Marek Sikora

Marek Sikora 's AcademicInfluence.com Rankings

Marek Sikora

Physics

#6596

World Rank

#8560

Historical Rank

Astrophysics

#703

World Rank

#752

Historical Rank

Astronomy

#1104

World Rank

#1805

Historical Rank

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Physics

Why Is Marek Sikora Influential?

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According to Wikipedia, Marek Sikora is a Polish astronomer. He achieved his Habilitation of astrophysics in 1990 from University of Warsaw. He received the title of professor in 1999. Currently he works as a professor in the Centrum Astronomiczne im. Mikołaja Kopernika PAN, Polish Academy of Sciences in Warsaw. He is interested mainly high energy astrophysics, astrophysical jets, the nuclei of active galaxies, and sources of cosmic radiation.

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Marek Sikora 's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Comptonization of Diffuse Ambient Radiation by a Relativistic Jet: The Source of Gamma Rays from Blazars? (1994) (920)
Introducing the CTA concept (2013) (584)
Radio Loudness of Active Galactic Nuclei: Observational Facts and Theoretical Implications (2006) (366)
Comptonization of Infrared Radiation from Hot Dust by Relativistic Jets in Quasars (2000) (287)
CONSTRAINING EMISSION MODELS OF LUMINOUS BLAZAR SOURCES (2009) (254)
Search for a dark matter annihilation signal from the galactic center halo with H.E.S.S. (2011) (250)
Multiwavelength Observations of a Dramatic High-Energy Flare in the Blazar 3C 279 (1997) (224)
Radio imaging of the very-high-energy gamma-ray emission region in the central engine of a radio galaxy. (2009) (185)
Detection of Gamma Rays from a Starburst Galaxy (2009) (183)
Klein-Nishina effects in the spectra of non-thermal sources immersed in external radiation fields (2005) (172)
On Pair Content and Variability of Subparsec Jets in Quasars (1999) (160)
On the Geometry of the X-Ray-emitting Region in Seyfert Galaxies (1995) (152)
MINUTE-TIMESCALE >100 MeV γ-RAY VARIABILITY DURING THE GIANT OUTBURST OF QUASAR 3C 279 OBSERVED BY FERMI-LAT IN 2015 JUNE (2016) (149)
Learning about Active Galactic Nucleus Jets from Spectral Properties of Blazars (1997) (138)
Are Quasar Jets Dominated by Poynting Flux? (2005) (133)
Black Hole Spin and Galactic Morphology (2007) (132)
THE STRUCTURE AND EMISSION MODEL OF THE RELATIVISTIC JET IN THE QUASAR 3C 279 INFERRED FROM RADIO TO HIGH-ENERGY γ-RAY OBSERVATIONS IN 2008–2010 (2012) (129)
Dynamics and high-energy emission of the flaring HST-1 knot in the M 87 jet (2006) (127)
RAPID VARIABILITY OF BLAZAR 3C 279 DURING FLARING STATES IN 2013−2014 WITH JOINT FERMI-LAT, NuSTAR, SWIFT, AND GROUND-BASED MULTI-WAVELENGTH OBSERVATIONS (2015) (126)
FERMI GAMMA-RAY SPACE TELESCOPE OBSERVATIONS OF GAMMA-RAY OUTBURSTS FROM 3C 454.3 IN 2009 DECEMBER AND 2010 APRIL (2010) (126)
Inverse Compton scattering of ambient radiation by a cold relativistic jet - A source of beamed, polarized continuum in blazars? (1987) (123)
Reaction rate and energy-loss rate for photopair production by relativistic nuclei (1992) (120)
Consequences of relativistic proton injection in active galactic nuclei (1990) (113)
DISCOVERY OF VERY HIGH ENERGY γ-RAY EMISSION FROM CENTAURUS A WITH H.E.S.S. (2009) (113)
On Beaming Effects in Afterglow Light Curves (1999) (103)
MAGNETIC FLUX PARADIGM FOR RADIO LOUDNESS OF ACTIVE GALACTIC NUCLEI (2013) (101)
Search for Lorentz Invariance breaking with a likelihood fit of the PKS 2155-304 flare data taken (2011) (100)
THE EVOLUTION OF ACTIVE GALACTIC NUCLEI AND THEIR SPINS (2012) (98)
Multiwavelength Observations of the Powerful Gamma-Ray Quasar PKS 1510–089: Clues on the Jet Composition (2008) (95)
H.E.S.S. constraints on dark matter annihilations towards the sculptor and carina dwarf galaxies (2010) (95)
