LWA1 Radio Maps
2.0° to 4.7°
HEALPix, ring, res 8 (Nside=256)
Original Data Source:
This is a survey of the radio sky done using the first station of the Long Wavelength Array at nine frequencies between 35 and 80 MHz with spatial resolutions ranging from 4.7° to 2.0°, respectively. The maps cover the sky north of a declination of -40°. A conservative estimate of the calibration accuracy of these maps is in the 15–25 per cent range, in terms of both the resolved structure and the sky-averaged temperature.
Notes.aAssuming natural weighting.
bCalculated from source counts at 1.49 GHz (Condon 1974; Mitchell & Condon 1985) and scaled to these frequencies using a spectral index of −0.7 (Lane et al. 2014).
cCalculated assuming a 61-ms integration time and a sky temperature of 2000 K at 74 MHz with a spectral index of −2.5.
More details can be found in:
"The LWA1 Low Frequency Sky Survey", Dowell, J., et al. 2017, MNRAS, 469, 4537, ADS