Julian S. Sommer
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View article: Discovery and Extensive Follow-up of SN 2024ggi, a Nearby Type IIP Supernova in NGC 3621
Discovery and Extensive Follow-up of SN 2024ggi, a Nearby Type IIP Supernova in NGC 3621 Open
We present the discovery and early observations of the nearby Type II supernova (SN) 2024ggi in NGC 3621 at 6.64 ± 0.3 Mpc. The SN was caught hr after its explosion by the ATLAS survey. Early-phase, high-cadence, and multiband …
View article: The glow of axion quark nugget dark matter
The glow of axion quark nugget dark matter Open
Context . The existence of axion quark nuggets is a potential consequence of the axion field, which provides a possible solution to the charge-conjugation parity violation in quantum chromodynamics. In addition to explaining the cosmologic…
View article: The glow of axion quark nugget dark matter. Part I. Large scale structures
The glow of axion quark nugget dark matter. Part I. Large scale structures Open
Axion quark nuggets (AQN) are hypothetical, macroscopically large objects with a mass greater than a few grams and sub-micrometer size, formed during the quark-hadron transition. Originating from the axion field, they offer a possible reso…
View article: The Optical Light Curve of GRB 221009A: The Afterglow and the Emerging Supernova
The Optical Light Curve of GRB 221009A: The Afterglow and the Emerging Supernova Open
We present extensive optical photometry of the afterglow of GRB 221009A. Our data cover 0.9–59.9 days from the time of Swift and Fermi gamma-ray burst (GRB) detections. Photometry in rizy -band filters was collected primarily with Pan-STAR…
View article: The optical light curve of GRB 221009A: the afterglow and the emerging supernova
The optical light curve of GRB 221009A: the afterglow and the emerging supernova Open
We present extensive optical photometry of the afterglow of GRB~221009A. Our data cover $0.9 - 59.9$\,days from the time of \textit{Swift} and \textit{Fermi} GRB detections. Photometry in $rizy$-band filters was collected primarily with Pa…