TeVCat Gamma-Ray Source Summary: Markarian 421

Canonical Name: Markarian 421

TeVCat Name: TeV J1104+382

Other Names: PG 1101+385
B3 1101+384
RBS 0939
RGB J1104+382
1ES 1101+384
1H 1104+382
H 1105+38
3FGL J1104.4+3812
2HWC J1104+381
1LHAASO J1104+3810
4HWC J1104+3810

Source Type: HBL

R.A.: 11 04 19 (hh mm ss)

Dec.: +38 11 41 (dd mm ss)

Gal Long: 179.88 (deg)

Gal Lat: 65.01 (deg)

Distance: z=0.031

Flux: 0.3 (Crab Units)

Energy Threshold: 500 GeV

Spectral Index: 2.2

Extended: No

Discovery Date: 1992-08

Discovered By: Whipple

TeVCat SubCat: Default Catalog

Source Notes:

Source position and its uncertainty:
From Albert et al. (2007):
- R.A. (J2000): 11 04 19
- Dec. (J2000): +38 11 41
- syst. uncertainty: 2'
- this is consistent with the source position provided by NED

The flux from Markarian 421 is highly variable.
From Ahnen et al. (2016):
Commenting on observations taken with MAGIC between March 2007 and
June 2009:
- "The flux above 400 GeV spans from the minimum nightly value of
1.3 +/- 0.4 10e-11 cm-2 s-1 to the maximum flux, that is about 24
times higher, at 3.1 +/- 0.1 10e-10 cm-2 s-1"

Spectral Index:
The spectral index has been found to vary.
From Albert et al. (2007):
- 2.20 +/- 0.08
- the spectrum shows evidence for an exponential cutoff (independent of EBL absorption)

Information on the jet:
From Lister et al. (2019):
- "All three innermost jet features of this nearby BL Lac object show
inward motion."

	Fourth HAWC Catalog (Alfaro et al., 2026):
	A selection of information for each of the 85 sources in the Fourth HAWC Catalog is provided in TeVCat. For full details, see Alfaro et al., 2026.
	All uncertainties are purely statistical and do not include the systematics.
	The pivot energy is fixed at 2 TeV and is the value that minimizes the correlation between the flux normalization and spectral index for a Crab-like source at 0 deg zenith.

	Name:	4HWC J1104+3810
	R.A. (J2000):	$166.15^{+0.004}_{-0.004}$
	Dec. (J2000):	$38.18^{+0.004}_{-0.004}$
	Extension (radius):	$0.09^{+0.005}_{-0.005}$
	Flux normalisation, N0, at E0 (2TeV):	$44.2^{+0.83}_{-0.81}$
	Spectral Index:	$-2.95^{+0.02}_{-0.02}$
	Beta:	$0.28^{+0.02}_{-0.02}$
	Test Statistic:	10782
	TeVCat Association (distance):	Markarian 421 (0.07)

Seen by: Whipple, HEGRA, CAT, H.E.S.S., MAGIC, Milagro, Telescope Array, CANGAROO, TACTIC, ARGO-YBJ, HAGAR, FACT, VERITAS, HAWC, LHAASO, SST-1M, LST-1

