POSSUM Status Monitor



The survey status, both for the observations and the pipelines, are shown below. There are also Aladin overlays that show both the observations and tiles.

The observation status figures show the status of each field planned for both the surveys POSSUM is commensal with: EMU (band 1, 800-1088 MHz) and WALLABY (band 2, 1396-1440 MHz). These bands are processed completely separately, so their data status is shown separately. A figure showing the sky area overlap of the two bands is shown below.

Observations progress through several stages: Some fields are observed as two separate observations. These are marked as semi-circles, which show the status of each observation.

The POSSUM-AusSRC pipeline breaks the data into smaller tiles (approximately 3.5 square degrees) and performs additional useful processing steps that we consider essential prior to polarization analysis. The tiles are available through POSSUM and are used in the analysis pipelines. The tiles likewise progress through several stages of processing and analysis: the tiles expected for the full survey area, those that have been produced by the mosaicking step of the POSSUM-AusSRC pre-processing pipeline, and those processed by the POSSUM 1D and 3D analysis pipeline. Full processing with the 1D pipeline is only possible when all the neighbouring tiles are also mosaicked.

The data shown in the figures below is also available in tabular form on this Google Sheet.

Full survey - band 1 (EMU-commensal)


EMU fields are a single 10-hour observation through the main body of the survey, and 2x 5-hour observations above a declination of -12 deg. Each 5 hour observation is processed independantly (and shown as a half-circle).

Aladin Lite Overlays


Full survey band 1 observations - Equatorial Full survey band 1 observations - Galactic Full survey band 1 tiles - Equatorial Full survey band 1 tiles - Galactic


Full survey - band 2 (WALLABY-commensal)


WALLABY fields are observed as 2x 8-hour observations with a slight coordinate offset between each observation; each is processed independently (and shown as a half-circle). Note that the observatory will not re-observe WALLABY fields that are rejected by POSSUM for poor data quality. Over time, this may introduce holes in the survey coverage if we are unlucky enough to reject both observations of the same field.

Aladin Lite Overlays


Full survey band 2 observations - Equatorial Full survey band 2 observations - Galactic Full survey band 2 tiles - Equatorial Full survey band 2 tiles - Galactic

Survey overlap regions.


The following figures show the approximate sky coverage of both bands, highlighting regions in which both bands have been observed. The plots come with several caveats:

Aladin Lite Overlays


Survey overlap regions - Equatorial Survey overlap regions - Galactic

Pilot - band 1

Aladin Lite Overlays


Pilot band 1 observations - Equatorial Pilot band 1 observations - Galactic Pilot band 1 tiles - Equatorial Pilot band 1 tiles - Galactic

Pilot - band 2

Aladin Lite Overlays


Pilot band 2 observations - Equatorial Pilot band 2 observations - Galactic Pilot band 2 tiles - Equatorial Pilot band 2 tiles - Galactic