نتایج جستجو برای: 1806
تعداد نتایج: 1066 فیلتر نتایج به سال:
Myotis albescens (É. Geoffroy Saint-Hilaire, 1806) is a vespertilionid bat commonly called the silver-tipped myotis. A small bat with unique frosting of the hair dorsally and ventrally, it is 1 of about 100 species of Myotis worldwide and 1 of 12 species of Myotis in South America. It is one of the most widely distributed species in the genus occurring from southern Mexico to Argentina in diver...
We highlight how the downward revision in the distance to the star cluster associated with SGR1806–20 by Bibby et al. reconciles the apparent low contamination of BATSE short GRBs by intense flares from extragalactic magnetars without recourse to modifying the frequency of one such flare per 30 years per Milky Way galaxy. We also discuss the variety in progenitor initial masses of magnetars bas...
On 27 December 2004, a giant gamma flare from the Soft Gamma-Ray Repeater 1806-20 saturated many satellite gamma-ray detectors, being the brightest transient event ever observed in the Galaxy. AMANDA-II was used to search for down-going muons indicative of high-energy gammas and/or neutrinos from this object. The data revealed no significant signal, so upper limits (at 90% C.L.) on the normaliz...
Keys to 55 genera of spider wasps of Russia and neighbouring countries in females and males are given. Of them 34 genera are distributed in Russia. An annotated list of genera with type species and distribution data within Russia and biogeographical regions is given. The genus Xenaporus Ashmead, 1902 and X. eremocanus Wolf, 1990 are newly recorded from Russia. According to ICZN 1995 (Opinion 18...
In order to observe nearly simultaneous emission from Gamma-ray Bursts (GRBs), the Robotic Optical Transient Search Experiment (ROTSE) receives triggers via the GRB Coordinates Network (GCN). Since beginning operations in March, 1998, ROTSE has also taken useful data for 10 SGR events: 8 from SGR 1900+14 and 2 from SGR 1806-20. We have searched for new or variable sources in the error regions o...
The data collected by the Pierre Auger Observatory are analyzed to search for coincidences between the arrival directions of high-energy cosmic rays and the positions in the sky of astrophysical transients. Special attention is directed towards gamma ray observations recorded by NASA’s Swift mission, which have an angular resolution similar to that of the Auger surface detectors. In particular,...
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