{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:46OW2OBUNE65MGOEHJCV46AGHU","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":"6b6187044ab00937d6092d6f74cb33e8f0068eea9260211d16fa8483212e6763","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-11-17T22:02:51Z","title_canon_sha256":"571213faf076efcf8dc9793ef54f4a630b59b4ee66958c7decd85373dd0b5ee9"},"schema_version":"1.0","source":{"id":"1711.06743","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.06743","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"arxiv_version","alias_value":"1711.06743v1","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.06743","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"pith_short_12","alias_value":"46OW2OBUNE65","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_16","alias_value":"46OW2OBUNE65MGOE","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_8","alias_value":"46OW2OBU","created_at":"2026-05-18T12:30:58Z"}],"graph_snapshots":[{"event_id":"sha256:fc7a2584dd06792fc73328327fbfe0b7c7aae1b680410f4b4a8dfabf9b5162e4","target":"graph","created_at":"2026-05-18T00:27:41Z","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":"Bright and eclipsing, the high-mass X-ray binary Vela X-1 offers a unique opportunity to study accretion onto a neutron star from clumpy winds of O/B stars and to disentangle the complex accretion geometry of these systems. In Chandra-HETGS spectroscopy at orbital phase ~0.25, when our line of sight towards the source does not pass through the large-scale accretion structure such as the accretion wake, we observe changes in overall spectral shape on timescales of a few kiloseconds. This spectral variability is, at least in part, caused by changes in overall absorption and we show that such str","authors_text":"A.A.C. Sander, D.P. Huenemoerder, F. F\\\"urst, I. El Mellah, J. Neilsen, J. Wilms, K. Pottschmidt, M.A. Nowak, M. K\\\"uhnel, M. Leutenegger, N. Hell, N.S. Schulz, P. Kretschmar, S. Mart\\'inez-N\\'u\\~nez, S. Niu, V. Grinberg","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-11-17T22:02:51Z","title":"The clumpy absorber in the high-mass X-ray binary Vela X-1"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.06743","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:eb1490b76dd89adb175fc37bcd4455d0de78d1ada2d3b2b3078dac00e335579d","target":"record","created_at":"2026-05-18T00:27:41Z","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":"6b6187044ab00937d6092d6f74cb33e8f0068eea9260211d16fa8483212e6763","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-11-17T22:02:51Z","title_canon_sha256":"571213faf076efcf8dc9793ef54f4a630b59b4ee66958c7decd85373dd0b5ee9"},"schema_version":"1.0","source":{"id":"1711.06743","kind":"arxiv","version":1}},"canonical_sha256":"e79d6d3834693dd619c43a455e78063d30757d2307c00b8a2156b70363299dda","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e79d6d3834693dd619c43a455e78063d30757d2307c00b8a2156b70363299dda","first_computed_at":"2026-05-18T00:27:41.626611Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:41.626611Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vUuzwIqHMqBDfI4+Hi3JgB/w/uvQjTeI30Z4fFFKXmrGliG5AvfNPjBNy3jAgD0O3/0A7LTWW9dx0aRrq3aUDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:41.627299Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.06743","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb1490b76dd89adb175fc37bcd4455d0de78d1ada2d3b2b3078dac00e335579d","sha256:fc7a2584dd06792fc73328327fbfe0b7c7aae1b680410f4b4a8dfabf9b5162e4"],"state_sha256":"c863e995b9b6d462318e275bd5166efdb42429bb304994dce06543a80fff68f1"}