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X-Ray Spectral Variability of the TeV High-energy Peaked Blazar PG 1553+113 with XMM-Newton
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Minimalist approach to BL Lacertae: Explaining gamma-ray spectral and temporal variability with a single physical parameter
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Spectropolarimetry of synchrotron radiation from relativistic electrons with anisotropic pitch-angle and various energy distributions
Paul C W Lai, Kaye J Li, Y X Jane Yap, Kinwah Wu and Albert K H Kong Monthly Notices of the Royal Astronomical Society 542(2) 902 (2025) https://doi.org/10.1093/mnras/staf1295
Sub-day time-scale X-ray spectral variability of the TeV blazars Mrk 421 and 1ES 1959+650
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The origin of mid-infrared colors in γ-ray blazars
Probing X-Ray Timing and Spectral Variability in the Blazar PKS 2155–304 over a Decade of XMM-Newton Observations
Gopal Bhatta, Suvas Chandra Chaudhary, Niraj Dhital, Tek P. Adhikari, Maksym Mohorian, Adithiya Dinesh, Radim Pánis, Raghav Neupane and Yogesh Singh Maharjan The Astrophysical Journal 981(2) 118 (2025) https://doi.org/10.3847/1538-4357/adb0c9
Spectral Energy Distribution Variability of the Blazar OJ 287 During 2009–2021
Wenwen Zuo, Alok C. Gupta, Minfeng Gu, Mauri J. Valtonen, Svetlana G. Jorstad, Margo F. Aller, Anne Lähteenmäki, Sebastian Kiehlmann, Pankaj Kushwaha, Hugh D. Aller, Liang Chen, Anthony C. S. Readhead, Merja Tornikoski and Qi Yuan The Astrophysical Journal 979(2) 210 (2025) https://doi.org/10.3847/1538-4357/ad9f30
Probing spectral evolution and intrinsic variability of Mkn 421: A multi-epoch AstroSat study of X-ray spectra
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M Osorio-Archila, M M González and J R Sacahui Monthly Notices of the Royal Astronomical Society 536(4) 3242 (2025) https://doi.org/10.1093/mnras/stae2767
A Study of Particle Acceleration in Blazar Jets
Hubing Xiao, Wenxin Yang, Yutao Zhang, Shaohua Zhang, Junhui Fan, Liping Fu and Jianghe Yang The Astrophysical Journal 966(1) 99 (2024) https://doi.org/10.3847/1538-4357/ad38bd
Signatures of particle diffusion in the x-ray spectrum of the blazar Mkn 421
Integrated Study of X-Ray Spectrum and Time Lags for HBL Mrk 421 within the Framework of the Multiple-zone Leptonic Model
Wen 文 Hu 胡, Jia-Lai 嘉来 Kang 康, Zhen-Yi 振翼 Cai 蔡, Jun-Xian 俊贤 Wang 王, Zhen-Bo 镇波 Su 苏 and Guang-Cheng 广成 Xiao 肖 The Astrophysical Journal 972(1) 31 (2024) https://doi.org/10.3847/1538-4357/ad5af4
Multiwavelength Study of Extreme High-energy Peaked BL Lac Source 1ES 0229+200 Using Ultraviolet, X-Ray, and γ-Ray Observations
The Spectral Energy Distributions for 4FGL Blazars
J. H. Yang, J. H. Fan, Y. Liu, M. X. Tuo, Z. Y. Pei, W. X. Yang, Y. H. Yuan, S. L. He, S. H. Wang, X. C. Wang, X. J. Chen, X. H. Qu, Q. Cao, Q. Y. Tao, Y. L. Zhang, C. Q. Liu, J. J. Nie, L. F. Liu, D. K. Jiang, A. N. Jiang, B. Liu and R. S. Yang The Astrophysical Journal Supplement Series 262(1) 18 (2022) https://doi.org/10.3847/1538-4365/ac7deb
X-Ray Intraday Variability of the TeV Blazar Markarian 421 with XMM-Newton
A Priyana Noel, Haritma Gaur, Alok C. Gupta, Alicja Wierzcholska, Michał Ostrowski, Vinit Dhiman and Gopal Bhatta The Astrophysical Journal Supplement Series 262(1) 4 (2022) https://doi.org/10.3847/1538-4365/ac7799
Do radiative losses determine the characteristic emission of the blazar Mkn 421?
