{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:BUXEZZSN5JEXZ56VZSG3KC45DM","short_pith_number":"pith:BUXEZZSN","canonical_record":{"source":{"id":"1711.08982","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-24T14:30:41Z","cross_cats_sorted":[],"title_canon_sha256":"fa31268ffaa224344724d3aac1d76aeb51ea1a536ee24dc63a5c6acc7dc78634","abstract_canon_sha256":"8f4d02b48665b93ad6e38aa45d9d6e0f49aef9f0ae83f55c46dac0ff0ea789a8"},"schema_version":"1.0"},"canonical_sha256":"0d2e4ce64dea497cf7d5cc8db50b9d1b3c7eabb2152809aa5c6dcef97460e9a6","source":{"kind":"arxiv","id":"1711.08982","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.08982","created_at":"2026-05-18T00:17:08Z"},{"alias_kind":"arxiv_version","alias_value":"1711.08982v1","created_at":"2026-05-18T00:17:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.08982","created_at":"2026-05-18T00:17:08Z"},{"alias_kind":"pith_short_12","alias_value":"BUXEZZSN5JEX","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_16","alias_value":"BUXEZZSN5JEXZ56V","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_8","alias_value":"BUXEZZSN","created_at":"2026-05-18T12:31:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:BUXEZZSN5JEXZ56VZSG3KC45DM","target":"record","payload":{"canonical_record":{"source":{"id":"1711.08982","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-24T14:30:41Z","cross_cats_sorted":[],"title_canon_sha256":"fa31268ffaa224344724d3aac1d76aeb51ea1a536ee24dc63a5c6acc7dc78634","abstract_canon_sha256":"8f4d02b48665b93ad6e38aa45d9d6e0f49aef9f0ae83f55c46dac0ff0ea789a8"},"schema_version":"1.0"},"canonical_sha256":"0d2e4ce64dea497cf7d5cc8db50b9d1b3c7eabb2152809aa5c6dcef97460e9a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:08.481869Z","signature_b64":"6p9TZJLELw9XlW2K81lCOFOMENTnWOKFwxV6Xq1dsKxjMAEUUdo8aMu4/IZ9R9QVayXIUztRyMDvdIH90cFeDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0d2e4ce64dea497cf7d5cc8db50b9d1b3c7eabb2152809aa5c6dcef97460e9a6","last_reissued_at":"2026-05-18T00:17:08.481112Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:08.481112Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.08982","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":"2026-05-18T00:17:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P1p2MdFkmHoH8cRBfC0KDMHjFKYigVYI69fqs3ZW1pB+7Yv3f9TI9ltKNzjZqeZqlXhCuGDCagHyFQXVjqsaBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T13:48:01.663300Z"},"content_sha256":"a71d699b6dd8344a21427421a2583fefe18a46274df1b495940655b2a141460a","schema_version":"1.0","event_id":"sha256:a71d699b6dd8344a21427421a2583fefe18a46274df1b495940655b2a141460a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:BUXEZZSN5JEXZ56VZSG3KC45DM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"MUSE observations of the counter-rotating nuclear ring in NGC 7742","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Bruce G. Elmegreen, Jes\\'us Falc\\'on-Barroso, Johan H. Knapen, Lodovico Coccato, Marc Sarzi, Thomas P. K. Martinsson, Tim de Zeeuw","submitted_at":"2017-11-24T14:30:41Z","abstract_excerpt":"We present results from MUSE observations of the nearly face-on disk galaxy NGC 7742. This galaxy hosts a spectacular nuclear ring of enhanced star formation, which is unusual in that it is hosted by a non-barred galaxy, and also because this star formation is most likely fuelled by externally accreted gas that counter-rotates with respect to its main stellar body. We use the MUSE data to derive the star-formation history (SFH) and accurately measure the stellar and ionized-gas kinematics of NGC7742 in its nuclear, bulge, ring, and disk regions. We map the previously known gas counter-rotation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.08982","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":"2026-05-18T00:17:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bQrIvHfiNsYLp5zPLxGcoLAm58TjiHVANZURIA9HGMDui7KD5YCKs1vYSNPuz2Dpckx1Ku1+lvRzb8Dp27MwCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T13:48:01.663664Z"},"content_sha256":"f147b76f37e330dc4bd9515135849ff106b7f1c07b904ee1ca30beb473a72849","schema_version":"1.0","event_id":"sha256:f147b76f37e330dc4bd9515135849ff106b7f1c07b904ee1ca30beb473a72849"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BUXEZZSN5JEXZ56VZSG3KC45DM/bundle.json","state_url":"https