An Exceptional Very-High-Energy Gamma-Ray Flare From Mrk 421 Observed with VERITAS
Furniss, A. for the VERITAS Collaboration, The Astronomer's Telegram 17594 p1 (2026) [LINK]
SST-1M detection of increased very-high-energy gamma-ray activity of Mrk 421
Muthyala, S.R. for the SST-1M Collaboration, The Astronomer's Telegram 17597 p1 (2026) [LINK]
ASTRI-1 detection of enhanced very high-energy gamma-ray emission from Mrk 421 at TeV energies
Crestan, S. et al. for the ASTRI Project, The Astronomer's Telegram 17602 p1 (2026) [LINK]
Mrk 421: Upper limits from a neutrino search with IceCube
Franckowiak, A. et al., The Astronomer's Telegram 17622 p1 (2026) [LINK]
The January 2010 flare of Mrk421: Insights from a stochastic acceleration model
MAGIC collaboration et al., arXiv e-prints parXiv:2604.20480 (2026) [LINK]
Energy-Dependent Polarization Angle Variability as a Robust Diagnostic for Blazar Flaring Mechanisms
Zhang, Haocheng et al., arXiv e-prints parXiv:2604.26930 (2026) [LINK]
Constraining the Photon Intensity of Extragalactic Background Light with the HAWC Observatory for the Blazar Mrk 421
Alfaro, R. et al., arXiv e-prints parXiv:2605.23107 (2026) [LINK]
Joint Multi-Period Fermi-LAT and LHAASO Constraints on Axion-Like Particles from Mrk 421 Using Profile Likelihood with Gaussian Copula Correlation
Qin, Longhua et al., arXiv e-prints parXiv:2606.05738 (2026) [LINK]
The Fourth HAWC Catalog of Very-High-Energy Gamma-Ray Sources
Alfaro, R. et al., arXiv e-prints parXiv:2602.00263 (2026) [LINK]
Characterization of Markarian 421 during its most violent year: Multiwavelength variability and correlations
Abe, K. et al., arXiv e-prints parXiv:2501.03831 (2025) [LINK]
The polarization of the synchrotron radiation from a recollimated jet: application to high-energy BL Lacs
Sciaccaluga, Alberto et al., arXiv e-prints parXiv:2503.09180 (2025) [LINK]
Long-term Fermi observations of Mrk 421: clues for different non-stationary processes
Kapanadze, B. et al., Ap&SS 370 p17 (2025) [LINK]
Sub-Day Timescale X-ray Spectral Variability of the TeV Blazars Mrk 421 and 1ES 1959+650
Das, Susmita and Chatterjee, Ritaban, MNRAS p (2025) [LINK]
Multiwavelength correlation studies in the era of CTAO
Zacharias, Michael et al., arXiv e-prints parXiv:2504.20731 (2025) [LINK]
Time-Dependent Leptohadronic Modeling of Markarian 421
Xue, Rui et al., arXiv e-prints parXiv:2507.01265 (2025) [LINK]
Deterministic and Stochastic Study of the X-ray Emission from the TeV Blazar Mrk 421
Panis, Radim et al., arXiv e-prints parXiv:2506.21346 (2025) [LINK]
SST-1M Observations of Markarian 421
Muthyala, Srija Reddy et al., arXiv e-prints parXiv:2507.18445 (2025) [LINK]
Radiative signatures of electron-ion shocks in BL Lac type objects
Arbet-Engels, A. et al., arXiv e-prints parXiv:2508.18008 (2025) [LINK]
Unveiling blazar synchrotron emission: a multiwavelength polarimetric study of HSP and LSP populations
Capecchiacci, Sara et al., arXiv e-prints parXiv:2508.14168 (2025) [LINK]
Probing UHECR sources - Constraints from cosmic-ray measurements
Bister, Teresa, arXiv e-prints parXiv:2508.20767 (2025) [LINK]
Time-Dependent Modeling of the Sub-Hour Spectral Evolution During the 2013 Outburst of Mrk 421
MAGIC Collaboration et al., arXiv e-prints parXiv:2509.08686 (2025) [LINK]
Cosmic-ray cooling by dark matter in astrophysical jets
Kantzas, Dimitrios et al., arXiv e-prints parXiv:2509.18850 (2025) [LINK]
VHE gamma-ray observations of bright BL Lacs with the Large-Sized Telescope prototype (LST-1) of the CTAO
Abe, K. et al., MNRAS 544 p669-686 (2025) [LINK]
A Study of the Radio Spectrum of Mrk 421
Lee, Jee Won et al., ApJ 964 p176 (2024) [LINK]
Rapid variability of Markarian 421 during extreme flaring as seen through the eyes of XMM-Newton
Gokus, A. et al., MNRAS 529 p1450-1462 (2024) [LINK]
Broadband Multiwavelength Study of LHAASO-detected Active Galactic Nuclei
Wang, Ze-Rui et al., ApJS 271 p10 (2024) [LINK]
Simultaneous X-ray and optical polarization observations of the blazar Mrk 421
Bharathan, Athira M. et al., arXiv e-prints parXiv:2409.16745 (2024) [LINK]
Magnetic field properties inside the jet of Mrk 421. Multiwavelength polarimetry, including the Imaging X-ray Polarimetry Explorer
Kim, Dawoon E. et al., A&A 681 pA12 (2024) [LINK]
A Two-Week IXPE Monitoring Campaign on Mrk 421
Maksym, W. Peter et al., arXiv e-prints parXiv:2410.19983 (2024) [LINK]
Insights from the first flaring activity of a high-synchrotron-peaked blazar with X-ray polarization and VHE gamma rays
Abe, K. et al., arXiv e-prints parXiv:2410.23140 (2024) [LINK]
The First LHAASO Catalog of Gamma-Ray Sources
Cao, Zhen et al., ApJS 271 p25 (2024) [LINK]
Two-injection Scenario for the Hard X-Ray Excess Observed in Mrk 421
Hu, Wen et al., ApJ 948 p82 (2023) [LINK]
Discovery of X-ray polarization angle rotation in active galaxy Mrk 421
Di Gesu, Laura et al., arXiv e-prints parXiv:2305.13497 (2023) [LINK]
A QPO in Mkn 421 from Archival RXTE Data
Smith, Evan et al., arXiv e-prints parXiv:2305.07510 (2023) [LINK]
Flux and spectral variability of Mrk 421 during its moderate activity state using NuSTAR: Possible accretion disc contribution?
Mondal, Santanu et al., arXiv e-prints parXiv:2204.02132 (2022) [LINK]
Do radiative losses determine the characteristic emission of the blazar Mkn 421?
Baheeja, C. et al., arXiv e-prints parXiv:2206.00659 (2022) [LINK]
X-ray intraday variability of the TeV blazar Mrk 421 with XMM-Newton
Priyana Noel, A et al., arXiv e-prints parXiv:2206.02159 (2022) [LINK]
Rapid X-ray Variability in Mkn 421 during a Multiwavelength Campaign
