{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:CWOIQVKMB5JLTDHLHFIDWFUXVR","short_pith_number":"pith:CWOIQVKM","canonical_record":{"source":{"id":"astro-ph/0308345","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-08-20T16:01:00Z","cross_cats_sorted":[],"title_canon_sha256":"198cfa76cc129325fab04614095bee8e1b63f6a568851949f7e231f914a676ba","abstract_canon_sha256":"5b6abc4a7c15ae552ea6323d8027491147a124ad8b9fe171c72c25ed451aeb99"},"schema_version":"1.0"},"canonical_sha256":"159c88554c0f52b98ceb39503b1697ac6bc178e7685e806c6beb79ec8672d442","source":{"kind":"arxiv","id":"astro-ph/0308345","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0308345","created_at":"2026-07-04T16:51:29Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0308345v1","created_at":"2026-07-04T16:51:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0308345","created_at":"2026-07-04T16:51:29Z"},{"alias_kind":"pith_short_12","alias_value":"CWOIQVKMB5JL","created_at":"2026-07-04T16:51:29Z"},{"alias_kind":"pith_short_16","alias_value":"CWOIQVKMB5JLTDHL","created_at":"2026-07-04T16:51:29Z"},{"alias_kind":"pith_short_8","alias_value":"CWOIQVKM","created_at":"2026-07-04T16:51:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:CWOIQVKMB5JLTDHLHFIDWFUXVR","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0308345","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-08-20T16:01:00Z","cross_cats_sorted":[],"title_canon_sha256":"198cfa76cc129325fab04614095bee8e1b63f6a568851949f7e231f914a676ba","abstract_canon_sha256":"5b6abc4a7c15ae552ea6323d8027491147a124ad8b9fe171c72c25ed451aeb99"},"schema_version":"1.0"},"canonical_sha256":"159c88554c0f52b98ceb39503b1697ac6bc178e7685e806c6beb79ec8672d442","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:51:29.619491Z","signature_b64":"AzLwQNr/iGS1HXEvHAI/HWBq9IcnrWc2YyYOHqan8saReSNMyLMSw1gFSC3h7x2P6KAFyO2VKOlwuKTmKst3Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"159c88554c0f52b98ceb39503b1697ac6bc178e7685e806c6beb79ec8672d442","last_reissued_at":"2026-07-04T16:51:29.618938Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:51:29.618938Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0308345","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":"2026-07-04T16:51:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q00w3fpg9QcYHjRh9PkwwKCKsr6X5JzA5jV5QT/v/vsE6soHLaTQYj8Fg7+msQDWYs7G+a2N8Va/UraWroZkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T22:08:41.506110Z"},"content_sha256":"24d84afca8e494f95a497960b2467de9bd90e824e384167f4fbc75d05c791cda","schema_version":"1.0","event_id":"sha256:24d84afca8e494f95a497960b2467de9bd90e824e384167f4fbc75d05c791cda"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:CWOIQVKMB5JLTDHLHFIDWFUXVR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Near-IR spectroscopy of PKS1549-79: a proto-quasar revealed?","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. A. Watson, C. N. Tadhunter, J. Holt, K. A. Wills, M. D. Taylor, M. J. Bellamy, R. Morganti","submitted_at":"2003-08-20T16:01:00Z","abstract_excerpt":"We present a near-IR spectrum of the nearby radio galaxy PKS1549-79 (z=0153). These data were taken with the aim of testing the idea that this object contains a quasar nucleus that is moderately extinguished, despite evidence that its radio jet points close to our line-of-sight. We detect broad Paschen Alpha emission (FWHM ~1745 km/s), relatively bright continuum emission, and a continuum slope consistent with a reddened quasar spectrum (3.1 < Av < 7.3), all emitted by an unresolved point source. Therefore we conclude that we have, indeed, detected a hidden quasar nucleus in PKS1549-79. Combin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0308345","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0308345/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":"2026-07-04T16:51:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7cm2VpyaQcmIaog6tBSlFdSnCgKjQwmSPgt9fD0mf8fWUGh3B8gXNJxmN/t86Sdcgc53jsU52uXcoX203qd6Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T22:08:41.506620Z"},"content_sha256":"85a53fbe55f913b84f7a7c7b09a14697bb0e14d640286e2fb68d2f9e269ea31d","schema_version":"1.0","event_id":"sha256:85a53fbe55f913b84f7a7c7b09a14697bb0e14d640286e2fb68d2f9e269ea31d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CWOIQVKMB5JLTDHLHFIDWFUXVR/bundle.json","state_url":"https://pith.science/pith