{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:FLKRKNJC7SNNWS3Y4GQ76ZZIWR","short_pith_number":"pith:FLKRKNJC","schema_version":"1.0","canonical_sha256":"2ad5153522fc9adb4b78e1a1ff6728b46595a0e509256d58fb4dfe7b3d0655b8","source":{"kind":"arxiv","id":"1203.2885","version":1},"attestation_state":"computed","paper":{"title":"Two Extrasolar Asteroids with Low Volatile-Element Mass Fractions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"((1) UCLA, (2) University of Kiel), B. Klein (1), B. Zuckerman (1), D. Koester (2), M. Jura (1), S. Xu (1)","submitted_at":"2012-03-13T18:11:27Z","abstract_excerpt":"Using ultraviolet spectra obtained with the Cosmic Origins Spectrograph on the Hubble Space Telescope, we extend our previous ground-based optical determinations of the composition of the extrasolar asteroids accreted onto two white dwarfs, GD 40 and G241-6. Combining optical and ultraviolet spectra of these stars with He-dominated atmospheres, 13 and 12 polluting elements are confidently detected in GD 40 and G241-6, respectively. For the material accreted onto GD 40, the volatile elements C and S are deficient by more than a factor of 10 and N by at least a factor of 5 compared to their mass"},"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":"1203.2885","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-03-13T18:11:27Z","cross_cats_sorted":[],"title_canon_sha256":"6bb452c4d4dcc0d6c092f5eea9d8690bb5e19ede9d2bcb589d71140e0419a87b","abstract_canon_sha256":"bcd9a257264332c61ba8284eccb89cbea9b0051703ab21dd298d78859c0cecde"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:09.261570Z","signature_b64":"2rKoiGD+WAZWhd9D8PIk2bwCCAO063slmWCM19bFnpxKM0jobn/bSbvOTV2cTnxWe78QwJtYN7XRxD8nKVU/Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ad5153522fc9adb4b78e1a1ff6728b46595a0e509256d58fb4dfe7b3d0655b8","last_reissued_at":"2026-05-18T01:58:09.261013Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:09.261013Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Two Extrasolar Asteroids with Low Volatile-Element Mass Fractions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"((1) UCLA, (2) University of Kiel), B. Klein (1), B. Zuckerman (1), D. Koester (2), M. Jura (1), S. Xu (1)","submitted_at":"2012-03-13T18:11:27Z","abstract_excerpt":"Using ultraviolet spectra obtained with the Cosmic Origins Spectrograph on the Hubble Space Telescope, we extend our previous ground-based optical determinations of the composition of the extrasolar asteroids accreted onto two white dwarfs, GD 40 and G241-6. Combining optical and ultraviolet spectra of these stars with He-dominated atmospheres, 13 and 12 polluting elements are confidently detected in GD 40 and G241-6, respectively. For the material accreted onto GD 40, the volatile elements C and S are deficient by more than a factor of 10 and N by at least a factor of 5 compared to their mass"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.2885","kind":"arxiv","version":1},"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":"1203.2885","created_at":"2026-05-18T01:58:09.261105+00:00"},{"alias_kind":"arxiv_version","alias_value":"1203.2885v1","created_at":"2026-05-18T01:58:09.261105+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.2885","created_at":"2026-05-18T01:58:09.261105+00:00"},{"alias_kind":"pith_short_12","alias_value":"FLKRKNJC7SNN","created_at":"2026-05-18T12:27:06.952714+00:00"},{"alias_kind":"pith_short_16","alias_value":"FLKRKNJC7SNNWS3Y","created_at":"2026-05-18T12:27:06.952714+00:00"},{"alias_kind":"pith_short_8","alias_value":"FLKRKNJC","created_at":"2026-05-18T12:27:06.952714+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/FLKRKNJC7SNNWS3Y4GQ76ZZIWR","json":"https://pith.science/pith/FLKRKNJC7SNNWS3Y4GQ76ZZIWR.json","graph_json":"https://pith.science/api/pith-number/FLKRKNJC7SNNWS3Y4GQ76ZZIWR/graph.json","events_json":"https://pith.science/api/pith-number/FLKRKNJC7SNNWS3Y4GQ76ZZIWR/events.json","paper":"https://pith.science/paper/FLKRKNJC"},"agent_actions":{"view_html":"https://pith.science/pith/FLKRKNJC7SNNWS3Y4GQ76ZZIWR","download_json":"https://pith.science/pith/FLKRKNJC7SNNWS3Y4GQ76ZZIWR.json","view_paper":"https://pith.science/paper/FLKRKNJC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1203.2885&json=true","fetch_graph":"https://pith.science/api/pith-number/FLKRKNJC7SNNWS3Y4GQ76ZZIWR/graph.json","fetch_events":"https://pith.science/api/pith-number/FLKRKNJC7SNNWS3Y4GQ76ZZIWR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FLKRKNJC7SNNWS3Y4GQ76ZZIWR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FLKRKNJC7SNNWS3Y4GQ76ZZIWR/action/storage_attestation","attest_author":"https://pith.science/pith/FLKRKNJC7SNNWS3Y4GQ76ZZIWR/action/author_attestation","sign_citation":"https://pith.science/pith/FLKRKNJC7SNNWS3Y4GQ76ZZIWR/action/citation_signature","submit_replication":"https://pith.science/pith/FLKRKNJC7SNNWS3Y4GQ76ZZIWR/action/replication_record"}},"created_at":"2026-05-18T01:58:09.261105+00:00","updated_at":"2026-05-18T01:58:09.261105+00:00"}