Table 3.
Open in new tab

e-MERGE DR1 image summary.

Image nameDescriptionFrequencySynthesized beam|$\sigma _{\rm rms}^a$|
    (μJy beam−1)
VLANaturally weighted1.5 GHz1.68 × 1.48 arcsec2 @ |$105{^{\circ}_{.}}88$|2.04
Combined (Max. Sens.)e-MERLIN + VLA combined-array image,1.5 GHz0.89 × 0.78 arcsec2 @ 105○1.71
weighted for improved sensitivity
Combined (PSF Match)e-MERLIN + VLA, weighted to match VLA1.5 GHz0.56 × 0.47 arcsec2 @ 88○1.94
5.5-GHz resolution for spectral index work
Combined (Max. Res.)e-MERLIN + VLA, weighted for1.5 GHz0.28 × 0.26 arcsec2 @ 84○1.17
improved angular resolution
e-MERLINe-MERLIN-only, naturally weighted1.5 GHz0.31 × 0.21 arcsec2 @ 149○2.50
C-band mosaic5.5 GHz, naturally weighted mosaicb5.5 GHz0.56 × 0.47 arcsec2 @ 88○1.84
Image nameDescriptionFrequencySynthesized beam|$\sigma _{\rm rms}^a$|
    (μJy beam−1)
VLANaturally weighted1.5 GHz1.68 × 1.48 arcsec2 @ |$105{^{\circ}_{.}}88$|2.04
Combined (Max. Sens.)e-MERLIN + VLA combined-array image,1.5 GHz0.89 × 0.78 arcsec2 @ 105○1.71
weighted for improved sensitivity
Combined (PSF Match)e-MERLIN + VLA, weighted to match VLA1.5 GHz0.56 × 0.47 arcsec2 @ 88○1.94
5.5-GHz resolution for spectral index work
Combined (Max. Res.)e-MERLIN + VLA, weighted for1.5 GHz0.28 × 0.26 arcsec2 @ 84○1.17
improved angular resolution
e-MERLINe-MERLIN-only, naturally weighted1.5 GHz0.31 × 0.21 arcsec2 @ 149○2.50
C-band mosaic5.5 GHz, naturally weighted mosaicb5.5 GHz0.56 × 0.47 arcsec2 @ 88○1.84

aσrms values are in units of |$\mu$|Jy beam−1, and are therefore dependent on the beam size – the ‘max res’ combination image has the lowest σrms (and therefore, the best point-source sensitivity of all images in this data release), however, the small beam limits its sensitivity to extended emission, to which the lower resolution combined-array images – with slightly higher σrms – are more sensitive.

bPreviously published by Guidetti et al. (2017).

Table 3.
Open in new tab

e-MERGE DR1 image summary.

Image nameDescriptionFrequencySynthesized beam|$\sigma _{\rm rms}^a$|
    (μJy beam−1)
VLANaturally weighted1.5 GHz1.68 × 1.48 arcsec2 @ |$105{^{\circ}_{.}}88$|2.04
Combined (Max. Sens.)e-MERLIN + VLA combined-array image,1.5 GHz0.89 × 0.78 arcsec2 @ 105○1.71
weighted for improved sensitivity
Combined (PSF Match)e-MERLIN + VLA, weighted to match VLA1.5 GHz0.56 × 0.47 arcsec2 @ 88○1.94
5.5-GHz resolution for spectral index work
Combined (Max. Res.)e-MERLIN + VLA, weighted for1.5 GHz0.28 × 0.26 arcsec2 @ 84○1.17
improved angular resolution
e-MERLINe-MERLIN-only, naturally weighted1.5 GHz0.31 × 0.21 arcsec2 @ 149○2.50
C-band mosaic5.5 GHz, naturally weighted mosaicb5.5 GHz0.56 × 0.47 arcsec2 @ 88○1.84
Image nameDescriptionFrequencySynthesized beam|$\sigma _{\rm rms}^a$|
    (μJy beam−1)
VLANaturally weighted1.5 GHz1.68 × 1.48 arcsec2 @ |$105{^{\circ}_{.}}88$|2.04
Combined (Max. Sens.)e-MERLIN + VLA combined-array image,1.5 GHz0.89 × 0.78 arcsec2 @ 105○1.71
weighted for improved sensitivity
Combined (PSF Match)e-MERLIN + VLA, weighted to match VLA1.5 GHz0.56 × 0.47 arcsec2 @ 88○1.94
5.5-GHz resolution for spectral index work
Combined (Max. Res.)e-MERLIN + VLA, weighted for1.5 GHz0.28 × 0.26 arcsec2 @ 84○1.17
improved angular resolution
e-MERLINe-MERLIN-only, naturally weighted1.5 GHz0.31 × 0.21 arcsec2 @ 149○2.50
C-band mosaic5.5 GHz, naturally weighted mosaicb5.5 GHz0.56 × 0.47 arcsec2 @ 88○1.84

aσrms values are in units of |$\mu$|Jy beam−1, and are therefore dependent on the beam size – the ‘max res’ combination image has the lowest σrms (and therefore, the best point-source sensitivity of all images in this data release), however, the small beam limits its sensitivity to extended emission, to which the lower resolution combined-array images – with slightly higher σrms – are more sensitive.

bPreviously published by Guidetti et al. (2017).

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