{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:WL6AYQLDYF5HCZLVR7OTPGGIUW","short_pith_number":"pith:WL6AYQLD","canonical_record":{"source":{"id":"2106.03858","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-06-07T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"08fe975527ecbc46c28c1d2440e4dc6900c4e00963656f7fc06c0c76f2f3abf7","abstract_canon_sha256":"6a1d9247e293c99b440540bf3b7052bf724d1b1809b5ee8044110d8bc24119a0"},"schema_version":"1.0"},"canonical_sha256":"b2fc0c4163c17a7165758fdd3798c8a5a264ff8483ec05185f7337bb7bae0647","source":{"kind":"arxiv","id":"2106.03858","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.03858","created_at":"2026-07-05T10:16:57Z"},{"alias_kind":"arxiv_version","alias_value":"2106.03858v1","created_at":"2026-07-05T10:16:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.03858","created_at":"2026-07-05T10:16:57Z"},{"alias_kind":"pith_short_12","alias_value":"WL6AYQLDYF5H","created_at":"2026-07-05T10:16:57Z"},{"alias_kind":"pith_short_16","alias_value":"WL6AYQLDYF5HCZLV","created_at":"2026-07-05T10:16:57Z"},{"alias_kind":"pith_short_8","alias_value":"WL6AYQLD","created_at":"2026-07-05T10:16:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:WL6AYQLDYF5HCZLVR7OTPGGIUW","target":"record","payload":{"canonical_record":{"source":{"id":"2106.03858","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-06-07T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"08fe975527ecbc46c28c1d2440e4dc6900c4e00963656f7fc06c0c76f2f3abf7","abstract_canon_sha256":"6a1d9247e293c99b440540bf3b7052bf724d1b1809b5ee8044110d8bc24119a0"},"schema_version":"1.0"},"canonical_sha256":"b2fc0c4163c17a7165758fdd3798c8a5a264ff8483ec05185f7337bb7bae0647","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:16:57.066473Z","signature_b64":"TQXaM2vFnPWx7whKwweKJKtOEOSxE06KGG8RaT4+KRbNxVtmvGb9yVTSwHpEFM/zH1vyMjVy6+qXJtYUXZv6BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b2fc0c4163c17a7165758fdd3798c8a5a264ff8483ec05185f7337bb7bae0647","last_reissued_at":"2026-07-05T10:16:57.065986Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:16:57.065986Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2106.03858","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":"2026-07-05T10:16:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AJWxdZ1CgmrQsaiP+LOuu+yU9Fa1pYN6wfeGlKoi3XLYf26THxqI5Q0/4EsCWaMuVnfXKvR+AlalDyow+j65Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T04:31:13.455525Z"},"content_sha256":"1a59ba3d0449bce9a78efdc86db299494118e8441d1838b02e80c736f46b16a4","schema_version":"1.0","event_id":"sha256:1a59ba3d0449bce9a78efdc86db299494118e8441d1838b02e80c736f46b16a4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:WL6AYQLDYF5HCZLVR7OTPGGIUW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Discovery and origins of giant optical nebulae surrounding quasar PKS 0454-22","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Hsiao-Wen Chen, Jakob M. Helton, Jenny E. Greene, Sean D. Johnson","submitted_at":"2021-06-07T18:00:00Z","abstract_excerpt":"We report optical integral-field spectroscopy in the field of one of the most luminous quasars in the $z < 1$ Universe, PKS0454-22, with the Multi-Unit Spectroscopic Explorer. These data enable the discovery of three large ionized nebulae emitting in [O II], H$\\beta$, and [O III] with projected areas of $1720, \\ 1520,$ and $130 \\ \\mathrm{pkpc}^2$, which we refer to as N1, N2, and N3, respectively. N1 spatially and kinematically surrounds the quasar host and five nearby galaxies. The morphology and kinematics of N1 are most consistent with stripped interstellar medium resulting from ongoing int"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.03858","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/2106.03858/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":"2026-07-05T10:16:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"feQjMQAq1/Yg703Za+kX4EnxKpPgdWInYwHmiyZylRX9AhQSyVhuySD1PSyao1/lxVkT22cUfGnfyb0VGyYxAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T04:31:13.456325Z"},"content_sha256":"8ae0435d438cded389d1c143cdb65e52eee210d7ef5b5755adf4f71303cac91d","schema_version":"1.0","event_id":"sha256:8ae0435d438cded389d1c143cdb65e52eee210d7ef5b5755adf4f71303cac91d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WL6AYQLDYF5HCZLVR7OTPGGIUW/bundle.json","state_url":"https://pith