4U 1728-34 (Credit: T. Strohmayer) This figure depicts a burst from the Low Mass X-ray Binary (LMXB) source 4U 1728-34 and the corresponding power density spectrum (PDS). For the duration of the burst, we see a quasi-periodic ocsillation (QPO) around 364 Hz, which current theories attribute to the X-ray emission from a hot spot on the surface of the spinning neutron star. This provides the first evidence for a millisecond spin period for a neutron star which is not a radio pulsar! Click here for a gif version Search for an Image: (Enter the name of an object.) Additions or Comments: Have we left anything out? Is there something you would like to have added to this page (a link to your own group's research page, for example...)? IMAGES | By Mission | Stars | Cataclysmic Variables | X-ray Binaries | Pulsars | Supernova Remnants & Planetary Nebulae | Galaxies | Active Galactic Nuclei | Clusters and Groups of Galaxies | X-ray/gamma-ray Background & Deep Fields | Solar System Objects | Gamma Ray Bursts HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public Last modified: Thursday, 26-Jun-2003 13:48:45 EDT