We report the discovery of the unusually bright long-duration gamma-ray burst (GRB), GRB
221009A, as observed by the Neil Gehrels Swift Observatory (Swift), Monitor of All-sky X-ray …

Object GRB 221009A is the brightest gamma-ray burst (GRB) detected in more than 50 yr of
study. In this paper, we present observations in the X-ray and optical domains obtained by …

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 …

The preliminary detections of the gamma-ray burst 221009A up to 18 TeV by LHAASO and
up to 251 TeV by Carpet 2 have been reported through Astronomer's Telegrams and …

We study an axion-like particle (ALP) that experiences a first-order phase transition with
respect to its mass or potential minimum. This can be realized if the ALP obtains a potential …

Recent astrophysical transient Swift J1913. 1+ 1946 is possibly associated with the gamma-
ray burst GRB 221009A at the redshift. The transient was accompanied by very high-energy …

We present the IXPE observation of GRB 221009A, which includes upper limits on the linear
polarization degree of both prompt and afterglow emission in the soft X-ray energy band …

GRB 221009A was the brightest gamma-ray burst ever detected on Earth. In its early
afterglow phase, photons with exceptional energies above 10 TeV were observed by …

We report observations of the optical counterpart of the long gamma-ray burst GRB
221009A. Due to the extreme rarity of being both nearby (z= 0.151) and highly energetic (E …

We present photometric and spectroscopic observations of the extraordinary gamma-ray
burst (GRB) 221009A in search of an associated supernova. Some past GRBs have shown …