{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:SNOAIZH3M5FHG5BQMMAAYRX4XI","short_pith_number":"pith:SNOAIZH3","schema_version":"1.0","canonical_sha256":"935c0464fb674a73743063000c46fcba300d34e3e3ed47895043ce1bd45a050c","source":{"kind":"arxiv","id":"1812.00007","version":1},"attestation_state":"computed","paper":{"title":"Two circumstellar nebulae discovered with the Wide-field Infrared Survey Explorer and their massive central stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A.Y. Kniazev, E.K. Grebel, N. Castro, V.V. Gvaramadze","submitted_at":"2018-11-30T19:00:00Z","abstract_excerpt":"We report the discovery of two mid-infrared nebulae in the northern hemisphere with the Wide-field Infrared Survey Explorer and the results of optical spectroscopy of their central stars, BD+60 2668 (composed of two components, separated from each other by \\approx 3 arcsec) and ALS 19653, with the Calar Alto 3.5-m telescope and the Southern African Large Telescope (SALT), respectively. We classify the components of BD+60 2668 as stars of spectral types B0.5 II and B1.5 III. ALS 19653 is indicated in the SIMBAD data base as a planetary nebula, while our observations show that it is a massive B0"},"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":"1812.00007","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-11-30T19:00:00Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"3275019e22726b40c755159898c61f4b5959affa16cdec5dfa478b5c95afb9ad","abstract_canon_sha256":"2a8a4126677c59bea673a89656409488dd618bc321af53943f2f9984382478d8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:18.976639Z","signature_b64":"dDmolqV/RLDfZT96Df9HlnPAG8KcG9SZ8ukWXeviOv8lSFYPd1+Q9u4ut0EK2ZxxVEN8xbJUlMMlfrNH4ogkCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"935c0464fb674a73743063000c46fcba300d34e3e3ed47895043ce1bd45a050c","last_reissued_at":"2026-05-17T23:55:18.976158Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:18.976158Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Two circumstellar nebulae discovered with the Wide-field Infrared Survey Explorer and their massive central stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A.Y. Kniazev, E.K. Grebel, N. Castro, V.V. Gvaramadze","submitted_at":"2018-11-30T19:00:00Z","abstract_excerpt":"We report the discovery of two mid-infrared nebulae in the northern hemisphere with the Wide-field Infrared Survey Explorer and the results of optical spectroscopy of their central stars, BD+60 2668 (composed of two components, separated from each other by \\approx 3 arcsec) and ALS 19653, with the Calar Alto 3.5-m telescope and the Southern African Large Telescope (SALT), respectively. We classify the components of BD+60 2668 as stars of spectral types B0.5 II and B1.5 III. ALS 19653 is indicated in the SIMBAD data base as a planetary nebula, while our observations show that it is a massive B0"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.00007","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":"1812.00007","created_at":"2026-05-17T23:55:18.976245+00:00"},{"alias_kind":"arxiv_version","alias_value":"1812.00007v1","created_at":"2026-05-17T23:55:18.976245+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.00007","created_at":"2026-05-17T23:55:18.976245+00:00"},{"alias_kind":"pith_short_12","alias_value":"SNOAIZH3M5FH","created_at":"2026-05-18T12:32:53.628368+00:00"},{"alias_kind":"pith_short_16","alias_value":"SNOAIZH3M5FHG5BQ","created_at":"2026-05-18T12:32:53.628368+00:00"},{"alias_kind":"pith_short_8","alias_value":"SNOAIZH3","created_at":"2026-05-18T12:32:53.628368+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/SNOAIZH3M5FHG5BQMMAAYRX4XI","json":"https://pith.science/pith/SNOAIZH3M5FHG5BQMMAAYRX4XI.json","graph_json":"https://pith.science/api/pith-number/SNOAIZH3M5FHG5BQMMAAYRX4XI/graph.json","events_json":"https://pith.science/api/pith-number/SNOAIZH3M5FHG5BQMMAAYRX4XI/events.json","paper":"https://pith.science/paper/SNOAIZH3"},"agent_actions":{"view_html":"https://pith.science/pith/SNOAIZH3M5FHG5BQMMAAYRX4XI","download_json":"https://pith.science/pith/SNOAIZH3M5FHG5BQMMAAYRX4XI.json","view_paper":"https://pith.science/paper/SNOAIZH3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1812.00007&json=true","fetch_graph":"https://pith.science/api/pith-number/SNOAIZH3M5FHG5BQMMAAYRX4XI/graph.json","fetch_events":"https://pith.science/api/pith-number/SNOAIZH3M5FHG5BQMMAAYRX4XI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SNOAIZH3M5FHG5BQMMAAYRX4XI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SNOAIZH3M5FHG5BQMMAAYRX4XI/action/storage_attestation","attest_author":"https://pith.science/pith/SNOAIZH3M5FHG5BQMMAAYRX4XI/action/author_attestation","sign_citation":"https://pith.science/pith/SNOAIZH3M5FHG5BQMMAAYRX4XI/action/citation_signature","submit_replication":"https://pith.science/pith/SNOAIZH3M5FHG5BQMMAAYRX4XI/action/replication_record"}},"created_at":"2026-05-17T23:55:18.976245+00:00","updated_at":"2026-05-17T23:55:18.976245+00:00"}