZZJWVU7J4ZI","bundle":"https://pith.science/pith/FBMNVMZAQGBBWN3ZZJWVU7J4ZI/bundle.json","state":"https://pith.science/pith/FBMNVMZAQGBBWN3ZZJWVU7J4ZI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FBMNVMZAQGBBWN3ZZJWVU7J4ZI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:FBMNVMZAQGBBWN3ZZJWVU7J4ZI","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":"bcb98be8e94fd383eae1ef0005d7569ef4468716446629daec7cf0f98977852d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-29T20:00:02Z","title_canon_sha256":"389189f57d0e91e08391126ec24a7a759035991e2741458f83a267aaa83a373f"},"schema_version":"1.0","source":{"id":"1609.09501","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.09501","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"arxiv_version","alias_value":"1609.09501v1","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.09501","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"pith_short_12","alias_value":"FBMNVMZAQGBB","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"FBMNVMZAQGBBWN3Z","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"FBMNVMZA","created_at":"2026-05-18T12:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:31aafd0de671b8cd13ea398aebf7afddc1ea4f5f9ba4839120060e336079993f","target":"graph","created_at":"2026-05-18T00:59:18Z","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":"We present VLBI observations, carried out with the European Very Long Baseline Interferometry Network (EVN), of SDSSJ143244.91+301435.3, a radio-loud narrow-line Seyfert 1 (RLNLS1) characterized by a steep radio spectrum. The source, compact at Very Large Array (VLA) resolution, is resolved on the milliarcsec scale, showing a central region plus two extended structures. The relatively high brightness temperature of all components (5x10^6-1.3x10^8 K) supports the hypothesis that the radio emission is non-thermal and likely produced by a relativistic jet and/or small radio lobes. The observed ra","authors_text":"A. Caccianiga, A. Paulino-Afonso, D. Dallacasa, K.-H. Mack, L. Ballo, M. Berton, S. Anton","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-29T20:00:02Z","title":"SDSSJ143244.91+301435.3 at VLBI: a compact radio galaxy in a narrow-line Seyfert 1"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.09501","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":"sha256:22513edfa7238859b21119deeeb5ccf1279f24d6cf7c60cfa1cf9a0065d91327","target":"record","created_at":"2026-05-18T00:59:18Z","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":"bcb98be8e94fd383eae1ef0005d7569ef4468716446629daec7cf0f98977852d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-29T20:00:02Z","title_canon_sha256":"389189f57d0e91e08391126ec24a7a759035991e2741458f83a267aaa83a373f"},"schema_version":"1.0","source":{"id":"1609.09501","kind":"arxiv","version":1}},"canonical_sha256":"2858dab32081821b3779ca6d5a7d3cca18555605d9521d4bc843f9d46f2339b1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2858dab32081821b3779ca6d5a7d3cca18555605d9521d4bc843f9d46f2339b1","first_computed_at":"2026-05-18T00:59:18.842483Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:59:18.842483Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C6UWL1mktSxdyjvDxBDXcSrdP5qRppnzt9ho8+LOFrKIruHiWuxax8eKA5+R8MBnybPsuBVK92pFWuIAnDd6BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:59:18.843098Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.09501","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:22513edfa7238859b21119deeeb5ccf1279f24d6cf7c60cfa1cf9a0065d91327","sha256:31aafd0de671b8cd13ea398aebf7afddc1ea4f5f9ba4839120060e336079993f"],"state_sha256":"3f6bf26e53849640bb1d2f8d770ea093d439620272dc3b5d6612c104b6e1b8f3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k3+diVg05qa1BBGC+A+bOUkmi4RePTQCu6eS9PHNuhKSWC4roxjlwUKioMziAGPBGprZVcmJ7SnEwbjXbsVqBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T17:17:37.049350Z","bundle_sha256":"a36e8541f2d17437b3f05a6321815596095d8970d7cc734c5aebbcd0d94f62bc"}}