Sequences in the Hardness Ratio-Peak Energy Plane of Gamma-Ray Bursts

The narrowness of the distribution of the peak energy of the vFv spectrum of gamma-ray bursts (GRBs) and the unification of GRB populations are great puzzles yet to be solved. We investigate the two puzzles based on the global spectral behaviors of different GRB populations, the long GRBs, the short GRBs, and the X-ray flashes (XRFs), in the HR - Ep plane (HR the spectral hardness ratio) with BATSE and HETE-2 observations. It is found that the long GRBs and the XRFs observed by HETE-2 seem to follow the same sequence in the HR-Ep plane, with the XRFs at the low end of this sequence. We fit the sequence by a universal Band function, and find that this sequence is mainly defined by the low energy index α, and is insensitive to the high energy index,β. With fixed β=-5, a best fit is given by α=-1.00 with X^2min/dof=2.2. The long and short GRBs observed by BATSE follow significantly different sequences in the HR-Ep plane, with most of the short GRBs having a larger hardness ratio than the long GRBs at a given Ep. For the long GRBs a best-fit yields α=-0.30 and β=-2.05. For the short GRBs, a best fit gives α=-0.60 with x^2min=1.1 (withβfixed at-2.0 because it is numerically unstable). The α value for the short GRBs is significantly greater than that for the long GRBs. These results indicate that the global spectral behaviors of the long GRB sample and the XRF sample are similar, while that of the short GRBs is different. The short GRBs seem to be a unique subclass of GRBs, and they are not the higher energy extension of the long GRBs.     

安徽：整改不到位不恢复农转非审批

近日，安徽省国土资源厅就恢复农用地转用和征地审批有关问题发出通知。通知强调，凡是在治理整顿期间违反土地集中统一管理规定、国土资源部和省政府批办违法案件未上报处理结果和存在问题整改不到位的市、县，将暂停恢复农用地转用和征地的审批。恢复农用地转用和征地审批后，各地要严格按照国家和省有关法律法规和国务院《决定》、《安徽省人民政府关于深化改革严格土地管理有关问题的通知》及《安徽省国土资源厅、安徽省发展和改革委员会关于下达2005年全省土地利用计划的通知》要求，     

节约集约用地需强力推进——读鹤壁市《勇闯新路谱新篇》有感

本期《经验交流》栏目发表了这样一篇文章《勇闯新路谱新篇——喜看河南鹤壁强化节约集约用地新探索》。读后，使人有耳目一新之感，有许多话涌上心头。我们不仅为该市千方百计节约用地的做法叫好，更为该市领导以惊人的气魄强力推进节约集约用地的胆略而称道。     

面临垂直管理的基层国土所建设

基层国土资源所是国土资源管理工作的基础.近年来,基层国土资源所的建设正在稳步推进,但同时也要看到,基层国土资源所在机构设置、职能转换、人员素质等方面还存在诸多问题.     

宝泉岭国土资源局土地市场整顿坚持“三结合”

农垦宝泉岭国土资源局坚持土地市场治理整顿与完善土地管理体制相结合，与创新土地经营机制相结合，与保障发展、改善服务相结合，做到“底数清、目标明、要求严、效果好”。     

土地使用中的“民不举”违法行为初探

随着社会和经济的发展，近几年来，各地使用土地违法违规案件不仅逐年增多。而且呈多样性，复杂性和隐蔽性趋势。一些违法违规用地案件在社会和广大群众的关注下，国土资源部依法进行了处理，受到广大群众的称赞。但是，也有一些案件由于“民不举”所致，长时间无人发现，有的甚至无人问津。结果，有的侥幸逃过国土资源部门的查处。有资料统计，某市一个区的国土资源部门近两年经过大量走访调查和巡查，发现“民不