Detailed Information on Publication Record

DINESH, Adithiya, Gopal BHATTA, Tek P ADHIKARI, Maksym MOHORIAN, Niraj DHITAL, Suvas C CHAUDHARY, Radim PÁNIS and Dariusz GORA. Constraining X-Ray Variability of the Blazar 3C 273 Using XMM-Newton Observations over Two Decades. Astrophysical Journal. GB - Spojené království Velké Británie a, 2023, vol. 955, No 2, p. "121-1"-"121-13", 13 pp. ISSN 0004-637X. Available from: https://dx.doi.org/10.3847/1538-4357/acf316.

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TY  - JOUR
ID  - 77346
AU  - Dinesh, Adithiya - Bhatta, Gopal - Adhikari, Tek P - Mohorian, Maksym - Dhital, Niraj - Chaudhary, Suvas C - Pánis, Radim - Gora, Dariusz
PY  - 2023
TI  - Constraining X-Ray Variability of the Blazar 3C 273 Using XMM-Newton Observations over Two Decades
JF  - Astrophysical Journal
VL  - 955
IS  - 2
SP  - "121-1"-"121-13"
EP  - "121-1"-"121-13"
SN  - 0004637X
KW  - log parabolic spectra;bl-lac objects;particle-acceleration;intraday variability;optical variability;S5 0716+714;gamma-rays;emission;jet;model
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/acf316
N2  - Blazars exhibit relentless variability across diverse spatial and temporal frequencies. The study of long- and short-term variability properties observed in the X-ray band provides insights into the inner workings of the central engine. In this work, we present timing and spectral analyses of the blazar 3C 273 using the X-ray observations from the XMM-Newton telescope covering the period from 2000 to 2020. The methods of timing analyses include estimation of fractional variability, long- and short-term flux distribution, rms-flux relation, and power spectral density analysis. The spectral analysis include estimating a model-independent flux hardness ratio and fitting the observations with multiplicative and additive spectral models such as power law, log-parabola, broken power law, and blackbody. The blackbody represents the thermal emission from the accretion disk, while the other models represent the possible energy distributions of the particles emitting synchrotron radiation in the jet. During the past two decades, the source flux changed by a factor of three, with a considerable fractional variability of 27%. However, the intraday variation was found to be moderate. Flux distributions of the individual observations were consistent with a normal or log-normal distribution, while the overall flux distribution including all observations appears to be rather multimodal and of a complex shape. The spectral analyses indicate that a log-parabola added to a blackbody gives the best fit for most of the observations. The results indicate a complex scenario in which the variability can be attributed to the intricate interaction between the disk/corona system and the jet.
ER  -

Basic information
Original name	Constraining X-Ray Variability of the Blazar 3C 273 Using XMM-Newton Observations over Two Decades
Authors	DINESH, Adithiya, Gopal BHATTA, Tek P ADHIKARI, Maksym MOHORIAN, Niraj DHITAL, Suvas C CHAUDHARY, Radim PÁNIS (703 Slovakia, belonging to the institution) and Dariusz GORA.
Edition	Astrophysical Journal, GB - Spojené království Velké Británie a, 2023, 0004-637X.

Other information
Original language	English
Type of outcome	Article in a journal
Field of Study	10308 Astronomy
Country of publisher	United Kingdom of Great Britain and Northern Ireland
Confidentiality degree	is not subject to a state or trade secret
WWW	URL
RIV identification code	RIV/47813059:19630/23:A0000266
Organization unit	Institute of physics in Opava
Doi	http://dx.doi.org/10.3847/1538-4357/acf316
UT WoS	001119181300001
Keywords in English	log parabolic spectra;bl-lac objects;particle-acceleration;intraday variability;optical variability;S5 0716+714;gamma-rays;emission;jet;model
Tags	RIV24, UF
Tags	International impact, Reviewed
Links	GA23-07043S, research and development project.
Changed by	Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 16/2/2024 10:50.

Abstract
Blazars exhibit relentless variability across diverse spatial and temporal frequencies. The study of long- and short-term variability properties observed in the X-ray band provides insights into the inner workings of the central engine. In this work, we present timing and spectral analyses of the blazar 3C 273 using the X-ray observations from the XMM-Newton telescope covering the period from 2000 to 2020. The methods of timing analyses include estimation of fractional variability, long- and short-term flux distribution, rms-flux relation, and power spectral density analysis. The spectral analysis include estimating a model-independent flux hardness ratio and fitting the observations with multiplicative and additive spectral models such as power law, log-parabola, broken power law, and blackbody. The blackbody represents the thermal emission from the accretion disk, while the other models represent the possible energy distributions of the particles emitting synchrotron radiation in the jet. During the past two decades, the source flux changed by a factor of three, with a considerable fractional variability of 27%. However, the intraday variation was found to be moderate. Flux distributions of the individual observations were consistent with a normal or log-normal distribution, while the overall flux distribution including all observations appears to be rather multimodal and of a complex shape. The spectral analyses indicate that a log-parabola added to a blackbody gives the best fit for most of the observations. The results indicate a complex scenario in which the variability can be attributed to the intricate interaction between the disk/corona system and the jet.

Abstract

Blazars exhibit relentless variability across diverse spatial and temporal frequencies. The study of long- and short-term variability properties observed in the X-ray band provides insights into the inner workings of the central engine. In this work, we present timing and spectral analyses of the blazar 3C 273 using the X-ray observations from the XMM-Newton telescope covering the period from 2000 to 2020. The methods of timing analyses include estimation of fractional variability, long- and short-term flux distribution, rms-flux relation, and power spectral density analysis. The spectral analysis include estimating a model-independent flux hardness ratio and fitting the observations with multiplicative and additive spectral models such as power law, log-parabola, broken power law, and blackbody. The blackbody represents the thermal emission from the accretion disk, while the other models represent the possible energy distributions of the particles emitting synchrotron radiation in the jet. During the past two decades, the source flux changed by a factor of three, with a considerable fractional variability of 27%. However, the intraday variation was found to be moderate. Flux distributions of the individual observations were consistent with a normal or log-normal distribution, while the overall flux distribution including all observations appears to be rather multimodal and of a complex shape. The spectral analyses indicate that a log-parabola added to a blackbody gives the best fit for most of the observations. The results indicate a complex scenario in which the variability can be attributed to the intricate interaction between the disk/corona system and the jet.