Beam study using Saturn observation

• Warning:

• Saturn is extended (about 20 arcsec) so we expect the main beam to be very large.
• Saturn is so bright that it saturates at the center.

Using a decorrelation of the noise

Maps of Saturn at 1.25mm and 2.05mm

• The contours shown correspond to 1/10, 1/100, 1/1000 and 1/10000 of the maximum of the map (which is not well calibrated)

  1mm_map.pdf	2mm_map.pdf

Beam profiles at 1.25mm and 2.05mm

• The yellow dots are data points that are negative but for this log plot, we show their absolute value

  1mm_pro.pdf	2mm_pro.pdf

Far side lobe at 1.25mm and 2.05mm

• The cross correpond to the arms of the secondary miror of the telescope.

  1mm_satmap.pdf	2mm_satmap.pdf

Using a logarithmic scale

• 1mm_log.pdf	2mm_log.pdf

With no decorrelation at all (only projection)

• The map and the profile show no sign of plateau at 1mm. At 2mm, we have a weak extension (less than 1%) that might be due to a plateau, but which is not significant.

  1mm_nodec.pdf	2mm_nodec.pdf

  1mm_nodec_pro.pdf	2mm_nodec_pro.pdf