{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:4JZE7WMAW7IFFEW2ASBAPVCGY2","short_pith_number":"pith:4JZE7WMA","canonical_record":{"source":{"id":"1101.5154","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-26T21:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"39c8ac4a8971a6ff452a9bcd36c56d7aa7e0f1c57deb1902648cc9b6553b49a7","abstract_canon_sha256":"673bf5c38ec68ec776d4ccd00bfd67f07c1464ef8aa4b47e2352a246c5739c93"},"schema_version":"1.0"},"canonical_sha256":"e2724fd980b7d05292da048207d446c68368121d5d60f665c0a4e9023eca3798","source":{"kind":"arxiv","id":"1101.5154","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.5154","created_at":"2026-05-18T02:03:21Z"},{"alias_kind":"arxiv_version","alias_value":"1101.5154v1","created_at":"2026-05-18T02:03:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.5154","created_at":"2026-05-18T02:03:21Z"},{"alias_kind":"pith_short_12","alias_value":"4JZE7WMAW7IF","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4JZE7WMAW7IFFEW2","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4JZE7WMA","created_at":"2026-05-18T12:26:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:4JZE7WMAW7IFFEW2ASBAPVCGY2","target":"record","payload":{"canonical_record":{"source":{"id":"1101.5154","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-26T21:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"39c8ac4a8971a6ff452a9bcd36c56d7aa7e0f1c57deb1902648cc9b6553b49a7","abstract_canon_sha256":"673bf5c38ec68ec776d4ccd00bfd67f07c1464ef8aa4b47e2352a246c5739c93"},"schema_version":"1.0"},"canonical_sha256":"e2724fd980b7d05292da048207d446c68368121d5d60f665c0a4e9023eca3798","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:21.738571Z","signature_b64":"OMJ1Ul6nHzlPZ/rRdUFTTdPn3dpvBEPrhS4aHJxpJYmiApzZ4f0wDiQHxKGqnmPmLq2h2UGCvT5O2fKuhNZmAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e2724fd980b7d05292da048207d446c68368121d5d60f665c0a4e9023eca3798","last_reissued_at":"2026-05-18T02:03:21.737822Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:21.737822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1101.5154","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":"2026-05-18T02:03:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DLb1v203WEjmC9Meu2SkCDlOp6sczSKJ2spy0JU6CedsC2m5fN549oZ6NMPeUCZuLlhWFqrRDT5uEZJoZX4hAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T15:07:46.866380Z"},"content_sha256":"4e060b66db7d938d21204521b6421cec7460c5a09268656d40ff258325d882fe","schema_version":"1.0","event_id":"sha256:4e060b66db7d938d21204521b6421cec7460c5a09268656d40ff258325d882fe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:4JZE7WMAW7IFFEW2ASBAPVCGY2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two-dimensional H_alpha kinematics of bulgeless disk galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"C. Jakob Walcher, David Andersen, Hans-Walter Rix, Nadine Neumayer, Sebastian F. Sanchez, Torsten Boeker","submitted_at":"2011-01-26T21:00:01Z","abstract_excerpt":"We present two-dimensional H_alpha velocity fields for 20 late-type, disk-dominated spiral galaxies, the largest sample to date with high-resolution H_alpha velocity fields for bulgeless disks. From these data we derive rotation curves and the location of the kinematic centers. The galaxy sample was selected to contain nucleated and non-nucleated galaxies, which allows us to investigate what impact the gas kinematics in the host disk have on the presence (or absence) of a nuclear star cluster. In general, we find that the velocity fields span a broad range of morphologies. While some galaxies "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.5154","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":"2026-05-18T02:03:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2t68/ddWga68tGVqwpWtmOsSaF2QpAMY49mOoBLTa9neppyqcRUY55ck2odvZ2BH0wzVABNl7junvV0yVyr5Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T15:07:46.866731Z"},"content_sha256":"2697da31f3a20c544fb1e99ea24e8b1f3b7e5a8aaae51aa16d2bcd14096fc820","schema_version":"1.0","event_id":"sha256:2697da31f3a20c544fb1e99ea24e8b1f3b7e5a8aaae51aa16d2bcd14096fc820"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4JZE7WMAW7IFFEW2ASBAPVCGY2/bundle.json","state_url