{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:T5GXP7XT7BSVLJO3BUEGFR6G6J","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":"df047fb008d3bfb26d4db86506f399dec3930f1cdd8ccb8cacfaca55df47404c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-07T20:47:19Z","title_canon_sha256":"2b95bbc2d39110c6e7634c6ab1f3fc9a4241698166037e49a5b04fff690218c4"},"schema_version":"1.0","source":{"id":"1509.02186","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.02186","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"arxiv_version","alias_value":"1509.02186v1","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.02186","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"pith_short_12","alias_value":"T5GXP7XT7BSV","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"T5GXP7XT7BSVLJO3","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"T5GXP7XT","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:d705eadc425a5fd158872036ef63a6ded964d2739a35f01236cd8da185b37b24","target":"graph","created_at":"2026-05-18T01:18:43Z","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 analysed 385 galactic spectra from the Sloan Digital Sky Survey Data Release 7 (SDSS-DR7) that belong to the catalog of isolated pairs of galaxies by Karachentsev. The spectra corresponds to physical pairs of galaxies as defined by V $\\leq$ 1200 Km/s and a pair separation $\\leq$ 100 kpc. We search for the incidence of nuclear activity, both thermal (star-forming) and non-thermal -Active Galactic Nuclei (AGN). After a careful extraction of the nuclear spectra, we use diagnostic diagrams and find that the incidence of AGN activity is 48 \\% in the paired galaxies with emission lines and 40\\% f","authors_text":"Ascensi\\'on del Olmo (2), Deborah Dultzin (1), Francisco J. Hern\\'andez-Ibarra (1), Jaime Perea (2), Jes\\'us Gonz\\'alez (1), Sandro Mendoza-Castrej\\'on (1), Theodoros Bitsakis (1) ((1) Instituto de Astronom\\'ia, UNAM (2) Instituto de Astrof\\'isica de Andalucia), Yair Krongold (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-07T20:47:19Z","title":"Induced nuclear activity in galaxy pairs with different morphologies (E+E), (E+S) and (S+S)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.02186","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:d30c7954061a944cefa91ccf4947da4c4d388833c9cd31f30fde72a8cc1e8ceb","target":"record","created_at":"2026-05-18T01:18:43Z","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":"df047fb008d3bfb26d4db86506f399dec3930f1cdd8ccb8cacfaca55df47404c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-07T20:47:19Z","title_canon_sha256":"2b95bbc2d39110c6e7634c6ab1f3fc9a4241698166037e49a5b04fff690218c4"},"schema_version":"1.0","source":{"id":"1509.02186","kind":"arxiv","version":1}},"canonical_sha256":"9f4d77fef3f86555a5db0d0862c7c6f25914e1fe36b79e2c8d6149b80d380ac9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f4d77fef3f86555a5db0d0862c7c6f25914e1fe36b79e2c8d6149b80d380ac9","first_computed_at":"2026-05-18T01:18:43.250754Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:43.250754Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"O2Hl5fbVV1l2RkCaUPXFAyapopPcjRAv/wMeBrmfEJCcDe5XDYYMjCqjDxvkh4abxaavKNdT/kZoaLAvPL0WBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:43.251397Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.02186","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d30c7954061a944cefa91ccf4947da4c4d388833c9cd31f30fde72a8cc1e8ceb","sha256:d705eadc425a5fd158872036ef63a6ded964d2739a35f01236cd8da185b37b24"],"state_sha256":"7e8bdb07b893c3afa16243f0c05c4fa529ee3177706abb4e8906c8a2d56b020e"}