Markowitz, Alex G. et al., arXiv e-prints parXiv:2206.03874 (2022) [LINK]
The X-ray Polarization View of Mrk 421 in an Average Flux State as Observed by the Imaging X-ray Polarimetry Explorer
Di Gesu, Laura et al., arXiv e-prints parXiv:2209.07184 (2022) [LINK]
Correlations between X-ray spectral parameters of Mkn 421 using long-term Swift-XRT data
Khatoon, Rukaiya et al., MNRAS 515 p3749-3759 (2022) [LINK]
Probing the Extragalactic Mid-infrared Background with HAWC
Albert, A. et al., ApJ 933 p223 (2022) [LINK]
Hadronuclear interactions in the jet of low TeV luminosity AGN: Implications for the low-state very-high-energy gamma-ray emission
Xue, Rui et al., arXiv e-prints parXiv:2210.09797 (2022) [LINK]
Optically thick, nonlocal, inhomogeneous, stationary jet model for high-energy radiation from blazars: Application to Mrk 421
Banasinski, Piotr and Bednarek, Wlodek, arXiv e-prints parXiv:2211.03762 (2022) [LINK]
Photohadronic Modelling of the 2010 Gamma-ray Flare from Mrk 421
Rosales de Leon, A. et al., arXiv e-prints parXiv:2101.01743 (2021) [LINK]
The relentless variability of Mrk 421 from the TeV to the radio
Arbet-Engels, Axel et al., arXiv e-prints parXiv:2101.10651 (2021) [LINK]
Short-Timescale Variability of the Blazar Mrk 421 from AstroSat and Simultaneous Multi-Wavelength Observations
Chatterjee, Ritaban et al., arXiv e-prints parXiv:2102.00919 (2021) [LINK]
Correlations between gamma-ray luminosity and magnetization of the jet as well as relativistic electron injection power:cases for Mrk 421, 3C 454.3 and 3C 279
Hu, Wen et al., arXiv e-prints parXiv:2102.07328 (2021) [LINK]
Extreme HBL-like behavior of Markarian 421 and its two-zone photohadronic interpretation
Sahu, Sarira et al., arXiv e-prints parXiv:2104.11999 (2021) [LINK]
Kinetic powers of the relativistic jets in Mrk 421 and Mrk 501
Deng, Xiao-Chun et al., MNRAS 504 p878-887 (2021) [LINK]
Connecting steady emission and Very High Energy flaring states in blazars: the case of Mrk 421
Dmytriiev, A. et al., arXiv e-prints parXiv:2105.12480 (2021) [LINK]
Long-term spectra of the blazars Mrk 421 and Mrk 501 at TeV energies seen by HAWC
Albert, A. et al., arXiv e-prints parXiv:2106.03946 (2021) [LINK]
Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017
MAGIC Collaboration et al., arXiv e-prints parXiv:2106.05516 (2021) [LINK]
Multi-wavelength study of Mrk 421 during a TeV flare
Gokus, A. et al., arXiv e-prints parXiv:2108.02085 (2021) [LINK]
Relentless multi-wavelength variability of Mrk 421 and Mrk 501
Sliusar, Vitalii et al., arXiv e-prints parXiv:2108.08130 (2021) [LINK]
GeV-radio correlation in Markarian 421
Sliusar, Vitalii et al., arXiv e-prints parXiv:2108.08126 (2021) [LINK]
Recent Results from VERITAS AGN Observations
Benbow, Wystan on behalf of the VERITAS Collaboration, arXiv e-prints parXiv:2108.05460 (2021) [LINK]
Confronting observations of VHE gamma-ray blazar flares with reconnection models
Jormanainen, J. et al., arXiv e-prints parXiv:2109.08529 (2021) [LINK]
X-ray spectra, light-curves and SEDs of blazars frequently observed by Swift
Giommi, Paolo et al., MNRAS p (2021) [LINK]
Understanding the X-ray spectral curvature of Mkn 421 using broadband AstroSat observations
Hota, Jyotishree et al., arXiv e-prints parXiv:2110.03344 (2021) [LINK]
An expanding one-zone model for studying blazars emission
Boula, Stella S. and Mastichiadis, Apostolos, arXiv e-prints parXiv:2110.05325 (2021) [LINK]
High-energy neutrinos from X-rays flares of blazars frequently observed by the Swift X-Ray Telescope
Stathopoulos, S.I. et al., arXiv e-prints parXiv:2111.09320 (2021) [LINK]
Detectability of large correlation length inflationary magnetic field with Cherenkov telescopes
Korochkin, Alexander et al., arXiv e-prints parXiv:2111.10311 (2021) [LINK]
Radio-gamma-ray response in blazars as signature of adiabatic blob expansion
Tramacere, Andrea et al., arXiv e-prints parXiv:2112.03941 (2021) [LINK]
Dual-high-frequency VLBI study of blazar-jet brightness-temperature gradients and collimation profiles
Burd, P.R. et al., arXiv e-prints parXiv:2112.04403 (2021) [LINK]
Relevance of VHE Blazar Spectra Models with Axion-Like Particles
Li, Hai-Jun, arXiv e-prints parXiv:2112.14145 (2021) [LINK]
Investigating Multiwavelength Lognormality with Simulations : Case of Mrk 421
Chakraborty, Nachiketa, arXiv e-prints parXiv:2001.02458 (2020) [LINK]
Unravelling the complex behavior of Mrk 421 with simultaneous X-ray and VHE observations during an extreme flaring activity in April 2013
MAGIC collaboration et al., arXiv e-prints parXiv:2001.08678 (2020) [LINK]
The Great Markarian 421 Flare of February 2010: Multiwavelength variability and correlation studies
Abeysekara, A.U. et al., arXiv e-prints parXiv:2002.03567 (2020) [LINK]
Gamma-ray Emission Properties of Four Bright Fermi-LAT AGNs: Implications on Emission Processes
Kushwaha, Pankaj et al., arXiv e-prints parXiv:2003.01339 (2020) [LINK]
Time dependent modeling of electron acceleration and cooling during blazar flares
Dmytriiev, A. et al., arXiv e-prints parXiv:2003.07663 (2020) [LINK]
Variations of the physical parameters of the blazar Mrk 421 based on the analysis of the spectral energy distributions
Yamada, Yurika et al., arXiv e-prints parXiv:2003.08016 (2020) [LINK]
Swift Observations of Mrk 421 in Selected Epochs. III. Extreme X-Ray Timing/Spectral Properties and Multiwavelength Lognormality during 2015 December-2018 April
Kapanadze, B. et al., ApJS 247 p27 (2020) [LINK]
Blazar variability power spectra from radio up to TeV photon energies: Mrk 421 and PKS 2155-304