":"https://pith.science/pith/4JZE7WMAW7IFFEW2ASBAPVCGY2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4JZE7WMAW7IFFEW2ASBAPVCGY2/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":"2026-05-20T15:07:46Z","links":{"resolver":"https://pith.science/pith/4JZE7WMAW7IFFEW2ASBAPVCGY2","bundle":"https://pith.science/pith/4JZE7WMAW7IFFEW2ASBAPVCGY2/bundle.json","state":"https://pith.science/pith/4JZE7WMAW7IFFEW2ASBAPVCGY2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4JZE7WMAW7IFFEW2ASBAPVCGY2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:4JZE7WMAW7IFFEW2ASBAPVCGY2","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":"673bf5c38ec68ec776d4ccd00bfd67f07c1464ef8aa4b47e2352a246c5739c93","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-26T21:00:01Z","title_canon_sha256":"39c8ac4a8971a6ff452a9bcd36c56d7aa7e0f1c57deb1902648cc9b6553b49a7"},"schema_version":"1.0","source":{"id":"1101.5154","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.5154","created_at":"2026-05-18T02:03:21Z"},{"alias_kind":"arxiv_version","alias_value":"1101.5154v1","created_at":"2026-05-18T02:03:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.5154","created_at":"2026-05-18T02:03:21Z"},{"alias_kind":"pith_short_12","alias_value":"4JZE7WMAW7IF","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4JZE7WMAW7IFFEW2","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4JZE7WMA","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:2697da31f3a20c544fb1e99ea24e8b1f3b7e5a8aaae51aa16d2bcd14096fc820","target":"graph","created_at":"2026-05-18T02:03:21Z","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 two-dimensional H_alpha velocity fields for 20 late-type, disk-dominated spiral galaxies, the largest sample to date with high-resolution H_alpha velocity fields for bulgeless disks. From these data we derive rotation curves and the location of the kinematic centers. The galaxy sample was selected to contain nucleated and non-nucleated galaxies, which allows us to investigate what impact the gas kinematics in the host disk have on the presence (or absence) of a nuclear star cluster. In general, we find that the velocity fields span a broad range of morphologies. While some galaxies ","authors_text":"C. Jakob Walcher, David Andersen, Hans-Walter Rix, Nadine Neumayer, Sebastian F. Sanchez, Torsten Boeker","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-26T21:00:01Z","title":"Two-dimensional H_alpha kinematics of bulgeless disk galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.5154","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":"sha256:4e060b66db7d938d21204521b6421cec7460c5a09268656d40ff258325d882fe","target":"record","created_at":"2026-05-18T02:03:21Z","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":"673bf5c38ec68ec776d4ccd00bfd67f07c1464ef8aa4b47e2352a246c5739c93","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-26T21:00:01Z","title_canon_sha256":"39c8ac4a8971a6ff452a9bcd36c56d7aa7e0f1c57deb1902648cc9b6553b49a7"},"schema_version":"1.0","source":{"id":"1101.5154","kind":"arxiv","version":1}},"canonical_sha256":"e2724fd980b7d05292da048207d446c68368121d5d60f665c0a4e9023eca3798","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e2724fd980b7d05292da048207d446c68368121d5d60f665c0a4e9023eca3798","first_computed_at":"2026-05-18T02:03:21.737822Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:21.737822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OMJ1Ul6nHzlPZ/rRdUFTTdPn3dpvBEPrhS4aHJxpJYmiApzZ4f0wDiQHxKGqnmPmLq2h2UGCvT5O2fKuhNZmAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:21.738571Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.5154","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4e060b66db7d938d21204521b6421cec7460c5a09268656d40ff258325d882fe","sha256:2697da31f3a20c544fb1e99ea24e8b1f3b7e5a8aaae51aa16d2bcd14096fc820"],"state_sha256":"86b18c0e1960392d72e37c678d99c26b83078baf9fdf8ba6d92de40f12da5bb2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ffHXqKqmBbmHr+9HToyfmsidp3716EAZbh3lYCyswnQqaG6DI6UCjPHR3dFlbeQgdnkfoD8dQIVUCiZrPsxxDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T15:07:46.868660Z","bundle_sha256":"f88f8e2f47e9e0350633bf14373e82475dad6100720f11a2ea20346a81b8f932"}}