Discovery of mHz X-ray Oscillations in a Transient Ultraluminous X-ray Source in M82

Discovery of millisecond pulsars in radio searches of southern Fermi LAT sources

Discovery of new gamma-ray pulsars with AGILE

Discovery of Nine Gamma-Ray Pulsars in Fermi-LAT Data Using a New Blind Search Method

Discovery of one new class in the light curve of GRS 1915+105

Discovery of photon index saturation in the black hole binary GRS 1915+105

Discovery of Powerful Gamma-Ray Flares from the Crab Nebula

Discovery of Pulsations from the Pulsar J0205+6449 in SNR 3C 58 with the Fermi Gamma-Ray Space Telescope

Discovery of Pulsed $γ$-rays from PSR J0034-0534 with the Fermi LAT: A Case for Co-located Radio and $γ$-ray Emission Regions

Discovery of Pulsed Gamma Rays from the Young Radio Pulsar PSR J1028-5819 with the Fermi Large Area Telescope

Discovery of Quasi-Periodic Oscillations in the Recurrent Burst Emission from SGR 1806-20

Discovery of Red-Skewed K_alpha iron line in Cyg X-2 with Suzaku

Discovery of SN 2009nz Associated with GRB 091127

Discovery of Strong Radiative Recombination Continua from The Supernova Remnant IC 443 with Suzaku

Discovery of TeV Gamma Ray Emission from Tycho's Supernova Remnant

Discovery of the 51.47 day orbital period in the supergiant fast X-ray transient XTE J1739-302 with INTEGRAL

Discovery of the afterglow and host galaxy of the low redshift short GRB 080905A

Discovery of the black hole mass and soft lag relation in active galactic nuclei

Discovery of the Extremely Energetic Supernova 2008fz

Discovery of the infrared counterpart of CXOU J174437.3-323222 in the field of IGR J17448-3232: a blazar candidate viewed through the Galactic centre?