.science/pith/WL6AYQLDYF5HCZLVR7OTPGGIUW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WL6AYQLDYF5HCZLVR7OTPGGIUW/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":"2026-08-06T04:31:13Z","links":{"resolver":"https://pith.science/pith/WL6AYQLDYF5HCZLVR7OTPGGIUW","bundle":"https://pith.science/pith/WL6AYQLDYF5HCZLVR7OTPGGIUW/bundle.json","state":"https://pith.science/pith/WL6AYQLDYF5HCZLVR7OTPGGIUW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WL6AYQLDYF5HCZLVR7OTPGGIUW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:WL6AYQLDYF5HCZLVR7OTPGGIUW","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":"6a1d9247e293c99b440540bf3b7052bf724d1b1809b5ee8044110d8bc24119a0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-06-07T18:00:00Z","title_canon_sha256":"08fe975527ecbc46c28c1d2440e4dc6900c4e00963656f7fc06c0c76f2f3abf7"},"schema_version":"1.0","source":{"id":"2106.03858","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.03858","created_at":"2026-07-05T10:16:57Z"},{"alias_kind":"arxiv_version","alias_value":"2106.03858v1","created_at":"2026-07-05T10:16:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.03858","created_at":"2026-07-05T10:16:57Z"},{"alias_kind":"pith_short_12","alias_value":"WL6AYQLDYF5H","created_at":"2026-07-05T10:16:57Z"},{"alias_kind":"pith_short_16","alias_value":"WL6AYQLDYF5HCZLV","created_at":"2026-07-05T10:16:57Z"},{"alias_kind":"pith_short_8","alias_value":"WL6AYQLD","created_at":"2026-07-05T10:16:57Z"}],"graph_snapshots":[{"event_id":"sha256:8ae0435d438cded389d1c143cdb65e52eee210d7ef5b5755adf4f71303cac91d","target":"graph","created_at":"2026-07-05T10:16:57Z","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/2106.03858/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report optical integral-field spectroscopy in the field of one of the most luminous quasars in the $z < 1$ Universe, PKS0454-22, with the Multi-Unit Spectroscopic Explorer. These data enable the discovery of three large ionized nebulae emitting in [O II], H$\\beta$, and [O III] with projected areas of $1720, \\ 1520,$ and $130 \\ \\mathrm{pkpc}^2$, which we refer to as N1, N2, and N3, respectively. N1 spatially and kinematically surrounds the quasar host and five nearby galaxies. The morphology and kinematics of N1 are most consistent with stripped interstellar medium resulting from ongoing int","authors_text":"Hsiao-Wen Chen, Jakob M. Helton, Jenny E. Greene, Sean D. Johnson","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-06-07T18:00:00Z","title":"Discovery and origins of giant optical nebulae surrounding quasar PKS 0454-22"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.03858","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":"sha256:1a59ba3d0449bce9a78efdc86db299494118e8441d1838b02e80c736f46b16a4","target":"record","created_at":"2026-07-05T10:16:57Z","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":"6a1d9247e293c99b440540bf3b7052bf724d1b1809b5ee8044110d8bc24119a0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-06-07T18:00:00Z","title_canon_sha256":"08fe975527ecbc46c28c1d2440e4dc6900c4e00963656f7fc06c0c76f2f3abf7"},"schema_version":"1.0","source":{"id":"2106.03858","kind":"arxiv","version":1}},"canonical_sha256":"b2fc0c4163c17a7165758fdd3798c8a5a264ff8483ec05185f7337bb7bae0647","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b2fc0c4163c17a7165758fdd3798c8a5a264ff8483ec05185f7337bb7bae0647","first_computed_at":"2026-07-05T10:16:57.065986Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:16:57.065986Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TQXaM2vFnPWx7whKwweKJKtOEOSxE06KGG8RaT4+KRbNxVtmvGb9yVTSwHpEFM/zH1vyMjVy6+qXJtYUXZv6BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:16:57.066473Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.03858","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a59ba3d0449bce9a78efdc86db299494118e8441d1838b02e80c736f46b16a4","sha256:8ae0435d438cded389d1c143cdb65e52eee210d7ef5b5755adf4f71303cac91d"],"state_sha256":"93d33951b464e846fc6152e41e7faecc001d84585ffad83eb396e2d76824ea2d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xkFqwjtcwRszhWwMvhomiRDcpuR8OpjI837ZUeGB+iR566E3L9Z1ez6o9WA1NMVS6+5m8DCIukVVJea4cJjiDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T04:31:13.460539Z","bundle_sha256":"6dd98fea93128e0c79db7f842b58d0208e8b2eed65b2c857302d0569b62b683c"}}