SAM = SOAR Adaptive Module


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  • Improved angular resolution at optical and infrared wavelengths 
  • Uniform and selective compensation of low-altitude turbulence
  • A relatively wide field (3 arcminutes)
  • FWHM resolution improved to 0.3"-0.5" under good conditions
  • Integrated CCD Imager
  • Correction achieved using a low-altitude Rayleigh laser guide star and two (or one) tip-tilt guide stars (R<18)


July 23, 2014. The results of the deep imaging of the "Cosmic Skidmark" (interacting galaxy in a cluster) were presented at a conference by the PI, David Murphy (U. Catolica, Chile). The object was also observed at the VLT with VIMOS and is scheduled for observations with ALMA. More information in the Poster and Presentation .
Skidmark

July 14, 2014. In March 2014, SAM was used to probe the binarity of low-mass stars paired to nearby solar-type dwarfs. One 0.2 arcsec binary was discovered. The paper is accepted by the Astronomical Journal. Its preprint is available at ArXiv:1407.6045

March 25, 2014. The report on SAM science verification is posted. Get the report here.
In March 2014, SAM executed two observing proposals. The image below taken on March 4, 2014, shows gravitational arc MACS1206.2-0847 (combined from two 12-min. exposures in the i' and r' filters, FWHM resolution of 0.36 and 0.39 arcsec, respectively).
Arc

February 2014. The SAM science verification program is finished in the January 2014 run. The picture below shows gravitational arcs in the galaxy cluster Abel 370 as seen by by the SDSS, HST, and SAM (from SV proposal by G.~Caminha et al.)
Abel 370

The FULL IMAGE shows an amazing picture where almost every source is a distant galaxy, partially resolved by SAM, and only few are stars. The dark shadow on the left is produced by the SAM guide probe wich used a guide star at the periphery of the science field (this is a region of low star density). Several gravitational arcs are seen in the image. Elongation of galaxies caused by the weak lensing is also noticeable. The images were taken on September 29, 2013 under non-optimal conditions and has a FWHM resolution of 0.5 arcsec. Five 5-min. exposures in the SDSS i' and r' filters were combined to produce the picture.


December 3, 2013. The report on SAM commissioning is posted. Get the report here.

February 2013. Composite image of the planetary nebula NGC~2440 taken with SAM on February 26, 2013. The (r,g,b) colors correspond to the B,V,Halpha, the FWHM resolution is 0.35 arcsec in all bands.
NGC 2440




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