Goyal, Arti, arXiv e-prints parXiv:2004.02765 (2020) [LINK]
Blazar Variability: A Study of Non-stationarity and the Flux-RMS Relation
Bhattacharyya, Souradip et al., arXiv e-prints parXiv:2005.05230 (2020) [LINK]
X-ray Flux and Spectral Variability of the TeV Blazars Mrk 421 and PKS 2155-304
Gupta, Alok C., arXiv e-prints parXiv:2009.02263 (2020) [LINK]
An Explanation for 13 consecutive days activities of Mrk 421
Zheng, Y.G. et al., arXiv e-prints parXiv:2009.06152 (2020) [LINK]
Establishing a particle distribution for multi-wavelength emission from BL Lac objects
Xie, X.X. et al., arXiv e-prints parXiv:2009.06153 (2020) [LINK]
Unfolding the X-ray Spectral Curvature of Mkn 421 for Further Clues
Goswami, Pranjupriya et al., MNRAS p (2020) [LINK]
An explanation about the flat radio spectrum for Mrk 421
Xue, Rui and Wang, Ze-Rui, arXiv e-prints parXiv:2011.06439 (2020) [LINK]
Fast magnetic reconnection structures in Poynting-flux dominated jets
Kadowaki, Luis H. S et al., arXiv e-prints parXiv:2011.03634 (2020) [LINK]
A time-dependent particle acceleration and emission model: understanding particle spectral evolution and blazar flares
Zheng, Y.G. et al., MNRAS 499 p1188-1199 (2020) [LINK]
Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and gamma-ray activity in 2015-2016
MAGIC Collaboration et al., arXiv e-prints parXiv:2012.01348 (2020) [LINK]
Limits on axion-like particles from Mrk 421 with 4.5-years period observations by ARGO-YBJ and Fermi-LAT
Li, Hai-Jun et al., arXiv e-prints parXiv:2008.09464 (2020) [LINK]
Leptonic and Hadronic Radiative Processes in Supermassive-Black-Hole Jets
Cerruti, Matteo, arXiv e-prints parXiv:2012.13302 (2020) [LINK]
Studies of extragalactic background light with TeV BL Lacertae objects
Longhua, Qin et al., MNRAS 499 p2662-2671 (2020) [LINK]
Reconcilement of VHE gamma-ray/X-ray correlation studies in Mrk 421 and break-down at high fluxes
Gonzalez, M.M. et al., arXiv e-prints p (2019) [LINK]
The Accretion Disk-Jet Connection in Blazars
Mukherjee, S. et al., MNRAS p (2019) [LINK]
Probing an X-ray flare pattern in Mrk 421 induced by multiple stationary shocks: a solution to the bulk Lorentz factor crisis
Hervet, O. et al., arXiv e-prints p (2019) [LINK]
Enhanced Activity of Mrk 421 for an extended period over 30 days measured by HAWC
Garcia-Gonzalez, J.A., Martinez, I. on behalf of the HAWC Collaboration, The Astronomer's Telegram 12683 p1 (2019) [LINK]
Prospects for Detecting X-ray Polarization in Blazar Jets
Liodakis, I. et al., arXiv e-prints parXiv:1906.01647 (2019) [LINK]
Optical polarization properties of February 2010 outburst of the blazar Mrk 421
Singh, K.K. et al., Ap&SS 364 p88 (2019) [LINK]
Time-dependent spectral modelling of Markarian 421 during a violent outburst in 2010
Banerjee, B. et al., MNRAS 487 p845-857 (2019) [LINK]
On the radiation energy density in the jet of high-energy emitting BL Lac objects and its impact on their multi-messenger role
Tavecchio, F. et al., arXiv e-prints parXiv:1906.02521 (2019) [LINK]
Multi-TeV flaring in nearby High Energy Blazars: A photohadronic scenario
Sahu, Sarira, arXiv e-prints parXiv:1907.01174 (2019) [LINK]
Spectral analysis of the blazars Markarian 421 and Markarian 501 with the HAWC Gamma-Ray Observatory
Coutino de Leon, S. et al., 36th International Cosmic Ray Conference (ICRC2019) 36 p654 (2019) [LINK]
Anisotropic electron populations in BL Lac jets: consequences for the observed emission
Tavecchio, F. and Sobacchi, E., arXiv e-prints parXiv:1908.02183 (2019) [LINK]
5.5 years multi-wavelength variability of Mrk 421: evidences of leptonic emission from the radio to TeV
Sliusar, Vitalii et al., arXiv e-prints parXiv:1909.13106 (2019) [LINK]
ANTARES search for high-energy neutrinos from TeV-emitting blazars, Markarian 421 and 501, in coincidence with HAWC gamma-ray flares
Organokov, Mukharbek and Pradier, Thierry, arXiv e-prints parXiv:1911.04963 (2019) [LINK]
Nature of gamma-ray variability in blazars
Bhatta, Gopal and Dhital, Niraj, arXiv e-prints parXiv:1911.08198 (2019) [LINK]
Study of long-term flux and photon Index distributions of blazars using RXTE observations
Khatoon, Rukaiya et al., arXiv e-prints parXiv:1910.14352 (2019) [LINK]
A survey of Active Galaxies with the HAWC Gamma-ray Observatory
Carraminana, Alberto et al., arXiv e-prints parXiv:1908.06831 (2019) [LINK]
X-Ray Intraday Variability of the TeV Blazar Mrk 421 with Suzaku
Zhang, Zhongli et al., ApJ 884 p125 (2019) [LINK]
Gamma-ray light curves for the BL Lac Mrk 421 using HAWC data derived with a new approach
Garcia-Gonzalez, J.A. et al., arXiv e-prints parXiv:1908.09452 (2019) [LINK]
FACT - Multi-wavelength analysis of more than 30 flares of Mrk 421
Sliusar, V. et al., 36th International Cosmic Ray Conference (ICRC2019) 36 p796 (2019) [LINK]
Multi-TeV flares from the nearest Blazar Markarian 421 and their origin
Sahu, S. et al., ArXiv e-prints p (2018) [LINK]
Exceptional Flare of Mrk 421 at TeV energies
Biland, A. et al., The Astronomer's Telegram 11184 p1 (2018) [LINK]
HAWC observation of Mrk421 reaching peak TeV flux in month-long enhanced activity
Garcia-Gonzalez, J.A. et al., The Astronomer's Telegram 11194 p1 (2018) [LINK]
Swift/BAT finds hard X-Ray flaring activity correlated with an ongoing TeV flare of Mrk421
Kadler, M. and Krimm, H., The Astronomer's Telegram 11195 p1 (2018) [LINK]
TACTIC detection of a strong TeV flare from Mrk 421
Rannot, R.C., The Astronomer's Telegram 11199 p1 (2018) [LINK]
Possible Accretion Disk Origin of the Emission Variability of a Blazar Jet
