A Study of Uhe Cosmic Gamma Rays at Mt. Chacaltaya - Gamma Ray Sources in SN 1987A and the Southern Ssy -

玻利维亚空气淋浴联合实验组在Mt上订购了两个空气淋浴阵列，以寻找点和干扰伽马射线来源。Chacaltaya （5200 m， 68.1^oW， 16.3^oS） in Bolivia。研究的目的将有助于解决宇宙射线起源的问题。在三年后的观测中，观察结果如下：1。X射线透射二进制（Vela X-1、Cen X-3、X1822-371）、Vela脉冲器、无线电银河（Cen A）、闪烁的X射线源（SS 433）和银河系中心被评估为比较上的数量--源低微波事件，其中背景宇宙射线估计来自非源微波源低微波事件。目前的结果显示，没有来自上方的物体的UHE伽马射线发射的重要证据。95%的C。L. L.“发射的最高限度是可用的。”对UHE伽马射线发射的观测，从1988年1月以来已携带。对DC的日常和每周变化进行了分析。没有明显的证据，涉及来自SN 1987 A的UHE伽马射线的到来。澳大利亚、新西兰、南非共和国和南极的任何团体也没有提供信息。能量高于100 TeV的伽马射线通量的上限估计为2.4 x10 ^<-13>厘米^<-2>s^<-1> （95%C.）L.）。3. 100 TeV以上能量的扩散伽马射线已被分析使用少量含量低的选定淋浴器。Our interesting region is that of 180^\- 210^\in right ascension （R. A.）和0^- -40^在1985年报告中的递减（增量）。好吧，它在这样一个地区找不到例外。在这个地区，135 - 150的新的一个在R.。A. A.和-20^∧--40 ^∧ in delta presents 4.6 sigma（sigma， standard deviation） of the excess。Li-Ma测试用于小事件，如何，显示3.2 sigma。因此，它似乎没有统计意义。

The Bolivian Air Shower Joint Experiment group has operated two air shower arrays in order to search for point and diffuse gamma-ray sources at Mt. Chacaltaya (5200m, 68.1^oW, 16.3^oS) in Bolivia. The purpose of the study is to make clear the problem on Cosmic Ray Origin.After three years observations, the observed results are as follows :1. UHE gamma-ray emission from X-ray eclipsing binaries (Vela X-1, Cen X-3, X1822-371), Vela pulsar, a radio galaxy (Cen A), a flaring X-ray source (SS433) and the center of Galaxy are examined by comparing the amount of onーsource low muon events with that of background cosmic rays estimated from off-source low muon events. The results at present show no significant evidence of UHE gamma-ray emission from the above mentioned objects. The 95% C. L. upper limits of the emission are obtained.2. Observation for UHE gamma-ray emission from notable SN1987A has been carried out since January 1988. The DC excess for daily and weekly variation was analyzed. There is no significant evidence concerning the arrival of UHE gamma-rays from SN1987A. No information is also presented any group in Australia, New Zealand, the Republic of South Africa and the South Pole. The upper limit on the flux of gamma-rays with energies above 100 TeV is estimated as being 2.4 x 10^<-13>cm^<-2>s^<-1> (95% C. L.).3. Diffuse gamma-rays with energies above 100 TeV is analyzed using selected shower with low content of muons. Our interesting region is that of 180^ﾟ - 210^ﾟ in right ascension (R. A.) and 0^ﾟ - -40^ﾟ in declination (delta) from the report in 1985. However, it wasn't found the excess in a such region. In place of this region, new one of 135^ﾟ- 150^ﾟ in R. A. and -20^ﾟ --40^ﾟ in delta presents 4.6sigma (sigma, standard deviation) of the excess. Li-Ma test for small number events, however, shows 3.2sigma. So, it seems statistically no significant.