...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical Journal. Supplement Series >The Bolocam Galactic Plane Survey: Survey description and data reduction
【24h】

The Bolocam Galactic Plane Survey: Survey description and data reduction

机译：Bolocam银河平面调查：调查描述和数据精简

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present the Bolocam Galactic Plane Survey (BGPS), a 1.1 mm continuum survey at 33″ effective resolution of 170 deg~2 of the Galactic Plane visible from the northern hemisphere. The BGPS is one of the first large area, systematic surveys of the Galactic Plane in the millimeter continuum without pre-selected targets. The survey is contiguous over the range-10.5 ≤ l ≤ 90.5, |b| ≤ 0.5. Toward the CygnusX spiral arm, the coverage was flared to |b| ≤ 1.5 for 75.5 ≤ l ≤_2 87.5. In addition, cross-cuts to |b| ≤ 1.5 were made atl = 3,15, 30, and 31. The total area of this section is 133 deg~2. With the exception of the increase in latitude, no pre-selection criteria were applied to the coverage in this region. In addition to the contiguous region, four targeted regions in the outer Galaxy were observed: IC1396(9deg~2, 97.5 ≤ l ≤ 100.5,2.25 ≤ b ≤ 5.25), a region toward the Perseus Arm (4 deg~2 centered onl = 111, b = 0 near NGC 7538), W3/4/5 (18 deg~2, 132.5 ≤ l ≤ 138.5), and Gem OB1 (6 deg~2, 187.5 ≤ l ≤ 193.5). The survey has detected approximately 8400 clumps over the entire area to a limiting non-uniform 1 σ noise level in the range 11-53 mJy beam-1 in the inner Galaxy. The BGPS source catalog is presented in a previously published companion paper. This paper details the survey observations and data reduction methods for the images. We discuss in detail the determination of astrometric and flux density calibration uncertainties and compare our results to the literature. Data processing algorithms that separate astronomical signals from time-variable atmospheric fluctuations in the data timestream are presented. These algorithms reproduce the structure of the astronomical sky over a limited range of angular scales and produce artifacts in the vicinity of bright sources. Based on simulations, we find that extended emission on scales larger than about 5.'9 is nearly completely attenuated (>90%) and the linear scale at which the attenuation reaches 50% is 3'.8. Comparison with other millimeter-wave data sets implies a possible systematic offset in flux calibration, for which no cause has been discovered. This presentation serves as a companion and guide to the public data release (http://irsa.ipac.caltech.edu/Missions/bolocam.html) through NASA's Infrared Processing and Analysis Center (IPAC) Infrared Science Archive (IRSA). New data releases will be provided through IPAC-IRSA with any future improvements in the reduction. The BGPS provides a complementary long-wavelength spectral band for the ongoing ATLASGAL and Herschel-SPIRE surveys, and an important database and context for imminent observations with SCUBA-2 and ALMA.
机译：我们提出了Bolocam银河平面调查（BGPS），这是一个1.1毫米的连续测量，在北半球可见的银河平面170度〜2的33英寸有效分辨率上。 BGPS是毫米波连续体中没有预先选择的目标的最早的大面积，银河系系统的系统性调查之一。调查在10.5≤l≤90.5范围内是连续的| b |。 ≤0.5。朝向CygnusX螺旋臂，覆盖范围扩大到| b |。对于75.5≤l≤_287.5，≤1.5。另外，| b |的横切面≤1.5的atl = 3,15，30，和31。此部分的总面积为133 deg〜2。除纬度增加外，没有对该地区的覆盖范围应用预选标准。除连续区域外，在银河系外还观察到四个目标区域：IC1396（9deg〜2，97.5≤l≤100.5,2.25≤b≤5.25），一个朝向英仙臂的区域（4 deg〜2中心位于onl = 111，b = 0在NGC 7538附近），W3 / 4/5（18度〜2，132.5≤l≤138.5）和宝石OB1（6度〜2，187.5≤l≤193.5）。这项调查已在整个银河系内检测到大约8400个团块，达到一个限制的非均匀1σ噪声水平，范围在11-53 mJy beam-1范围内。 BGPS源目录在先前发布的配套文件中提供。本文详细介绍了图像的调查观察和数据缩减方法。我们详细讨论了天文测量和通量密度校准不确定度的确定，并将我们的结果与文献进行了比较。提出了将数据信号从数据时间流中随时间变化的大气波动中分离出来的数据处理算法。这些算法可在有限的角度范围内再现天文天空的结构，并在明亮光源附近产生伪影。根据模拟，我们发现，大于约5'9的尺度上的扩展发射几乎完全衰减（> 90％），而衰减达到50％的线性尺度为3'.8。与其他毫米波数据集的比较表明，磁通量校准中可能存在系统性偏移，尚未发现原因。此演示文稿是通过NASA红外处理和分析中心（IPAC）红外科学档案（IRSA）进行公共数据发布（http://irsa.ipac.caltech.edu/Missions/bolocam.html）的伴随和指南。将通过IPAC-IRSA提供新的数据发布，并在减少方面进行进一步改进。 BGPS为正在进行的ATLASGAL和Herschel-SPIRE调查提供了一个互补的长波谱带，并为即将进行SCUBA-2和ALMA观测提供了重要的数据库和环境。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号