Astronomer
LWA1 Specification Summary
The table below lists the specifications of the LWA1 (the first LWA station).
Specification |
Details |
Comment |
---|---|---|
Number of stands |
257 |
One outrigger antenna at 300m baseline |
Frequency coverage ν |
10-88 MHz |
|
Number of beams |
4 |
|
Number of tunings |
2 per beam |
|
Number of polarizations, Npol |
2 per beam per tuning |
|
Bandwidth per beam, B |
19.6 MHz max |
16 MHz usable due to band edges |
Declination range |
-30° to 90° |
|
All sky transient mode TBN |
1-67 kHz bandwidth |
Continuous observing all dipoles |
All sky transient mode TBW |
78 MHz bandwidth |
Periodic bursts observing all dipoles |
Spectrometer |
Minimum channel width 7.8125 kHz |
|
SEFD |
3 kJy |
At zenith |
Sensitivity Smin |
5 Jy |
5 sigma, 1 sec, 16MHz, zenith |
Confusion noise (zenith)1 |
25 Jy/beam |
for a 2° beam at 74 MHz, only theoretical estimate |
1 The confusion limit will be reached in about 1 msec using 8 MHz bandwidth. Longer integrations can be achieved for narrower bandwidths.
LWA Sevilleta (LWA-SV) Specification Summary
The table below lists the specifications of the LWA-Sevilleta station.
Specification |
Details |
Comment |
---|---|---|
Number of stands |
257 |
One outrigger 500m to the West |
Frequency coverage ν |
10-88 MHz |
|
Number of beams |
2 |
|
Number of tunings |
2 per beam |
Beams are required to have same tunings |
Number of polarizations, Npol |
2 per beam per tuning |
|
Bandwidth per beam, B |
10 MHz max |
|
Declination range |
-30° to 90° |
|
All sky transient mode TBN |
1-67 kHz bandwidth |
Continuous observing all dipoles |
All sky transient mode TBF |
20 MHz bandwidth |
Approximately 1s dumps every 3 min |
Spectrometer |
Minimum channel width 7.8125 kHz |
|
SEFD |
6 kJy |
At zenith |
Sensitivity Smin |
5 Jy |
5 sigma, 1 sec, 16MHz, zenith |
Confusion noise (zenith)1 |
25 Jy/beam |
for a 2° beam at 74 MHz, only theoretical estimate |