Latest Images

Daily light curves from the Mrk 421 direction i...

Daily light curves from the Mrk 421 direction in different energy bands from 2021 March ...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Left panel: multi-instrument fractional variabi...

Left panel: multi-instrument fractional variability Fvar as a function of the energy ove...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

The DCF of the LHAASO-WCDA light curve, correla...

The DCF of the LHAASO-WCDA light curve, correlated with the Swift-XRT, MAXI-GSC, and Fer...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Histograms of the daily signal events Ns from M...

Histograms of the daily signal events Ns from Mrk 421. The left and right panels present...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

VHE spectrum of Mrk 421. Black circles correspo...

VHE spectrum of Mrk 421. Black circles correspond to data from LHAASO (2021–2024) and th...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Temporal evolution of the ECPL model parameters...

Temporal evolution of the ECPL model parameters, showing from left to right the normaliz...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

The energy spectrum measurement results of LHAA...

The energy spectrum measurement results of LHAASO for Mrk 421. The left figure is the ob...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Histograms of the MWL fluxes are shown, with (a...

Histograms of the MWL fluxes are shown, with (a) to (f) representing the distribution an...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

The left panel shows the significance sky map o...

The left panel shows the significance sky map of Mrk 421 observed by WCDA from 2021 Marc...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

The detailed 23 outbursts’ light curves from LH...

The detailed 23 outbursts’ light curves from LHASO-WCDA. Panels (a)–(c) show Group A wit...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Energy spectra of Mrk 421 during the 23 outburs...

Energy spectra of Mrk 421 during the 23 outbursts; simultaneous SEDs from Fermi-LAT are ...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Energy spectra of Mrk 421 during the 23 outburs...

Energy spectra of Mrk 421 during the 23 outbursts; simultaneous SEDs from Fermi-LAT are ...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Left panel: WCDA VHE gamma-ray flux vs. Maxi X-...

Left panel: WCDA VHE gamma-ray flux vs. Maxi X-ray flux. The blue line is the flux relat...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Left panel: relationship between the intrinsic ...

Left panel: relationship between the intrinsic spectral index and the 1 TeV flux for the...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

The long-term SED of Mrk 421 in the HE to VHE r...

The long-term SED of Mrk 421 in the HE to VHE range, measured by LHAASO and Fermi-LAT, a...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Temporal distribution of the flux and spectral ...

Temporal distribution of the flux and spectral index during the 3 yr observation period....

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Histograms of the rise (Tr (days)) and decay (T...

Histograms of the rise (Tr (days)) and decay (Td (days)) timescales during outburst peri...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

Different intrinsic SEDs in the year of 2023 (h...

Different intrinsic SEDs in the year of 2023 (high state) derived from various EBL models.

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

The best-fitting SEDs based on the one-zone SSC...

The best-fitting SEDs based on the one-zone SSC model. Simultaneous MWL observations are...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

The best-fitting SEDs based on the one-zone SSC...

The best-fitting SEDs based on the one-zone SSC model. Simultaneous MWL observations are...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

The correlation between fitting parameters of t...

The correlation between fitting parameters of the one-zone SSC model. Left panel: the bl...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

The MWL light curves of the 23 outburst episode...

The MWL light curves of the 23 outburst episodes are constructed using data from LHAASO,...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

The χ2/dof distributions of the gamma-ray energ...

The χ2/dof distributions of the gamma-ray energy spectra fitted with three models during...

Zhen Cao et al, The Astrophysical Journal Supplement Series 285 2

An illustration of modeling the zg-band light c...

An illustration of modeling the zg-band light curve of J1139.0-2323 using the damped ran...

Yongyun Chen et al, The Astrophysical Journal Supplement Series 285 2

The distributions of damping timescales and var...

The distributions of damping timescales and variability amplitudes for radio-quiet AGNs ...

Yongyun Chen et al, The Astrophysical Journal Supplement Series 285 2

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