What question did this study set out to answer?

To characterize the multi-wavelength properties, explosion kinematics, and host galaxy environment of the nearby, underluminous long-duration GRB 260310A and its associated supernova SN 2026fgk.

August 16, 2026Monthly Notices of the Royal Astronomical SocietyOpen Access

GRB 260310A / SN 2026fgk: A Multi-Wavelength Study of a Nearby Underluminous Long GRB and SN with a Complex Afterglow

View Full Paper

Ask AI

Bookmark

Authors

RGRamandeep GillOpen University of Israel RBRosa L. BecerraUniversidad Autónoma de la Ciudad de México APAntonio de Ugarte PostigoAix-Marseille Université

Discussion

Member takes

Implication

Observational study reveals complex multi-wavelength afterglow dynamics in nearby GRB 260310A, indicating similar underluminous bursts may manifest primarily as orphan afterglows.

Key Points

To characterize the multi-wavelength properties, explosion kinematics, and host galaxy environment of the nearby, underluminous long-duration GRB 260310A and its associated supernova SN 2026fgk.
Analyzed dense multi-wavelength optical, X-ray, and radio photometric and spectroscopic observations of a nearby burst at z = 0.153, including data from COLIBRÍ and GTC.
Modeled afterglow light curves and spectral energy distributions using synchrotron emission from forward shocks under on-axis dirty fireball and misaligned structured jet scenarios.
Detected an underluminous prompt emission with a Comptonized spectrum located at a 15 kpc host-galaxy offset, accompanied by a Type Ic-BL supernova rebrightening at ~20 days.
Found optical-to-X-ray emission consistent with forward-shock synchrotron radiation and an initial Lorentz factor of Γ0 ~ 20–35, whereas radio observations require an extra emission component.
Demonstrated that equivalent bursts at typical cosmological distances (z ≳ 0.5) would evade prompt gamma-ray detection and appear solely as orphan afterglows or fast X-ray transients.

Cite This Study

Gill et al. (2026) studied this question.

synapsesocial.com/papers/6a8178fcf2fb91fc834ac3d2 https://doi.org/10.1093/mnras/stag1544

View Full Paper

Ask AI

Bookmark

Implication

Observational study reveals complex multi-wavelength afterglow dynamics in nearby GRB 260310A, indicating similar underluminous bursts may manifest primarily as orphan afterglows.

GRB 260310A / SN 2026fgk: A Multi-Wavelength Study of a Nearby Underluminous Long GRB and SN with a Complex Afterglow

Discussion

Member takes

Implication

Key Points

Cite This Study

GRB 260310A / SN 2026fgk: A Multi-Wavelength Study of a Nearby Underluminous Long GRB and SN with a Complex Afterglow

Discussion

Member takes

Implication

Key Points

Cite This Study

Also Consider

Also Consider