Chatterjee, R. et al., ArXiv e-prints p (2018) [LINK]
Blazar Spectra with Hard-sphere-like Acceleration of Electrons
Asano, K. and Hayashida, M., ArXiv e-prints p (2018) [LINK]
Multi-color optical monitoring of ten blazars from 2005 to 2011
Meng, N. et al., ArXiv e-prints p (2018) [LINK]
X-ray spectral variability of blazars using principal component analysis
Gallant, D. et al., ArXiv e-prints p (2018) [LINK]
The flux distribution of individual blazars as a key to understand the dynamics of particle acceleration
Sinha, A. et al., ArXiv e-prints p (2018) [LINK]
Influence of Energy-Dependent Particle Diffusion on the X-ray spectral curvature of MKN 421
Goswami, P. et al., ArXiv e-prints p (2018) [LINK]
X-ray intraday variability of the TeV blazar Mrk 421 with Chandra
Aggrawal, V. et al., MNRAS 480 p4873-4883 (2018) [LINK]
Statistical analysis on XMM-Newton X-ray flares of Mrk 421: distributions of peak flux and flaring time duration
Yan, D. et al., ArXiv e-prints p (2018) [LINK]
Study of short term enhanced TeV gamma-ray emission from Mrk 421 observed with TACTIC on December 28, 2014
Singh, K.K. et al., Astroparticle Physics 103 p122-130 (2018) [LINK]
Search for high-energy neutrino emission from Mrk 421 and Mrk 501 with the ANTARES neutrino telescope
Organokov, M. and Pradier, T., ArXiv e-prints p (2018) [LINK]
Systematic investigation of X-ray spectral variability of TeV blazars during flares in the RXTE era
Wang, Y. et al., ArXiv e-prints p (2018) [LINK]
Long-term optical monitoring of TeV emitting Blazars
Nilsson, K. et al., ArXiv e-prints p (2018) [LINK]
Probing the Jets of Blazars Using the Temporal Symmetry of Their Multi-Wavelength Outbursts
Roy, N. et al., ArXiv e-prints p (2018) [LINK]
Long-term optical monitoring of TeV emitting blazars. I. Data analysis
Nilsson, K. et al., A&A 620 pA185 (2018) [LINK]
Search for Magnetically Broadened Cascade Emission From Blazars with VERITAS
VERITAS Collaboration et al., ArXiv e-prints p (2017) [LINK]
Increased TeV gamma-ray activity from Mrk 421 on January 1-4
Wood, J., The Astronomer's Telegram 9936 p1 (2017) [LINK]
A time dependent approach to model X-ray and gamma-ray light curves of Mrk 421 observed during the flare in February 2010
Singh, K. et al., ArXiv e-prints p (2017) [LINK]
HAWC detection of further increase in TeV gamma-ray flux from Mrk 421
Martinez, I., The Astronomer's Telegram 9946 p1 (2017) [LINK]
Gamma-ray and Optical Oscillations of PKS 0716+71, MRK 421, and BL Lac
Sandrinelli, A. et al., ArXiv e-prints p (2017) [LINK]
Blazar Jets Perturbed by Magneto-Gravitational Stresses in Supermassive Binaries
Cavaliere, A. et al., ArXiv e-prints p (2017) [LINK]
Expected signatures from hadronic emission processes in the TeV spectra of BL Lac objects
Zech, A. et al., ArXiv e-prints p (2017) [LINK]
Daily monitoring of TeV gamma-ray emission from Mrk 421, Mrk 501, and the Crab Nebula with HAWC
Albert, A. et al., ArXiv e-prints p (2017) [LINK]
Black hole astrophysics with HAWC, the High Altitude Water Cherenkov gamma-ray observatory
Alberto Carraminana for the HAWC Collaboration, ArXiv e-prints p (2017) [LINK]
An Original Mechanism for the Acceleration of Ultra-High-Energy Cosmic Rays
Caprioli, D., ArXiv e-prints p (2017) [LINK]
X-ray Intraday Variability of Five TeV Blazars with NuSTAR
Pandey A. et al., ArXiv e-prints p (2017) [LINK]
On the origin of the hard X-Ray excess of high-synchrotron-peaked BL Lac object Mrk 421
Chen, L., ArXiv e-prints p (2017) [LINK]
Long-term optical polarization variability and multiwavelength analysis of Blazar Mrk 421
Fraija, N. et al., ArXiv e-prints p (2017) [LINK]
Highlights from the VERITAS AGN Observation Program
Benbow, W. and the VERITAS Collaboration, ArXiv e-prints p (2017) [LINK]
X-ray/gamma-ray flux correlations in the BL Lacs Mrk 421 and 501 using HAWC data
Garcia-Gonzalez, J.A. et al., ArXiv e-prints p (2017) [LINK]
Spectral analysis of Markarian 421 and Markarian 501 with HAWC
Coutino de Leon, S. et al., ArXiv e-prints p (2017) [LINK]
Dissecting the long-term emission behaviour of the BL Lac object Mrk 421
Carnerero, M.I. et al., ArXiv e-prints p (2017) [LINK]
The 2HWC HAWC Observatory Gamma-Ray Catalog
Abeysekara, A.U. et al., ApJ 843 p40 (2017) [LINK]
Gamma-ray Flux Distribution and Non-linear behavior of Four LAT Bright AGNs
Kushwaha, P. et al., ArXiv e-prints p (2017) [LINK]
Mrk 421 showing enhanced activity at TeV energies with two short bright outbursts
Biland, A. et al., The Astronomer's Telegram 11077 p1 (2017) [LINK]
Mrk 421 exceptionally bright at TeV energies
Biland, A., The Astronomer's Telegram 11086 p1 (2017) [LINK]
Tests of the Einstein Equivalence Principle using TeV Blazars
Wei, J. J. et al., ArXiv e-prints p (2016) [LINK]
Multi-band Variability Analysis of Mrk 421
Li, H.Z. et al., ArXiv e-prints p (2016) [LINK]
Particle diffusion and localized acceleration in inhomogeneous AGN jets - Part II: stochastic variation
Chen, X. et al., ArXiv e-prints p (2016) [LINK]
Time-dependent neutrino emission from Mrk 421 during flares and predictions for IceCube
Petropoulou, M. et al., ArXiv e-prints p (2016) [LINK]
Long-term study of Mkn 421 with the HAGAR Array of Telescopes
Sinha, A. et al., ArXiv e-prints p (2016) [LINK]
Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009
MAGIC Collaboration et al., ArXiv e-prints p (2016) [LINK]
Inverse Compton X-ray Emissions from TeV blazar Mrk421 during a Historical Low-Flux State Observed with NuSTAR
Kataoka, J. and Stawarz, L., ArXiv e-prints p (2016) [LINK]
Enhanced and increasing activity in gamma rays and X-rays from the HBL Mrk421
