Abstract
The Diffuse X-rays from the Local Galaxy (DXL) payload is a sounding rocket experiment designed to study faint, spatially extended soft X-ray emission, including SWCX (Galeazzi et al., 2011, Uprety et al., 2016). The DXL instrument, in its flight #4 configuration, consists of two large-area, thin-window proportional counters optimized for energies below 1.5 keV. The data are the final products from the Diffuse X-ray from the Local galaxy (DXL) sounding rocket mission - flight #4. DXL flight #4 was launched from Wallops Flight Facility (geographic latitude: 37.933 deg N, longitude: 75.468 deg W) on January 9, 2022 at 12:00 am local time. The payload executed four successive scans across the northern cusp region. The scans were offset in azimuth with respect to one another (two Ð 2 & 4 Ð in the middle of the expected cusp position, the other two Ð 1 & 3 Ð offset by 5 degrees on each side), In addition, a fast 360 deg scan of the sky was also performed after scan #4 for calibration and background subtraction.
The azimuth and time of the scans are (Galeazzi et al. 2026):
Scan 1 (-5 deg): 116.3 s - 166.3 s
Scan 2 (0 deg): 173.3 s - 223.3 s
Scan 3 (+5 deg): 230.3 s - 280.3 s
Scan 4 (0 deg): 287.3 s - 337.3 s
Med scan 1 (0 deg): 337.3 s - 382.3 s
Earth scan (background): 382.3 s - 397.8 s
Med scan 2 (0 deg): 397.8 s - 412.8 s