http://www.rssboard.org/rss-specification 720 http://ecuip-xtf.lib.uchicago.edu/xtf/search?docsPerPage%3D100;f12-associated-Lesson%3DGamma%20Ray%20Tools Results for your query: docsPerPage=100;f12-associated-Lesson=Gamma Ray Tools Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/64325main_swift-si/64325main_swift-si.dc.xml Swift's three scientific instruments work together to learn as much as possible about gamma-ray bursts. The Burst Alert telescope (BAT) is the first instrument to detect gamma-rays in the quarter of the sky at which it is pointed. Then the satellite is reoriented using data from BAT so that XRT and UVOT, which have a much smaller field of view, can be pointed at the GRB. With this information, ground-based telescopes can be pointed directly at the source to gather more data about the GRB. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/64325main_swift-si/64325main_swift-si.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/68168main_swift-burst_m/6168main_swift-burst_m.dc.xml An artist's concept of the Swift Gamma-Ray Burst Explorer catching a gamma-ray burst. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/68168main_swift-burst_m/6168main_swift-burst_m.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GCN/GCN.dc.xml Schematic of the GRB Coordinates Network (GCN), a system that distributes information about the location of a gamma-ray burst (GRB). The spacecraft sends the GRB location information down to a ground station, which in turn relays it to the GCN at the NASA Goddard Space Flight Center. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GCN/GCN.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GPN-2000-000451/GPN-2000-000451.dc.xml Jupiter and its four planet-sized moons, called the Galilean satellites, were photographed in early March 1979 by Voyager 1 and assembled into this collage. Io is the moon in the upper left corner of the image, and is the moon that is closest to Jupiter. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GPN-2000-000451/GPN-2000-000451.dc.xml Thu, 01 Mar 1979 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GRB090423/GRB090423.dc.xml 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. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GRB090423/GRB090423.dc.xml Thu, 23 Apr 2009 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GRIS_Ge_detectors/GRIS_Ge_detectors.dc.xml GRIS consists of seven of the world's largest, high-purity, n-type germanium (Ge) detectors. The detectors are cooled to liquid nitrogen temperatures (in order to achieve high resolution) and are surrounded by a thick anti-coincidence shield which allows the rejection of background events from true astrophysical events. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GRIS_Ge_detectors/GRIS_Ge_detectors.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GRIS_config/GRIS_config.dc.xml Diagram illustrating the placement of the detectors and shields. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GRIS_config/GRIS_config.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GRIS_fall95/GRIS_fall95.dc.xml The balloon and GRIS payload head up to a float altitude of approximately 40 km. At float, the 39-million cubic foot balloon will expand to about the size of a football field. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/GRIS_fall95/GRIS_fall95.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/PIA02254/PIA02254.dc.xml Voyager 2 took this picture of Io July 10, 1979, from a range of 1.2 million kilometers (750,000 miles). The image was part of an extensive sequence of "volcano watch" pictures of Io. The sunlit crescent of Io is seen at the left, and the night side illuminated by light reflected from Jupiter can also be seen. Three volcanic eruption plumes are visible on the limb. All three were previously seen by Voyager 1. On the bright limb Plume 5 (upper) and Plume 6 (lower) are about 100 kilometers high, while Plume 2 on the dark limb is about 185 kilometers high and 325 kilometers wide. The "volcano watch" sequence of pictures told us that these volcanoes are persistent, change with time, and are larger and last longer than those on Earth. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/PIA02254/PIA02254.dc.xml Tue, 10 Jul 1979 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/coded_aperture/coded_aperture.dc.xml Incoming light hits the coded aperture mask, casting a shadow on the detector. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/coded_aperture/coded_aperture.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/d_mcd-1/d_mcd-1.dc.xml The McDonald telescopes are located atop Mount Fowlkes (in the far background) and Mount Locke (in the foreground) in the Davis Mountains of West Texas. The telescopes are used by faculty and students in the University of Texas at Austin’s Astronomy department to study black holes and dark energy among other astronomical phenomena and mysteries. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/d_mcd-1/d_mcd-1.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/detector_module/detector_module.dc.xml On the right you can see the CZT detectors that form one 8 x 16 array. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/detector_module/detector_module.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/harvard-acis-chandra/harvard-acis-chandra.dc.xml The Advanced CCD Imaging Spectrometer is an instrument on the Chandra X-Ray Observatory that consists of an array of charged coupled devices. ACIS is especially useful because it can make X-ray images, and at the same time, measure the energy of each incoming X-ray, so that scientists can make pictures of objects using only X-rays produced by a single chemical element. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/harvard-acis-chandra/harvard-acis-chandra.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/nustar1/nustar1.dc.xml The artist’s conception illustrates the orientation of the detectors and optics on the satellite. The solar panel on the left provides power to the telescope. The yellow module on the far right contains the new technology optics which consists of two mirrors. These mirrors focus the hard X-rays and soft gamma rays onto the detectors at the other end of the deployable mast. The optics and the detectors must be separated by 10 meters (30 feet). The detectors and optics are launched close together because they just fit in the existing rockets used to launch satellites into space; the mast is extended after launch. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/nustar1/nustar1.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/opo0206g/opo0206g.dc.xml A technician holds the Wide-Field Detector, a CCD device. It is one of three cameras that make up the Advanced Camera for Surveys on the Hubble Space Telescope. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/opo0206g/opo0206g.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/twoComponentJetStream_960x540/twoComponentJetStream_960x540.dc.xml 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. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/twoComponentJetStream_960x540/twoComponentJetStream_960x540.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/voyager1/voyager1.dc.xml Voyager 1 and 2 were launched 16 days apart in 1977 to study Jupiter and Saturn. In September 2013, NASA reported that Voyager 1 had entered interstellar space, placing it more than 11 billion miles from the Sun and making it the most distant human-made object. As of 2013, Voyager 2 is in the heliosheath, the outermost layer of the immense magnetic bubble, called the heliosphere, that contains our solar system. Both Voyager 1 and 2 are still sending scientific information about their surroundings through the Deep Space Network (DSN). http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/voyager1/voyager1.dc.xml Thu, 01 Jan 1970 12:00:00 GMT