Biland, A., The Astronomer's Telegram 9137 p1 (2016) [LINK]
Testing one-zone synchrotron-self-Compton models with spectral energy distributions of Mrk 421
Zhu, Q. et al., ArXiv e-prints p (2016) [LINK]
First year results of the High Altitude Water Cherenkov observatory
Carraminana, A. and for the HAWC Collaboration, ArXiv e-prints p (2016) [LINK]
First Study of Combined Blazar Light Curves with FACT and HAWC
Dorner, D. et al., ArXiv e-prints p (2016) [LINK]
A search for spectral hysteresis and energy-dependent time lags from X-ray and TeV gamma-ray observations of Mrk 421
Abeysekara, A.U. et al., ArXiv e-prints p (2016) [LINK]
Parsec scale polarization properties of the TeV blazar Markarian 421
Lico, R. et al., ArXiv e-prints p (2015) [LINK]
Multi-TeV flaring from blazars: Markarian 421 a case study
Sahu, S. et al., ArXiv e-prints p (2015) [LINK]
Could the Wein fireball be associated to the ''orphan'' TeV flares ?
Fraija, N., ArXiv e-prints p (2015) [LINK]
A combined radio and GeV gamma-ray view of the 2012 and 2013 flares of Mrk 421
Hovatta, T. et al., ArXiv e-prints p (2015) [LINK]
The 2009 multiwavelength campaign on Mrk 421: Variability and correlation studies
MAGIC Collaboration et al., ArXiv e-prints p (2015) [LINK]
Synchrotron Self-Compton Emission by Relativistic Electrons under Stochastic Acceleration: Application to Mrk 421 and Mrk 501
Kakuwa, J. et al., ArXiv e-prints p (2015) [LINK]
An emergence of new polarized emission region in blazar Mrk 421 associated with X-ray flare
Itoh, R. et al., ArXiv e-prints p (2015) [LINK]
Gamma-ray light curve and VLBI polarization connection in Mrk 421
Giroletti, M. et al., ArXiv e-prints p (2015) [LINK]
Hadronic flares and associated neutrinos for Markarian 421
Marinelli, A. et al., 313 p177-178 (2015) [LINK]
Study of underlying particle spectrum during huge X-ray flare of Mkn 421 in April 2013
Sinha, A. et al., ArXiv e-prints p (2015) [LINK]
Discovery of a Wandering Radio Jet Base after a Large X-Ray Flare in the Blazar Markarian 421
Niinuma, K. et al., ApJ 807 pL14 (2015) [LINK]
VHE gamma-ray/X-ray correlation studies in Mrk 421 down to the quiescent state
Patricelli, B. et al., ArXiv e-prints p (2015) [LINK]
Violent Hard X-ray Variability of Mrk 421 Observed by NuSTAR in 2013 April
Paliya, V.S. et al., ArXiv e-prints p (2015) [LINK]
Flaring activity of Mrk 421 in 2012 and 2013: orphan flare and multiwavelength analysis
Fraija, N. et al., ArXiv e-prints p (2015) [LINK]
Search for TeV Gamma-Ray Emission from Point-like Sources in the Inner Galactic Plane with a Partial Configuration of the HAWC Observatory
Abeysekara, A.U. et al., ArXiv e-prints p (2015) [LINK]
Highlights from the High Altitude Water Cherenkov Observatory
Pretz, J. and for the HAWC Collaboration, ArXiv e-prints p (2015) [LINK]
Surveying the TeV sky with HAWC
Lauer, R.J. and for the HAWC collaboration, ArXiv e-prints p (2015) [LINK]
4.5-year simultaneous multi-wavelength observation of Mrk 421 in the ARGO-YBJ and Fermi overlap era
Chen, S. and Vernetto, S., ArXiv e-prints p (2015) [LINK]
4.5 years multi-wavelength observations of Mrk 421 during the ARGO-YBJ and Fermi common operation time
Bartoli, B. et al., ArXiv e-prints p (2015) [LINK]
Lower Bound on the Cosmic TeV Gamma-ray Background Radiation
Inoue, Y. and Tanaka, Y.T., ArXiv e-prints p (2015) [LINK]
Multiwavelength Study of Quiescent States of Mrk 421 with Unprecedented Hard X-Ray Coverage Provided by NuSTAR in 2013
Balokovic, M. et al., ArXiv e-prints p (2015) [LINK]
Monitoring TeV blazars with HAWC
Lauer, R.J. et al., ArXiv e-prints p (2015) [LINK]
MAXI investigation into the longterm X-ray variability from the very-high-energy gamma-ray blazar Mrk 421
Isobe, N. et al., ArXiv e-prints p (2014) [LINK]
Estimation of the TeV gamma-ray duty cycle of Mrk 421 with the Milagro observatory
Patricelli, B. et al., ArXiv e-prints p (2014) [LINK]
The Study of TeV Variability and Duty Cycle of Mrk 421 from 3 Years of Observations with the Milagro Observatory
Abdo, A.A. et al., ArXiv e-prints p (2014) [LINK]
Estimation of the TeV gamma-ray duty cycle of Mrk 421 with Milagro
Patricelli, B. et al., ArXiv e-prints p (2014) [LINK]
Study of TeV variability of Mrk 421 from 3 years of monitoring with the Milagro Observatory
Patricelli, B. et al., ArXiv e-prints p (2014) [LINK]
Very Long Baseline polarimetry and the gamma-ray connection in Markarian 421 during the broadband campaign in 2011
Lico, R. et al., ArXiv e-prints p (2014) [LINK]
Validation of a new background discrimination method for the TACTIC TeV Gamma-ray telescope with Markarian 421 data
Sharma, M. et al., ArXiv e-prints p (2014) [LINK]
TeV gamma-ray fluxes from the longer campaigns on Mrk421 as constraints on the emission of TeV-PeV Neutrinos and UHECRs
Fraija, N. and Marinelli, A., ArXiv e-prints p (2014) [LINK]
Unprecedented study of the broadband emission of Mrk 421 during flaring activity in March 2010
The MAGIC Collaboration et al., ArXiv e-prints p (2014) [LINK]
X-ray and gamma-ray variability of Mrk 421
Zheng, Y.G. et al., MNRAS 442 p3166-3178 (2014) [LINK]
Emitting electrons spectra and acceleration processes in the jet of Mrk 421: from low state to giant flare state
Yan, D. et al., ArXiv e-prints p (2013) [LINK]
The Stability of BVRI Comparison Stars Near Selected TeV Blazars
Pace, C.J. et al., ArXiv e-prints p (2013) [LINK]
Mrk 421 as a case study for TeV and X-ray variability in leptohadronic models
Mastichiadis, A. et al., ArXiv e-prints p (2013) [LINK]
MAGIC and VERITAS detect an unprecedented flaring activity from Mrk 421 in very high energy gamma-rays
