{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:BIRKP2V2TDAD7XWZOI5B5NLIDC","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":"25742918ab606b59c5681d3ad99ef0b1d94fba16ad704edd18f25aebab033ba7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-12T08:33:00Z","title_canon_sha256":"257099c0364c1e1901b6c93226b80d9c303025de409e3ecc34e0434ee2e5e5aa"},"schema_version":"1.0","source":{"id":"1503.03623","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.03623","created_at":"2026-05-18T01:09:49Z"},{"alias_kind":"arxiv_version","alias_value":"1503.03623v1","created_at":"2026-05-18T01:09:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.03623","created_at":"2026-05-18T01:09:49Z"},{"alias_kind":"pith_short_12","alias_value":"BIRKP2V2TDAD","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BIRKP2V2TDAD7XWZ","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BIRKP2V2","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:7a746f09147d49f1fa7e127afee7da3116523813a1f7cd01a4b23949ca121cd7","target":"graph","created_at":"2026-05-18T01:09:49Z","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":"In this work we use gamma-ray burst (GRB) afterglow spectra observed with the VLT/X-shooter spectrograph to measure rest-frame extinction in GRB lines-of-sight by modeling the broadband near-infrared (NIR) to X-ray afterglow spectral energy distributions (SEDs). Our sample consists of nine Swift GRBs, eight of them belonging to the long-duration and one to the short-duration class. Dust is modeled using the average extinction curves of the Milky Way and the two Magellanic Clouds. We derive the rest-frame extinction of the entire sample, which fall in the range $0 \\lesssim {\\it A}_{\\rm V} \\less","authors_text":"A. de Ugarte Postigo, A. Gomboc, A. Melandri, D. Kopa\\v{c}, D. Watson, F. Hammer, G. Tagliaferri, H. Flores, J. Hjorth, J. Japelj, J. P. U. Fynbo, J. Selsing, L. Kaper, N. R. Tanvir, P. Goldoni, P. Jakobsson, R. A. M. J. Wijers, R. S\\'anchez-Ram\\'irez, S. Covino, S. D. Vergani, S. Piranomonte, T. Kr\\\"uhler, V. D'Elia, Z. Cano","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-12T08:33:00Z","title":"Spectrophotometric analysis of GRB afterglow extinction curves with X-shooter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.03623","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:fef52136e055a2b5cc2e6a4007ef322ae8e32066af06ce556c4f6041df88a04f","target":"record","created_at":"2026-05-18T01:09:49Z","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":"25742918ab606b59c5681d3ad99ef0b1d94fba16ad704edd18f25aebab033ba7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-12T08:33:00Z","title_canon_sha256":"257099c0364c1e1901b6c93226b80d9c303025de409e3ecc34e0434ee2e5e5aa"},"schema_version":"1.0","source":{"id":"1503.03623","kind":"arxiv","version":1}},"canonical_sha256":"0a22a7eaba98c03fded9723a1eb56818a237101dc7d5a1d35eff33c5068d31a1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0a22a7eaba98c03fded9723a1eb56818a237101dc7d5a1d35eff33c5068d31a1","first_computed_at":"2026-05-18T01:09:49.079459Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:49.079459Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nvppru6aRisVxqDZYbh3IC40hor5wckc4A42Ri5LNKaVBhadpe3w+45LZesauyFXMGaxv6gzBUOU24DDlYGlAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:49.080171Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.03623","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fef52136e055a2b5cc2e6a4007ef322ae8e32066af06ce556c4f6041df88a04f","sha256:7a746f09147d49f1fa7e127afee7da3116523813a1f7cd01a4b23949ca121cd7"],"state_sha256":"d4490d6972381a0e06da89ab1b658779d0ee057bf46762f3d0a83dd89b98a3e1"}