Image Details
Caption: Figure 1.
Historical light curves of BL Lac between 2005 and 2024. From top to bottom: γ-ray photon flux between 0.1 GeV and 100 GeV (flux points with black open markers and upper limits with gray markers), X-ray flux between 0.3 and 10 keV, optical R-band flux density, optical R-band polarization degree (%), radio 1 mm flux density, and radio 1 mm polarization degree. Blue vertical lines indicate the previous and current IXPE observations of BL Lac. A description of the origin of the data in this figure is provided in the Appendix.
© 2025. The Author(s). Published by the American Astronomical Society.