720 XTF Search Results (expand=subject;f1-subject=Gamma Ray Burst);f1-subject%3DGamma%20Ray%20Burst Results for your query: expand=subject;f1-subject=Gamma Ray Burst Thu, 01 Jan 1970 12:00:00 GMT Types of gamma-ray bursts (GRBs). This graphic illustrates the different sources and processes that result in long and short gamma-ray bursts. The left panel shows the collapse of a giant star that is thought to lead to a long GRB. The right panel shows the inspiral and coalescence of two neutron stars, which is thought to result in a short GRB. Thu, 01 Jan 1970 12:00:00 GMT BATSE GRB distribution map. Each dot on the elliptal surface of this map represents the location of one of 2704 gamma-ray bursts detected by BATSE during its 9-year mission. The map’s perspective places the plane of the Milky Way centered horizontally across the map. The bursts are color-coordinated according to intensity with long, intense bursts colored red, and short, weaker bursts colored purple. Note that the majority of the bursts are colored green, which denote medium energy and/or duration. Thu, 01 Jan 1970 12:00:00 GMT Typical Prompt GRB Spectrum. The typical spectrum of a gamma burst delineates the spectral range of two instruments on the Fermi Space Telescope: the Gamma-ray Burst Monitor (GBM) and Large Area Telecope (LAT). Thu, 01 Jan 1970 12:00:00 GMT GRB 090423. One for the record books, gamma-ray burst 090423 was detected April 23, 2009, by the Swift Gamma-Ray Burst Explorer mission. The image is a composite of data from UVOT and XRT. The image is fuzzy because XRT does not have high enough resolution to produce sharp images. Thu, 23 Apr 2009 12:00:00 GMT Gamma Ray Sky Map. This all-sky image made in 2011 was constructed using two years of observations by NASA's Fermi Gamma-ray Space Telescope. It shows how the sky appears at energies greater than 1 billion electron volts (1 GeV). Brighter colors indicate brighter gamma-ray sources. A diffuse glow fills the sky and is brightest along the plane of our galaxy (middle). Discrete gamma-ray sources include pulsars and supernova remnants within our galaxy, as well as distant galaxies powered by supermassive black holes. Thu, 01 Jan 1970 12:00:00 GMT GRB 050709. Gamma-ray bursts longer than two seconds are the most common type and are widely thought to be triggered by the collapse of a massive star into a black hole. As matter falls toward the black hole, some of it forms jets in the opposite direction that move near the speed of light. These jets bore through the collapsing star along its rotational axis and produce a blast of gamma rays after they emerge. This artist's rendering depicts a GRB that was discovered on July 9, 2005, by NASA's High-Energy Transient Explorer (HETE). Sat, 09 Jul 2005 12:00:00 GMT Hubble Stays on Trail of Fading Gamma-Ray Burst Fireball, Results Point to Extragalactic Origin. It is difficult to determine the origin of a GRB, but sometimes it can be done. The visible light of this GRB was detected by ground-based telescopes, and once the light had faded a deep picture by the Hubble showed this GRB was located in a faint distant galaxy Fri, 05 Sep 1997 12:00:00 GMT GRB 970228 w/X-ray counterpart. Eight hours after the detection of GRB 970228, BeppoSax was able to isolate an X-ray source at the location in the Orion constellation. This is the first X-ray counterpart data captured following a gamma-ray burst. Fri, 28 Feb 1997 12:00:00 GMT Naked-Eye Gamma-ray Burst Model for GRB 080319B. Gamma-ray bursts that are longer than two seconds are caused by the detonation of a rapidly rotating massive star at the end of its life on the main sequence. Jets of particles and gamma radiation are emitted in opposite directions from the stellar core as the star collapses. In this model, a narrow beam of gamma rays is emitted, followed by a wider beam of gamma rays. The narrow beam for GRB 080319B was aimed almost precisely at the Earth, which made it the brightest gamma-ray burst observed to date by NASA's Swift satellite. Thu, 01 Jan 1970 12:00:00 GMT Artist’s visualization of a collapsar. The collapsing star scenario that is one of the leading contenders as the cause of gamma-ray bursts. This artist's concept of the collapsar model shows the center of a dying star collapsing minutes before the star implodes and emits a gamma-ray burst that is seen across the universe. Many scientists say longer bursts (more than four seconds in duration) are caused by massive star explosions. Thu, 01 Jan 1970 12:00:00 GMT Crashing Neutron stars can make gamma-ray burst jets. Short gamma-ray bursts are difficult to study because they are so short. Less than 2 seconds is not a lot of time to find the burst and capture some data. These images show the merger of two neutron stars recently simulated using a new supercomputer model. Redder colors indicate lower densities. Green and white ribbons and lines represent magnetic fields. The orbiting neutron stars rapidly lose energy by emitting gravitational waves and merge after about three orbits, or in less than 8 milliseconds. The merger amplifies and scrambles the merged magnetic field. A black hole forms and the magnetic field becomes more organized, eventually producing structures capable of supporting the jets that power short gamma-ray bursts. Thu, 01 Jan 1970 12:00:00 GMT Swift Gamma-Ray Burst Explorer. An artist's concept of the Swift Gamma-Ray Burst Explorer catching a gamma-ray burst. Thu, 01 Jan 1970 12:00:00 GMT First GRB. Gamma-ray bursts (GRBs) are sudden outbursts of gamma rays from a particular place in the sky that last a few seconds or so. These outbursts are similar to what is seen in a nuclear bomb explosion, and the first GRBs were detected by the Vela satellites that monitored nuclear testing. This graph shows the sudden increase in gamma rays recorded for the first GRB detected by the monitoring satellites in 1967. Sun, 02 Jul 1967 12:00:00 GMT Artist’s visualization of a merging binary system. Gamma-ray bursts are common, yet random, and fleeting events that have mystified astronomers since their discovery in the late 1960s. Shorter bursts (less than two seconds in duration) are thought to be caused by mergers of binary systems with black holes or neutron stars. Thu, 01 Jan 1970 12:00:00 GMT First high-resolution details in gamma-ray burst host galaxy. The ESO 184-G82 galaxy has loose spiral arms with many bright regions where stars are forming. The inset shows an expanded view of one of the star-forming regions. The arrow shows the location the 1998 supernova explosion. This supernova was also a gamma ray source, showing supernova are the origin of some GRB's. Mon, 12 Jun 2000 12:00:00 GMT