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Science objectives of the Einstein Probe mission

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arxiv 2501.07362 v1 pith:5YT246P4 submitted 2025-01-13 astro-ph.HE

Science objectives of the Einstein Probe mission

classification astro-ph.HE
keywords x-raytransientswillastronomyeinsteinexpectedmissionoutbursts
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The Einstein Probe (EP) is an interdisciplinary mission of time-domain and X-ray astronomy. Equipped with a wide-field lobster-eye X-ray focusing imager, EP will discover cosmic X-ray transients and monitor the X-ray variability of known sources in 0.5-4 keV, at a combination of detecting sensitivity and cadence that is not accessible to the previous and current wide-field monitoring missions. EP can perform quick characterisation of transients or outbursts with a Wolter-I X-ray telescope onboard. In this paper, the science objectives of the Einstein Probe mission are presented. EP is expected to enlarge the sample of previously known or predicted but rare types of transients with a wide range of timescales. Among them, fast extragalactic transients will be surveyed systematically in soft X-rays, which include {\gamma}-ray bursts and their variants, supernova shock breakouts, and the predicted X-ray transients associated with binary neutron star mergers. EP will detect X-ray tidal disruption events and outbursts from active galactic nuclei, possibly at an early phase of the flares for some. EP will monitor the variability and outbursts of X-rays from white dwarfs, neutron stars and black holes in our and neighbouring galaxies at flux levels fainter than those detectable by the current instruments, and is expected to discover new objects. A large sample of stellar X-ray flares will also be detected and characterised. In the era of multi-messenger astronomy, EP has the potential of detecting the possible X-ray counterparts of gravitational wave events, neutrino sources, and ultra-high energy {\gamma}-ray and cosmic ray sources. EP is expected to help advance the studies of extreme objects/phenomena and their underlying physical processes revealed in the dynamic X-ray universe, as well as studies in other areas of X-ray astronomy.

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Cited by 15 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. AT2019ijn: a fast-rising, slow-decaying blue optical transient with exceptionally bright radio emission

    astro-ph.HE 2026-07 conditional novelty 7.0

    AT2019ijn combines LFBOT-like fast optical rise and blue color with slow decay and radio luminosity peaking late at 2e31 erg/s/Hz, best fit as an off-axis jetted IMBH TDE.

  2. Low-hard to high-soft spectral state transitions in the faintest early-X-ray-detected optical tidal disruption event TDE 2025aarm

    astro-ph.HE 2026-07 conditional novelty 7.0

    TDE 2025aarm is the faintest early-X-ray-detected optical TDE and the first thermal TDE reported to show a low-hard to high-soft X-ray state transition resembling black-hole X-ray binaries.

  3. X-rays breaking out of pre-explosion ejecta mark a supernova's first light

    astro-ph.HE 2026-06 conditional novelty 7.0

    EP260321a is a thermal soft X-ray shock breakout from a ~300 R_⊙ CSM shell around a stripped-envelope progenitor, followed by SN Ic-BL 2026gzf.

  4. EP260321a/SN 2026gzf: The Faintest Shock Breakout Associated with a Broad-Lined Supernova

    astro-ph.HE 2026-06 unverdicted novelty 7.0

    EP260321a is the faintest observed shock breakout tied to a broad-lined Type Ic supernova, interpreted as a choked weak outflow from a stripped star.

  5. Low-hard to high-soft spectral state transitions in the faintest early-X-ray-detected optical tidal disruption event TDE 2025aarm

    astro-ph.HE 2026-07 unverdicted novelty 6.0

    TDE 2025aarm exhibits the first reported low-hard to high-soft X-ray state transition in a thermal tidal disruption event, at the faintest early X-ray luminosity yet measured.

  6. X-rays breaking out of pre-explosion ejecta mark a supernova's first light

    astro-ph.HE 2026-06 unverdicted novelty 6.0

    Detection of a thermal X-ray shock-breakout event from pre-explosion ejecta of a stripped massive star, indicating abrupt mass loss within a month of core collapse.

  7. Prospect for Detection of Strongly Lensed Multi-messenger Signals of Binary Neutron Star Mergers

    astro-ph.HE 2026-07 conditional novelty 5.0

    Future CE+ET detectors may detect lensed BNS kilonovae at ~0.5/yr via pointed follow-up of known galaxy lenses, while lensed sGRBs and afterglows remain rare or undetectable with current-generation facilities.

  8. Divergence-free unfitted finite element discretisations for the Darcy problem

    math.NA 2026-03 unverdicted novelty 5.0

    An unfitted H(div)–discontinuous-pressure Darcy scheme with flux and mixed stabilisations is claimed to be cut-robust, locally mass-conserving, and optimally convergent.

  9. SN 2025aico: Early observations of a faint Type IIb supernova with a low-mass envelope

    astro-ph.SR 2026-07 accept novelty 4.0

    SN 2025aico is a low-luminosity Type IIb from a compact He star (M_env≈0.01 M⊙, R_env≈6–10 R⊙) with M_Ni≈0.033 M⊙, M_ej≈2.8 M⊙ and weak-to-moderate 56Ni mixing.

  10. Gamma-ray bursts reveal the history and faint contributors of cosmic reionization

    astro-ph.CO 2026-07 conditional novelty 4.0

    Long gamma-ray bursts imply a higher cosmic star formation rate density at z>6 than galaxy surveys detect, sufficient to drive reionization with moderate ionizing efficiency and escape fraction, implying a large popul...

  11. Discovery of a Supernova Following the Einstein Probe Transient EP250302a at z = 1.131

    astro-ph.HE 2026-06 unverdicted novelty 4.0

    The paper identifies supernova emission matching a scaled SN 1998bw template in the late-time light curve of EP250302a at z=1.131, with early data constraining the jet Lorentz factor above 25.

  12. EP260321a/SN 2026gzf: The Faintest Shock Breakout Associated with a Broad-Lined Supernova

    astro-ph.HE 2026-06 unverdicted novelty 4.0

    EP260321a is identified as the faintest shock breakout X-ray transient associated with broad-lined Ic supernova SN 2026gzf, interpreted as originating from a mildly relativistic weak outflow choked inside the progenitor star.

  13. GRB 260310A/SN 2026fgk: Photometric and Spectroscopic Evolution of a Nearby GRB-Supernova and an Exceptionally Bright Afterglow at z=0.153

    astro-ph.HE 2026-05 unverdicted novelty 4.0

    Detailed photometric, spectroscopic, and modeling study of a low-redshift GRB-SN yielding nickel mass 0.4-0.5 solar masses, ejected mass 4-6 solar masses, and evidence for large-offset explosion in sub-solar metallicity gas.

  14. GRB 260310A/SN 2026fgk: Photometric and Spectroscopic Evolution of a Nearby GRB-Supernova and an Exceptionally Bright Afterglow at z=0.153

    astro-ph.HE 2026-05 unverdicted novelty 4.0

    GRB 260310A/SN 2026fgk is a spectroscopically confirmed Type Ic-BL supernova at z=0.153 with 0.4-0.6 times the luminosity of SN 1998bw, nickel mass 0.4-0.5 solar masses, ejected mass 4-6 solar masses, kinetic energy (...

  15. EP250827b/SN 2025wkm: An X-ray Flash-Supernova Powered by a Central Engine and Circumstellar Interaction

    astro-ph.HE 2025-12 conditional novelty 4.0

    EP250827b/SN 2025wkm is an X-ray flash supernova at z=0.1194 powered by a long-lived magnetar and disk winds interacting with extended circumstellar medium, without an on-axis relativistic jet.