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arXiv · astro-ph/9809007

The infrared and optical variability of OJ 287

J. H. Fan·G. Adam·G. Z. Xie·S. L. Cao·R. G. Lin·Y. P. Qin·Y. Copin·J. M. Bai·X. Zhang·K. H. Li
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Abstract

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.

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J. H. Fan, G. Adam, G. Z. Xie, S. L. Cao, R. G. Lin, Y. P. Qin, Y. Copin, J. M. Bai, X. Zhang, K. H. Li. 1998-09-01. The infrared and optical variability of OJ 287. https://doi.org/10.1051/aas%3A1998314

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