Infrared variability of BL Lacertae

Details Infrared variability of BL Lacertae Infrared variability of BL Lacertae

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..133..217f&link_type=abstract

Astronomy and Astrophysics Supplement, v.133, p.217-220

Astronomy and Astrophysics

Astrophysics

16

Infrared: Galaxies, Bl Lacertae Objects: Bl Lac

Scientific paper

In this paper, the historic light curves of BL Lacertae in the infrared (JHK) bands have been constructed from the published literature. Maximum variations of Delta J = 2fm29 , Delta H = 2fm42 , and Delta K = 2fm93 and average color indices of J-H = 0.78 +/- 0.11, H-K = 0.78 +/- 0.12, and J-K = 1.55 +/- 0.13 have been found. The relation between the color index and the brightness of the source and the correlation of color-color indices have been investigated. Our analysis shows that there is no clear correlation between the color index and the brightness, and the emission mechanism is non-thermal in the near-infrared.

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