Gamma-Ray Observations of Active Galactic Nuclei (2016) (90)
Radiative properties of reconnection‐powered minijets in blazars (2010) (89)
Modeling the Production of Flares in Gamma-Ray Quasars (2001) (86)
Electron injection by relativistic protons in active galactic nuclei (1987) (83)
3C 454.3 Reveals the Structure and Physics of Its “Blazar Zone” (2007) (81)
On the spin paradigm and the radio dichotomy of quasars (1998) (75)
ENERGETIC AND RADIATIVE CONSTRAINTS ON HIGHLY RELATIVISTIC JETS (1994) (74)
Very high energy gamma-ray observations of the binary PSR B1259-63/SS2883 around the 2007 Periastron (2009) (71)
On the Nature of MeV Blazars (2002) (71)
High-Energy Gamma Rays from FR I Jets (2003) (71)
Radiation drag in relativistic active galactic nucleus jets (1996) (69)
On black hole evolution in active galactic nuclei (1996) (68)
CONSTRAINING THE LOCATION OF GAMMA-RAY FLARES IN LUMINOUS BLAZARS (2014) (66)
First detection of VHE γ-rays from SN 1006 by HESS (2010) (65)
On Multiwavelength Emission of Large-Scale Quasar Jets (2004) (64)
The MeV spectral tail in Cyg X-1 and optically thin emission of jets (2012) (63)
The 300 kpc Long X-Ray Jet in PKS 1127–145, z = 1.18 Quasar: Constraining X-Ray Emission Models (2006) (63)
A large-particle Monte Carlo code for simulating non-linear high-energy processes near compact objects (1995) (62)
Numerical simulations of radiation from blazar jets (2002) (61)
Relativistic, accreting disks. (1978) (60)
A new SNR with TeV shell-type morphology: HESS J1731-347 (2011) (60)
VHE γ-ray emission of PKS2155-304: Spectral and temporal variability (2010) (60)
X-Ray Observations of BL Lacertae during the 1997 Outburst and Association with Quasar-like Characteristics (1999) (57)
The collimation of particle beams from thick accretion discs (1981) (56)
Core shifts, magnetic fields and magnetization of extragalactic jets (2014) (52)
Jet contributions to the broad-band spectrum of Cyg X-1 in the hard state (2014) (50)
Simultaneous Soft X-Ray and GeV Gamma-Ray Observations of BL Lacertae Object AO 0235+164 (1996) (49)
HERSCHEL PACS AND SPIRE OBSERVATIONS OF BLAZAR PKS 1510−089: A CASE FOR TWO BLAZAR ZONES (2012) (49)
A structure and energy dissipation efficiency of relativistic reconfinement shocks (2008) (48)
Outflows driven by cosmic-ray pressure in broad absorption line QSOs (1991) (47)
MULTI-WAVELENGTH OBSERVATIONS OF BLAZAR AO 0235+164 IN THE 2008–2009 FLARING STATE (2012) (44)
Superluminous Accretion Discs (1981) (44)
CONSTRAINING JET PRODUCTION SCENARIOS BY STUDIES OF NARROW-LINE RADIO GALAXIES (2012) (43)
On the Magnetic Field in the Kiloparsec-Scale Jet of Radio Galaxy M87 (2005) (42)
Discovery of extended VHE γ-ray emission from the vicinity of the young massive stellar cluster Westerlund 1 (2011) (42)
Energetic constraints on a rapid gamma-ray flare in PKS 1222+216 (2012) (40)
The gamma-ray emitting region of the jet in Cyg X-3 (2011) (37)
Jet models for black-hole binaries in the hard spectral state (2013) (36)
The power and production efficiency of blazar jets (2016) (36)
H.E.S.S. OBSERVATIONS OF THE GLOBULAR CLUSTERS NGC 6388 AND M15 AND SEARCH FOR A DARK MATTER SIGNAL (2011) (34)
Does an orbiting star cause periodic modulation of X-rays from NGC6814? (1992) (34)
Solving the mystery of the X-ray periodicity in the Seyfert galaxy NGC6814 (1993) (33)
HESS J1943+213: a candidate extreme BL Lacertae object (2011) (30)
Revisiting the Westerlund 2 field with the HESS telescope array (2010) (30)
TIME-DEPENDENT MODELING OF GAMMA-RAY FLARES IN BLAZAR PKS1510–089 (2015) (28)
A multiwavelength view of the flaring state of PKS 2155-304 in 2006 (2012) (27)
Very-high-energy gamma-ray emission from the direction of the Galactic globular cluster Terzan 5 (2011) (26)
High-energy radiation from active galactic nuclei (1994) (25)
Relativistic neutrons in active galactic nuclei (1989) (25)
