GLIMPSE II Epoch2 Archive

The Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSEII) imaged longitudes ±10◦ of the central region of the Galaxy. The latitude coverage is ±1◦ from |l| =10◦to 5◦, ±1.5◦ from |l| =5◦to 2◦, and ±2◦ from |l| =2◦to 0◦. GLIMPSEII coverage excludes the Galactic center region l=±1◦, b=±0.75◦ observed by the GALCEN GO program (PID=3677). GLIMPSEII had two-epoch coverage for a total of three visits on the sky. The observations consisted of two 1.2 second integrations at each position in the first epoch of data taking (September 2005) and a single 1.2 second integration at each position six months later (April 2006). The GLIMPSEII Archive (GLMIIA or the “Archive”) consists of point sources with a signal- to-noise > 5 in at least one band and less stringent selection critera than the Catalog. The photometric uncertainty is typically < 0.3 mag. The GLIMPSEII Catalog is a subset of the Archive, but note that the entries for a particular source might not be the same due to additional nulling of magnitudes in the Catalog because of the more stringent requirements. This dataset or service is made available by the Infrared Science Archive (IRSA) at IPAC, which is operated by the California Institute of Technology under contract with the National Aeronautics and Space Administration.

银河遗产红外银道面巡天特辑（Galactic Legacy Infrared Mid-Plane Survey Extraordinaire，GLIMPSEII）对银河系中心区域的银经范围开展了±10°的成像观测。其银纬覆盖范围为：当|银经|为10°至5°时，覆盖±1°；|银经|为5°至2°时，覆盖±1.5°；|银经|为2°至0°时，覆盖±2°。GLIMPSEII的观测范围排除了GALCEN GO项目（项目编号PID=3677）所观测的银经±1°、银纬±0.75°的银河系中心区域。GLIMPSEII采用两阶段观测策略，总计开展3次天区访问。第一阶段观测（2005年9月）中，每个天区位置均进行两次1.2秒的积分曝光；时隔6个月后的第二阶段观测（2006年4月）中，每个天区位置仅进行一次1.2秒的积分曝光。GLIMPSEII存档库（GLIMPSEII Archive，简称GLMIIA或"存档库"）包含至少一个波段内信噪比大于5的点源，且其筛选标准相较GLIMPSEII星表更为宽松。该库的测光不确定度通常小于0.3星等。GLIMPSEII星表是存档库的子集，但需注意：由于星表采用了更为严格的筛选条件，会额外剔除部分星等数据，因此同一源在存档库与星表中的条目可能存在差异。本数据集或服务由红外处理与分析中心（Infrared Processing and Analysis Center，IPAC）下属的红外科学档案馆（Infrared Science Archive，IRSA）提供，IPAC由加州理工学院与美国国家航空航天局（National Aeronautics and Space Administration，NASA）签订合同运营。