Speaker
Huicai Li
(IHEP)
Description
High-frequency BL Lacertae objects (HBLs) are defined by a synchrotron peak of their broadband spectral energy distribution (SED) at a frequency of νₛ ≥ 10¹⁵ Hz. The BL Lac object 1ES 1218+304, at a redshift of z = 0.182, is a well-recognized HBL and is known to exhibit significant variability. Monitoring observations of 1ES 1218+304 with the LHAASO, conducted from March 2021 to July 2025, have provided comprehensive coverage of one flare event. The total statistical significance of the source detection during this flare reaches 7.0 σ. In this work, we present the corresponding multi-wavelength light curves and very high-energy (VHE) spectra of 1ES 1218+304 in its flaring state.
Primary authors
Huicai Li
(IHEP)
Liang Chen
Min Zha
