Author

CNRS

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2 papers

High-energy and Very High-energy Constraints from Log-parabolic Spectral Models in Narrow-line Seyfert 1 Galaxies

Narrow-line Seyfert 1 galaxies (NLSy1s) are a well-established class of $\gamma$-ray sources, showing the presence of a jet like the more common flat-spectrum radio quasars. The evidence of $\gamma$-ray emission poses the issue of the…

High Energy Astrophysical Phenomena · Physics 2020-04-15 Stefano Vercellone , Luigi Foschini , Patrizia Romano , Markus Böttcher , Catherine Boisson , INAF , Osservatorio Astronomico di Brera , Via Emilio Bianchi 46 , I-23807 Merate , Italy , Centre for Space Research , North-West University , Potchefstroom , 2531 , South Africa , LUTH , Observatoire de Paris , CNRS , Universite Paris Diderot , PSL Research University Paris , 5 place Jules Janssen , F-92195 Meudon , France

NuSTAR Discovery of a cyclotron line in KS 1947+300

We present a spectral analysis of three simultaneous NuSTAR and Swift/XRT observations of the transient Be-neutron star binary KS 1947+300 taken during its outburst in 2013/2014. These broad-band observations were supported by Swift/XRT…

High Energy Astrophysical Phenomena · Physics 2019-08-19 Felix Fuerst , Katja Pottschmidt , Joern Wilms , Jamie Kennea , Matteo Bachetti , Eric Bellm , Steven E. Boggs , Deepto Chakrabarty , Finn E. Christensen , William W. Craig , Charles J. Hailey , Fiona Harrison , Daniel Stern1 , John A. Tomsick , Dominic J. Walton , William Zhang , Cahill Center , Caltech , USA , CSST , UMBC , USA , CRESST , GSFC , USA , Remeis-Observatory , ECAP , Germany , Penn State University , USA , Universite de Toulouse , France , CNRS , IRAP , France , SSL , UCB , USA , Kavli Institute for Astrophysics , MIT , USA , DTU Space , TU Denmark , Denmark , Columbia Astrophysics Lab , Columbia University , USA , JPL , USA , GSFC , ASD , USA