Relativistic Hadrons in Cosmic Compact Objects (1991) (25)
FIRST NuSTAR OBSERVATIONS OF THE BL LAC-TYPE BLAZAR PKS 2155-304: CONSTRAINTS ON THE JET CONTENT AND DISTRIBUTION OF RADIATING PARTICLES (2016) (25)
Discovery of hard-spectrum γ-ray emission from the BL Lacertae object 1ES 0414+009 (2012) (25)
A spine–sheath model for strong-line blazars (2015) (24)
ON THE ORIGIN OF X-RAY SPECTRA IN LUMINOUS BLAZARS (2013) (22)
SUZAKU OBSERVATIONS OF LUMINOUS QUASARS: REVEALING THE NATURE OF HIGH-ENERGY BLAZAR EMISSION IN LOW-LEVEL ACTIVITY STATES (2010) (22)
RECONCILING MODELS OF LUMINOUS BLAZARS WITH MAGNETIC FLUXES DETERMINED BY RADIO CORE-SHIFT MEASUREMENTS (2014) (21)
Thermal and dynamical effects of pair production on two-temperature accretion flows (1987) (20)
Magnetization of jets in luminous blazars (2014) (20)
Discovery of VHE γ -rays from the BL Lacertae object PKS 0548-322 (2010) (19)
Disk–Jet Connection in Active Supermassive Black Holes in the Standard Accretion Disk Regime (2017) (18)
Multi-wavelength observations of H 2356-309 (2010) (18)
ON THE ORIGIN OF THE γ-RAY/OPTICAL LAGS IN LUMINOUS BLAZARS (2012) (18)
Soft X-Ray Precursors of the Nonthermal Flares in Blazars: Theoretical Predictions (2004) (17)
On the efficiency of jet production in FR II radio galaxies and quasars (2016) (17)
Comparison of hard X-ray spectra of luminous radio galaxies and their radio-quiet counterparts (2018) (16)
Discovery of the source HESS J1356-645 associated with the young and energetic PSR J1357-6429 (2011) (16)
Radio bimodality: Spin, accretion mode, or both? (2008) (15)
Discovery and follow-up studies of the extended, off-plane, VHE gamma-ray source HESS J1507-622 (2010) (14)
X-Ray Emission from the Quasar PKS 1127–145: Comptonized Infrared Photons on Parsec Scales (2003) (13)
Orientation of the crescent image of M 87* (2019) (13)
Simultaneous multi-wavelength campaign on PKS 2005-489 in a high state (2011) (13)
Very high energy γ -ray observations of the binary PSR B1259–63/SS2883 around the 2007 Periastron (2009) (13)
Launching of jets by cold, magnetized disks in Kerr Metric (2010) (13)
Application of the spine-layer jet radiation model to outbursts in the broad-line radio galaxy 3C 120 (2015) (13)
Powers and Magnetization of Blazar Jets (2016) (12)
The Compton Mirror in NGC 4151 (1996) (12)
Relativistic Jets in AGNs : proceedings of the International Conference, Cracow (Poland), 27-30 May 1997 (1997) (11)
Pair production instabilities as a source of X-ray flares from accreting black holes (1986) (11)
Soft gamma-ray production in active galactic nuclei (1985) (11)
Self-absorbed synchroton sources in active galactic nuclei (1989) (11)
On the Diversity of Jet Production Efficiency in Swift/BAT AGNs (2020) (10)
What Distinguishes the Host Galaxies of Radio-loud and Radio-quiet AGNs? (2017) (10)
Comparison of SEDs of very massive radio-loud and radio-quiet AGN (2019) (10)
SUZAKU OBSERVATIONS OF THE EXTREME MeV BLAZAR SWIFT J0746.3+2548 (2008) (9)
Detection of very-high-energy γ-ray emission from the vicinity of PSRB1706-44 and G343.1-2.3 with H.E.S.S. (2011) (8)
Hess upper limits on very high energy gamma-ray emission from the microquasar grs 1915+105 (2009) (8)
The effect of adiabatic losses on spectra of stationary jets and the origin of soft radio spectra of accreting black hole sources (2018) (7)
Covering factors of the dusty obscurers in radio-loud and radio-quiet quasars (2016) (7)
On Black Hole Spins and Dichotomy of Quasars (1997) (7)
Ultra-high-energy photons from active galactic nuclei - Theory (1989) (6)
On the significance of relativistically hot pairs in the jets of FR II radio galaxies (2020) (5)
16 M ar 2 01 1 Search for a Dark Matter annihilation signal from the Galactic Center halo with (2011) (5)
CTA contributions to the 33rd International Cosmic Ray Conference (ICRC2013) (2013) (5)
