Channel map of the [CI](1−0) (colour scale) and CO(4−3) (contours, black is the largest value) emission of the high velocity gas component at +175 km s^-1. The filled black circle shows the 46′′ angular resolution of the [CI](1−0) data. The solid straight line shows the position of the Galactic plane at b = 0°, with marks denoting a few Galactic longitude values for orientation. The structure belongs to the X₁ orbits in the gravitational potential of the GC. The emission from both lines show large spatial coincidence, though intensity ratios can have large variations, especially towards the CO(4−3) peak, at the upper left corner of the image.