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Dawson et al. have presented the full data release for the Southern
Parkes Large-Area Survey in Hydroxyl (SPLASH). SPLASH is the most
sensitive large-scale survey of hydroxyl (OH) to-date. The survey of
the Southern Galactic Plane was undertaken in all four ground-state
transitions of the OH radical at 1612, 1665, 1667 and 1720 MHz with
the Parkes 64m radio-telescope, "Murriyang". The survey covers the
inner Galactic Plane, primarily within 2 degrees of the galactic plane
and galactic longitudes between 332 degrees and 10 degrees, covering
the Central Molecular Zone and Galactic Centre.
The image above shows the SPLASH survey coverage, overlaid on the
velocity integrated carbon monoxide (CO) distribution (grey shaded area). Each 2 × 2
degree square corresponds to a single SPLASH tile. The hatched zone
indicates the previously piublished Pilot Region. Reference positions
for each tile are shown as white-filled circles. Dotted lines join
each reference position to its corresponding tile. Where deep
observations were carried out to characterise low-level signal in the
reference spectra, the corresponding reference position is shown as a
grey-filled circle.
The paper has been published in
Monthly Notices of the Royal Astronomical Society.
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