{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:GWXJ2GIRHM3RYY53Z7DSWGPAXK","short_pith_number":"pith:GWXJ2GIR","schema_version":"1.0","canonical_sha256":"35ae9d19113b371c63bbcfc72b19e0baadf7058e58a84363193ce9cff3beaab9","source":{"kind":"arxiv","id":"1305.1153","version":2},"attestation_state":"computed","paper":{"title":"Dust-to-metal ratios in damped Lyman-alpha absorbers: Fresh clues to the origins of dust and optical extinction towards gamma-ray bursts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. De Cia, C. Ledoux, P.M. Vreeswijk, P. Schady, S. Savaglio","submitted_at":"2013-05-06T11:53:46Z","abstract_excerpt":"Motivated by the anomalous dust-to-metal ratios derived in the literature for gamma-ray burst (GRB) damped Lyman-alpha absorbers (DLAs), we measure these ratios using the dust-depletion pattern observed in UV/optical afterglow spectra associated with the ISM at the GRB host-galaxy redshifts. Our sample consists of 20 GRB absorbers and a comparison sample of 72 QSO-DLAs with redshift 1.2 < z < 4.0 and down to Z = 0.002 Z_Sol metallicities. The dust-to-metal ratio in QSO- and GRB-DLAs increases both with metallicity and metal column density, spanning ~10--110% of the Galactic value and pointing "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1305.1153","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-06T11:53:46Z","cross_cats_sorted":[],"title_canon_sha256":"5891dd1c70fd5f7cdbaa01903fae6904f567a7f50e4d509bd1987dd3ebdea8f8","abstract_canon_sha256":"67b2b87b28260b707a1980613a05888707e7f3e76b136c3513e3cbcfe4b514fb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:11.865306Z","signature_b64":"8xQ0SMYNcPyIOP2EHwzPlZ7a+iDTSHhedQRvU3xXvNVqSrg9ae2UudwCJx4mXpDtz2mSIJ7OK7rmLPzqIAQLDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"35ae9d19113b371c63bbcfc72b19e0baadf7058e58a84363193ce9cff3beaab9","last_reissued_at":"2026-05-18T01:50:11.864546Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:11.864546Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Dust-to-metal ratios in damped Lyman-alpha absorbers: Fresh clues to the origins of dust and optical extinction towards gamma-ray bursts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. De Cia, C. Ledoux, P.M. Vreeswijk, P. Schady, S. Savaglio","submitted_at":"2013-05-06T11:53:46Z","abstract_excerpt":"Motivated by the anomalous dust-to-metal ratios derived in the literature for gamma-ray burst (GRB) damped Lyman-alpha absorbers (DLAs), we measure these ratios using the dust-depletion pattern observed in UV/optical afterglow spectra associated with the ISM at the GRB host-galaxy redshifts. Our sample consists of 20 GRB absorbers and a comparison sample of 72 QSO-DLAs with redshift 1.2 < z < 4.0 and down to Z = 0.002 Z_Sol metallicities. The dust-to-metal ratio in QSO- and GRB-DLAs increases both with metallicity and metal column density, spanning ~10--110% of the Galactic value and pointing "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.1153","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1305.1153","created_at":"2026-05-18T01:50:11.864672+00:00"},{"alias_kind":"arxiv_version","alias_value":"1305.1153v2","created_at":"2026-05-18T01:50:11.864672+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.1153","created_at":"2026-05-18T01:50:11.864672+00:00"},{"alias_kind":"pith_short_12","alias_value":"GWXJ2GIRHM3R","created_at":"2026-05-18T12:27:46.883200+00:00"},{"alias_kind":"pith_short_16","alias_value":"GWXJ2GIRHM3RYY53","created_at":"2026-05-18T12:27:46.883200+00:00"},{"alias_kind":"pith_short_8","alias_value":"GWXJ2GIR","created_at":"2026-05-18T12:27:46.883200+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2506.13851","citing_title":"Interstellar dust production, destruction and effects of dust depletion in galaxies","ref_index":246,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/GWXJ2GIRHM3RYY53Z7DSWGPAXK","json":"https://pith.science/pith/GWXJ2GIRHM3RYY53Z7DSWGPAXK.json","graph_json":"https://pith.science/api/pith-number/GWXJ2GIRHM3RYY53Z7DSWGPAXK/graph.json","events_json":"https://pith.science/api/pith-number/GWXJ2GIRHM3RYY53Z7DSWGPAXK/events.json","paper":"https://pith.science/paper/GWXJ2GIR"},"agent_actions":{"view_html":"https://pith.science/pith/GWXJ2GIRHM3RYY53Z7DSWGPAXK","download_json":"https://pith.science/pith/GWXJ2GIRHM3RYY53Z7DSWGPAXK.json","view_paper":"https://pith.science/paper/GWXJ2GIR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1305.1153&json=true","fetch_graph":"https://pith.science/api/pith-number/GWXJ2GIRHM3RYY53Z7DSWGPAXK/graph.json","fetch_events":"https://pith.science/api/pith-number/GWXJ2GIRHM3RYY53Z7DSWGPAXK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GWXJ2GIRHM3RYY53Z7DSWGPAXK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GWXJ2GIRHM3RYY53Z7DSWGPAXK/action/storage_attestation","attest_author":"https://pith.science/pith/GWXJ2GIRHM3RYY53Z7DSWGPAXK/action/author_attestation","sign_citation":"https://pith.science/pith/GWXJ2GIRHM3RYY53Z7DSWGPAXK/action/citation_signature","submit_replication":"https://pith.science/pith/GWXJ2GIRHM3RYY53Z7DSWGPAXK/action/replication_record"}},"created_at":"2026-05-18T01:50:11.864672+00:00","updated_at":"2026-05-18T01:50:11.864672+00:00"}