{"paper":{"title":"First Light Measurements of Capella with the Low Energy Transmission Grating Spectrometer aboard the Chandra X-ray Observatory","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","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","submitted_at":"2000-01-04T15:03:31Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0001034","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"}