13.7米毫米波射电望远镜观测数据

13.7米毫米波射电望远镜观测产出的毫米波分子谱线数据，有三种观测数据。第一种是按观测者需求，采用单点观测模式观测的数据，每条谱线对应一个一维fits文件，数据库表中一条记录对应一个文件的头信息，自2003年至今(2023.06,下同)共观测323万多条谱线。第二种是按观测者需求采用OTF模式观测的数据，每天对同一个区域成图扫描结果，合拼叠加后生成2个fits cube文件，数据库表中一条记录对应2个文件的头信息。扫描区域10′×10′到30′×30′不等，自2011年至今共观测6900多个区域。第三种是“银河画卷”巡天计划观测数据，对北天银道面附近利用CO 及其同位素13CO和C18O的 J=1-0三条分子谱线同时进行大天区观测。一期巡天历时10年，已经于2021年4月底结束，共完成0°≤ l≤ 240°,|b|≤ 5°范围共2400平方度的探测覆盖，建立了毫米波射电天文数据库。经过巡天工作组讨论，决定继续组织二期巡天，将巡天区域扩展至银道面附近银纬正负10度的范围。巡天数据将有助于拓展科学目标，为多波段天文研究提供更广域的分子气体分布数据。二期巡天已经于2021年9月1日开始，巡天预计将持续10年。

Millimeter-wave molecular spectral line data obtained from the 13.7-meter millimeter-wave radio telescope, which includes three types of observational datasets. The first type is data acquired via single-point observation mode per observer's requirements. Each spectral line corresponds to a one-dimensional FITS file, and one record in the database table corresponds to the header information of one file. From 2003 to the present (June 2023, same below), more than 3.23 million spectral lines have been observed. The second type is data obtained via On-The-Fly (OTF) observation mode per observer's requirements. For each observed region, daily mapping scan results are combined and stacked to generate two FITS cube files, and one record in the database table corresponds to the header information of these two files. The scan areas range from 10′×10′ to 30′×30′, and more than 6,900 regions have been observed since 2011. The third type is observational data from the Galactic Panorama Survey, which conducts large-sky simultaneous observations of three molecular spectral lines: CO, its isotopologues ¹³CO and C¹⁸O, all at their J=1-0 rotational transitions, near the northern Galactic plane. The first phase of the survey lasted 10 years and concluded at the end of April 2021, having completed detection coverage of 2400 square degrees within the range of 0° ≤ l ≤ 240°, |b| ≤ 5°, and the Millimeter-wave Radio Astronomy Database was established. Following discussions by the survey working group, it was decided to proceed with the second phase of the survey, expanding the survey area to the range within ±10° Galactic latitude near the Galactic plane. The survey data will help expand scientific objectives and provide broader molecular gas distribution data for multi-wavelength astronomical research. The second phase of the survey started on September 1, 2021, and is expected to last 10 years.

搜集汇总

背景与挑战

背景概述

该数据集包含13.7米毫米波射电望远镜自2003年以来的观测数据，主要分为单点观测、OTF成图和'银河画卷'巡天三种类型，覆盖毫米波分子谱线，数据量达64.37 TB。'银河画卷'巡天已完成一期2400平方度探测，二期于2021年启动，旨在扩展至银纬正负10度区域，为多波段天文研究提供分子气体分布数据。