Jet Parameters in the Black Hole X-Ray Binary MAXI J1820+070 (2021) (5)
Radio-loudness of Active Galaxies and the Black Hole Evolution (2008) (5)
Radiation processes in blazars (1997) (4)
Hadronic jet models today (2010) (4)
QUASI-STAR JETS AS UNIDENTIFIED GAMMA-RAY SOURCES (2012) (4)
Bending relativistic jets in AGNs (1997) (3)
On Energetics and Structure of Sub-parsec Jets in Quasars (2001) (3)
The Composition and Power of the Jet of the Broad-line Radio Galaxy 3C 120 (2022) (3)
Pair-Matching of Radio-Loud and Radio-Quiet AGNs (2017) (3)
Simultaneous multiwavelength observations of the second exceptional γ -ray ﬂare of PKS 2155–304 in July 2006 (2009) (3)
Radio to γ-ray observations of 3C 454.3:1993–1995 (1997) (3)
Are Quasar Jets Matter Or Poynting Flux Dominated (2005) (2)
Recoil polarimetry with the Crystal Ball at MAMI (2009) (2)
On pair content of quasar jets (2002) (2)
Pair cascades triggered by relativistic protons in AGNs (1992) (2)
Study of the blazar AO 0235+164 during the multi-wavelength observation period from October 2008 to February 2009 (2013) (2)
Gamma-ray bursts from alternating-current jets (2003) (2)
On light propagation near a rotating black hole. II (1979) (2)
On Radiation Drag and Neutrons in GRBs (2002) (2)
Confrontation of the Magnetically Arrested Disc Scenario with Observations of FR II Sources (2017) (1)
Comptonization of external radiation in blazars (1993) (1)
Identifying Radio-active Galactic Nuclei among Radio-emitting Galaxies (2020) (1)
A simple analytical model of magnetic jets (2022) (1)
Neutrinos from hadronic cascades in active galactic nuclei (1992) (1)
ON ENERGETICS AND STRUCTURE OF SUB-PARSEC SCALE JETS IN QUASARS (2001) (1)
Collimation and polarization of radiation through scattering by jets (1989) (1)
The Case of the 300 kpc Long X-ray Jet in PKS 1127-145 at z=1.18 (2007) (1)
On magnetic fields in broad-line blazars (2006) (1)
Pressure imbalance of FRII radio source lobes: A role of energetic proton population (2001) (1)
Solving the mystery of the periodicity in the Seyfert galaxy NGC 6814 (1994) (1)
Jets in Quasars (2001) (1)
Modeling flares produced in blazars (2001) (1)
First minute-scale variability in Fermi-LAT blazar observations during the giant outburst of 3C279 in 2015 June (2017) (1)
A stability analysis of electron-positron pair equilibria of a two-temperature plasma cloud (1986) (1)
Consequences of Relativistic Proton Injection in Active Galactic Nuclei: Erratum (1991) (1)
The klein–nishina Effects in Blazar Jets (2005) (1)
Inflation of stars by TeV neutrinos (1991) (1)
Discovery of VHE γ –rays from the BL Lac object PKS 0548 − 322 (2012) (1)
On Multiwavelength Emission and Morphology of Large-Scale Quasar Jets (2005) (0)
A multiwavelength view of the ﬂaring state of PKS 2155-304 in 2006 (cid:2) (2012) (0)
Variable High Energy Emission of Blazars (1997) (0)
Variability, power, and pair content of AGN jets (1997) (0)
Propagation of relativistic jets through dense radiation fields in AGN. (1996) (0)
Searching for Pair Halos (2010) (0)
X-ray Observations of BL Lacertae During 1997 Outburst and its Association with Quasar-like Characteristics (1999) (0)
New limits on Quantum Gravity energy scale with PKS 2155-304 H.E.S.S. data using a likelihood fit (2010) (0)
Leakage of UHE photons from AGNs: Production of X-ray and γ-ray halos within 10–30 KPC (1988) (0)
Se p 20 02 ON RADIATION DRAG AND NEUTRONS IN GRBS (2002) (0)
Self-consistent jet models for black-hole binaries in the hard state and application to Cyg X-1 (2013) (0)
H.E.S.S. observation of the Vela X nebula (2009) (0)
01 01 38 0 v 1 2 2 Ja n 20 01 1 MODELING FLARES PRODUCED IN BLAZARS (2001) (0)
0 M ay 2 00 2 On the Nature of MeV-blazars (2002) (0)
Kiloparsec-Scale Jets in Nearby Galaxies as Possible Sources of High Energy gamma-ray Emission (2005) (0)
