A quick look at the all-sky HI colour map (Fig.1)
South Galactic Hole (SGH), at b=50o with NH
comparable to the those
in the Lockman Hole (~0.7x1020 cm2).
Fig.1 - Leiden/Dwingeloo HI Survey in galactic coordinates.
Fig.2 shows NH contours in a 5x5 degrees
around the SGH. These values are consistent with those provided by the
Galactic NH Tool ``Colden" at the AXAF Science Center. A 2x2 degree
around the SGH has been scanned with 9 DSS plates to search for a 16
field not contaminated by bright (m<12) stars.
Fig.2 - NH values in units of 1020 cm2 around the South Galactic Hole (blue) and DSS scans (red). The cross indicates the selected field.
The field contains stars fainter than 14th mag and has optimal visibility in Chile from September through January (peak in November). The NED database does not yield any relevant sources in the field. Moreover, no X-ray sources from the ROSAT ALL-Sky Survey Catalogue are found.