Supplement Series

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

The Australia Telescope Compact Array is operated by the Australia Telescope National Facility, CSIRO, as a national facility.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...field.

However, we note that the luminosity function and hence flux density distribution of OH/IR stars may be different for stars close to the galactic Centre, with slightly higher OH luminosities than elsewhere in the Galaxy (Blommaert et al. 1992). If this is the case, then we would expect to have detected a higher fraction of stars in the central field, but this is hard to quantify.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...used.

In all passes the cell size roughly equals the HWHM of the synthesized beam, because when imaging with a cell size of 5181#181 182#182 10183#183 those visibilities observed on long baselines will be discarded and the resulting synthesized beam will have larger HWHM. Therefore, the accuracy of the fitted position (Sect. 5.2, Fig. 5 (click here)) is of the order of 0.2 cell sizes in all passes, and, since the SNR in the first passes is high, it is easily seen from Fig. 5 (click here) that the absolute value of this error should be roughly the same for all passes.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...declination.

The size synthesized beam of the ATCA in this region of the sky in the north-south direction (declination) is twice that in the east-west direction (right ascension). As a consequence, the synthesized-beam highest sidelobes are found twice as far away in declination as in right ascension, but with similar strength.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.