{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:56E22IEKKPJ6WHOTAVVUG6VUV5","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":"8e4293fa8693c73ded525661e13d504c787ba1e455801b69821f6b75da3d7468","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-12-19T21:00:12Z","title_canon_sha256":"c3dc752a2ab293d92d26757f31debba1d2f5a4d621c53aac8e01e05c20715115"},"schema_version":"1.0","source":{"id":"1412.6530","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.6530","created_at":"2026-05-18T01:41:16Z"},{"alias_kind":"arxiv_version","alias_value":"1412.6530v2","created_at":"2026-05-18T01:41:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.6530","created_at":"2026-05-18T01:41:16Z"},{"alias_kind":"pith_short_12","alias_value":"56E22IEKKPJ6","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"56E22IEKKPJ6WHOT","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"56E22IEK","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:ed6d16340647b0c3abe51b3bffedd4d9cceabf4211f1ba5312899ee6084e6267","target":"graph","created_at":"2026-05-18T01:41:16Z","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 optical and near-infrared (NIR) photometry of 28 gamma-ray bursts (GRBs) detected by the \\textit{Swift} satellite and rapidly observed by the Reionization and Transients Infrared/Optical (RATIR) camera. We compare the optical flux at fiducial times of 5.5 and 11 hours after the high-energy trigger to that in the X-ray regime to quantify optical darkness. 46$\\pm$9 per cent (13/28) of all bursts in our sample and 55$\\pm$10 per cent (13/26) of long GRBs are optically dark, which is statistically consistently with previous studies. Fitting RATIR optical and NIR spectral energy distribut","authors_text":"A. Cucchiara, A. M. Watson, A. S. Kutyrev, C. G. Rom\\'an-Z\\'u\\~niga, C. R. Klein, E. Ramirez-Ruiz, E. Troja, H. Moseley, J. A. de Diego, J. Gonz\\'alez, J. S. Bloom, J. X. Prochaska, L. Georgiev, M. G. Richer, N. Gehrels, N. R. Butler, O. D. Fox, O. M. Littlejohns, W. H. Lee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-12-19T21:00:12Z","title":"A detailed study of the optical attenuation of gamma-ray bursts in the Swift era"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.6530","kind":"arxiv","version":2},"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":"sha256:89f5b803983d94efae2065abe6e56e1698142fd2ff25bfb56509c172f14752ea","target":"record","created_at":"2026-05-18T01:41:16Z","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":"8e4293fa8693c73ded525661e13d504c787ba1e455801b69821f6b75da3d7468","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-12-19T21:00:12Z","title_canon_sha256":"c3dc752a2ab293d92d26757f31debba1d2f5a4d621c53aac8e01e05c20715115"},"schema_version":"1.0","source":{"id":"1412.6530","kind":"arxiv","version":2}},"canonical_sha256":"ef89ad208a53d3eb1dd3056b437ab4af79da41c5815a5639be25cf813cc0e5ef","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ef89ad208a53d3eb1dd3056b437ab4af79da41c5815a5639be25cf813cc0e5ef","first_computed_at":"2026-05-18T01:41:16.383759Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:16.383759Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Oky+wkhd+mNArZVhfacFrrGfeIM7cUZN/DNWsOgA2IBF35VDxnsaXG8jFfiKLeAF8B57B4r2z75otRKnBVZHAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:16.384306Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.6530","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:89f5b803983d94efae2065abe6e56e1698142fd2ff25bfb56509c172f14752ea","sha256:ed6d16340647b0c3abe51b3bffedd4d9cceabf4211f1ba5312899ee6084e6267"],"state_sha256":"f36a06d25a87cc1fbcdb6e6a52ed6b5a65c90687f23bc36957aec32adbb90994"}