{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:LMT2GXZNZ3XRX4EMVJZSP3TD5E","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":"db9d35e2828c2d310962cbead493efdbd331112c3cb4d4ca82c5488a76b0ed90","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-01-04T15:03:31Z","title_canon_sha256":"df301c04457bcf07eea7830bff642996b93f83452d4bf14fe8d4ba3c5ce09c01"},"schema_version":"1.0","source":{"id":"astro-ph/0001034","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0001034","created_at":"2026-05-18T01:09:11Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0001034v1","created_at":"2026-05-18T01:09:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0001034","created_at":"2026-05-18T01:09:11Z"},{"alias_kind":"pith_short_12","alias_value":"LMT2GXZNZ3XR","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"LMT2GXZNZ3XRX4EM","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"LMT2GXZN","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:f77a0587594a6af8c546b2a51928225ed0ab80df67c3be5bfb59f7a73adc9028","target":"graph","created_at":"2026-05-18T01:09:11Z","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 present the first X-ray spectrum obtained by the Low Energy Transmission Grating Spectrometer (LETGS) aboard the Chandra X-ray Observatory. The spectrum is of Capella and covers a wavelength range of 5-175 A (2.5-0.07 keV). The measured wavelength resolution, which is in good agreement with ground calibration, is $\\Delta \\lambda \\simeq$ 0.06 A (FWHM). Although in-flight calibration of the LETGS is in progress, the high spectral resolution and unique wavelength coverage of the LETGS are well demonstrated by the results from Capella, a coronal source rich in spectral emission lines. While the","authors_text":"A. C. Brinkman, A. J. J. Raassen, B. J. Wargelin (Harvard-CFA), C. J. T. Gunsing, D. Pease, F. Paerels, G. Hartner, H. Br\\\"auninger, J. H. M. M. Schmitt (Uni Hamburg), J. J. Drake, J. J. van Rooijen (SRON), J. S. Kaastra, J.-U. Ness, M. Juda, O. Johnson, P. Predehl (MPE), P. Ratzlaff, R. L. J. van der Meer, R. Mewe, S. S. Murray, V. Burwitz, V. Kashyap, W. Burkert","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-01-04T15:03:31Z","title":"First Light Measurements of Capella with the Low Energy Transmission Grating Spectrometer aboard the Chandra X-ray Observatory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0001034","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":"sha256:764cbe3f07c8db611b01726d6d078eae4bfec9baaab71ace92de6970e23dd396","target":"record","created_at":"2026-05-18T01:09:11Z","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":"db9d35e2828c2d310962cbead493efdbd331112c3cb4d4ca82c5488a76b0ed90","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-01-04T15:03:31Z","title_canon_sha256":"df301c04457bcf07eea7830bff642996b93f83452d4bf14fe8d4ba3c5ce09c01"},"schema_version":"1.0","source":{"id":"astro-ph/0001034","kind":"arxiv","version":1}},"canonical_sha256":"5b27a35f2dceef1bf08caa7327ee63e93af2f2ef72239f2594eff6848c732db8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5b27a35f2dceef1bf08caa7327ee63e93af2f2ef72239f2594eff6848c732db8","first_computed_at":"2026-05-18T01:09:11.078332Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:11.078332Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RMYxBOTZNACYcLFb7oivihiGC743A/Ad+LXCsbK0cPkVjXdMiHfdZc0oNPOBv7uLu/pu13mr+pxvxKSzj/wQAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:11.078856Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0001034","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:764cbe3f07c8db611b01726d6d078eae4bfec9baaab71ace92de6970e23dd396","sha256:f77a0587594a6af8c546b2a51928225ed0ab80df67c3be5bfb59f7a73adc9028"],"state_sha256":"e7f669eedd472a2d3c644943254068cfe22af1ae2f2163de469a43b88e10383b"}