Rapid X-ray and optical variability in the X-ray selected BL Lacertae object IE 1402.3 + 0416

1986 ◽  
Vol 303 ◽  
pp. 596 ◽  
Author(s):  
Paolo Giommi ◽  
Paul Barr ◽  
Isabella M. Gioia ◽  
Tommaso Maccacaro ◽  
Rudolph Schild ◽  
...  
Keyword(s):  
Optical Variability ◽  
X Ray ◽  
Bl Lacertae

X‐Ray Absorption in the BL Lacertae Object PKS 0548−322

1998 ◽  
Vol 502 (2) ◽  
pp. 630-639 ◽  
Author(s):  
Rita M. Sambruna ◽  
Richard F. Mushotzky
Keyword(s):  
X Ray ◽  
Bl Lacertae ◽  
X Ray Absorption

scholarly journals Multiband optical variability studies of BL Lacertae

2015 ◽  
Vol 450 (1) ◽  
pp. 541-551 ◽  
Author(s):  
Aditi Agarwal ◽  
Alok C. Gupta
Keyword(s):  
Optical Variability ◽  
Bl Lacertae

scholarly journals X-ray/UV/optical variability of NGC 4593 with Swift: reprocessing of X-rays by an extended reprocessor

2018 ◽  
Vol 480 (3) ◽  
pp. 2881-2897 ◽  
Author(s):  
I M McHardy ◽  
S D Connolly ◽  
K Horne ◽  
E M Cackett ◽  
J Gelbord ◽  
...  
Keyword(s):  
Optical Variability ◽  
X Rays ◽  
X Ray

CCD Photometry and Optical Variability of Gamma-Ray-loud BL Lacertae Object OJ 287 in a Low, Fainter State

2007 ◽  
Vol 133 (5) ◽  
pp. 1995-2000 ◽  
Author(s):  
X. Zhang ◽  
G. Zhao ◽  
Y. G. Zheng ◽  
L. Ma ◽  
Z. H. Xie ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Optical Variability ◽  
Ccd Photometry ◽  
Bl Lacertae

scholarly journals The intraday variability in the radio-selected and X-ray-selected BL Lacertae objects

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

scholarly journals Correlated X-ray/optical variability in the quasar MR 2251−178

2008 ◽  
Vol 389 (3) ◽  
pp. 1479-1488 ◽  
Author(s):  
P. Arévalo ◽  
P. Uttley ◽  
S. Kaspi ◽  
E. Breedt ◽  
P. Lira ◽  
...  
Keyword(s):  
Optical Variability ◽  
X Ray

Two new BL Lacertae objects discovered in the error boxes of hard X-ray sources

2005 ◽  
pp. 257-260
Author(s):  
G. Tagliaferri ◽  
P. Giommi ◽  
K. Beuermann ◽  
G. Branduardi-Raymont ◽  
R. Brissenden ◽  
...  
Keyword(s):  
Bl Lacertae Objects ◽  
X Ray ◽  
Bl Lacertae

The redshift of the X-ray selected BL Lacertae object H0414 + 009

1991 ◽  
Vol 101 ◽  
pp. 818 ◽  
Author(s):  
Jules P. Halpern ◽  
Vera S. Chen ◽  
Greg M. Madejski ◽  
Gary A. Chanan
Keyword(s):  
X Ray ◽  
Bl Lacertae

Far-red surface photometry of the X-ray emitting BL Lacertae object PKS 0548-322

1979 ◽  
Vol 233 ◽  
pp. 504 ◽  
Author(s):  
D. Weistrop ◽  
B. A. Smith ◽  
H. J. Reitsema
Keyword(s):  
Surface Photometry ◽  
X Ray ◽  
Bl Lacertae
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