{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:YD4K7BNVRVYO2PZK7L3KY6SYPU","short_pith_number":"pith:YD4K7BNV","canonical_record":{"source":{"id":"astro-ph/9710325","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-10-28T22:01:35Z","cross_cats_sorted":[],"title_canon_sha256":"239daae34292a73590bfddf32b7bafb5178e5ff2153ed46ddd81147ff298b4c6","abstract_canon_sha256":"11ef11a1d86251f340e8b5c6e0e00c51a2ac034d4b73f9146154aff917cd82f0"},"schema_version":"1.0"},"canonical_sha256":"c0f8af85b58d70ed3f2afaf6ac7a587d3488a9c2d3b620c8336b542c3ced3bfb","source":{"kind":"arxiv","id":"astro-ph/9710325","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9710325","created_at":"2026-07-04T16:03:20Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9710325v1","created_at":"2026-07-04T16:03:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9710325","created_at":"2026-07-04T16:03:20Z"},{"alias_kind":"pith_short_12","alias_value":"YD4K7BNVRVYO","created_at":"2026-07-04T16:03:20Z"},{"alias_kind":"pith_short_16","alias_value":"YD4K7BNVRVYO2PZK","created_at":"2026-07-04T16:03:20Z"},{"alias_kind":"pith_short_8","alias_value":"YD4K7BNV","created_at":"2026-07-04T16:03:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:YD4K7BNVRVYO2PZK7L3KY6SYPU","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9710325","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-10-28T22:01:35Z","cross_cats_sorted":[],"title_canon_sha256":"239daae34292a73590bfddf32b7bafb5178e5ff2153ed46ddd81147ff298b4c6","abstract_canon_sha256":"11ef11a1d86251f340e8b5c6e0e00c51a2ac034d4b73f9146154aff917cd82f0"},"schema_version":"1.0"},"canonical_sha256":"c0f8af85b58d70ed3f2afaf6ac7a587d3488a9c2d3b620c8336b542c3ced3bfb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:03:20.040902Z","signature_b64":"D15Rt0UStZNVuid2fl+t6GsXlQTF+67oQiucxuAjy23Esm4sS5N6BtG+rC7ggeCzI+0Bk7fZnWLAi46jBHPdAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c0f8af85b58d70ed3f2afaf6ac7a587d3488a9c2d3b620c8336b542c3ced3bfb","last_reissued_at":"2026-07-04T16:03:20.040554Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:03:20.040554Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9710325","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":"2026-07-04T16:03:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fkx/GTmYPgwseMhKTSJ1GouxhLAMjTwxuJrdvbc627GeGxc1k2iFEJ+A9wvU8ZVYPk9+o3Ee4dYiP3hNXQpPBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T23:53:22.076926Z"},"content_sha256":"8c3de0490acf04af7e40d593e1cfa242d4c0d859479da8ec892b22027765a834","schema_version":"1.0","event_id":"sha256:8c3de0490acf04af7e40d593e1cfa242d4c0d859479da8ec892b22027765a834"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:YD4K7BNVRVYO2PZK7L3KY6SYPU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Search for Ultraviolet Emission from LINERs","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. J. Barth, A. V. Filippenko, L. C. Ho, W. L. W. Sargent","submitted_at":"1997-10-28T22:01:35Z","abstract_excerpt":"We have obtained Hubble Space Telescope WFPC2 2200 A and optical V-band images of 20 low-luminosity active galactic nuclei, most of which are spectroscopically classified as LINERs, in order to search for a possible photoionizing continuum. Six (30%) of the galaxies are detected in the UV. Two of the detected galaxies (NGC 3642 and NGC 4203) have compact, unresolved nuclear UV sources, while the remaining four UV sources (in NGC 4569, NGC 5005, NGC 6500, and NGC 7743) are spatially extended. Combining our sample with that of Maoz et al. (1995), we find that the probability of detection of a nu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9710325","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/9710325/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":"2026-07-04T16:03:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pBCiQnn8/lNob8kH+Tnac2Nmxd4Y50TKPW9XqjIvcgLQz+VSV79nzEiBgwqax29d1tFANMRBQWF+lEF/L5PJCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T23:53:22.077426Z"},"content_sha256":"81a964a409ab310291a92f97c43d8d6aedc2780e68851f192cbc1eff592f5265","schema_version":"1.0","event_id":"sha256:81a964a409ab310291a92f97c43d8d6aedc2780e68851f192cbc1eff592f5265"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YD4K7BNVRVYO2PZK7L3KY6SYPU/bundle.json","state_url":"https://pith.science/pith