{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:7DK2YBEYKQ2ZWQG7NEXS5X7P2R","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":"9db4ddd01f5354aacf6cd48f917feb4e43bcd7b81074e277f37c81086722d5e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-05-21T18:00:32Z","title_canon_sha256":"0202fcb471bb293e35f524162d21d4a882cafe71e4efddc4ca2792ff7a7204bc"},"schema_version":"1.0","source":{"id":"1905.08817","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.08817","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"arxiv_version","alias_value":"1905.08817v1","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.08817","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"pith_short_12","alias_value":"7DK2YBEYKQ2Z","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"7DK2YBEYKQ2ZWQG7","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"7DK2YBEY","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:4dc350e74ca8ac986c7a8a14e225d1be90ff45240a61fbfe9050ea323275b7fc","target":"graph","created_at":"2026-05-17T23:41:08Z","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":"We report on Nuclear Spectroscopic Telescope Array (NuSTAR), Neil Gehrels Swift Observatory (Swift) X-ray Telescope (XRT) and Swift Burst Alert Telescope (BAT) observations of IGR J16493-4348, a wind-fed Supergiant X-ray Binary (SGXB) showing significant superorbital variability. From a discrete Fourier transform of the BAT light curve, we refine its superorbital period to be 20.058 $\\pm$ 0.007 days. The BAT dynamic power spectrum and a fractional root mean square analysis both show strong variations in the amplitude of the superorbital modulation, but no observed changes in the period were fo","authors_text":"Aaron B. Pearlman, Felix Fuerst, Gregory Huxtable, Hans A. Krimm, Joel B. Coley, Katja Pottschmidt, Robin H. D. Corbet","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-05-21T18:00:32Z","title":"A Study of the 20 Day Superorbital Modulation in the High-Mass X-ray Binary IGR J16493-4348"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.08817","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:ecf16c50ab368a032867edd11133ac97a3ef944e81fbc2e32022fa00a971dead","target":"record","created_at":"2026-05-17T23:41:08Z","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":"9db4ddd01f5354aacf6cd48f917feb4e43bcd7b81074e277f37c81086722d5e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-05-21T18:00:32Z","title_canon_sha256":"0202fcb471bb293e35f524162d21d4a882cafe71e4efddc4ca2792ff7a7204bc"},"schema_version":"1.0","source":{"id":"1905.08817","kind":"arxiv","version":1}},"canonical_sha256":"f8d5ac049854359b40df692f2edfefd4766fcf2f1fa397bbca612e6872546071","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f8d5ac049854359b40df692f2edfefd4766fcf2f1fa397bbca612e6872546071","first_computed_at":"2026-05-17T23:41:08.427081Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:08.427081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZqaKBk9huBKiK76V5ha+z677Jr4eYoK0AAjUilVlQj2NS8YxDLZDxyWXtbVtCxPUEIccfOZyOy3RpDk7G+8fBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:08.427722Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.08817","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ecf16c50ab368a032867edd11133ac97a3ef944e81fbc2e32022fa00a971dead","sha256:4dc350e74ca8ac986c7a8a14e225d1be90ff45240a61fbfe9050ea323275b7fc"],"state_sha256":"38be4ce2df8cbbc5f7ee5e72d00152986587da65ebada79ccefeb20a51248181"}