/CWOIQVKMB5JLTDHLHFIDWFUXVR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CWOIQVKMB5JLTDHLHFIDWFUXVR/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":"2026-08-04T22:08:41Z","links":{"resolver":"https://pith.science/pith/CWOIQVKMB5JLTDHLHFIDWFUXVR","bundle":"https://pith.science/pith/CWOIQVKMB5JLTDHLHFIDWFUXVR/bundle.json","state":"https://pith.science/pith/CWOIQVKMB5JLTDHLHFIDWFUXVR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CWOIQVKMB5JLTDHLHFIDWFUXVR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:CWOIQVKMB5JLTDHLHFIDWFUXVR","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":"5b6abc4a7c15ae552ea6323d8027491147a124ad8b9fe171c72c25ed451aeb99","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-08-20T16:01:00Z","title_canon_sha256":"198cfa76cc129325fab04614095bee8e1b63f6a568851949f7e231f914a676ba"},"schema_version":"1.0","source":{"id":"astro-ph/0308345","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0308345","created_at":"2026-07-04T16:51:29Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0308345v1","created_at":"2026-07-04T16:51:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0308345","created_at":"2026-07-04T16:51:29Z"},{"alias_kind":"pith_short_12","alias_value":"CWOIQVKMB5JL","created_at":"2026-07-04T16:51:29Z"},{"alias_kind":"pith_short_16","alias_value":"CWOIQVKMB5JLTDHL","created_at":"2026-07-04T16:51:29Z"},{"alias_kind":"pith_short_8","alias_value":"CWOIQVKM","created_at":"2026-07-04T16:51:29Z"}],"graph_snapshots":[{"event_id":"sha256:85a53fbe55f913b84f7a7c7b09a14697bb0e14d640286e2fb68d2f9e269ea31d","target":"graph","created_at":"2026-07-04T16:51:29Z","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/astro-ph/0308345/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a near-IR spectrum of the nearby radio galaxy PKS1549-79 (z=0153). These data were taken with the aim of testing the idea that this object contains a quasar nucleus that is moderately extinguished, despite evidence that its radio jet points close to our line-of-sight. We detect broad Paschen Alpha emission (FWHM ~1745 km/s), relatively bright continuum emission, and a continuum slope consistent with a reddened quasar spectrum (3.1 < Av < 7.3), all emitted by an unresolved point source. Therefore we conclude that we have, indeed, detected a hidden quasar nucleus in PKS1549-79. Combin","authors_text":"C. A. Watson, C. N. Tadhunter, J. Holt, K. A. Wills, M. D. Taylor, M. J. Bellamy, R. Morganti","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-08-20T16:01:00Z","title":"Near-IR spectroscopy of PKS1549-79: a proto-quasar revealed?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0308345","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":"sha256:24d84afca8e494f95a497960b2467de9bd90e824e384167f4fbc75d05c791cda","target":"record","created_at":"2026-07-04T16:51:29Z","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":"5b6abc4a7c15ae552ea6323d8027491147a124ad8b9fe171c72c25ed451aeb99","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-08-20T16:01:00Z","title_canon_sha256":"198cfa76cc129325fab04614095bee8e1b63f6a568851949f7e231f914a676ba"},"schema_version":"1.0","source":{"id":"astro-ph/0308345","kind":"arxiv","version":1}},"canonical_sha256":"159c88554c0f52b98ceb39503b1697ac6bc178e7685e806c6beb79ec8672d442","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"159c88554c0f52b98ceb39503b1697ac6bc178e7685e806c6beb79ec8672d442","first_computed_at":"2026-07-04T16:51:29.618938Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:51:29.618938Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AzLwQNr/iGS1HXEvHAI/HWBq9IcnrWc2YyYOHqan8saReSNMyLMSw1gFSC3h7x2P6KAFyO2VKOlwuKTmKst3Bg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:51:29.619491Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0308345","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:24d84afca8e494f95a497960b2467de9bd90e824e384167f4fbc75d05c791cda","sha256:85a53fbe55f913b84f7a7c7b09a14697bb0e14d640286e2fb68d2f9e269ea31d"],"state_sha256":"13dd6b8cb7d462103b8f476ebe73ff2e08f814b6669ada7bdd4599db1b151949"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IOcMDHhtCkJhy+2RjxuvfQq5mtUmP4qLcoCkgr4F/7BL3eOIipDArXMeW9Z/hQgDngHMFUGb+gMD6WzJF8ZmBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T22:08:41.512024Z","bundle_sha256":"9ae7053e2c1bb0c196d096f2951f526cdfe3a5066069f9f5c2edcfed44164250"}}