/YD4K7BNVRVYO2PZK7L3KY6SYPU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YD4K7BNVRVYO2PZK7L3KY6SYPU/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":"2026-08-06T23:53:22Z","links":{"resolver":"https://pith.science/pith/YD4K7BNVRVYO2PZK7L3KY6SYPU","bundle":"https://pith.science/pith/YD4K7BNVRVYO2PZK7L3KY6SYPU/bundle.json","state":"https://pith.science/pith/YD4K7BNVRVYO2PZK7L3KY6SYPU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YD4K7BNVRVYO2PZK7L3KY6SYPU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:YD4K7BNVRVYO2PZK7L3KY6SYPU","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":"11ef11a1d86251f340e8b5c6e0e00c51a2ac034d4b73f9146154aff917cd82f0","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-10-28T22:01:35Z","title_canon_sha256":"239daae34292a73590bfddf32b7bafb5178e5ff2153ed46ddd81147ff298b4c6"},"schema_version":"1.0","source":{"id":"astro-ph/9710325","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9710325","created_at":"2026-07-04T16:03:20Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9710325v1","created_at":"2026-07-04T16:03:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9710325","created_at":"2026-07-04T16:03:20Z"},{"alias_kind":"pith_short_12","alias_value":"YD4K7BNVRVYO","created_at":"2026-07-04T16:03:20Z"},{"alias_kind":"pith_short_16","alias_value":"YD4K7BNVRVYO2PZK","created_at":"2026-07-04T16:03:20Z"},{"alias_kind":"pith_short_8","alias_value":"YD4K7BNV","created_at":"2026-07-04T16:03:20Z"}],"graph_snapshots":[{"event_id":"sha256:81a964a409ab310291a92f97c43d8d6aedc2780e68851f192cbc1eff592f5265","target":"graph","created_at":"2026-07-04T16:03:20Z","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/9710325/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have obtained Hubble Space Telescope WFPC2 2200 A and optical V-band images of 20 low-luminosity active galactic nuclei, most of which are spectroscopically classified as LINERs, in order to search for a possible photoionizing continuum. Six (30%) of the galaxies are detected in the UV. Two of the detected galaxies (NGC 3642 and NGC 4203) have compact, unresolved nuclear UV sources, while the remaining four UV sources (in NGC 4569, NGC 5005, NGC 6500, and NGC 7743) are spatially extended. Combining our sample with that of Maoz et al. (1995), we find that the probability of detection of a nu","authors_text":"A. J. Barth, A. V. Filippenko, L. C. Ho, W. L. W. Sargent","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1997-10-28T22:01:35Z","title":"A Search for Ultraviolet Emission from LINERs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9710325","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":"sha256:8c3de0490acf04af7e40d593e1cfa242d4c0d859479da8ec892b22027765a834","target":"record","created_at":"2026-07-04T16:03:20Z","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":"11ef11a1d86251f340e8b5c6e0e00c51a2ac034d4b73f9146154aff917cd82f0","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-10-28T22:01:35Z","title_canon_sha256":"239daae34292a73590bfddf32b7bafb5178e5ff2153ed46ddd81147ff298b4c6"},"schema_version":"1.0","source":{"id":"astro-ph/9710325","kind":"arxiv","version":1}},"canonical_sha256":"c0f8af85b58d70ed3f2afaf6ac7a587d3488a9c2d3b620c8336b542c3ced3bfb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c0f8af85b58d70ed3f2afaf6ac7a587d3488a9c2d3b620c8336b542c3ced3bfb","first_computed_at":"2026-07-04T16:03:20.040554Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:03:20.040554Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D15Rt0UStZNVuid2fl+t6GsXlQTF+67oQiucxuAjy23Esm4sS5N6BtG+rC7ggeCzI+0Bk7fZnWLAi46jBHPdAQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:03:20.040902Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9710325","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8c3de0490acf04af7e40d593e1cfa242d4c0d859479da8ec892b22027765a834","sha256:81a964a409ab310291a92f97c43d8d6aedc2780e68851f192cbc1eff592f5265"],"state_sha256":"5a1d5edc079f1adf887fb9841adc5bb63239f7f6e5ba7ea5dce5cbbb83f32212"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GF/DKNUvVuFktHvfN4j14gHibu9wNzZOiA4kN9eLyOjk1W9B1ncwQWJMSs1oftog9mHAwosn63QG3jUtMqh0Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T23:53:22.081040Z","bundle_sha256":"f9c2c64c07c9c51b567c885bac165ea02a56668ba43a06f9f70afa09732b3b64"}}