{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:A5EPRFCXLIGMCUNWOTUKDOEL3F","short_pith_number":"pith:A5EPRFCX","canonical_record":{"source":{"id":"1404.4446","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-17T08:27:42Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"ee4709fe160aa24b5d92cd2ba122e1a5cc3bb53db63de3dd7be3e0a6ba20bb0c","abstract_canon_sha256":"868e192c4474529010b1b6c609f415336b1df8a28629d00391316743d4f41ffa"},"schema_version":"1.0"},"canonical_sha256":"0748f894575a0cc151b674e8a1b88bd97a9eba14f62f73503d9a2462db04b808","source":{"kind":"arxiv","id":"1404.4446","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.4446","created_at":"2026-05-18T01:43:29Z"},{"alias_kind":"arxiv_version","alias_value":"1404.4446v1","created_at":"2026-05-18T01:43:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.4446","created_at":"2026-05-18T01:43:29Z"},{"alias_kind":"pith_short_12","alias_value":"A5EPRFCXLIGM","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"A5EPRFCXLIGMCUNW","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"A5EPRFCX","created_at":"2026-05-18T12:28:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:A5EPRFCXLIGMCUNWOTUKDOEL3F","target":"record","payload":{"canonical_record":{"source":{"id":"1404.4446","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-17T08:27:42Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"ee4709fe160aa24b5d92cd2ba122e1a5cc3bb53db63de3dd7be3e0a6ba20bb0c","abstract_canon_sha256":"868e192c4474529010b1b6c609f415336b1df8a28629d00391316743d4f41ffa"},"schema_version":"1.0"},"canonical_sha256":"0748f894575a0cc151b674e8a1b88bd97a9eba14f62f73503d9a2462db04b808","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:43:29.060123Z","signature_b64":"p8M1mvenkEkHorWTBxdWHQGGdIiGcodRmTap7Bl3HlDwMwVN3TLpL0eAydO4o8dkLymRB36YQnh9uKpQS2oRDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0748f894575a0cc151b674e8a1b88bd97a9eba14f62f73503d9a2462db04b808","last_reissued_at":"2026-05-18T01:43:29.059426Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:43:29.059426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.4446","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:43:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LtaDkb0MoONmCDl8hZ/Spnb/h5YBSieX0P49/X/+RRQTZP7NqYPoVeJnYbscVcBZmuRvqChL2ks/GwdfiysYCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:50:37.585278Z"},"content_sha256":"7d7a86d99a765c6fb659e0171b813d02250d2532d7931264ad2b46ed97b2394e","schema_version":"1.0","event_id":"sha256:7d7a86d99a765c6fb659e0171b813d02250d2532d7931264ad2b46ed97b2394e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:A5EPRFCXLIGMCUNWOTUKDOEL3F","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraints on the winds of hot subdwarf stars from X-ray observations of two sdB binaries with compact companions: CD -30 11223 and PG 1232-136","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"A.Tiengo, F. Gastaldello, J. Wilms, N. La Palombara, P. Esposito, S. Geier, S. Mereghetti, U.Heber","submitted_at":"2014-04-17T08:27:42Z","abstract_excerpt":"Little observational data are available on the weak stellar winds of hot subdwarf stars of B spectral type (sdB). Close binary systems composed of an sdB star and a compact object (white dwarf, neutron star or black hole) could be detected as accretion-powered X-ray sources. The study of their X-ray emission can probe the properties of line-driven winds of sdB stars that can not be derived directly from spectroscopy because of the low luminosity of these stars. Here we report on the first sensitive X-ray observations of two sdB binaries with compact companions. CD -30 11223 is the sdB binary