Infrared variability properties of the blazar 3C 279

Jiang, Fan

doi:10.1046/j.1365-8711.1999.02767.x

Cited by 40 publications

(25 citation statements)

References 35 publications

(60 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The infrared light curve shows a period of 7.1 ± 0.44 years (Fan 1999). The present work shows periods of 5.1 ± 0.…”

Section: Pks 1253-055 (3c 279)mentioning

confidence: 99%

Radio variability properties for radio sources

Jiang

Liu²,

Yuan³

et al. 2006

A&A

Self Cite

View full text Add to dashboard Cite

In this paper, we used the database of the university of Michigan Radio Astronomy Observatory (UMRAO) at three (4.8 GHz, 8.0 GHZ, and 14.5 GHz) radio frequency to analyze the radio light curves by the power spectral analysis method in search of possible periodicity. The analysis results showed that the radio sources display astrophysically meaningful periodicity ranging from 2.2 to 20.8 years in their light curves at the three frequencies. We also calculated the variability parameters and investigated the correlations between the variability parameter and the flux density. For the variability parameters, we found that the parameters at higher frequency are higher than those in the lower frequency. In addition, the variability parameters of BL Lacertae objects are larger than those of flat-spectrum radio quasars. suggesting that they are more variable than flat spectrum radio quasars.

show abstract

“…The infrared light curve shows a period of 7.1 ± 0.44 years (Fan 1999). The present work shows periods of 5.1 ± 0.…”

Section: Pks 1253-055 (3c 279)mentioning

confidence: 99%

Radio variability properties for radio sources

Jiang

Liu²,

Yuan³

et al. 2006

A&A

Self Cite

View full text Add to dashboard Cite

show abstract

“…Changes in K of up to four mags have been seen in some blazars with little change in their infrared colours (e.g. Fan 1999;Hagen-Thorn et al 1994). In the particular case of PKS 2005-489, the K mag changed only by 0.32 mag during the observations, which is relatively little for this class of objects.…”

Section: Infrared Observationsmentioning

confidence: 99%

The 0.1-200 keV spectrum of the blazar PKS 2005-489 during an active state

Tagliaferri

Ghisellini

Giommi³

et al. 2001

A&A

View full text Add to dashboard Cite

Abstract. The bright BL Lac object PKS 2005-489 was observed by BeppoSAX on November 1-2, 1998, following an active X-ray state detected by RossiXTE. The source, detected between 0.1 and 200 keV, was in a very high state with a continuum well fitted by a steepening spectrum due to synchrotron emission only. Our X-ray spectrum is the flattest ever observed for this source. The different X-ray spectral slopes and fluxes, as measured by various satellites, are consistent with relatively little changes of the peak frequency of the synchrotron emission, always located below 10 17 Hz. We discuss these results in the framework of synchrotron self-Compton models. We found that for the BeppoSAX observation, the synchrotron peak frequency is between 10 15 and 2.5 10 16 Hz, depending on the model assumptions.

show abstract

“…If this feature is real, then it implies an effect of the host galaxy. When the brightness of the source decreases, the contribution from the host galaxy becomes increasingly obvious [31] . Fig.5 shows clearly the rather strong correlation between the color index (B − R) and the color index (B − V ), (r = 0.73, p < 10 −4 ).…”

Section: Discussionmentioning

confidence: 99%