High Energy Gamma-Ray Observations of Peculiar Objects such as Pulsars and Active Galaxies

对脉冲星和活动星系等特殊物体的高能伽马射线观测

基本信息

批准号：
06044052
负责人：
KIFUNE Tadashi
金额：
$ 5.38万
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：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06044052/
关键词：
Gamma Ray Astronomy Pulsar Active Galaxy Supernova Remnant Origin of Cosmic Rays Acceleration of Cosmic Rays Air Cerenkov Telescope PSR1706-44 ガンマ線パルサー超高エネルギーガンマ線かにパルサー星雲帆座パルサー解像型チェレンコフ望遠鏡

项目摘要

(1) We have, by the end of the fiscal year 1994, obtained evidence of VHE (very high energy) gamma rays from Crab nebula and PSR B 1706-44. The data obtained in 1993 and 1994 suggested an interesting hint of VHE gamma ray signal from Vela pulsar direction, and data analysis, adding 1995 observation, was continued on the Vela as well as on other various objects in the southern sky.(2) We found that evidence of VHE gamma rays from Vela pulsar direction exist in all of the Vela data set over 1993 to 1995. The observed signal appears as "unpulsed" (not modulated with the pulsar period of 89 msec) and the emission region of VHE gamma rays is extended with its maximum intensity shifted by about 0.1ﾟ from the pulsar position. These features suggest that the VHE emission is not from the pulsar magnetosphere. A "wind" of energetic electrons and positrons (pulsar wind) is believed to be ejected from pulsar, causing a shock by colliding with circumstellar matter to emit gamma rays. It is likely that we have seen such a phenomenon in vicinity of the Vela pulsar.(3) From a binary pulsar PSR B 1259-63, we obtained evidence of about 5sigma significance, which encourages repeated observation.(4) We set an upper limit of VHE gamma ray flux from PKS 0521-365, the second nearest AGN (active galactic nuclei) among the GeV gamma ray AGN detected by the gamma ray satellite of Compton Gamma Ray Observatory. The result constrains on various models of gamma ray production as well as on infrared intensity in the extragalactic space.(5) We also studied an intesting object of GeV gamma ray source, CGRO J 1758-23, which includes supernova remnant, pulsar, radio point source and molecular cloud etc. No evidence of VHE gamma rays that appears as a point source was so far discovered, and the case of extended emission remains to be more carefully examined.(6) Prelimiary analysis shows no evidence of VHE emission from other objects such as AGN Centaurus A and pulsar PSR B 1055-52.

（1）在1994财政年度结束时，我们已经获得了蟹状星云和PSR B 1706-44的VHE（非常高能量）伽马射线的证据。 The data obtained in 1993 and 1994 suggested an interesting hint of VHE gamma ray signal from Vela pulsar direction, and data analysis, adding 1995 observation, was continued on the Vela as well as on other various objects in the southern sky.(2) We found that evidence of VHE gamma rays from Vela pulsar direction exist in all of the Vela data set over 1993 to 1995. The observed signal appears as "unpulsed" （不使用89毫秒的脉冲星周期调节），VHE伽马射线的发射区域被扩展，其最大强度从脉冲星的位置转移了约0.1 ﾟ。这些特征表明，VHE发射不是来自脉冲星磁层。据信，充满活力的电子和正电子的“风”被认为是从Pulsar弹出的，通过与折线物质碰撞发射伽玛射线，从而引起冲击。 It is likely that we have seen such a phenomenon in vicinity of the Vela pulsar.(3) From a binary pulsar PSR B 1259-63, we obtained evidence of about 5sigma significance, which encourages repeated observation.(4) We set an upper limit of VHE gamma ray flux from PKS 0521-365, The second nearest AGN (active galactic nuclei) among the GeV gamma由Compton Gamma Ray天文台的Gamma Ray卫星检测到的Ray Agn。 The result consists on various models of gamma ray production as well as on infrared intensity in the extragalactic space.(5) We also studied an intesting object of GeV gamma ray source, CGRO J 1758-23, which includes supernova remnant, pulsar, radio point source and molecular cloud etc. No evidence of VHE gamma rays that appears as a point source was so far discovered, and the case of extended emission remains to更仔细地检查。（6）初审分析没有其他物体（例如Agn Centaurus a和pulsar psr b 1055-52）发射的证据。