GRANAT


Also found in: Dictionary, Wikipedia.

GRANAT

A Russian satellite devoted to high-energy astronomy, launched in Dec. 1989 into a highly eccentric orbit (apogee: 30 Earth radii, perigee: 3000 km) with a period of 4.09 days and inclination 49°. The payload includes two types of instruments.

The narrow-field instruments – SIGMA, ART–P, and ART–S – are designed to observe point sources at a variety of energies. SIGMA is a coded-mask telescope imaging low-energy γ-ray sources in the energy range 30–2000 keV; it can also make spectral and temporal measurements. ART–P is an X-ray imaging telescope with a coded mask and four independent gas proportional counters; operating over the energy range 3–100 keV, it is designed to provide X-ray images of localized sources. ART–S is a hard X-ray/γ-ray spectroscope constructed from four gas proportional counters; operating over the spectral range 3–150 keV, it performs spectral and time analysis of relatively bright localized sources.

The wide-field telescopes – Phebus and Konus – are designed to observe the entire sky and detect transient events, especially gamma-ray bursts. Both have detector elements distributed around the spacecraft for all-sky coverage, and provide the location as well as a spectral and time analysis of the bursts. Phebus operates over the energy range 0.1–100 MeV, Konus over the range 0.02–20 MeV.

The payload also includes the Tournasol experiment, which has a narrow field of view but can also observe transient events because it is on a gimbal mount that can slew automatically to the direction of a burst localized by Konus. Mounted on the gimbal are two optical detectors and four proportional counters, designed for the optical detection of γ-ray bursts and the X-ray spectral analysis (2–20 keV) of any burst decay ‘tails’.

References in periodicals archive ?
"The coach is still analizing their pros and cons and looking at their technical play," Granat said.
"The market for risk management solutions and compliance training is rapidly growing throughout the Middle East," said Peter Granat, CEO of SAI Global.
Jim Granat has sailed through some tricky times in the financial industry, including post-9/11 and the 2008 economic downturn.
(10) Laparoscopy, pregnancy USG Pokoly (11) 26,1 Left HSG, Ectopic Laparoscopy pregnancy Kim (12) 28,1 Left Laparotomy Ectopic pregnancy Granat 23,1 Left HSG, IVP, Ectopic et al.
PR Newswire's CEO Bob Gray will be transitioning out of the business and Peter Granat will be the CEO of the combined organisation.
Helicopters Mi-8s and Mi-24s of Russian Air Force as well as unmanned aerial vehicles "Granat," "Zastava," and "Forpost" have reportedly provided air reconnaissance and support.
Polish mezzosoprano Magdalena Idzik and pianist Tamara Granat will also perform an evening of opera at tonight's event, which also includes a special dinner, from 8pm.
Vladimir Granat completed the rout nine minutes from time with Russia's fourth.
eDiscovery Institute; Linda Klein, Past President, Georgia State Bar Association; Ron Friedmann; Jeff Fowler, O'Melveny & Myers; Richard Granat, Co-Chair of the ELawyering Task Force and Standing Committee Delivery of Legal Services, American Bar Association ; Eddie Sheehy, CEO, Nuix; Steve Lief, EpsteinBecker; Arnold Blair; Cooley Godward; Kevin Cranman, GC, Ericsson; Patrick Oot; Laura Zubulake, Christy Stouffer, Patton Boggs; Tom Gricks, Schnader Harrison Segal & Lewis LLP; Fernando Pinguelo, Scarinci Hollenbeck; David Werblow, T-Mobile; Kara Buzga, Mayer Brown; Margaret Morton, Technology Consultant; and other well-known legal icons.
Richard Granat and Stephanie Kimbro, have been appointed as co-directors of the CLPT.
Class of 1966: Bruce Antognioni, Bonnie Backholm, Suzan Bessette, Vernon Boudreau, Carl Chabot, Gerald Champagne, Robalee Chapin Riley, Donna Delmonic, Kathleen Donovan Granat, Edward Dubuque, Louise Duxbury, Wayne Dwyer, Steven Erickson, Judith Fuller McBride, Paul Gimmalvo, Patricia Lamoureau, Rosalie LeBlanc Hardy, Roger Lizotte, Pamela MacAloney, Brian McMilleon, Kenneth McMilleon, Barbara Muer, Kathy Newcombe, Martha St.