C Baheeja, S Sahayanathan, Frank M Rieger, Sitha K Jagan and C D Ravikumar Monthly Notices of the Royal Astronomical Society 514(2) 3074 (2022) https://doi.org/10.1093/mnras/stac1548
Flux and spectral variability of Mrk 421 during its moderate activity state usingNuSTAR: Possible accretion disc contribution?
Correlations between X-ray spectral parameters of Mkn 421 using long-term Swift–XRT data
Rukaiya Khatoon, Zahir Shah, Jyotishree Hota, et al. Monthly Notices of the Royal Astronomical Society 515(3) 3749 (2022) https://doi.org/10.1093/mnras/stac1964
Convex X-ray spectra of PKS 2155-304 and constraints on the minimum electron energy
Sitha K Jagan, S Sahayanathan, Frank M Rieger and C D Ravikumar Monthly Notices of the Royal Astronomical Society 506(3) 3996 (2021) https://doi.org/10.1093/mnras/stab1993
The Hot Circumgalactic Medium of the Milky Way: Evidence for Supervirial, Virial, and Subvirial Temperatures; Nonsolar Chemical Composition; and Nonthermal Line Broadening
Understanding the X-ray spectral curvature of Mkn 421 using broad-band AstroSat observations
Jyotishree Hota, Zahir Shah, Rukaiya Khatoon, et al. Monthly Notices of the Royal Astronomical Society 508(4) 5921 (2021) https://doi.org/10.1093/mnras/stab2903
On the Origin and Evolution of Curvature of the Spectral Energy Distribution of Fermi Bright Blazars
Spectroscopic Monitoring of Blazar S5 0716+714: Brightness-dependent Spectral Behavior
Hai-Cheng Feng, Sen. Yang, Zi-Xu. Yang, H. T. Liu, J. M. Bai, Sha-Sha. Li, X. H. Zhao, Jin. Zhang, Y. B. Li, M. Xiao, Y. X. Xin, L. F. Xing, K. X. Lu, L. Xu, J. G. Wang, C. J. Wang, X. L. Zhang, J. J. Zhang, B. L. Lun and S. S. He The Astrophysical Journal 902(1) 42 (2020) https://doi.org/10.3847/1538-4357/abb366
Unfolding the X-ray spectral curvature of Mkn 421 for further clues
Pranjupriya Goswami, Sunder Sahayanathan, Atreyee Sinha and Rupjyoti Gogoi Monthly Notices of the Royal Astronomical Society 499(2) 2094 (2020) https://doi.org/10.1093/mnras/staa3022
Multi-wavelength observations of the BL Lac object Fermi J1544-0649: One year after its awakening
P.H.T. Tam, P.S. Pal, Y.D. Cui, N. Jiang, Y. Sotnikova, C.W. Yang, L.Z. Wang, B.T. Tang, Y.B. Li, J. Mao, A.K.H. Kong, Z.H. Zhong, J. Ding, T. Mufakharov, J.F. Fan, L.M. Dou, R.F. Shen and Y.L. Ai Journal of High Energy Astrophysics 26 45 (2020) https://doi.org/10.1016/j.jheap.2020.02.004
X-ray Flux and Spectral Variability of the TeV Blazars Mrk 421 and PKS 2155-304
High-energy neutrino flux from individual blazar flares
Foteini Oikonomou, Kohta Murase, Paolo Padovani, Elisa Resconi and Peter Mészáros Monthly Notices of the Royal Astronomical Society 489(3) 4347 (2019) https://doi.org/10.1093/mnras/stz2246
Systematic Physical Characterization of the γ-Ray Spectra of 2FHL Blazars
