FCRAO Perseus 13CO cubes and map

<p><b>Description:</b><br /> 3D data cube of <sup>13</sup>CO emission in Perseus. Data were obtained at FCRAO using the On-the-Fly (OTF) mapping method during 2002-2004. Units are uncorrected antenna temperature (T<sub>A</sub><sup>*</sup>) in Kelvin. Up-to-date values of the forward-scattering efficiency (eta_n) can be obtained from the FCRAO website. Velocities are in m/s. <br />The map has a Samsom-Flamsteed (SFL) projection. </p> <p><b>Telescope:</b><br /> <a href="http://www.astro.umass.ed
u/~fcrao">FCRAO</a></p> <p><b>Status:</b><br /> Finished, although some observations to improve the noise are ongoing.</p> <p><b>Sampling:</b><br /> The data were taken in OTF mode, which means they are over-sampled at irregular intervals. The spectra are re-gridded to 23" pixels (approximately Nyquist sampled). </p> <p><b>Areal Coverage:</b><br /> Approx 6.25 by 3 degrees</p> <p><b>Map Center (Galactic):</b><br /> l = +159:13:00<br /> b = -19:15:00</p> <p><b>Map Center (J2000):</b><br /> R
A = 03:37:00 <br /> Dec = +31:49:00</p> <p><b>Comments on Resolution:</b><br /> The resolution of FCRAO at 110GHz is approximately 46". Data are convolved onto a 23" grid.</p>

<b>数据集描述：</b><br />本数据集为英仙座（Perseus）天区的碳-13一氧化碳（¹³CO）发射线三维数据立方体。数据于2002至2004年间在FCRAO采用实时（On-the-Fly, OTF）映射法采集。单位为未校正天线温度（T_A^*），单位为开尔文。前向散射效率（η_n）的最新参数可从FCRAO官方网站获取。速度单位为米每秒（m/s）。<br />该天图采用桑普森-弗兰斯蒂德（Sampson-Flamsteed, SFL）投影。<br /><b>望远镜：</b><br /><a href="http://www.astro.umass.edu/~fcrao">FCRAO</a><br /><b>项目状态：</b><br />数据集已完成，但部分用于优化噪声水平的观测仍在进行中。<br /><b>采样方案：</b><br />数据采用OTF模式采集，即采用非均匀间隔过采样；所有光谱已被重网格化至23角秒的像素尺度，近似满足奈奎斯特采样要求。<br /><b>天区覆盖范围：</b><br />约6.25°×3°<br /><b>银河系坐标系天图中心：</b><br />银经l = +159:13:00<br />银纬b = -19:15:00<br /><b>J2000天球坐标系天图中心：</b><br />赤经RA = 03:37:00<br />赤纬Dec = +31:49:00<br /><b>分辨率说明：</b><br />FCRAO在110GHz频段的角分辨率约为46角秒，数据已被卷积至23角秒的网格尺度。

搜集汇总

背景与挑战

背景概述

该数据集是一个关于Perseus分子云的13CO发射3D数据立方体和地图，由FCRAO望远镜在2002-2004年使用On-the-Fly映射方法获取，数据单位为未校正的天线温度（开尔文）。覆盖区域约为6.25×3度，分辨率为46"并卷积到23"网格，包含银河系和J2000坐标的中心位置信息。