标题： OJ 287的红外和光学变化特性 显示英文标题

标题： The infrared and optical variability of OJ 287

摘要： 本文给出了BL Lac天体OJ287的长期历史光学（UBVRI）和近红外（JHK）数据，并包括一些新的光学（1994年2月至1995年1月）和近红外（1995年11月）观测数据。新的V波段光学数据与其它作者（Sillanpää等人，1996a；Arimoto等人，1997）报告的结果一致；从我们的新观测中获得了B-V颜色指数与V波段星等之间的紧密相关性；新的红外观测表明，在观测期间源在红外波段处于较高水平；从现有文献中得知，UBVRIJHK波段的最大变化分别为：4.72mag、5.93mag、5.18mag、4.45mag、4.07mag、3.87mag、3.78mag和3.54mag；当使用DCF方法时，在光学和近红外波段发现了强相关性，这表明这两个波段具有相同的辐射机制。 显示英文摘要

摘要： In this paper, the long-term historical optical (UBVRI) and near-infrared (JHK) data are presented with some new observations in the optical (February 1994-January 1995) and near-infrared (November 1995) bands included for BL Lac object OJ287. The new optical data in V-band are in agreement with the results reported by other authors (Sillanpaa et al. 1996a; Arimoto et al. 1997), a close correlation between the color index of B-V and the magnitude V has been obtained from our new observations; The new infrared observations presented here indicate that the source was at a high level in the infrared band during the observation period; From the available literature, we have got that the largest variations for UBVRIJHK bands are respectively: 4.72mag, 5.93mag, 5.18mag, 4.45mag, 4.07mag, 3.87mag, 3.78mag, and 3.54mag. A strong correlation is found between the optical and near-infrared bands when the DCF method is used, which suggests that these two bands have the same emission mechanism.