权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Study of Low Energy Gamma-Rays from Supernova Remnants (SM1987A) Abroard Balloons

气球上超新星遗迹（SM1987A）低能伽马射线的研究

基本信息

批准号：
63041040
负责人：
KAMAE Tuneyoshi
金额：
$ 14.72万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63041040/
关键词：
Balloon-borne experiments Balloon SN1987A Hard X-ray gammaray detector Brazil

项目摘要

We have carried out balloon-borne experiments in collaboration with the INPE (Institute of Space Research) Brazilian balloon group. The major objectives are to launch large stratospheric balloons and to observe hard X-rays/gamma-rays from astronomical objects such as SN1987A. The detectors were prepared by the japanese group (Univ. of Tokyo, ISAS and others). The launching operation was responsibility of the brazilian side while the radio communication was responsibility of the Japanese group.In 1988, two balloons were launched from Pocos de Caldas on November 24 and 28. One balloon (5X10^6ft^3) carried the hard X-ray detector (187kg) and the other (20X10^6ft^3) carried the gamma-ray detector (865 Kg).In the last two years, we moved to the INPE balloon base in Cachoerira Paulista (45 00 34W, 22 39 44S). We have set up a communication facility that allows frequent campaign for several years. Using the facility, we have launched balloons carring our new hard X-rays/gamma rays detector (Welcome1 (Well-type Compound Eye-1, 670kg)).In 1989, one balloon (6.6X10^6ft^3) was launched on Dec. 22. Unfortunately, due to failure of the electronics in vacuum condition at the ceiling altitude, we could not take scientific data. The star camera system, command system and other equipment, however worked well and gave us technical information on the detector.In 1990, two balloons (6.6 and 8.8X10^6ft^3) were launched on Nov. 14 and Nov. 29. In the first flight, we could not control the direction of our detector due to failure of the telecommand system and took background data. In the second flight, we succeeded in observing SN1987A for about 4 hours. Data is now under analysis. The background data at the ceiling altitude shows that the sensitivitiesーa few X10^<-6>/cm^2/s/keV and ー10^<-4>/cm^2/s are attained for the continuum spectrum and line spectrum respectively. These values are about 5 times superior to the previous type of detectors used in balloon-borne experiments.

我们与空间研究所巴西气球小组合作进行了气球实验。主要目标是发射大型平流层气球，并观测SN 1987 A等天文物体的硬X射线/伽马射线。探测器由日本小组（东京大学、日本原子能研究所等）研制。1988年，两个气球分别于11月24日和28日从波科斯德卡尔达斯发射升空。其中一个气球（5 × 10^6立方英尺）携带硬X射线探测器（187公斤），另一个气球（20 × 10^6立方英尺）携带伽马射线探测器（865公斤）。在过去的两年里，我们搬到了位于卡舒埃拉保利斯塔的INPE气球基地（45 00 34 W，22 39 44 S）。我们已经建立了一个通信设施，允许几年频繁的运动。利用该设施，我们发射了携带我们新的硬X射线/伽马射线探测器（Welcome 1（井型复眼-1，670公斤））的气球。1989年，12月22日发射了一个气球（6.6X10^6英尺^3）。不幸的是，由于电子设备在天花板高度的真空条件下出现故障，我们无法获取科学数据。然而，星星照相系统、指令系统和其他设备工作良好，并为我们提供了探测器的技术信息。1990年，两个气球（6.6和8.8X10^6英尺^3）分别于11月14日和11月29日发射。在第一次飞行中，由于遥控系统故障，我们无法控制探测器的方向，并获取后台数据。在第二次飞行中，我们成功地观察了SN 1987 A约4小时。数据正在分析中。天花板高度的本底数据表明，对连续谱和线状谱的灵敏度分别达到了× 10 ~ 4<-6>/cm ~ 2/s/keV和× 10 ~ 4<-4>/cm ~ 2/s。这些值比气球实验中使用的以前类型的探测器高出约5倍上级。