EGRET inf 100MeV HiPS

This data presents all-sky maps of diffuse gamma radiation in energy ranges between 100 MeV to 150 MeV, based on data collected by the EGRET instrument on the Compton Gamma Ray Observatory. EGRET detected gamma rays in the energy range from 30 MeV to over 30 GeV, with an energy resolution of 20-25% over most of that range. The instrument is described in Hughes et al. (1980), Kanbach (1988, 1989), Thompson et. al (1993) and Esposito et al. (1998). The work described here started with standard EGRET all-sky maps (ftp://cossc.gsfc.nasa.gov/compton/data/egret/high_level/combined_data) of photon counts, instrument exposure, and gamma-ray intensity, binned in 0.5 degree pixels, in both Galactic and equatorial coordinates. The energy ranges in MeV are: (narrow ranges) 30-50, 50-70, 70-100, 100-150, 150-300, 300-500, 500-1000, 1000-2000, 2000-4000, 4000-10000; (broader ranges) 30-100, 100-300, 300-1000; (integral ranges) >100, >300, >1000.

本数据集呈现了100~150 MeV（兆电子伏特）能段内的弥漫伽马辐射全天图，数据源自康普顿伽马射线天文台（Compton Gamma Ray Observatory）搭载的EGRET仪器采集的观测资料。EGRET仪器可探测30 MeV至30 GeV（吉电子伏特）以上能段的伽马射线，在该能段的绝大多数区间内，其能量分辨率为20%~25%。该仪器的详细设计与性能参数可见Hughes等（1980）、Kanbach（1988、1989）、Thompson等（1993）以及Esposito等（1998）的相关研究成果。本研究以标准EGRET光子计数、仪器曝光量及伽马辐射强度全天图为基础，上述原始数据以0.5°像素分箱，涵盖银道坐标系与赤道坐标系两套坐标系统，数据下载地址为ftp://cossc.gsfc.nasa.gov/compton/data/egret/high_level/combined_data。本次研究涉及的能段单位为MeV，具体划分如下：窄能区：30~50、50~70、70~100、100~150、150~300、300~500、500~1000、1000~2000、2000~4000、4000~10000；宽能区：30~100、100~300、300~1000；积分能区：>100、>300、>1000。