{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:VMQFBTTREEDPYHW6H5SIPURFLX","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":"e7d344efce0f75ff612754cfb529f69b2cab1b44635ee313167231a1628eb78f","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-14T19:27:37Z","title_canon_sha256":"b53a63d9a200c0a4db5090a26fc361e500549f5eed02a7d1c5b05c155890a235"},"schema_version":"1.0","source":{"id":"1706.04647","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.04647","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"arxiv_version","alias_value":"1706.04647v1","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.04647","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"pith_short_12","alias_value":"VMQFBTTREEDP","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VMQFBTTREEDPYHW6","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VMQFBTTR","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:9ae7057414a7ff24ba8f209dae346e13da0be58ef7b749537321043019ff8513","target":"graph","created_at":"2026-05-18T00:39:31Z","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 constraints on Ks-band emission from one of the nearest short hard gamma-ray bursts, GRB 160821B, at z=0.16, at three epochs. We detect a reddened relativistic afterglow from the jetted emission in the first epoch but do not detect any excess kilonova emission in the second two epochs. We compare upper limits obtained with Keck I/MOSFIRE to multi-dimensional radiative transfer models of kilonovae, that employ composition-dependent nuclear heating and LTE opacities of heavy elements. We discuss eight models that combine toroidal dynamical ejecta and two types of wind and one model wi","authors_text":"Christopher L. Fryer, Mansi M. Kasliwal, Oleg Korobkin, Ryan M. Lau, Ryan Wollaeger","cross_cats":["astro-ph.IM","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-14T19:27:37Z","title":"Infrared emission from kilonovae: the case of the nearby short hard burst GRB 160821B"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.04647","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":"sha256:3df9b601532c3f9b812bb1f79864e7c12b69588fa2c69f11f5d8300e4d71af7f","target":"record","created_at":"2026-05-18T00:39:31Z","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":"e7d344efce0f75ff612754cfb529f69b2cab1b44635ee313167231a1628eb78f","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-14T19:27:37Z","title_canon_sha256":"b53a63d9a200c0a4db5090a26fc361e500549f5eed02a7d1c5b05c155890a235"},"schema_version":"1.0","source":{"id":"1706.04647","kind":"arxiv","version":1}},"canonical_sha256":"ab2050ce712106fc1ede3f6487d2255ddd0f11648e6173350f1ac12e5563adfc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ab2050ce712106fc1ede3f6487d2255ddd0f11648e6173350f1ac12e5563adfc","first_computed_at":"2026-05-18T00:39:31.536062Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:39:31.536062Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oCE9ov/B0I5wTv0Nj3lNhyxy/a3O5fPp7iizQjNtV28U7NvCWUL3tIQnY8RTO70SQnvwicFXwpKga3wUkQIxDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:39:31.536648Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.04647","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3df9b601532c3f9b812bb1f79864e7c12b69588fa2c69f11f5d8300e4d71af7f","sha256:9ae7057414a7ff24ba8f209dae346e13da0be58ef7b749537321043019ff8513"],"state_sha256":"6f6d34c3b461511ba8930cc872a9cd8f6961b77cbb232e7a7a2a6d127aa87cdf"}