Jacobus P. van den Berg, Markus Böttcher, Alberto Domínguez and Marcos López-Moya The Astrophysical Journal 874(1) 47 (2019) https://doi.org/10.3847/1538-4357/aafdfd
LOFAR Observations of 4C+19.44: On the Discovery of Low-frequency Spectral Curvature in Relativistic Jet Knots
D. E. Harris, J. Moldón, J. R. R. Oonk, F. Massaro, A. Paggi, A. Deller, L. Godfrey, R. Morganti and S. G. Jorstad The Astrophysical Journal 873(1) 21 (2019) https://doi.org/10.3847/1538-4357/ab01ff
Signature of Stochastic Acceleration and Cooling Processes in an Outburst Phase of the TeV Blazar ON 231
X-Ray Spectral Variations of Synchrotron Peak in BL Lacs
Yijun Wang, Shifu Zhu, Yongquan Xue, Minfeng Gu, Shanshan Weng and Huynh Anh N. Le The Astrophysical Journal 885(1) 8 (2019) https://doi.org/10.3847/1538-4357/ab4416
An XMM-Newton look at the strongly variable radio-weak BL Lac Fermi J1544–0639
Signature of inverse Compton emission from blazars
Haritma Gaur, Prashanth Mohan, Alicja Wierzcholska and Minfeng Gu Monthly Notices of the Royal Astronomical Society 473(3) 3638 (2018) https://doi.org/10.1093/mnras/stx2553
On the intrinsic shape of the gamma-ray spectrum for Fermi blazars
SimultaneousSwiftand Rapid Eye Mount telescope observations of the blazar PKS 0537–441
Xiao-Pan Li, Yu-Hui Luo, Li Zhang, et al. Monthly Notices of the Royal Astronomical Society 464(4) 3972 (2017) https://doi.org/10.1093/mnras/stw2652
The physical properties ofFermiTeV BL Lac objects’ jets
N. Ding, X. Zhang, D. R. Xiong and H. J. Zhang Monthly Notices of the Royal Astronomical Society 464(1) 599 (2017) https://doi.org/10.1093/mnras/stw2347
The Hard X-Ray Emission of the Blazar PKS 2155–304
Haritma Gaur, Liang Chen, R. Misra, S. Sahayanathan, M. F. Gu, P. Kushwaha and G. C. Dewangan The Astrophysical Journal 850(2) 209 (2017) https://doi.org/10.3847/1538-4357/aa95bc
MULTIWAVELENGTH STUDY OF QUIESCENT STATES OF Mrk 421 WITH UNPRECEDENTED HARD X-RAY COVERAGE PROVIDED BY NuSTAR IN 2013
M. Baloković, D. Paneque, G. Madejski, A. Furniss, J. Chiang, M. Ajello, D. M. Alexander, D. Barret, R. D. Blandford, S. E. Boggs, F. E. Christensen, W. W. Craig, K. Forster, P. Giommi, B. Grefenstette, C. Hailey, F. A. Harrison, A. Hornstrup, T. Kitaguchi, J. E. Koglin, K. K. Madsen, P. H. Mao, H. Miyasaka, K. Mori, M. Perri, et al. The Astrophysical Journal 819(2) 156 (2016) https://doi.org/10.3847/0004-637X/819/2/156
NUSTAR, SWIFT, AND GROND OBSERVATIONS OF THE FLARING MEV BLAZAR PMN J0641−0320
M. Ajello, G. Ghisellini, V. S. Paliya, D. Kocevski, G. Tagliaferri, G. Madejski, A. Rau, P. Schady, J. Greiner, F. Massaro, M. Baloković, R. Bühler, M. Giomi, L. Marcotulli, F. D’Ammando, D. Stern, S. E. Boggs, F. E. Christensen, W. W. Craig, C. J. Hailey, F. A. Harrison and W. W. Zhang The Astrophysical Journal 826(1) 76 (2016) https://doi.org/10.3847/0004-637X/826/1/76
