In-flight calibration of the Wide-field X-ray Telescope on board the Einstein Probe

arXiv:2606.28101 · astro-ph.IM, astro-ph.HE, hep-ex, physics.ins-det · Submitted 2026-06-26 · Read on arXiv

Huaqing Cheng, Hai-Wu Pan, Yuan Liu, Jingwei Hu, Haonan Yang, Donghua Zhao, Zhixing Ling, Yifan Chen, Xiaojin Sun, Longhui Li, Ge Jin, Wenxin Wang, Xue Yang, He-Yang Liu, Chen Zhang, Shuang-Nan Zhang, Weimin Yuan

astro-ph.IM, astro-ph.HE, hep-ex, physics.ins-det

Submitted: 2026-06-26

Comments: 13 pages, 13 figures, 3 tables. Submitted to Astronomy & Astrophysics

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Calibration — 103× in this paper · explained in 7 episodes
• Einstein Probe — 12× in this paper
• Wide-field X-ray Telescope — 12× in this paper
• Accuracy — 9× in this paper · explained in 1 episode
• Chinese Academy of Sciences — 5× in this paper
• Society of Photo-Optical Instrumentation Engineers — 5× in this paper
• Complementary Metal-Oxide Semiconductor — 3× in this paper
• Abundance — 2× in this paper · explained in 1 episode
• European Space Agency — 2× in this paper
• AGN — 1× in this paper · explained in 1 episode
• Benchmark — 1× in this paper · explained in 2 episodes
• Verification — 1× in this paper · explained in 2 episodes

Sources

• An energetic dirty fireball detected in soft X-rays
• Discovery of EP J175257.3-351923 as a Candidate Black Hole Low-Mass X-ray Binary
• EP240801a/XRF 240801B: An X-ray Flash Detected by the Einstein Probe and Implications of its Multiband Afterglow
• An Intermediate-mass Black Hole Lurking in A Galactic Halo Caught Alive during Outburst
• An extremely soft and weak fast X-ray transient associated with a luminous supernova
• The Curious Case of PHL 1811: Heavy Obscuration Versus Intrinsic X-ray Weakness
• EP241021a: a months-duration X-ray transient with luminous optical and radio emission
• EP250827b/SN 2025wkm: An X-ray Flash-Supernova Powered by a Central Engine and Circumstellar Interaction
• A fast X-ray transient from a weak relativistic jet associated with a type Ic-BL supernova
• Einstein Probe discovery of EP J171159.4-333253: an eclipsing neutron star low-mass X-ray binary with clocked bursts
• Spectral Hardening Reveals Afterglow Emergence in Long-Duration Fast X-ray Transients: A Case Study of GRB 250404A/EP250404a
• X-rays breaking out of pre-explosion ejecta mark a supernova's first light

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