Summary of the observational properties of the JVLA, GBT and combined data.
|Channel width (kHz)||3.906||3.906||2.86||2.86||7.812||7.812|
|Velocity resolution (km s−1)||0.049||0.049||0.036||0.036||0.098||0.098|
|RMS noise (mJy beam−1)||3.53||3.63||170.0||180.0||3.71||3.82|
|Beam major axis (″)||3.87||3.77||31.32||31.32||4.35||4.30|
|Beam minor axis (″)||2.81||2.87||31.32||31.32||3.44||3.48|
|Position angle (°)||30.95||30.56||0.0||0.0||30.95||30.56|
Notes. For the purpose of hyperfine structure fitting, velocity resolutions were smoothed to 0.098 km s−1 for the JVLA, and 0.072 km s−1 for the GBT. RMS noise was estimated from emission free areas. The combined data were smoothed by a Gaussian kernel of 2.4″, and have the same spectral resolution as the smoothed JVLA data. The quoted RMS noise of the GBT data includes the applied calibration factor.
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