3-D plot of the artificially dimmed star HIC 74324 (without and with AO correction)

This 3-D plot demonstrates the correction performance of MACAO-VLTI when using a faint guide star. The observed star (HIC 74324 (stellar spectral type G0 and visual magnitude 9.4) was artificially dimmed by a neutral optical filter to visual magnitude 16.5. The observation was carried out in 0.55 arcsec seeing and with a rather short atmospheric correlation time of 3 milliseconds at visible wavelengths. The Strehl ratio in the 25-second K-band exposure is about 10% and the FWHM is 0.14 arcseconds. The uncorrected image is shown to the left for comparison. The improvement is again impressive, even for a star as faint as this, indicating that guide stars of this magnitude are feasible during future observations.

Credit:

ESO

About the Image

Id:eso0313f
Type:Simulation
Release date:13 May 2003
Related releases:eso0313
Size:988 x 688 px

About the Object

Name:HIC 74324
Type:• Milky Way : Star
• X - Stars

Image Formats

Fullsize Original
158.6 KB
Large JPEG
67.3 KB
Screensize JPEG
59.1 KB

Wallpapers

1024x768
74.8 KB
1280x1024
104.0 KB
1600x1200
132.3 KB
1920x1200
153.5 KB
2048x1536
183.3 KB

 

Also see our