Infrared Variation of BL Lacertae Object PKS 0735+178

Authors: Lin R.G.; Fan J.H.

Source: Astrophysics and Space Science, Volume 259, Number 1, 1998 , pp. 67-75(9)

Publisher: Springer

Abstract:

In this paper, the long-term ( about 20 years) near-infrared data have been compiled from the published literature for BL Lac object PKS 0735+178; The light curve in the infrared (JHK) bands have been presented; The maximum variations of J=2m .47, H=2m .30, and K = 2m.40, and color indices of J- H=0.86 ± 0.11, J- K=1.71 ± 0.16, and H-K = 0.86 ± 0.12 have been obtained from the data. It is found that the spectrum changes with the brightness of the source in the infrared bands; The variations in the optical and infrared bands are found to be correlated suggesting that the emission mechanisms in the two bands are associated.

Language: English

Document Type: Regular paper

Affiliations: 1: Center for Astrophysics, Guangzhou Normal University, Guangzhou 510400, China, E-mail: jhfan@guangztc.edu.cn

Publication date: 1998-01-01

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• By this author: Lin R.G. ;  Fan J.H.

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