DECam observations before/after supernova SN 2026ahvu
Autorzy: Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA Acknowledgment: PIs: G. Narayan & T. Murphey (University of Illinois at Urbana-Champaign) Image processing: M. Zamani & D. de Martin (NSF NOIRLab), CC BY 4.0
A comparison of spiral galaxy NGC 1433 before and after the detection of supernova SN 2026ahvu. The supernova appears as a very bright point of light to the right and slightly below the center of the galaxy. These images were captured by the U.S. Department of Energy-fabricated Dark Energy Camera (DECam), mounted on the U.S. National Science Foundation Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory (CTIO), a Program of NSF NOIRLab. DECam captured the before image as part of observations for the Dark Energy Survey (DES), a survey led by DOE’s Fermi National Accelerator Laboratory, conducted from 2013–2019, to investigate the nature of dark energy. The after image was taken a few days after the Asteroid Terrestrial-impact Last Alert System (ATLAS) first detected SN 2026ahvu on 2 November 2026. The final composite also includes observations taken between 2013 and 2018. Caught early and still approaching its expected maximum brightness, SN 2026ahvu gives astronomers a valuable opportunity to study a stellar explosion as it unfolds. NSF NOIRLab is coordinating observations across the facilities it operates, working with its partners to maximize scientific return, and inviting other observatories to join the effort.
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