Analysis of the Aperture Photometry for Blazar

HONG Shan-wei; ZHOU Shu-bai; CHEN luo-en

Astronomical Research and Technology > 2008 > 5(4): 330-336.

HONG Shan-wei, ZHOU Shu-bai, CHEN luo-en. Analysis of the Aperture Photometry for Blazar[J]. Astronomical Research and Technology, 2008, 5(4): 330-336.

Citation:

HONG Shan-wei, ZHOU Shu-bai, CHEN luo-en. Analysis of the Aperture Photometry for Blazar[J]. Astronomical Research and Technology, 2008, 5(4): 330-336.

Citation:

HONG Shan-wei, ZHOU Shu-bai, CHEN luo-en. Analysis of the Aperture Photometry for Blazar[J]. Astronomical Research and Technology, 2008, 5(4): 330-336.

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Analysis of the Aperture Photometry for Blazar

1.
Department of Physics, Yunnan University, Kunming 650091, China
2.
Department of Physics, Yuxi Normal College, Yunnan Yuxi 653100, China

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Received Date: January 27, 2007
Revised Date: April 06, 2008
Published Date: October 14, 2008

Graphical Abstract

Abstract

Abstract

In this paper, we studied the influence of the parameters in IRAF software package for differential photometry of blazar by using different values of the photometric aperture, background, and width of sky annulus. The results indicate that the selected values of aperture parameters affect the differential photometry greatly, but the values of the width of sky annulus affect little, and the background parameter has hardly any effect on the differential photometry. We also discussed a correction factor Γ, to account for the effect of incorrect choice of the standard stars used in the differential photometry on studying microvariability of blazer. We applied the correction to our analysis of the data of PKS1510-089 and OJ 248 observed in March 2007.
- AGN,
- Photometry

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