A spectral study of four X-ray-selected BL Lacertae objects with EXOSAT

1993 ◽  
Vol 408 ◽  
pp. 452 ◽  
Author(s):  
R. M. Sambruna ◽  
P. Barr ◽  
L. Maraschi ◽  
G. Tagliaferri ◽  
A. Treves
2021 ◽  
Vol 57 (1) ◽  
pp. 133-145
Author(s):  
A. Ata Saad ◽  
Ahmed M. Nasser ◽  
Ahmed M. Abdelbar ◽  
M. M Beheary

We present a detailed spectral study of Suzaku observations of three blazars (Mrk 421, Mrk 501, and 1ES1426+428). The X-ray properties of our sample are derived by extracting the BL Lacertae sample spectra, and fitted by five models. The fit was in the soft X-ray band (0.8 - 10.0 keV). These models give similar results. By comparing the fits from the different models, we find that the (zbremss+zpowerlw) model is the best one to represent the data. An F-test is applied to compare the (zbremss+zpowerlw) model with the simple one zpower law. To test the X-ray variability of our BL Lacertae sample, we fit their spectra extracted from the same instrument with the same procedure by the same model to estimate their X-ray flux and luminosity. The estimated fluxes are compared to check their variability. We find that the flux variability ranges are 3.06, 0.12, 0.37 × 10−10 erg s−1 cm−2 for Mrk 421, Mrk 501, and 1ES1426+428, respectively.


1998 ◽  
Vol 132 (1) ◽  
pp. 83-92 ◽  
Author(s):  
J. M. Bai ◽  
G. Z. Xie ◽  
K. H. Li ◽  
X. Zhang ◽  
W. W. Liu

2005 ◽  
pp. 257-260
Author(s):  
G. Tagliaferri ◽  
P. Giommi ◽  
K. Beuermann ◽  
G. Branduardi-Raymont ◽  
R. Brissenden ◽  
...  

1981 ◽  
Vol 243 ◽  
pp. 53 ◽  
Author(s):  
D. M. Worrall ◽  
E. A. Boldt ◽  
S. S. Holt ◽  
R. F. Mushotzky ◽  
P. J. Serlemitsos

1989 ◽  
Vol 345 ◽  
pp. 140 ◽  
Author(s):  
R. A. Remillard ◽  
I. R. Tuohy ◽  
R. J. V. Brissenden ◽  
D. A. H. Buckley ◽  
D. A. Schwartz ◽  
...  

1991 ◽  
Vol 380 ◽  
pp. 49 ◽  
Author(s):  
Simon L. Morris ◽  
John T. Stocke ◽  
Isabella M. Gioia ◽  
Rudy E. Schild ◽  
Anna Wolter ◽  
...  

1996 ◽  
Vol 465 ◽  
pp. 1010 ◽  
Author(s):  
Eric S. Perlman ◽  
John T. Stocke ◽  
Q. Daniel Wang ◽  
Simon L. Morris

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