Polarization by Scattering off Relativistic Jets - - Application to Blazars (1988) (0)
VizieR Online Data Catalog: Radio-loud and radio-quiet quasars sample (Gupta+, 2016) (2017) (0)
Reconfinement shocks in relativistic AGN jets (2009) (0)
MAXI and GLAST Studies of Jets in Active Galaxies (2008) (0)
Erratum: "Modeling the Production of Flares in Gamma-Ray Quasars" (ApJ, 554, 1 [2001]) (2001) (0)
VHE gamma-rays From Extragalactic Large Scale Jets (2003) (0)
Dicovery of high energy gamma-ray emission from Centaurus with HESS (2009) (0)
Spectacular variability of gamma-ray emission in blazar 3C279 during the large outburst in June 2015 (2016) (0)
Interpreting the July 1997 Observations of BL Lacertae (1999) (0)
High Energy Emission in Blazars (1997) (0)
Simultaneous multi-wavelength 2005-489 in a (2018) (0)
Core shifts in blazar jets (2014) (0)
Implication of the discovery of the proper motion of the optical counterpart of GRB 970228 for the models of gamma-ray bursts (1997) (0)
Erratum: Comparison of SEDs of very massive radio-loud and radio-quiet AGN (2020) (0)
Non-linear shock acceleration and high energy gamma rays from clusters of galaxies (2005) (0)
AN EFFECTIVE HEMOGLOBIN CONTROL SYSTEM. (1964) (0)
Relativistic Shocks and Gamma-Ray Bursts (1997) (0)
The Dependence of the Fraction of Radio Luminous Quasars on Redshift and its Theoretical Implications (2021) (0)
Modeling the production of flares in γ-ray quasars (2001) (0)
N. Copernicus Astronomical Center (2001) (0)
Afterglow lightcurves from beamed outflows (2001) (0)
Electron injection break and pair content of quasar jets (1999) (0)
Magnetization of AGN jets as imposed by leptonic models of luminous blazars (2014) (0)
Learning about Jet Physics from Gamma-Ray Blazars (1997) (0)
VHE g-Rays from Extragalactic Large Scale Jets (2003) (0)
Multifrequency Spectra of 5 OVV Quasars (1997) (0)
Relativistic hadrons in cosmic compact objects : proceedings of a workshop held in Koninki/Suhora, Poland, 9-11 October 1990 (1991) (0)
High Energy Γ-rays from Fr I Jets (2003) (0)
A ug 2 00 0 Comptonization of Infrared Radiation from Hot Dust by Relativistic Jets in (2000) (0)
Se p 20 03 Gamma-ray bursts from alternating-current jets (2003) (0)
Observational constraints on stellar wind models of broad emission lines of AGNs (1992) (0)
Synergy Between Observations of AGN with GLAST and MAXI - Detecting X-ray Precursors of Gamma-ray Flares in Blazars (2001) (0)
Multiwavelength observations of the February 1996 high-energy flare in the blazar 3C 279 (1997) (0)
Results from four years of HESS observations of H 2356 − 309 (2010) (0)
On the Magnetic Field in Kpc-Scale Jets of FR I Radio Galaxies (2005) (0)
No Need for an Extreme Jet Energy in the Black Hole X-Ray Binary MAXI J1348–630 (2023) (0)
Relativistic shocks and gamma-ray burst afterglow lightcurves (1998) (0)
Can ultrarelativistic neutrons from the central engine drive the outflow in broad absorption line QSOS (1991) (0)
The H.E.S.S. measurement of the cosmic-ray electron spectrum (2010) (0)
Learning About Jets From Observations of Blazars (2002) (0)
Detection of very-high-energy γ-ray emission from the vicinity of PSR B 1706 − 44 and G 343 . 1 − 2 . 3 with H . (2021) (0)
Soft X-ray precursors of the non-thermal flares in blazars (2004) (0)
Radio Loudness of AGNs: Host Galaxy Morphology and the Spin Paradigm (2007) (0)
THE KLEIN-NISHINA EFFECTS IN BLAZAR JETS (2005) (0)

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Marek Sikora is affiliated with the following schools:

University of Warsaw

Marek Sikora 's Academic­Influence.com Rankings

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Marek Sikora 's Published Works

Published Works

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What Schools Are Affiliated With Marek Sikora ?

Marek Sikora 's AcademicInfluence.com Rankings