The INT Galactic Plane Survey (IGAPS) is the merger of the optical photometric surveys, IPHAS and UVEX, based on data from the Isaac Newton Telescope (INT) obtained between 2003 and 2018. Here, we present the IGAPS point source catalogue. It contains 295.4 million rows providing photometry in the filters, i , r , narrow-band H α , g , and U _(RGO). The IGAPS footprint fills the Galactic coordinate range, | b | < 5° and 30°?< ? < 215°. A uniform calibration, referred to as the Pan-STARRS system, is applied to g , r , and i , while the H α calibration is linked to r and then is reconciled via field overlaps. The astrometry in all five bands has been recalculated in the reference frame of Gaia Data Release 2. Down to i ?～?20 mag (Vega system), most stars are also detected in g , r , and H α . As exposures in the r band were obtained in both the IPHAS and UVEX surveys, typically a few years apart, the catalogue includes two distinct r measures, r _( I )and r _( U ). The r 10 σ limiting magnitude is approximately 21, with median seeing of 1.1 arcsec. Between approximately 13th and 19th mag in all bands, the photometry is internally reproducible to within 0.02 mag. Stars brighter than r ?=?19.5 mag are tested for narrow-band H α excess signalling line emission, and for variation exceeding | r _( I )??? r _( U )| = 0.2 mag. We find and flag 8292 candidate emission line stars and over 53 000 variables (both at > 5 σ confidence).
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机译：int Galactic Plane Squal（IGAP）是基于2003年至2018年之间获得的ISAAC Newton望远镜（INT）的数据的滤光测量调查，IPHA和UVEX的合并。在这里，我们介绍了IGAP点源目录。它包含295.4万行，在滤波器，I，R，窄带Hα，G和U _（RGO）中提供光度测量。 IGAP占地面积填充了银河坐标范围，| B | <5°和30°？<？ <215°。均匀校准，称为PAN-STARRS系统，应用于G，R和I，而Hα校准链接到R，然后通过场重叠协调。所有五个频段中的天数在盖亚数据发布的参考帧中已经重新计算了2.下降到I？〜20mag（Vega系统），大多数恒星也被检测到G，R和Hα。由于在IPHA和UVEX调查中获得R带中的曝光，通常几年分开，目录包括两个不同的R度，R _（i）和r _（u）。 R10Σ限制幅度约为21，中值观察1.1 arcSec。在所有带中大约13和19m的Mag之间，光度测量在0.02 mag内的内部可重复。恒星比R？= 19.5 MAG用于窄带Hα过量的信号线发射，并进行变化超过| r _（i）??? r _（u）| = 0.2 mag。我们发现并旗帜8292候选人排放线恒星和超过53 000个变量（均为5Σ信心）。
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