AI 中文总结
该研究通过七种红化指标，结合1996年国际AGN Watch多波段监测数据，测得NGC 7469的红化程度E(B-V)=0.44±0.03，还发现其红化程度在七周内约增加10%，且数十年光学监测显示其消光存在年际适度变化。
AI 中文摘要
我们利用七种不同的红化指标，对1996年国际活动星系核监测（International AGN Watch）多波段监测活动期间，活动星系核NGC 7469的宽线区和连续谱的红化程度进行了估算。正如对NGC 5548的研究结果，这些指标表明速度积分的宽氢线比值接近B型复合（Case B）值。所有指标均指向1996年年中NGC 7469的红化程度E(B-V)=0.44±0.03。我们发现1996年监测活动的七周内，红化程度逐渐增加了约10%的证据。监测活动前后数十年的光学监测数据也与每年消光的适度变化相一致。
英文摘要
We estimate the reddening of the broad-line region and continuum of the active galactic nucleus NGC 7469 during the 1996 International AGN Watch multi-wavelength monitoring campaign using seven different reddening indicators. As was found for NGC 5548, these indicators support velocity-integrated broad hydrogen line ratios being close to Case B values. All the indicators point to substantial reddening of E(B-V) = 0.44 +/-0.03 for NGC 7469 during mid-1996. We find evidence for a gradual increase of about 10% in the reddening during the seven weeks of the 1996 campaign. Decades-long optical monitoring before and after the campaign is also consistent with modest changes in the extinction from year to year.
Comments9 pages, 9 figures. Comments welcome