://pith.science/pith/BUXEZZSN5JEXZ56VZSG3KC45DM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BUXEZZSN5JEXZ56VZSG3KC45DM/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":"2026-06-01T13:48:01Z","links":{"resolver":"https://pith.science/pith/BUXEZZSN5JEXZ56VZSG3KC45DM","bundle":"https://pith.science/pith/BUXEZZSN5JEXZ56VZSG3KC45DM/bundle.json","state":"https://pith.science/pith/BUXEZZSN5JEXZ56VZSG3KC45DM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BUXEZZSN5JEXZ56VZSG3KC45DM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:BUXEZZSN5JEXZ56VZSG3KC45DM","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":"8f4d02b48665b93ad6e38aa45d9d6e0f49aef9f0ae83f55c46dac0ff0ea789a8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-24T14:30:41Z","title_canon_sha256":"fa31268ffaa224344724d3aac1d76aeb51ea1a536ee24dc63a5c6acc7dc78634"},"schema_version":"1.0","source":{"id":"1711.08982","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.08982","created_at":"2026-05-18T00:17:08Z"},{"alias_kind":"arxiv_version","alias_value":"1711.08982v1","created_at":"2026-05-18T00:17:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.08982","created_at":"2026-05-18T00:17:08Z"},{"alias_kind":"pith_short_12","alias_value":"BUXEZZSN5JEX","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_16","alias_value":"BUXEZZSN5JEXZ56V","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_8","alias_value":"BUXEZZSN","created_at":"2026-05-18T12:31:08Z"}],"graph_snapshots":[{"event_id":"sha256:f147b76f37e330dc4bd9515135849ff106b7f1c07b904ee1ca30beb473a72849","target":"graph","created_at":"2026-05-18T00:17:08Z","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 results from MUSE observations of the nearly face-on disk galaxy NGC 7742. This galaxy hosts a spectacular nuclear ring of enhanced star formation, which is unusual in that it is hosted by a non-barred galaxy, and also because this star formation is most likely fuelled by externally accreted gas that counter-rotates with respect to its main stellar body. We use the MUSE data to derive the star-formation history (SFH) and accurately measure the stellar and ionized-gas kinematics of NGC7742 in its nuclear, bulge, ring, and disk regions. We map the previously known gas counter-rotation","authors_text":"Bruce G. Elmegreen, Jes\\'us Falc\\'on-Barroso, Johan H. Knapen, Lodovico Coccato, Marc Sarzi, Thomas P. K. Martinsson, Tim de Zeeuw","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-24T14:30:41Z","title":"MUSE observations of the counter-rotating nuclear ring in NGC 7742"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.08982","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:a71d699b6dd8344a21427421a2583fefe18a46274df1b495940655b2a141460a","target":"record","created_at":"2026-05-18T00:17:08Z","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":"8f4d02b48665b93ad6e38aa45d9d6e0f49aef9f0ae83f55c46dac0ff0ea789a8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-24T14:30:41Z","title_canon_sha256":"fa31268ffaa224344724d3aac1d76aeb51ea1a536ee24dc63a5c6acc7dc78634"},"schema_version":"1.0","source":{"id":"1711.08982","kind":"arxiv","version":1}},"canonical_sha256":"0d2e4ce64dea497cf7d5cc8db50b9d1b3c7eabb2152809aa5c6dcef97460e9a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0d2e4ce64dea497cf7d5cc8db50b9d1b3c7eabb2152809aa5c6dcef97460e9a6","first_computed_at":"2026-05-18T00:17:08.481112Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:17:08.481112Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6p9TZJLELw9XlW2K81lCOFOMENTnWOKFwxV6Xq1dsKxjMAEUUdo8aMu4/IZ9R9QVayXIUztRyMDvdIH90cFeDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:17:08.481869Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.08982","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a71d699b6dd8344a21427421a2583fefe18a46274df1b495940655b2a141460a","sha256:f147b76f37e330dc4bd9515135849ff106b7f1c07b904ee1ca30beb473a72849"],"state_sha256":"df51f10334eb02e1480b902059c3de1f389defbe5bb0efc25a9cd91400906f8a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xvfNmD6XMw5kUX1MwvFPhenDcC43N8OxPCrHs0L68OVFGWmrr8NLmF6Aar1LmgXncVd72KsYMvAgwOgcFKvgBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T13:48:01.665620Z","bundle_sha256":"b7c8407a15b93ec904087b0e19980331aa3e33dda9ea7b052203ce5616de69cc"}}