{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:2R56L2YO35TLMP4A3UGLLF32WQ","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":"b6377782485844622214046bbc1d619757a8fac0ebf676136a8d95139ad5a291","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-05T11:27:19Z","title_canon_sha256":"01164402754370bcc8e5a2ad034e3263cca8633273889e6fc8aa0a2c375cd645"},"schema_version":"1.0","source":{"id":"0911.1014","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1014","created_at":"2026-05-18T02:10:59Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1014v1","created_at":"2026-05-18T02:10:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1014","created_at":"2026-05-18T02:10:59Z"},{"alias_kind":"pith_short_12","alias_value":"2R56L2YO35TL","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"2R56L2YO35TLMP4A","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"2R56L2YO","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:a042f91b6b89d24c6d658e378cd265bbeccc3ab85e1de273fab5d86b1adc30f6","target":"graph","created_at":"2026-05-18T02:10:59Z","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 our optical observations of {\\em Swift} GRB 070518 afterglow obtained at the 0.8-m Tsinghua University-National Astronomical Observatory of China telescope (TNT) at Xinglong Observatory. Our follow-up observations were performed from 512 sec after the burst trigger. With the upper limit of redshift $\\sim$0.7, GRB 070518 is found to be an optically dim burst. The spectra indices $\\beta_{ox}$ of optical to X-ray are slightly larger than 0.5, which implies the burst might be a dark burst. The extinction $A_{V}$ of the host galaxy is 3.2 mag inferred from the X-ray hydrogen column densi","authors_text":"J.S. Deng, J. Wang, J.Y. Hu, J.Y. Wei, K.Y. Huang, L.P. Xin, W.K. Zheng, Y.L. Qiu, Y. Urata","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-05T11:27:19Z","title":"GRB 070518: A Gamma-ray Burst with Optically Dim Luminosity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1014","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":"sha256:06c78769b90164ee109c59265f9e8a1552c830805ac84dd74bcc061114126b8b","target":"record","created_at":"2026-05-18T02:10:59Z","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":"b6377782485844622214046bbc1d619757a8fac0ebf676136a8d95139ad5a291","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-05T11:27:19Z","title_canon_sha256":"01164402754370bcc8e5a2ad034e3263cca8633273889e6fc8aa0a2c375cd645"},"schema_version":"1.0","source":{"id":"0911.1014","kind":"arxiv","version":1}},"canonical_sha256":"d47be5eb0edf66b63f80dd0cb5977ab428c097aa3c9eef9dbd8be60b2039b706","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d47be5eb0edf66b63f80dd0cb5977ab428c097aa3c9eef9dbd8be60b2039b706","first_computed_at":"2026-05-18T02:10:59.310675Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:59.310675Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zkHTV4MGhEgHp0lUvbGfHlwL5tNv3CW//0PeWaB4ed4UgTbdoBBS/5pu6er6dJXAnEbn+0sxGYRgWkpQLl7WDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:59.311353Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.1014","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:06c78769b90164ee109c59265f9e8a1552c830805ac84dd74bcc061114126b8b","sha256:a042f91b6b89d24c6d658e378cd265bbeccc3ab85e1de273fab5d86b1adc30f6"],"state_sha256":"25bdb80a152854cd036213fdd7d700e3a6e43f036c41c2d1ddd87709fdbf87f0"}