{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:WJK73FVOY4JVPZ7TIXJSM3QPFL","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":"12a4bbc72b2d24a5a8fdb0e1f4e564022bf6a58fcc6f6713ea3b52ff392df4c9","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-28T21:00:09Z","title_canon_sha256":"c920b540d4e12c1a3b742b0f98134be7d65602d92363a6ee45f80f1b6aabfa5e"},"schema_version":"1.0","source":{"id":"1211.6746","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.6746","created_at":"2026-05-18T01:52:53Z"},{"alias_kind":"arxiv_version","alias_value":"1211.6746v1","created_at":"2026-05-18T01:52:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.6746","created_at":"2026-05-18T01:52:53Z"},{"alias_kind":"pith_short_12","alias_value":"WJK73FVOY4JV","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"WJK73FVOY4JVPZ7T","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"WJK73FVO","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:c9a1366d1726db9e873869a66552e88b16d207c18ac391c9b5258b74d3990cf7","target":"graph","created_at":"2026-05-18T01:52:53Z","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 a study of optically emitting Supernova Remnants (SNRs) in six nearby galaxies (NGC 2403, NGC 3077, NGC 4214, NGC 4395, NGC 4449 and NGC 5204) based on deep narrow band H{\\alpha} and [SII] images as well as spectroscopic observations. The SNR classification was based on the detected sources that fulfill the well-established emission line flux criterion of [SII]/H{\\alpha} > 0.4. This study revealed ~400 photometric SNRs down to a limiting H{\\alpha} flux of 10^(-15) erg sec^(-1) cm^(-2). Spectroscopic observations confirmed the shock-excited nature of 56 out of the 96 sou","authors_text":"A. Zezas, I. Leonidaki, P. Boumis","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-28T21:00:09Z","title":"A multi-wavelength study of Supernova Remnants in six nearby galaxies. II. New optically selected Supernova Remnants"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.6746","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":"sha256:68cb5385840556b65aeed4d4b3014fc786781b0ab1aa855576c4cbd8530f8832","target":"record","created_at":"2026-05-18T01:52:53Z","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":"12a4bbc72b2d24a5a8fdb0e1f4e564022bf6a58fcc6f6713ea3b52ff392df4c9","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-28T21:00:09Z","title_canon_sha256":"c920b540d4e12c1a3b742b0f98134be7d65602d92363a6ee45f80f1b6aabfa5e"},"schema_version":"1.0","source":{"id":"1211.6746","kind":"arxiv","version":1}},"canonical_sha256":"b255fd96aec71357e7f345d3266e0f2ae3a8761d276d88f7fb4b70e7740b7cb2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b255fd96aec71357e7f345d3266e0f2ae3a8761d276d88f7fb4b70e7740b7cb2","first_computed_at":"2026-05-18T01:52:53.607681Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:53.607681Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RlIZYNUcd3fm2cacOdAjHC+RkswTPTT514N4g6Nhvco6fOfX3ziiFIeJM56Kfcj3VuL2cXBAr/QqDQOdmq4xBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:53.608076Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.6746","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:68cb5385840556b65aeed4d4b3014fc786781b0ab1aa855576c4cbd8530f8832","sha256:c9a1366d1726db9e873869a66552e88b16d207c18ac391c9b5258b74d3990cf7"],"state_sha256":"e254a7d55a784bf9d290d0f1f26f64590ea84a0037209e63f7008dd2418ab57f"}