As part of the MWAX new correlator development and testing, an observation was taken using both the MWAX correlator and the existing MWA correlator.
Obs ID: 1247842824
View MWA Correlator observation info
View Receiver PPDs
MWA and MWAX correlator mode:
- Frequency averaging: 10 kHz
- Integration time: 1 second
Even though the array was in long baseline mode, we decided to take the observation in a mode which both correlators support. MWA normally runs at 0.5 sec integration time, however MWAX supports 0.4 or 0.6 seconds. So it was decided in the interest of comparing like with like to run both at the next best setting they have in common: 1 second integration times.
MWAX Corrections Applied: None
- Specifically:
- No cable length corrections (this feature will be implemented soon and will be controlled by a flag in the metafits)
- No geometric corrections (this feature will be implemented soon and will be controlled by a flag in the metafits)
- No digital gain correction (this feature will be implemented soon and will be controlled by a flag in the metafits)
- No bandpass corrections
Observation duration:
- MWA: 120 seconds
- MWAX: first 40 seconds
Channel selection comparison:
| Receiver Channel # | MWA Coarse Channel # | MWAX Coarse Channel # |
|---|---|---|
| 112 | 9 | 1 |
| 113 | 10 | 2 |
| 114 | 11 | 3 |
| 115 | 12 | 4 |
| 116 | 13 | 5 |
| 117 | 14 | 6 |
Data Access:
Download MWA observation via MWA ASVO: click here (24 coarse channels, metafits)
Download MWAX data from HTTP server at Curtin: click here (6 coarse channel fits files and a 'doctored metafits to be consistent with 6 coarse channels and only 40 second duration)
Receiver / Tile health:
All tiles produced data in this observation
Point of interest:
There is some RFI in ch114 at around 145.84 MHz. This can be seen in both the legacy correlator data as well as the MWAX data.
NOTE:
See the following articles for information on ordering of data and fits format: