{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:RPCRSTY6KJ5CRSIBYAHXR2YYRX","short_pith_number":"pith:RPCRSTY6","canonical_record":{"source":{"id":"2007.08525","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-07-16T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"de13d6950dd616eb631aae12c9127f5bbc93eaf6ce9b8496e59458ff40aaba32","abstract_canon_sha256":"d2bce83d5a7ca6e9fe8d71c411cf385ec52b51b953c87f0a471465e040f49734"},"schema_version":"1.0"},"canonical_sha256":"8bc5194f1e527a28c901c00f78eb188dde388ac949fb0c172de86c760641fba4","source":{"kind":"arxiv","id":"2007.08525","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.08525","created_at":"2026-07-05T01:30:35Z"},{"alias_kind":"arxiv_version","alias_value":"2007.08525v2","created_at":"2026-07-05T01:30:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.08525","created_at":"2026-07-05T01:30:35Z"},{"alias_kind":"pith_short_12","alias_value":"RPCRSTY6KJ5C","created_at":"2026-07-05T01:30:35Z"},{"alias_kind":"pith_short_16","alias_value":"RPCRSTY6KJ5CRSIB","created_at":"2026-07-05T01:30:35Z"},{"alias_kind":"pith_short_8","alias_value":"RPCRSTY6","created_at":"2026-07-05T01:30:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:RPCRSTY6KJ5CRSIBYAHXR2YYRX","target":"record","payload":{"canonical_record":{"source":{"id":"2007.08525","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-07-16T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"de13d6950dd616eb631aae12c9127f5bbc93eaf6ce9b8496e59458ff40aaba32","abstract_canon_sha256":"d2bce83d5a7ca6e9fe8d71c411cf385ec52b51b953c87f0a471465e040f49734"},"schema_version":"1.0"},"canonical_sha256":"8bc5194f1e527a28c901c00f78eb188dde388ac949fb0c172de86c760641fba4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:30:35.495810Z","signature_b64":"NQlWvxqpUe08+LodqkCTwWhjtuINRFW7E7oOqaX2gpRJE2Vpt1WF3eZJmm2VC4sFYRyM5/Ibl0nlT86xO+foCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8bc5194f1e527a28c901c00f78eb188dde388ac949fb0c172de86c760641fba4","last_reissued_at":"2026-07-05T01:30:35.495264Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:30:35.495264Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.08525","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:30:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6Q6ro7Fv719ho1mADW7z7vVGejFNVfMyicp3GW6F+m6YHFkdURxsiQjoB7yFp5S/FVEB/gVCtgEVAoPk1KxADw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T12:10:24.573709Z"},"content_sha256":"08583b3a85fd142e4fc1c5e7f083aca597a48188161e6bede15e8a0a7f2aff57","schema_version":"1.0","event_id":"sha256:08583b3a85fd142e4fc1c5e7f083aca597a48188161e6bede15e8a0a7f2aff57"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:RPCRSTY6KJ5CRSIBYAHXR2YYRX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Discovery of a Hidden Broad Line AGN in a Bulgeless Galaxy: Keck NIR Spectroscopic Observations of SDSS J085153.64+392611.76","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Gabriela Canalizo, Ryan W. Pfeifle, Shobita Satyapal, Thomas Bohn","submitted_at":"2020-07-16T18:00:00Z","abstract_excerpt":"We report the discovery of a buried, active supermassive black hole in SDSS J085153.64+392611.76, a bulgeless Seyfert 2 (Sy2) galaxy. Keck near-infrared observations reveal a hidden broad line region, allowing for the rare case where strong constraints can be placed on both the black hole mass and bulge component. Using virial mass estimators, we obtain a black hole mass of log($M_{\\rm{BH}}/M_{\\odot}$) = $6.78 \\pm 0.50$. This is one of the only Sy2 AGN hosted in a bulgeless galaxy with a virial black hole mass estimate and could provide important constraints on the formation scenarios of the b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.08525","kind":"arxiv","version":2},"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/2007.08525/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":"2026-07-05T01:30:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7ArKEvMfNMgp7oI9UUKeTtRzFLN2yufab5w/tTe9cPZDmltIHAT4lK31aJCGIaXKBLHu+DnSTv6wRM+bSoqqAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T12:10:24.574077Z"},"content_sha256":"d4c3ab2975622d346c5e64c1df5fe2d765693bba093cc4c86c5113ea2535d265","schema_version":"1.0","event_id":"sha256:d4c3ab2975622d346c5e64c1df5fe2d765693bba093cc4c86c5113ea2535d265"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RPCRSTY6KJ5CRSIBYAHXR2YYRX/bundle.json","state_url":"https://pith.science/pith/RPCRSTY6KJ5CRSIBYAHXR2YYRX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RPCRSTY6KJ5CRSIBYAHXR2YYRX/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":"2026-07-07T12:10:24Z","links":{"resolver":"https://pith.science/pith/RPCRSTY6KJ5CRSIBYAHXR2YYRX","bundle":"https://pith.science/pith/RPCRSTY6KJ5CRSIBYAHXR2YYRX/bundle.json","state":"https://pith.science/pith/RPCRSTY6KJ5CRSIBYAHXR2YYRX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RPCRSTY6KJ5CRSIBYAHXR2YYRX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:RPCRSTY6KJ5CRSIBYAHXR2YYRX","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":"d2bce83d5a7ca6e9fe8d71c411cf385ec52b51b953c87f0a471465e040f49734","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-07-16T18:00:00Z","title_canon_sha256":"de13d6950dd616eb631aae12c9127f5bbc93eaf6ce9b8496e59458ff40aaba32"},"schema_version":"1.0","source":{"id":"2007.08525","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.08525","created_at":"2026-07-05T01:30:35Z"},{"alias_kind":"arxiv_version","alias_value":"2007.08525v2","created_at":"2026-07-05T01:30:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.08525","created_at":"2026-07-05T01:30:35Z"},{"alias_kind":"pith_short_12","alias_value":"RPCRSTY6KJ5C","created_at":"2026-07-05T01:30:35Z"},{"alias_kind":"pith_short_16","alias_value":"RPCRSTY6KJ5CRSIB","created_at":"2026-07-05T01:30:35Z"},{"alias_kind":"pith_short_8","alias_value":"RPCRSTY6","created_at":"2026-07-05T01:30:35Z"}],"graph_snapshots":[{"event_id":"sha256:d4c3ab2975622d346c5e64c1df5fe2d765693bba093cc4c86c5113ea2535d265","target":"graph","created_at":"2026-07-05T01:30:35Z","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/2007.08525/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the discovery of a buried, active supermassive black hole in SDSS J085153.64+392611.76, a bulgeless Seyfert 2 (Sy2) galaxy. Keck near-infrared observations reveal a hidden broad line region, allowing for the rare case where strong constraints can be placed on both the black hole mass and bulge component. Using virial mass estimators, we obtain a black hole mass of log($M_{\\rm{BH}}/M_{\\odot}$) = $6.78 \\pm 0.50$. This is one of the only Sy2 AGN hosted in a bulgeless galaxy with a virial black hole mass estimate and could provide important constraints on the formation scenarios of the b","authors_text":"Gabriela Canalizo, Ryan W. Pfeifle, Shobita Satyapal, Thomas Bohn","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-07-16T18:00:00Z","title":"The Discovery of a Hidden Broad Line AGN in a Bulgeless Galaxy: Keck NIR Spectroscopic Observations of SDSS J085153.64+392611.76"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.08525","kind":"arxiv","version":2},"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":"sha256:08583b3a85fd142e4fc1c5e7f083aca597a48188161e6bede15e8a0a7f2aff57","target":"record","created_at":"2026-07-05T01:30:35Z","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":"d2bce83d5a7ca6e9fe8d71c411cf385ec52b51b953c87f0a471465e040f49734","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-07-16T18:00:00Z","title_canon_sha256":"de13d6950dd616eb631aae12c9127f5bbc93eaf6ce9b8496e59458ff40aaba32"},"schema_version":"1.0","source":{"id":"2007.08525","kind":"arxiv","version":2}},"canonical_sha256":"8bc5194f1e527a28c901c00f78eb188dde388ac949fb0c172de86c760641fba4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8bc5194f1e527a28c901c00f78eb188dde388ac949fb0c172de86c760641fba4","first_computed_at":"2026-07-05T01:30:35.495264Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:30:35.495264Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NQlWvxqpUe08+LodqkCTwWhjtuINRFW7E7oOqaX2gpRJE2Vpt1WF3eZJmm2VC4sFYRyM5/Ibl0nlT86xO+foCw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:30:35.495810Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.08525","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:08583b3a85fd142e4fc1c5e7f083aca597a48188161e6bede15e8a0a7f2aff57","sha256:d4c3ab2975622d346c5e64c1df5fe2d765693bba093cc4c86c5113ea2535d265"],"state_sha256":"61fc50e93b8720a8d2f6984c5816f0e0e25327e43aaf2cca9b63b9a09f0e47eb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NsXgVkvWwFAi5wLll0p29XWSKY/kR4RswdZVw3igrLaBTQWCmLiBdCv2d8JiE5PEwXAOpA7kFsKwbsQvXbg5Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T12:10:24.576021Z","bundle_sha256":"7bbde341463c4a582251193ba5b01a4a395f0ea6b9dcbf05c5988f357e9f03ff"}}