Cortina, J. et al., The Astronomer's Telegram 4976 p1 (2013) [LINK]
Fermi-LAT and Swift-XRT observe exceptionally high activity from the nearby TeV blazar Mrk421
Paneque, D. et al., The Astronomer's Telegram 4977 p1 (2013) [LINK]
MAXI observation of a bright X-ray flare with multiple peaks from Mrk 421
Negoro, H. on behalf of the MAXI team, The Astronomer's Telegram 4978 p1 (2013) [LINK]
An active state of the BL Lac Object Markarian 421 detected by INTEGRAL in April 2013
Pian, E. et al., ArXiv e-prints p (2013) [LINK]
Particle Acceleration And Emission Processes In Mrk 421
Cao, G. and Wang, J., ArXiv e-prints p (2013) [LINK]
First Results from NuSTAR Observations of Mkn 421
Balokovic, M. et al., ArXiv e-prints p (2013) [LINK]
NuSTAR detects extreme X-ray flaring of Mrk 421
Balokovic, M. et al., The Astronomer's Telegram 4974 p1 (2013) [LINK]
An Exceptional Radio Flare in Markarian 421
Richards, J.L. et al., ArXiv e-prints p (2013) [LINK]
The TeV blazar Markarian 421 at the highest spatial resolution
Blasi, M.G. et al., ArXiv e-prints p (2013) [LINK]
Self-consistent neutrino and UHE cosmic ray spectra from Mrk 421
Dimitrakoudis, S. et al., ArXiv e-prints p (2013) [LINK]
Observation of Markarian 421 in TeV gamma rays over a 14-year time span
Acciari, V.A. et al., ArXiv e-prints p (2013) [LINK]
TeV gamma-ray survey of the Northern sky using the ARGO-YBJ detector
The ARGO-YBJ Collaboration et al., ArXiv e-prints p (2013) [LINK]
TeV Gamma-ray Observations of Markarian 421 using TACTIC during 2009-10
Chandra et al., ArXiv e-prints p (2012) [LINK]
Multiwavelength study of TeV Blazar Mrk421 during giant flare
Shukla, A. et al., ArXiv e-prints p (2012) [LINK]
The H.E.S.S. extragalactic sky
Raue, M. and for the H.E.S.S. collaboration, ArXiv e-prints p (2012) [LINK]
VLBA monitoring of Mrk 421 at 15 and 24 GHz during 2011
Lico, R. et al., ArXiv e-prints p (2012) [LINK]
Possible Detection of Apparent Superluminal Inward Motion in Markarian 421 after the Giant X-Ray Flare in 2010 February
Niinuma, K. et al., ApJ 759 p84 (2012) [LINK]
Mrk 421 active state in 2008: the MAGIC view, simultaneous multi-wavelength observations and SSC model constrained
Aleksic, J. et al., A&A 542 pA100 (2012) [LINK]
Broad Ly alpha Emission from Three Nearby BL Lacertae Objects
Stocke, J.T. et al., ArXiv e-prints p (2011) [LINK]
The environment and distribution of emitting electrons as a function of source activity in Markarian 421
Mankuzhiyil, N. et al., ArXiv e-prints p (2011) [LINK]
On the emission lines in active galactic nuclei with relativistic jets
Foschini, L., ArXiv e-prints p (2011) [LINK]
TeV Gamma-Ray Observations of Mrk421 and H1426+428 with TACTIC Imaging Telescope
Yadav, K., ArXiv e-prints p (2011) [LINK]
Multifrequency Variability and Correlations from Extensive Observing Campaigns of Mkn 421 and Mkn 501 in 2009
Barres de Almeida, U. et al., ArXiv e-prints p (2011) [LINK]
VERITAS observation of Markarian 421 flaring activity
Galante, N. and for the VERITAS Collaboration, ArXiv e-prints p (2011) [LINK]
Monitoring of bright, nearby Active Galactic Nuclei with the MAGIC telescopes
Wagner, R. et al., ArXiv e-prints p (2011) [LINK]
Highlights of the VERITAS Blazar Observation Program
Wystan Benbow for the VERITAS Collaboration, ArXiv e-prints p (2011) [LINK]
TeV gamma-ray survey of the northern sky using the ARGO-YBJ experiment
Cao, Z. et al., ArXiv e-prints p (2011) [LINK]
Orbit Mode observations of Crab and Mrk 421
Kieda, D.B. and the VERITAS Collaboration, ArXiv e-prints p (2011) [LINK]
Multiwavelength study of TeV Blazar Mrk421 during giant flare and observations of TeV AGNs with HAGAR
Shukla, A. et al., ArXiv e-prints p (2011) [LINK]
Environment and properties of emitting electrons in blazar jets: Mrk 421 as a laboratory
Mankuzhiyil, N. et al., ArXiv e-prints p (2011) [LINK]
Multiwavelength Variability of the Blazars Mrk 421 and 3C 454.3 in the High-State
Gaur, H. et al., ArXiv e-prints p (2011) [LINK]
Long-term Monitoring of the TeV Emission from Mrk 421 with the ARGO-YBJ Experiment
Bartoli, B. et al., ApJ 734 p110 (2011) [LINK]
Fermi Large Area Telescope Observations of Markarian 421: The Missing Piece of its Spectral Energy Distribution
Abdo, A.A. et al., ApJ 736 p131 (2011) [LINK]
TeV and Multi-wavelength Observations of Mrk 421 in 2006-2008
Acciari, V.A. et al., ApJ 738 p25 (2011) [LINK]
A Novel Approach in Constraining Electron Spectra in Blazar Jets: The Case of Markarian 421
Ushio, M. et al., ApJ 724 p1509-1516 (2010) [LINK]
VERITAS Reports Markarian 421 in a High Flaring State
Ong, R.A., The Astronomer's Telegram 2443 p1-+ (2010) [LINK]
The Large Flares of Mrk 421 in 2006: signature of electron acceleration and energetic budget of the jet
Tramacere, A., ArXiv e-prints p (2010) [LINK]
Gamma-ray flares from Mrk421 in 2008 observed with the ARGO-YBJ experiment .
Di Sciascio, G. and ARGO-YBJ Collaboration, Mem. Soc. Astron. Italiana 81 p326-+ (2010) [LINK]
On the correlation between the X-ray and gamma-ray emission in TeV blazars
Katarzynski, K. and Walczewska, K., A&A 510 pA63+ (2010) [LINK]
Long-term lightcurves from combined unified very high energy gamma-ray data
Tluczykont, M. et al., A&A 524 pA48+ (2010) [LINK]
A Suzaku X-ray Study of the Particle Acceleration Processes in the Relativistic Jet of Blazar Mrk 421
Garson, III, A.B. et al., ApJ 722 p358-366 (2010) [LINK]
Search for an extended VHE gamma-ray emission from Mrk 421 and Mrk 501 with the MAGIC Telescope
Aleksic, J. et al., A&A 524 pA77+ (2010) [LINK]
