{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:YVZQ4FM2VHYTMY27VGSAFP4QCT","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":"b34e1859fa71c9681487bef3e240ed7811de7f77b9e44069c9ad264ceb8de766","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-22T20:00:01Z","title_canon_sha256":"08cf3a44afa1be5245341c4cd57b5968a039f02a206f2582e3cd7a0e0aa839f1"},"schema_version":"1.0","source":{"id":"1108.4410","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.4410","created_at":"2026-05-18T02:00:49Z"},{"alias_kind":"arxiv_version","alias_value":"1108.4410v1","created_at":"2026-05-18T02:00:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.4410","created_at":"2026-05-18T02:00:49Z"},{"alias_kind":"pith_short_12","alias_value":"YVZQ4FM2VHYT","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"YVZQ4FM2VHYTMY27","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"YVZQ4FM2","created_at":"2026-05-18T12:26:47Z"}],"graph_snapshots":[{"event_id":"sha256:350092ef7094dc01733a5957cba646cb42a92107f9423320ef290bd2fb5dd2ea","target":"graph","created_at":"2026-05-18T02:00:49Z","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 a statistical observational study of the tidal dwarf (TD) population in the nearby Universe, by exploiting a large, homogeneous catalogue of galaxy mergers compiled from the SDSS. 95% of TD-producing mergers involve two spiral progenitors, while most remaining systems have at least one spiral progenitor. The fraction of TD-producing mergers where both parents are early-type galaxies is <2%, suggesting that TDs are unlikely to form in such mergers. The bulk of TD-producing systems inhabit a field environment and have mass ratios greater than 1:7 (the median value is 1:2.5). TDs formi","authors_text":"Chris Lintott, Daniel Darg, Joseph Silk, Kevin Schawinski, Sugata Kaviraj","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-22T20:00:01Z","title":"Tidal dwarf galaxies in the nearby Universe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.4410","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":"sha256:62a907a03da8780f28a20fac7e4af7ce4e3dc9b53115184f0762da8847947a59","target":"record","created_at":"2026-05-18T02:00:49Z","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":"b34e1859fa71c9681487bef3e240ed7811de7f77b9e44069c9ad264ceb8de766","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-22T20:00:01Z","title_canon_sha256":"08cf3a44afa1be5245341c4cd57b5968a039f02a206f2582e3cd7a0e0aa839f1"},"schema_version":"1.0","source":{"id":"1108.4410","kind":"arxiv","version":1}},"canonical_sha256":"c5730e159aa9f136635fa9a402bf9014d452bb67ba45337c21b4015d2da4d28a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c5730e159aa9f136635fa9a402bf9014d452bb67ba45337c21b4015d2da4d28a","first_computed_at":"2026-05-18T02:00:49.675439Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:49.675439Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GDcGp7dCVa1ksw8vjQw9Un11CNeDzuJ2JkmOH87q7osRVlsiY5jCOrmvAdIbt7en5E2R7Bd2u8yWCb7BvskVAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:49.676166Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.4410","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:62a907a03da8780f28a20fac7e4af7ce4e3dc9b53115184f0762da8847947a59","sha256:350092ef7094dc01733a5957cba646cb42a92107f9423320ef290bd2fb5dd2ea"],"state_sha256":"e6ded698b5c9b04de34630e596d124d84070835586ee5606dab649513c6ee2a5"}