Li, JianJianLiTorres, Diego F.Diego F.TorresCoti Zelati, FrancescoFrancescoCoti ZelatiPAPITTO, ALESSANDROALESSANDROPAPITTOKerr, MatthewMatthewKerrRea, NandaNandaRea2021-02-102021-02-1020182041-8205http://hdl.handle.net/20.500.12386/30278Based on a theoretical selection of pulsars as candidates for detection at X-ray energies, we present an analysis of archival X-ray observations performed with Chandra and XMM-Newton of PSR J1747-2958 (the pulsar in the “Mouse” nebula), PSR J2021+3651 (the pulsar in the “Dragonfly” nebula), and PSR J1826-1256. X-ray pulsations from PSR J1747-2958 and PSR J1826-1256 are detected for the first time, and a previously reported hint of an X-ray pulsation from PSR J2021+3651 is confirmed with a higher significance. We analyze these pulsars’ spectra in regard to the theoretically predicted energy distribution, finding a remarkable agreement, and provide here a refined calculation of the model parameters taking into account the newly derived X-ray spectral data.STAMPAenArticle10.3847/2041-8213/aae92b2-s2.0-85057876610000451002200006https://iopscience.iop.org/article/10.3847/2041-8213/aae92b2018ApJ...868L..29LFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_10 High energy and particle astronomy – X-rays, cosmic rays, gamma rays, neutrinos