Dynamic changes of emitting electron distribution in the jet of 3C 279: signatures of acceleration and cooling
Dahai Yan, Jianjian He, Jinyuan Liao, Li Zhang and Shuang-Nan Zhang Monthly Notices of the Royal Astronomical Society 456(2) 2173 (2016) https://doi.org/10.1093/mnras/stv2829
Testing one-zone synchrotron-self-Compton models with spectral energy distributions of Mrk 421
Qianqian Zhu, Dahai Yan, Pengfei Zhang, et al. Monthly Notices of the Royal Astronomical Society 463(4) 4481 (2016) https://doi.org/10.1093/mnras/stw2346
The long-termSwiftobservations of the high-energy peaked BL Lacertae source 1ES 1959+650
B. Kapanadze, P. Romano, S. Vercellone, et al. Monthly Notices of the Royal Astronomical Society 457(1) 704 (2016) https://doi.org/10.1093/mnras/stv3004
THE SPECTRAL ENERGY DISTRIBUTIONS OF FERMI BLAZARS
J. H. Fan, J. H. Yang, Y. Liu, G. Y. Luo, C. Lin, Y. H. Yuan, H. B. Xiao, A. Y. Zhou, T. X. Hua and Z. Y. Pei The Astrophysical Journal Supplement Series 226(2) 20 (2016) https://doi.org/10.3847/0067-0049/226/2/20
An emergence of a new polarized emission region in blazar Mrk 421 associated with an X-ray flare
Ryosuke Itoh, Yasushi Fukazawa, Yasuyuki T. Tanaka, Koji S. Kawabata, Katsutoshi Takaki, Kazuma Hayashi, Makoto Uemura, Takahiro Ui, Mahito Sasada, Masayuki Yamanaka and Michitoshi Yoshida Publications of the Astronomical Society of Japan 67(3) (2015) https://doi.org/10.1093/pasj/psv016
NEAR-EQUIPARTITION JETS WITH LOG-PARABOLA ELECTRON ENERGY DISTRIBUTION AND THE BLAZAR SPECTRAL-INDEX DIAGRAMS
MICROVARIABILITY OF 0.3-10 keV FLUX IN HBL SOURCE PKS 2155-304
BIDZINA KAPANADZE, SERGO KAPANADZE and MANANA VARDOSANIDZE International Journal of Modern Physics: Conference Series 28 (2014) https://doi.org/10.1142/S2010194514601793
The X-ray behaviour of the high-energy peaked BL Lacertae source PKS 2155−304 in the 0.3–10 keV band
B. Kapanadze, P. Romano, S. Vercellone and S. Kapanadze Monthly Notices of the Royal Astronomical Society 444(2) 1077 (2014) https://doi.org/10.1093/mnras/stu1504
CURVATURE OF THE SPECTRAL ENERGY DISTRIBUTIONS OF BLAZARS
Bright X-Ray Flares from the BL Lac Object Markarian 421, Detected with MAXI in 2010 January and February
Naoki Isobe, Kousuke Sugimori, Nobuyuki Kawai, Yoshihiro Ueda, Hitoshi Negoro, Mutsumi Sugizaki, Masaru Matsuoka, Arata Daikyuji, Satoshi Eguchi, Kazuo Hiroi, Masaki Ishikawa, Ryoji Ishiwata, Kazuyoshi Kawasaki, Masashi Kimura, Mitsuhiro Kohama, Tatehiro Mihara, Sho Miyoshi, Mikio Morii, Yujin E. Nakagawa, Satoshi Nakahira, Motoki Nakajima, Hiroshi Ozawa, Tetsuya Sootome, Motoko Suzuki, Hiroshi Tomida, et al. Publications of the Astronomical Society of Japan 62(6) L55 (2010) https://doi.org/10.1093/pasj/62.6.L55
Swift observations of the very intense flaring activity of Mrk 421 during 2006. I.
Phenomenological picture of electron acceleration and predictions for
MeV/GeV emission