Co-temporal snapshots of the standard jet of 2008 September 22 showing that nearly all of the plasma in the jet's spire was hotter than ~1.5 × 10 ⁶ K. Top: XRT image of the jet and its surroundings in the northern polar coronal hole. This is a larger sub field of view taken from the same frame of the XRT movie as the fourth frame of Figure 2. It shows the jet when the bright point was near its peak in size and brightness. Middle left: EUVI B 195 Å image of about the same heliographic area viewed in the top image. Middle right: EUVI A 195 Å image of roughly the same heliographic area. Bottom left: EUVI B 304 Å image of nearly the same area viewed in the EUVI B 195 Å image above it. Bottom right: EUVI A 304 Å image of nearly the same area viewed in EUVI A 195 Å image above it. In each image, the slanted arrow points to the jet's bright point, the horizontal arrow points to the X-ray-bright ephemeral active region seen in the top image, and the universal time is in the upper right corner. The angle of separation from Earth was 39° for STEREO A and 35° for STEREO B.