Apertif DR2 - HI spectral cubes
Apertif is a phased-array feed system for the Westerbork Synthesis
Radio Telescope (WSRT), providing forty instantaneous beams over 300
MHz of bandwidth. A description of the second data release is to be
included here. This service queries the spectral line cubes from the
second data release of Apertif. Four line cubes are produced over a
set of different frequency ranges as follows. Cube 0: 1292.5–1337.1
MHz, Cube 1: 1333.1–1377.7 MHz, Cube 2: 1373.8–1418.4 MHz, Cube 3:
1414.5–1429.3 MHz. Cube 3 is produced at full spectral resolution of
12.2 kHz while other cubes are produced with a 3-channel averaging at
36.6 kHz resolution. The cubes have a spatial extent of 1.1 deg × 1.1
deg (661 × 661 pixels, with 6''/pixel). The median noise for all line
cubes, with a spectral resolution of 36.6 kHz, is 1.6 mJy/beam,
corresponding to a 3-σ H I column density sensitivity of 1.8 × 10^20
atoms cm^−2 over 20 km s^−1 (for a median angular resolution of 24″ ×
15″). The corresponding dirty beam cubes are also released to allow
offline cleaning of source emission.
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