w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.4446","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:43:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JiFI7fFqLTFYD+FhmWPYrb/pHaJ88WVWkNO/b+hT1G3Xp0f1obNgprHO+h/2kx2TP2t6STdY/AeBEBAJXIjfDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:50:37.585679Z"},"content_sha256":"96416c62731073a0fe0ece04b7340c45d61d6edb55be0423aa8a4c625012bbd5","schema_version":"1.0","event_id":"sha256:96416c62731073a0fe0ece04b7340c45d61d6edb55be0423aa8a4c625012bbd5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A5EPRFCXLIGMCUNWOTUKDOEL3F/bundle.json","state_url":"https://pith.science/pith/A5EPRFCXLIGMCUNWOTUKDOEL3F/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A5EPRFCXLIGMCUNWOTUKDOEL3F/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T08:50:37Z","links":{"resolver":"https://pith.science/pith/A5EPRFCXLIGMCUNWOTUKDOEL3F","bundle":"https://pith.science/pith/A5EPRFCXLIGMCUNWOTUKDOEL3F/bundle.json","state":"https://pith.science/pith/A5EPRFCXLIGMCUNWOTUKDOEL3F/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A5EPRFCXLIGMCUNWOTUKDOEL3F/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:A5EPRFCXLIGMCUNWOTUKDOEL3F","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":"868e192c4474529010b1b6c609f415336b1df8a28629d00391316743d4f41ffa","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-17T08:27:42Z","title_canon_sha256":"ee4709fe160aa24b5d92cd2ba122e1a5cc3bb53db63de3dd7be3e0a6ba20bb0c"},"schema_version":"1.0","source":{"id":"1404.4446","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.4446","created_at":"2026-05-18T01:43:29Z"},{"alias_kind":"arxiv_version","alias_value":"1404.4446v1","created_at":"2026-05-18T01:43:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.4446","created_at":"2026-05-18T01:43:29Z"},{"alias_kind":"pith_short_12","alias_value":"A5EPRFCXLIGM","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"A5EPRFCXLIGMCUNW","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"A5EPRFCX","created_at":"2026-05-18T12:28:19Z"}],"graph_snapshots":[{"event_id":"sha256:96416c62731073a0fe0ece04b7340c45d61d6edb55be0423aa8a4c625012bbd5","target":"graph","created_at":"2026-05-18T01:43:29Z","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":"Little observational data are available on the weak stellar winds of hot subdwarf stars of B spectral type (sdB). Close binary systems composed of an sdB star and a compact object (white dwarf, neutron star or black hole) could be detected as accretion-powered X-ray sources. The study of their X-ray emission can probe the properties of line-driven winds of sdB stars that can not be derived directly from spectroscopy because of the low luminosity of these stars. Here we report on the first sensitive X-ray observations of two sdB binaries with compact companions. CD -30 11223 is the sdB binary w","authors_text":"A.Tiengo, F. Gastaldello, J. Wilms, N. La Palombara, P. Esposito, S. Geier, S. Mereghetti, U.Heber","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-17T08:27:42Z","title":"Constraints on the winds of hot subdwarf stars from X-ray observations of two sdB binaries with compact companions: CD -30 11223 and PG 1232-136"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.4446","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":"sha256:7d7a86d99a765c6fb659e0171b813d02250d2532d7931264ad2b46ed97b2394e","target":"record","created_at":"2026-05-18T01:43:29Z","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":"868e192c4474529010b1b6c609f415336b1df8a28629d00391316743d4f41ffa","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-17T08:27:42Z","title_canon_sha256":"ee4709fe160aa24b5d92cd2ba122e1a5cc3bb53db63de3dd7be3e0a6ba20bb0c"},"schema_version":"1.0","source":{"id":"1404.4446","kind":"arxiv","version":1}},"canonical_sha256":"0748f894575a0cc151b674e8a1b88bd97a9eba14f62f73503d9a2462db04b808","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0748f894575a0cc151b674e8a1b88bd97a9eba14f62f73503d9a2462db04b808","first_computed_at":"2026-05-18T01:43:29.059426Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:29.059426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"p8M1mvenkEkHorWTBxdWHQGGdIiGcodRmTap7Bl3HlDwMwVN3TLpL0eAydO4o8dkLymRB36YQnh9uKpQS2oRDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:29.060123Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.4446","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7d7a86d99a765c6fb659e0171b813d02250d2532d7931264ad2b46ed97b2394e","sha256:96416c62731073a0fe0ece04b7340c45d61d6edb55be0423aa8a4c625012bbd5"],"state_sha256":"75f3cc7689dda0f65d0d8590ff21f3880578c5ee2711a9f24f112605d901b1b3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K3In7xBCn61/DDhcAQPKkUPE0g35/gpzp7SPMbIQYTtROtHmah1HvjmPZf9uaHbuo52SBJ7cMvIUZ9IJ3OVaDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T08:50:37.588300Z","bundle_sha256":"9e57a96b2861bc706b647f4e55b74072ca5334f9a0b439edb768972157e7276b"}}