Discovery of a high confidence soft lag from an X-ray flare of Markarian 421
Zhang, Y. et al., Science in China G: Physics and Astronomy 53 p224-227 (2010) [LINK]
Gamma-ray Flares from Mrk421 in 2008 Observed with the ARGO-YBJ Detector
Aielli, G. et al., ApJ 714 pL208-L212 (2010) [LINK]
MAGIC TeV gamma-ray observations of Markarian 421 during multiwavelength campaigns in 2006
Aleksic, J. et al., A&A 519 pA32+ (2010) [LINK]
The Jets of TeV Blazars at Higher Resolution: 43 GHz and Polarimetric VLBA Observations from 2005 to 2009
Piner, B.G. et al., ApJ 723 p1150-1167 (2010) [LINK]
Multiwavelength Observations of Markarian 421 in 2005-2006
Horan, D. et al., ApJ 695 p596-618 (2009) [LINK]
The June 2008 flare of Markarian 421 from optical to TeV energies
Wagner, R.M. et al., ArXiv e-prints p (2009) [LINK]
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
Tramacere, A. et al., A&A 501 p879-898 (2009) [LINK]
Implications of Bulk Velocity Structures in AGN Jets
Yang, J. et al., PASJ 61 p1153- (2009) [LINK]
Simultaneous Multiwavelength Observations of Markarian 421 During Outburst
Acciari, V.A. et al., ApJ 703 p169-178 (2009) [LINK]
Multiwavelength Observations of Markarian 421 in 2001 March: An Unprecedented View on the X-Ray/TeV Correlated Variability
Fossati, G. et al., ApJ 677 p906-925 (2008) [LINK]
TACTIC observations of Mrk 421 at TeV energies during December 2005 to April 2006.
Yadav, K.K. et al., Bulletin of the Astronomical Society of India 25 p68-+ (2008) [LINK]
Systematic Search for VHE Gamma-Ray Emission from X-Ray-bright High-Frequency BL Lac Objects
Albert, J. et al., ApJ 681 p944-953 (2008) [LINK]
Observations of Markarian 421 with the MAGIC Telescope
Albert, J. et al., ApJ 663 p125-138 (2007) [LINK]
Observations of TeV Gamma-rays from Mrk 421 during December 2005 to April 2006 with the TACTIC telescope
Yadav, K.K. et al., Astroparticle Physics 27 p447-454 (2007) [LINK]
Unveiling the X-ray/TeV engine in Mkn 421
Giebels, B. et al., A&A 462 p29-41 (2007) [LINK]
A Multiwavelength View of the TeV Blazar Markarian 421: Correlated Variability, Flaring, and Spectral Evolution
Blazejowski, M. et al., ApJ 630 p130-141 (2005) [LINK]
Observations of Very-High-Energy Gamma Rays from Mrk421 at the Crimean Astrophysical Observatory in 2002
Fidelis, V.V., Astronomy Reports 49 p1-4 (2005) [LINK]
On the Very-High-Energy Gamma-Ray Flux from the Galaxy Mrk 421 in 2004
Fidelis, V.V. et al., Astronomy Letters 31 p575-578 (2005) [LINK]
Study of TeV photons from Mrk 421 with the TACTIC gamma-ray telescope: 2004 observations.
Rannot, R.C. et al., Bulletin of the Astronomical Society of India 33 p403-403 (2005) [LINK]
Observations of Mkn 421 in 2004 with HESS at large zenith angles
Aharonian, F. et al., A&A 437 p95-99 (2005) [LINK]
Evolution of the Synchrotron Spectrum in Markarian 421 during the 1998 Campaign
Tanihata, C. et al., ApJ 601 p759-770 (2004) [LINK]
Multi-TeV Gamma-Ray Flares from Markarian 421 in 2000 and 2001 Observed with the Tibet Air Shower Array
Amenomori, M. et al., ApJ 598 p242-249 (2003) [LINK]
Variations of the TeV energy spectrum at different flux levels of Mkn 421 observed with the HEGRA system of Cherenkov telescopes
Aharonian, F. et al., A&A 393 p89-99 (2002) [LINK]
Discovery of Spectral Variability of Markarian 421 at TeV Energies
Krennrich, F. et al., ApJ 575 pL9-L13 (2002) [LINK]
Observation of Gamma Rays Greater than 10 TeV from Markarian 421
Okumura, K. et al., ApJ 579 pL9-L12 (2002) [LINK]
STACEE Observations of Markarian 421 during an Extended Gamma-Ray Outburst
Boone, L.M. et al., ApJ 579 pL5-L8 (2002) [LINK]
Recent results on crab nebula and Mkn-421 observations with TACTIC imaging element
Bhatt, N. et al., Bulletin of the Astronomical Society of India 30 p385-388 (2002) [LINK]
VHE galla-ray spectral properties of the blazars Mrk 501 and Mrk 421 from CAT observations in 1997 and 1998
Piron, Frederic and CAT Collaboration, 515 p113-118 (2000) [LINK]
Measurement of the Multi-TEV Gamma-Ray Flare Spectra of Markarian 421 and Markarian 501
Krennrich, F. et al., ApJ 511 p149-156 (1999) [LINK]
Observations of MKN 421 during 1997 and 1998 in the energy range above 500 GeV with the HEGRA stereoscopic Cherenkov telescope system
Aharonian, F.A. et al., A&A 350 p757-764 (1999) [LINK]
The TeV Gamma-Ray Spectrum of Markarian 421 during an Intense Flare
Zweerink, J.A. et al., ApJ 490 pL141+ (1997) [LINK]
Detection of VHE gamma-rays from MKN 421 with the HEGRA Cherenkov Telescopes.
Petry, D. et al., A&A 311 pL13-L16 (1996) [LINK]
Very High Energy Gamma-Ray Emission from the Blazar Markarian 421
Schubnell, M.S. et al., ApJ 460 p644-+ (1996) [LINK]
Very Rapid and Energetic Bursts of TeV Photons from the Active Galaxy Markarian 421.
Gaidos, J.A. et al., Nature 383 p319-+ (1996) [LINK]
Gamma-Ray Variability of the BL Lacertae Object Markarian 421
Buckley, J.H. et al., ApJ 472 pL9+ (1996) [LINK]
Detection of TeV photons from the active galaxy Markarian 421
Punch, M. et al., Nature 358 p477-+ (1992) [LINK]

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Canonical Name:	Markarian 421
TeVCat Name:	TeV J1104+382
Other Names:	PG 1101+385 B3 1101+384 RBS 0939 RGB J1104+382 1ES 1101+384 1H 1104+382 H 1105+38 3FGL J1104.4+3812 2HWC J1104+381 1LHAASO J1104+3810 4HWC J1104+3810
Source Type:	HBL
R.A.:	11 04 19 (hh mm ss)
Dec.:	+38 11 41 (dd mm ss)
Gal Long:	179.88 (deg)
Gal Lat:	65.01 (deg)
Distance:	z=0.031
Flux:	0.3 (Crab Units)
Energy Threshold:	500 GeV
Spectral Index:	2.2
Extended:	No
Discovery Date:	1992-08
Discovered By:	Whipple
TeVCat SubCat:	Default Catalog

Observation Date (UT)	Observation Lat