标题： O IV和S IV谱线的观测报告 显示英文标题

标题： Report on the O IV and S IV lines observed by IRIS

摘要： O IV 1397 到 1407 A 之间的组合线由界面区域成像光谱仪 (IRIS) 观测到，提供了有用的密度诊断信息。本文档提供了有关这些线的两个问题的数据：(1) S IV 对 O IV 1404.8 线的贡献；以及 (2) O IV 1399.8/1401.2 比率的敏感范围。 显示英文摘要

摘要： The O IV intercombination lines observed by the Interface Region Imaging Spectrograph (IRIS) between 1397 and 1407 A provide useful density diagnostics. This document presents data that address two issues related to these lines: (1) the contribution of S IV to the O IV 1404.8 line; and (2) the range of sensitivity of the O IV 1399.8/1401.2 ratio.