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289 papers
AGILE gamma-ray detection of the exceptional GRB 221009A
M. Tavani, G. Piano, A. Bulgarelli +47
Gamma-ray emission in the MeV-GeV range from explosive cosmic events is of invaluable relevance to understanding physical processes related to the formation of neutron stars and bl…
XMM-Newton and INTEGRAL observations of the bright GRB 230307A : vanishing of the local absorption and limits on the dust in the Magellanic Bridge
Sandro Mereghetti, Michela Rigoselli, Ruben Salvaterra +2
230307A is the second brightest gamma ray burst detected in more than 50 years of observations and is located in the direction of the Magellanic Bridge. Despite its long duration,…
Timing the X-ray pulsating companion of the hot-subdwarf HD 49798 with NICER
Michela Rigoselli, Davide De Grandis, Sandro Mereghetti +1
HD 49798 is a hot subdwarf of O spectral type in a 1.55 day orbit with the X-ray source RX J0648.0-4418, a compact object with spin period of 13.2 s. We use recent data from the NI…
The power of the rings: the GRB 221009A soft X-ray emission from its dust-scattering halo
Andrea Tiengo, Fabio Pintore, Beatrice Vaia +11
GRB 221009A is the brightest gamma-ray burst (GRB) ever detected and occurred at low Galactic latitude. Owing to this exceptional combination, its prompt X-ray emission could be de…
The IXPE view of GRB 221009A
Michela Negro, Niccoló Di Lalla, Nicola Omodei +108
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. GR…
Limiting the accretion disk light in two mass transferring hot subdwarf binaries
Kunal Deshmukh, Thomas Kupfer, Pasi Hakala +6
We report the results from follow-up observations of two Roche-lobe filling hot subdwarf binaries with white dwarf companions predicted to have accretion disks. ZTF J213056.71+4420…